---
_id: '10223'
abstract:
- lang: eng
text: Growth regulation tailors development in plants to their environment. A prominent
example of this is the response to gravity, in which shoots bend up and roots
bend down1. This paradox is based on opposite effects of the phytohormone auxin,
which promotes cell expansion in shoots while inhibiting it in roots via a yet
unknown cellular mechanism2. Here, by combining microfluidics, live imaging, genetic
engineering and phosphoproteomics in Arabidopsis thaliana, we advance understanding
of how auxin inhibits root growth. We show that auxin activates two distinct,
antagonistically acting signalling pathways that converge on rapid regulation
of apoplastic pH, a causative determinant of growth. Cell surface-based TRANSMEMBRANE
KINASE1 (TMK1) interacts with and mediates phosphorylation and activation of plasma
membrane H+-ATPases for apoplast acidification, while intracellular canonical
auxin signalling promotes net cellular H+ influx, causing apoplast alkalinization.
Simultaneous activation of these two counteracting mechanisms poises roots for
rapid, fine-tuned growth modulation in navigating complex soil environments.
acknowledged_ssus:
- _id: LifeSc
- _id: M-Shop
- _id: Bio
acknowledgement: We thank N. Gnyliukh and L. Hörmayer for technical assistance and
N. Paris for sharing PM-Cyto seeds. We gratefully acknowledge the Life Science,
Machine Shop and Bioimaging Facilities of IST Austria. This project has received
funding from the European Research Council Advanced Grant (ETAP-742985) and the
Austrian Science Fund (FWF) under I 3630-B25 to J.F., the National Institutes of
Health (GM067203) to W.M.G., the Netherlands Organization for Scientific Research
(NWO; VIDI-864.13.001), Research Foundation-Flanders (FWO; Odysseus II G0D0515N)
and a European Research Council Starting Grant (TORPEDO-714055) to W.S. and B.D.R.,
the VICI grant (865.14.001) from the Netherlands Organization for Scientific Research
to M.R. and D.W., the Australian Research Council and China National Distinguished
Expert Project (WQ20174400441) to S.S., the MEXT/JSPS KAKENHI to K.T. (20K06685)
and T.K. (20H05687 and 20H05910), the European Union’s Horizon 2020 research and
innovation programme under Marie Skłodowska-Curie grant agreement no. 665385 and
the DOC Fellowship of the Austrian Academy of Sciences to L.L., and the China Scholarship
Council to J.C.
article_processing_charge: No
article_type: original
author:
- first_name: Lanxin
full_name: Li, Lanxin
id: 367EF8FA-F248-11E8-B48F-1D18A9856A87
last_name: Li
orcid: 0000-0002-5607-272X
- first_name: Inge
full_name: Verstraeten, Inge
id: 362BF7FE-F248-11E8-B48F-1D18A9856A87
last_name: Verstraeten
orcid: 0000-0001-7241-2328
- first_name: Mark
full_name: Roosjen, Mark
last_name: Roosjen
- first_name: Koji
full_name: Takahashi, Koji
last_name: Takahashi
- first_name: Lesia
full_name: Rodriguez Solovey, Lesia
id: 3922B506-F248-11E8-B48F-1D18A9856A87
last_name: Rodriguez Solovey
orcid: 0000-0002-7244-7237
- first_name: Jack
full_name: Merrin, Jack
id: 4515C308-F248-11E8-B48F-1D18A9856A87
last_name: Merrin
orcid: 0000-0001-5145-4609
- first_name: Jian
full_name: Chen, Jian
last_name: Chen
- first_name: Lana
full_name: Shabala, Lana
last_name: Shabala
- first_name: Wouter
full_name: Smet, Wouter
last_name: Smet
- first_name: Hong
full_name: Ren, Hong
last_name: Ren
- first_name: Steffen
full_name: Vanneste, Steffen
last_name: Vanneste
- first_name: Sergey
full_name: Shabala, Sergey
last_name: Shabala
- first_name: Bert
full_name: De Rybel, Bert
last_name: De Rybel
- first_name: Dolf
full_name: Weijers, Dolf
last_name: Weijers
- first_name: Toshinori
full_name: Kinoshita, Toshinori
last_name: Kinoshita
- first_name: William M.
full_name: Gray, William M.
last_name: Gray
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: Li L, Verstraeten I, Roosjen M, et al. Cell surface and intracellular auxin
signalling for H+ fluxes in root growth. Nature. 2021;599(7884):273-277.
doi:10.1038/s41586-021-04037-6
apa: Li, L., Verstraeten, I., Roosjen, M., Takahashi, K., Rodriguez Solovey, L.,
Merrin, J., … Friml, J. (2021). Cell surface and intracellular auxin signalling
for H+ fluxes in root growth. Nature. Springer Nature. https://doi.org/10.1038/s41586-021-04037-6
chicago: Li, Lanxin, Inge Verstraeten, Mark Roosjen, Koji Takahashi, Lesia Rodriguez
Solovey, Jack Merrin, Jian Chen, et al. “Cell Surface and Intracellular Auxin
Signalling for H+ Fluxes in Root Growth.” Nature. Springer Nature,
2021. https://doi.org/10.1038/s41586-021-04037-6.
ieee: L. Li et al., “Cell surface and intracellular auxin signalling for
H+ fluxes in root growth,” Nature, vol. 599, no. 7884. Springer
Nature, pp. 273–277, 2021.
ista: Li L, Verstraeten I, Roosjen M, Takahashi K, Rodriguez Solovey L, Merrin J,
Chen J, Shabala L, Smet W, Ren H, Vanneste S, Shabala S, De Rybel B, Weijers D,
Kinoshita T, Gray WM, Friml J. 2021. Cell surface and intracellular auxin signalling
for H+ fluxes in root growth. Nature. 599(7884), 273–277.
mla: Li, Lanxin, et al. “Cell Surface and Intracellular Auxin Signalling for H+
Fluxes in Root Growth.” Nature, vol. 599, no. 7884, Springer Nature, 2021,
pp. 273–77, doi:10.1038/s41586-021-04037-6.
short: L. Li, I. Verstraeten, M. Roosjen, K. Takahashi, L. Rodriguez Solovey, J.
Merrin, J. Chen, L. Shabala, W. Smet, H. Ren, S. Vanneste, S. Shabala, B. De Rybel,
D. Weijers, T. Kinoshita, W.M. Gray, J. Friml, Nature 599 (2021) 273–277.
date_created: 2021-11-07T23:01:25Z
date_published: 2021-11-11T00:00:00Z
date_updated: 2024-10-29T10:22:45Z
day: '11'
department:
- _id: JiFr
- _id: NanoFab
doi: 10.1038/s41586-021-04037-6
ec_funded: 1
external_id:
isi:
- '000713338100006'
pmid:
- '34707283'
intvolume: ' 599'
isi: 1
issue: '7884'
keyword:
- Multidisciplinary
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.doi.org/10.21203/rs.3.rs-266395/v3
month: '11'
oa: 1
oa_version: Preprint
page: 273-277
pmid: 1
project:
- _id: 261099A6-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '742985'
name: Tracing Evolution of Auxin Transport and Polarity in Plants
- _id: 26538374-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: I03630
name: Molecular mechanisms of endocytic cargo recognition in plants
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '665385'
name: International IST Doctoral Program
- _id: 26B4D67E-B435-11E9-9278-68D0E5697425
grant_number: '25351'
name: 'A Case Study of Plant Growth Regulation: Molecular Mechanism of Auxin-mediated
Rapid Growth Inhibition in Arabidopsis Root'
publication: Nature
publication_identifier:
eissn:
- '14764687'
issn:
- '00280836'
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
link:
- description: News on IST Webpage
relation: press_release
url: https://ist.ac.at/en/news/stop-and-grow/
record:
- id: '10095'
relation: earlier_version
status: public
scopus_import: '1'
status: public
title: Cell surface and intracellular auxin signalling for H+ fluxes in
root growth
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 599
year: '2021'
...
---
_id: '10268'
abstract:
- lang: eng
text: The analysis of dynamic cellular processes such as plant cytokinesis stands
and falls with live-cell time-lapse confocal imaging. Conventional approaches
to time-lapse imaging of cell division in Arabidopsis root tips are tedious and
have low throughput. Here, we describe a protocol for long-term time-lapse simultaneous
imaging of multiple root tips on a vertical-stage confocal microscope with automated
root tracking. We also provide modifications of the basic protocol to implement
this imaging method in the analysis of genetic, pharmacological or laser ablation
wounding-mediated experimental manipulations. Our method dramatically improves
the efficiency of cell division time-lapse imaging by increasing the throughput,
while reducing the person-hour requirements of such experiments.
acknowledged_ssus:
- _id: Bio
acknowledgement: We thank B. De Rybel for allowing M.G. to work on this manuscript
during a postdoc in his laboratory, and EMBO for supporting M.G. with a Long-Term
fellowship (ALTF 1005-2019) during this time. We acknowledge the service and support
by the Bioimaging Facility at IST Austria, and finally, we thank A. Mally for proofreading
and correcting the manuscript.
alternative_title:
- Methods in Molecular Biology
article_processing_charge: No
author:
- first_name: Lukas
full_name: Hörmayer, Lukas
id: 2EEE7A2A-F248-11E8-B48F-1D18A9856A87
last_name: Hörmayer
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Matous
full_name: Glanc, Matous
id: 1AE1EA24-02D0-11E9-9BAA-DAF4881429F2
last_name: Glanc
orcid: 0000-0003-0619-7783
citation:
ama: 'Hörmayer L, Friml J, Glanc M. Automated time-lapse imaging and manipulation
of cell divisions in Arabidopsis roots by vertical-stage confocal microscopy.
In: Plant Cell Division. Vol 2382. MIMB. Humana Press; 2021:105-114. doi:10.1007/978-1-0716-1744-1_6'
apa: Hörmayer, L., Friml, J., & Glanc, M. (2021). Automated time-lapse imaging
and manipulation of cell divisions in Arabidopsis roots by vertical-stage confocal
microscopy. In Plant Cell Division (Vol. 2382, pp. 105–114). Humana Press.
https://doi.org/10.1007/978-1-0716-1744-1_6
chicago: Hörmayer, Lukas, Jiří Friml, and Matous Glanc. “Automated Time-Lapse Imaging
and Manipulation of Cell Divisions in Arabidopsis Roots by Vertical-Stage Confocal
Microscopy.” In Plant Cell Division, 2382:105–14. MIMB. Humana Press, 2021.
https://doi.org/10.1007/978-1-0716-1744-1_6.
ieee: L. Hörmayer, J. Friml, and M. Glanc, “Automated time-lapse imaging and manipulation
of cell divisions in Arabidopsis roots by vertical-stage confocal microscopy,”
in Plant Cell Division, vol. 2382, Humana Press, 2021, pp. 105–114.
ista: 'Hörmayer L, Friml J, Glanc M. 2021.Automated time-lapse imaging and manipulation
of cell divisions in Arabidopsis roots by vertical-stage confocal microscopy.
In: Plant Cell Division. Methods in Molecular Biology, vol. 2382, 105–114.'
mla: Hörmayer, Lukas, et al. “Automated Time-Lapse Imaging and Manipulation of Cell
Divisions in Arabidopsis Roots by Vertical-Stage Confocal Microscopy.” Plant
Cell Division, vol. 2382, Humana Press, 2021, pp. 105–14, doi:10.1007/978-1-0716-1744-1_6.
short: L. Hörmayer, J. Friml, M. Glanc, in:, Plant Cell Division, Humana Press,
2021, pp. 105–114.
date_created: 2021-11-11T10:03:30Z
date_published: 2021-10-28T00:00:00Z
date_updated: 2022-06-03T06:47:06Z
day: '28'
department:
- _id: JiFr
doi: 10.1007/978-1-0716-1744-1_6
external_id:
pmid:
- '34705235'
intvolume: ' 2382'
language:
- iso: eng
month: '10'
oa_version: None
page: 105-114
pmid: 1
publication: Plant Cell Division
publication_identifier:
eisbn:
- 978-1-0716-1744-1
eissn:
- 1940-6029
isbn:
- 978-1-0716-1743-4
issn:
- 1064-3745
publication_status: published
publisher: Humana Press
quality_controlled: '1'
scopus_import: '1'
series_title: MIMB
status: public
title: Automated time-lapse imaging and manipulation of cell divisions in Arabidopsis
roots by vertical-stage confocal microscopy
type: book_chapter
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 2382
year: '2021'
...
---
_id: '10290'
abstract:
- lang: eng
text: A precise quantitative description of the ultrastructural characteristics
underlying biological mechanisms is often key to their understanding. This is
particularly true for dynamic extra- and intracellular filamentous assemblies,
playing a role in cell motility, cell integrity, cytokinesis, tissue formation
and maintenance. For example, genetic manipulation or modulation of actin regulatory
proteins frequently manifests in changes of the morphology, dynamics, and ultrastructural
architecture of actin filament-rich cell peripheral structures, such as lamellipodia
or filopodia. However, the observed ultrastructural effects often remain subtle
and require sufficiently large datasets for appropriate quantitative analysis.
The acquisition of such large datasets has been enabled by recent advances in
high-throughput cryo-electron tomography (cryo-ET) methods. This also necessitates
the development of complementary approaches to maximize the extraction of relevant
biological information. We have developed a computational toolbox for the semi-automatic
quantification of segmented and vectorized filamentous networks from pre-processed
cryo-electron tomograms, facilitating the analysis and cross-comparison of multiple
experimental conditions. GUI-based components simplify the processing of data
and allow users to obtain a large number of ultrastructural parameters describing
filamentous assemblies. We demonstrate the feasibility of this workflow by analyzing
cryo-ET data of untreated and chemically perturbed branched actin filament networks
and that of parallel actin filament arrays. In principle, the computational toolbox
presented here is applicable for data analysis comprising any type of filaments
in regular (i.e. parallel) or random arrangement. We show that it can ease the
identification of key differences between experimental groups and facilitate the
in-depth analysis of ultrastructural data in a time-efficient manner.
acknowledged_ssus:
- _id: ScienComp
- _id: LifeSc
- _id: Bio
- _id: EM-Fac
acknowledgement: 'This research was supported by the Scientific Service Units (SSUs)
of IST Austria through resources provided by Scientific Computing (SciComp), the
Life Science Facility (LSF), the BioImaging Facility (BIF), and the Electron Microscopy
Facility (EMF). We also thank Victor-Valentin Hodirnau for help with cryo-ET data
acquisition. The authors acknowledge support from IST Austria and from the Austrian
Science Fund (FWF): M02495 to G.D. and Austrian Science Fund (FWF): P33367 to F.K.M.S.'
article_number: '107808'
article_processing_charge: Yes (via OA deal)
article_type: original
author:
- first_name: Georgi A
full_name: Dimchev, Georgi A
id: 38C393BE-F248-11E8-B48F-1D18A9856A87
last_name: Dimchev
orcid: 0000-0001-8370-6161
- first_name: Behnam
full_name: Amiri, Behnam
last_name: Amiri
- first_name: Florian
full_name: Fäßler, Florian
id: 404F5528-F248-11E8-B48F-1D18A9856A87
last_name: Fäßler
orcid: 0000-0001-7149-769X
- first_name: Martin
full_name: Falcke, Martin
last_name: Falcke
- first_name: Florian KM
full_name: Schur, Florian KM
id: 48AD8942-F248-11E8-B48F-1D18A9856A87
last_name: Schur
orcid: 0000-0003-4790-8078
citation:
ama: Dimchev GA, Amiri B, Fäßler F, Falcke M, Schur FK. Computational toolbox for
ultrastructural quantitative analysis of filament networks in cryo-ET data. Journal
of Structural Biology. 2021;213(4). doi:10.1016/j.jsb.2021.107808
apa: Dimchev, G. A., Amiri, B., Fäßler, F., Falcke, M., & Schur, F. K. (2021).
Computational toolbox for ultrastructural quantitative analysis of filament networks
in cryo-ET data. Journal of Structural Biology. Elsevier . https://doi.org/10.1016/j.jsb.2021.107808
chicago: Dimchev, Georgi A, Behnam Amiri, Florian Fäßler, Martin Falcke, and Florian
KM Schur. “Computational Toolbox for Ultrastructural Quantitative Analysis of
Filament Networks in Cryo-ET Data.” Journal of Structural Biology. Elsevier
, 2021. https://doi.org/10.1016/j.jsb.2021.107808.
ieee: G. A. Dimchev, B. Amiri, F. Fäßler, M. Falcke, and F. K. Schur, “Computational
toolbox for ultrastructural quantitative analysis of filament networks in cryo-ET
data,” Journal of Structural Biology, vol. 213, no. 4. Elsevier , 2021.
ista: Dimchev GA, Amiri B, Fäßler F, Falcke M, Schur FK. 2021. Computational toolbox
for ultrastructural quantitative analysis of filament networks in cryo-ET data.
Journal of Structural Biology. 213(4), 107808.
mla: Dimchev, Georgi A., et al. “Computational Toolbox for Ultrastructural Quantitative
Analysis of Filament Networks in Cryo-ET Data.” Journal of Structural Biology,
vol. 213, no. 4, 107808, Elsevier , 2021, doi:10.1016/j.jsb.2021.107808.
short: G.A. Dimchev, B. Amiri, F. Fäßler, M. Falcke, F.K. Schur, Journal of Structural
Biology 213 (2021).
date_created: 2021-11-15T12:21:42Z
date_published: 2021-11-03T00:00:00Z
date_updated: 2023-11-21T08:36:02Z
day: '03'
ddc:
- '572'
department:
- _id: FlSc
doi: 10.1016/j.jsb.2021.107808
external_id:
isi:
- '000720259500002'
file:
- access_level: open_access
checksum: 6b209e4d44775d4e02b50f78982c15fa
content_type: application/pdf
creator: cchlebak
date_created: 2021-11-15T13:11:27Z
date_updated: 2021-11-15T13:11:27Z
file_id: '10291'
file_name: 2021_JournalStructBiol_Dimchev.pdf
file_size: 16818304
relation: main_file
success: 1
file_date_updated: 2021-11-15T13:11:27Z
has_accepted_license: '1'
intvolume: ' 213'
isi: 1
issue: '4'
keyword:
- Structural Biology
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
project:
- _id: 9B954C5C-BA93-11EA-9121-9846C619BF3A
grant_number: P33367
name: Structure and isoform diversity of the Arp2/3 complex
- _id: 2674F658-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: M02495
name: Protein structure and function in filopodia across scales
publication: Journal of Structural Biology
publication_identifier:
issn:
- 1047-8477
publication_status: published
publisher: 'Elsevier '
quality_controlled: '1'
related_material:
record:
- id: '14502'
relation: software
status: public
scopus_import: '1'
status: public
title: Computational toolbox for ultrastructural quantitative analysis of filament
networks in cryo-ET data
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 213
year: '2021'
...
---
_id: '10303'
abstract:
- lang: eng
text: 'Nitrogen is an essential macronutrient determining plant growth, development
and affecting agricultural productivity. Root, as a hub that perceives and integrates
local and systemic signals on the plant’s external and endogenous nitrogen resources,
communicates with other plant organs to consolidate their physiology and development
in accordance with actual nitrogen balance. Over the last years, numerous studies
demonstrated that these comprehensive developmental adaptations rely on the interaction
between pathways controlling nitrogen homeostasis and hormonal networks acting
globally in the plant body. However, molecular insights into how the information
about the nitrogen status is translated through hormonal pathways into specific
developmental output are lacking. In my work, I addressed so far poorly understood
mechanisms underlying root-to-shoot communication that lead to a rapid re-adjustment
of shoot growth and development after nitrate provision. Applying a combination
of molecular, cell, and developmental biology approaches, genetics and grafting
experiments as well as hormonal analytics, I identified and characterized an unknown
molecular framework orchestrating shoot development with a root nitrate sensory
system. '
acknowledged_ssus:
- _id: LifeSc
- _id: Bio
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Rashed
full_name: Abualia, Rashed
id: 4827E134-F248-11E8-B48F-1D18A9856A87
last_name: Abualia
orcid: 0000-0002-9357-9415
citation:
ama: Abualia R. Role of hormones in nitrate regulated growth. 2021. doi:10.15479/at:ista:10303
apa: Abualia, R. (2021). Role of hormones in nitrate regulated growth. Institute
of Science and Technology Austria. https://doi.org/10.15479/at:ista:10303
chicago: Abualia, Rashed. “Role of Hormones in Nitrate Regulated Growth.” Institute
of Science and Technology Austria, 2021. https://doi.org/10.15479/at:ista:10303.
ieee: R. Abualia, “Role of hormones in nitrate regulated growth,” Institute of Science
and Technology Austria, 2021.
ista: Abualia R. 2021. Role of hormones in nitrate regulated growth. Institute of
Science and Technology Austria.
mla: Abualia, Rashed. Role of Hormones in Nitrate Regulated Growth. Institute
of Science and Technology Austria, 2021, doi:10.15479/at:ista:10303.
short: R. Abualia, Role of Hormones in Nitrate Regulated Growth, Institute of Science
and Technology Austria, 2021.
date_created: 2021-11-18T11:20:59Z
date_published: 2021-11-22T00:00:00Z
date_updated: 2023-09-19T14:42:45Z
day: '22'
ddc:
- '580'
- '581'
degree_awarded: PhD
department:
- _id: GradSch
- _id: EvBe
doi: 10.15479/at:ista:10303
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creator: rabualia
date_created: 2021-11-22T14:48:34Z
date_updated: 2022-12-20T23:30:06Z
embargo_to: open_access
file_id: '10332'
file_name: AbualiaPhDthesisfinalv3.docx
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file_date_updated: 2022-12-20T23:30:06Z
has_accepted_license: '1'
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
page: '139'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '9010'
relation: part_of_dissertation
status: public
- id: '9913'
relation: part_of_dissertation
status: public
- id: '47'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Eva
full_name: Benková, Eva
id: 38F4F166-F248-11E8-B48F-1D18A9856A87
last_name: Benková
orcid: 0000-0002-8510-9739
title: Role of hormones in nitrate regulated growth
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2021'
...
---
_id: '10307'
abstract:
- lang: eng
text: Bacteria-host interactions represent a continuous trade-off between benefit
and risk. Thus, the host immune response is faced with a non-trivial problem –
accommodate beneficial commensals and remove harmful pathogens. This is especially
difficult as molecular patterns, such as lipopolysaccharide or specific surface
organelles such as pili, are conserved in both, commensal and pathogenic bacteria.
Type 1 pili, tightly regulated by phase variation, are considered an important
virulence factor of pathogenic bacteria as they facilitate invasion into host
cells. While invasion represents a de facto passive mechanism for pathogens to
escape the host immune response, we demonstrate a fundamental role of type 1 pili
as active modulators of the innate and adaptive immune response.
acknowledged_ssus:
- _id: LifeSc
- _id: Bio
- _id: PreCl
- _id: EM-Fac
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Kathrin
full_name: Tomasek, Kathrin
id: 3AEC8556-F248-11E8-B48F-1D18A9856A87
last_name: Tomasek
orcid: 0000-0003-3768-877X
citation:
ama: Tomasek K. Pathogenic Escherichia coli hijack the host immune response. 2021.
doi:10.15479/at:ista:10307
apa: Tomasek, K. (2021). Pathogenic Escherichia coli hijack the host immune response.
Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:10307
chicago: Tomasek, Kathrin. “Pathogenic Escherichia Coli Hijack the Host Immune Response.”
Institute of Science and Technology Austria, 2021. https://doi.org/10.15479/at:ista:10307.
ieee: K. Tomasek, “Pathogenic Escherichia coli hijack the host immune response,”
Institute of Science and Technology Austria, 2021.
ista: Tomasek K. 2021. Pathogenic Escherichia coli hijack the host immune response.
Institute of Science and Technology Austria.
mla: Tomasek, Kathrin. Pathogenic Escherichia Coli Hijack the Host Immune Response.
Institute of Science and Technology Austria, 2021, doi:10.15479/at:ista:10307.
short: K. Tomasek, Pathogenic Escherichia Coli Hijack the Host Immune Response,
Institute of Science and Technology Austria, 2021.
date_created: 2021-11-18T15:05:06Z
date_published: 2021-11-18T00:00:00Z
date_updated: 2023-09-07T13:34:38Z
day: '18'
ddc:
- '570'
degree_awarded: PhD
department:
- _id: MiSi
- _id: CaGu
- _id: GradSch
doi: 10.15479/at:ista:10307
file:
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checksum: b39c9e0ef18d0484d537a67551effd02
content_type: application/pdf
creator: ktomasek
date_created: 2021-11-18T15:07:31Z
date_updated: 2022-12-20T23:30:05Z
embargo: 2022-11-18
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file_size: 13266088
relation: main_file
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content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
creator: ktomasek
date_created: 2021-11-18T15:07:46Z
date_updated: 2022-12-20T23:30:05Z
embargo_to: open_access
file_id: '10309'
file_name: ThesisTomasekKathrin.docx
file_size: 7539509
relation: source_file
file_date_updated: 2022-12-20T23:30:05Z
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language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
page: '73'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '10316'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Michael K
full_name: Sixt, Michael K
id: 41E9FBEA-F248-11E8-B48F-1D18A9856A87
last_name: Sixt
orcid: 0000-0002-4561-241X
- first_name: Calin C
full_name: Guet, Calin C
id: 47F8433E-F248-11E8-B48F-1D18A9856A87
last_name: Guet
orcid: 0000-0001-6220-2052
title: Pathogenic Escherichia coli hijack the host immune response
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2021'
...
---
_id: '10316'
abstract:
- lang: eng
text: A key attribute of persistent or recurring bacterial infections is the ability
of the pathogen to evade the host’s immune response. Many Enterobacteriaceae express
type 1 pili, a pre-adapted virulence trait, to invade host epithelial cells and
establish persistent infections. However, the molecular mechanisms and strategies
by which bacteria actively circumvent the immune response of the host remain poorly
understood. Here, we identified CD14, the major co-receptor for lipopolysaccharide
detection, on dendritic cells as a previously undescribed binding partner of FimH,
the protein located at the tip of the type 1 pilus of Escherichia coli. The FimH
amino acids involved in CD14 binding are highly conserved across pathogenic and
non-pathogenic strains. Binding of pathogenic bacteria to CD14 lead to reduced
dendritic cell migration and blunted expression of co-stimulatory molecules, both
rate-limiting factors of T cell activation. While defining an active molecular
mechanism of immune evasion by pathogens, the interaction between FimH and CD14
represents a potential target to interfere with persistent and recurrent infections,
such as urinary tract infections or Crohn’s disease.
acknowledged_ssus:
- _id: Bio
- _id: PreCl
- _id: EM-Fac
acknowledgement: We thank Ulrich Dobrindt for providing UPEC strain CFT073, Vlad Gavra
and Maximilian Götz, Bor Kavčič, Jonna Alanko and Eva Kiermaier for help with experiments
and Robert Hauschild, Julian Stopp and Saren Tasciyan for help with data analysis.
We thank the IST Austria Scientific Service Units, especially the Bioimaging facility,
the Preclinical facility and the Electron microscopy facility for technical support,
Jakob Wallner and all members of the Guet and Sixt lab for fruitful discussions
and Daria Siekhaus for critically reading the manuscript. This work was supported
by grants from the Austrian Research Promotion Agency (FEMtech 868984) to I.G.,
the European Research Council (CoG 724373) and the Austrian Science Fund (FWF P29911)
to M.S.
article_processing_charge: No
author:
- first_name: Kathrin
full_name: Tomasek, Kathrin
id: 3AEC8556-F248-11E8-B48F-1D18A9856A87
last_name: Tomasek
orcid: 0000-0003-3768-877X
- first_name: Alexander F
full_name: Leithner, Alexander F
id: 3B1B77E4-F248-11E8-B48F-1D18A9856A87
last_name: Leithner
orcid: 0000-0002-1073-744X
- first_name: Ivana
full_name: Glatzová, Ivana
id: 727b3c7d-4939-11ec-89b3-b9b0750ab74d
last_name: Glatzová
- first_name: Michael S.
full_name: Lukesch, Michael S.
last_name: Lukesch
- first_name: Calin C
full_name: Guet, Calin C
id: 47F8433E-F248-11E8-B48F-1D18A9856A87
last_name: Guet
orcid: 0000-0001-6220-2052
- first_name: Michael K
full_name: Sixt, Michael K
id: 41E9FBEA-F248-11E8-B48F-1D18A9856A87
last_name: Sixt
orcid: 0000-0002-4561-241X
citation:
ama: Tomasek K, Leithner AF, Glatzová I, Lukesch MS, Guet CC, Sixt MK. Type 1 piliated
uropathogenic Escherichia coli hijack the host immune response by binding to CD14.
bioRxiv. doi:10.1101/2021.10.18.464770
apa: Tomasek, K., Leithner, A. F., Glatzová, I., Lukesch, M. S., Guet, C. C., &
Sixt, M. K. (n.d.). Type 1 piliated uropathogenic Escherichia coli hijack the
host immune response by binding to CD14. bioRxiv. Cold Spring Harbor Laboratory.
https://doi.org/10.1101/2021.10.18.464770
chicago: Tomasek, Kathrin, Alexander F Leithner, Ivana Glatzová, Michael S. Lukesch,
Calin C Guet, and Michael K Sixt. “Type 1 Piliated Uropathogenic Escherichia Coli
Hijack the Host Immune Response by Binding to CD14.” BioRxiv. Cold Spring
Harbor Laboratory, n.d. https://doi.org/10.1101/2021.10.18.464770.
ieee: K. Tomasek, A. F. Leithner, I. Glatzová, M. S. Lukesch, C. C. Guet, and M.
K. Sixt, “Type 1 piliated uropathogenic Escherichia coli hijack the host immune
response by binding to CD14,” bioRxiv. Cold Spring Harbor Laboratory.
ista: Tomasek K, Leithner AF, Glatzová I, Lukesch MS, Guet CC, Sixt MK. Type 1 piliated
uropathogenic Escherichia coli hijack the host immune response by binding to CD14.
bioRxiv, 10.1101/2021.10.18.464770.
mla: Tomasek, Kathrin, et al. “Type 1 Piliated Uropathogenic Escherichia Coli Hijack
the Host Immune Response by Binding to CD14.” BioRxiv, Cold Spring Harbor
Laboratory, doi:10.1101/2021.10.18.464770.
short: K. Tomasek, A.F. Leithner, I. Glatzová, M.S. Lukesch, C.C. Guet, M.K. Sixt,
BioRxiv (n.d.).
date_created: 2021-11-19T12:24:16Z
date_published: 2021-10-18T00:00:00Z
date_updated: 2024-03-25T23:30:19Z
day: '18'
department:
- _id: CaGu
- _id: MiSi
doi: 10.1101/2021.10.18.464770
ec_funded: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.biorxiv.org/content/10.1101/2021.10.18.464770v1
month: '10'
oa: 1
oa_version: Preprint
project:
- _id: 25FE9508-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '724373'
name: Cellular navigation along spatial gradients
- _id: 26018E70-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P29911
name: Mechanical adaptation of lamellipodial actin
publication: bioRxiv
publication_status: submitted
publisher: Cold Spring Harbor Laboratory
related_material:
record:
- id: '11843'
relation: later_version
status: public
- id: '10307'
relation: dissertation_contains
status: public
status: public
title: Type 1 piliated uropathogenic Escherichia coli hijack the host immune response
by binding to CD14
type: preprint
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
year: '2021'
...
---
_id: '10321'
abstract:
- lang: eng
text: Mosaic analysis with double markers (MADM) technology enables the generation
of genetic mosaic tissue in mice. MADM enables concomitant fluorescent cell labeling
and introduction of a mutation of a gene of interest with single-cell resolution.
This protocol highlights major steps for the generation of genetic mosaic tissue
and the isolation and processing of respective tissues for downstream histological
analysis. For complete details on the use and execution of this protocol, please
refer to Contreras et al. (2021).
acknowledged_ssus:
- _id: Bio
- _id: PreCl
acknowledgement: This research was supported by the Scientific Service Units (SSU)
at IST Austria through resources provided by the Bioimaging (BIF) and Preclinical
Facilities (PCF). We particularly thank Mohammad Goudarzi for assistance with photography
of mouse perfusion and dissection. N.A. received support from FWF Firnberg-Programm
(T 1031). This work was also supported by IST Austria institutional funds; FWF SFB
F78 to S.H.; and the European Research Council (ERC) under the European Union’s
Horizon 2020 research and innovation programme (grant agreement no. 725780 LinPro)
to S.H.
article_number: '100939'
article_processing_charge: Yes
article_type: original
author:
- first_name: Nicole
full_name: Amberg, Nicole
id: 4CD6AAC6-F248-11E8-B48F-1D18A9856A87
last_name: Amberg
orcid: 0000-0002-3183-8207
- first_name: Simon
full_name: Hippenmeyer, Simon
id: 37B36620-F248-11E8-B48F-1D18A9856A87
last_name: Hippenmeyer
orcid: 0000-0003-2279-1061
citation:
ama: Amberg N, Hippenmeyer S. Genetic mosaic dissection of candidate genes in mice
using mosaic analysis with double markers. STAR Protocols. 2021;2(4). doi:10.1016/j.xpro.2021.100939
apa: Amberg, N., & Hippenmeyer, S. (2021). Genetic mosaic dissection of candidate
genes in mice using mosaic analysis with double markers. STAR Protocols.
Cell Press. https://doi.org/10.1016/j.xpro.2021.100939
chicago: Amberg, Nicole, and Simon Hippenmeyer. “Genetic Mosaic Dissection of Candidate
Genes in Mice Using Mosaic Analysis with Double Markers.” STAR Protocols.
Cell Press, 2021. https://doi.org/10.1016/j.xpro.2021.100939.
ieee: N. Amberg and S. Hippenmeyer, “Genetic mosaic dissection of candidate genes
in mice using mosaic analysis with double markers,” STAR Protocols, vol.
2, no. 4. Cell Press, 2021.
ista: Amberg N, Hippenmeyer S. 2021. Genetic mosaic dissection of candidate genes
in mice using mosaic analysis with double markers. STAR Protocols. 2(4), 100939.
mla: Amberg, Nicole, and Simon Hippenmeyer. “Genetic Mosaic Dissection of Candidate
Genes in Mice Using Mosaic Analysis with Double Markers.” STAR Protocols,
vol. 2, no. 4, 100939, Cell Press, 2021, doi:10.1016/j.xpro.2021.100939.
short: N. Amberg, S. Hippenmeyer, STAR Protocols 2 (2021).
date_created: 2021-11-21T23:01:28Z
date_published: 2021-11-10T00:00:00Z
date_updated: 2023-11-16T13:08:03Z
day: '10'
ddc:
- '573'
department:
- _id: SiHi
doi: 10.1016/j.xpro.2021.100939
ec_funded: 1
file:
- access_level: open_access
checksum: 9e3f6d06bf583e7a8b6a9e9a60500a28
content_type: application/pdf
creator: cchlebak
date_created: 2021-11-22T08:23:58Z
date_updated: 2021-11-22T08:23:58Z
file_id: '10329'
file_name: 2021_STARProtocols_Amberg.pdf
file_size: 7309464
relation: main_file
success: 1
file_date_updated: 2021-11-22T08:23:58Z
has_accepted_license: '1'
intvolume: ' 2'
issue: '4'
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
project:
- _id: 260018B0-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '725780'
name: Principles of Neural Stem Cell Lineage Progression in Cerebral Cortex Development
- _id: 268F8446-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: T0101031
name: Role of Eed in neural stem cell lineage progression
- _id: 059F6AB4-7A3F-11EA-A408-12923DDC885E
grant_number: F07805
name: Molecular Mechanisms of Neural Stem Cell Lineage Progression
publication: STAR Protocols
publication_identifier:
eissn:
- 2666-1667
publication_status: published
publisher: Cell Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Genetic mosaic dissection of candidate genes in mice using mosaic analysis
with double markers
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 2
year: '2021'
...
---
_id: '10565'
abstract:
- lang: eng
text: 'Enzymatic digestion of the extracellular matrix with chondroitinase-ABC reinstates
juvenile-like plasticity in the adult cortex as it also disassembles the perineuronal
nets (PNNs). The disadvantage of the enzyme is that it must be applied intracerebrally
and it degrades the ECM for several weeks. Here, we provide two minimally invasive
and transient protocols for microglia-enabled PNN disassembly in mouse cortex:
repeated treatment with ketamine-xylazine-acepromazine (KXA) anesthesia and 60-Hz
light entrainment. We also discuss how to analyze PNNs within microglial endosomes-lysosomes.
For complete details on the use and execution of this protocol, please refer to
Venturino et al. (2021).'
acknowledged_ssus:
- _id: Bio
acknowledgement: This research was supported by the European Research Council (grant
715571 to S.S.). We thank Rouven Schulz, Michael Schunn, Claudia Gold, Gabriel Krens,
Sarah Gorkiewicz, Margaret Maes, Jürgen Siegert, Marco Benevento, and Sara Oakeley
for comments on the manuscript and the IST Austria Bioimaging Facility for the technical
support.
article_number: '101012'
article_processing_charge: Yes
article_type: original
author:
- first_name: Alessandro
full_name: Venturino, Alessandro
id: 41CB84B2-F248-11E8-B48F-1D18A9856A87
last_name: Venturino
orcid: 0000-0003-2356-9403
- first_name: Sandra
full_name: Siegert, Sandra
id: 36ACD32E-F248-11E8-B48F-1D18A9856A87
last_name: Siegert
orcid: 0000-0001-8635-0877
citation:
ama: Venturino A, Siegert S. Minimally invasive protocols and quantification for
microglia-mediated perineuronal net disassembly in mouse brain. STAR Protocols.
2021;2(4). doi:10.1016/j.xpro.2021.101012
apa: Venturino, A., & Siegert, S. (2021). Minimally invasive protocols and quantification
for microglia-mediated perineuronal net disassembly in mouse brain. STAR Protocols.
Elsevier ; Cell Press. https://doi.org/10.1016/j.xpro.2021.101012
chicago: Venturino, Alessandro, and Sandra Siegert. “Minimally Invasive Protocols
and Quantification for Microglia-Mediated Perineuronal Net Disassembly in Mouse
Brain.” STAR Protocols. Elsevier ; Cell Press, 2021. https://doi.org/10.1016/j.xpro.2021.101012.
ieee: A. Venturino and S. Siegert, “Minimally invasive protocols and quantification
for microglia-mediated perineuronal net disassembly in mouse brain,” STAR Protocols,
vol. 2, no. 4. Elsevier ; Cell Press, 2021.
ista: Venturino A, Siegert S. 2021. Minimally invasive protocols and quantification
for microglia-mediated perineuronal net disassembly in mouse brain. STAR Protocols.
2(4), 101012.
mla: Venturino, Alessandro, and Sandra Siegert. “Minimally Invasive Protocols and
Quantification for Microglia-Mediated Perineuronal Net Disassembly in Mouse Brain.”
STAR Protocols, vol. 2, no. 4, 101012, Elsevier ; Cell Press, 2021, doi:10.1016/j.xpro.2021.101012.
short: A. Venturino, S. Siegert, STAR Protocols 2 (2021).
date_created: 2021-12-19T23:01:32Z
date_published: 2021-12-17T00:00:00Z
date_updated: 2023-11-16T13:11:04Z
day: '17'
ddc:
- '573'
department:
- _id: SaSi
doi: 10.1016/j.xpro.2021.101012
ec_funded: 1
file:
- access_level: open_access
checksum: 9ea2501056c5df99e84726b845e9b976
content_type: application/pdf
creator: cchlebak
date_created: 2021-12-20T08:58:40Z
date_updated: 2021-12-20T08:58:40Z
file_id: '10570'
file_name: 2021_STARProt_Venturino.pdf
file_size: 6207060
relation: main_file
success: 1
file_date_updated: 2021-12-20T08:58:40Z
has_accepted_license: '1'
intvolume: ' 2'
issue: '4'
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
project:
- _id: 25D4A630-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '715571'
name: Microglia action towards neuronal circuit formation and function in health
and disease
publication: STAR Protocols
publication_identifier:
eissn:
- 2666-1667
publication_status: published
publisher: Elsevier ; Cell Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Minimally invasive protocols and quantification for microglia-mediated perineuronal
net disassembly in mouse brain
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 2
year: '2021'
...
---
_id: '10606'
abstract:
- lang: eng
text: Cell division orientation is thought to result from a competition between
cell geometry and polarity domains controlling the position of the mitotic spindle
during mitosis. Depending on the level of cell shape anisotropy or the strength
of the polarity domain, one dominates the other and determines the orientation
of the spindle. Whether and how such competition is also at work to determine
unequal cell division (UCD), producing daughter cells of different size, remains
unclear. Here, we show that cell geometry and polarity domains cooperate, rather
than compete, in positioning the cleavage plane during UCDs in early ascidian
embryos. We found that the UCDs and their orientation at the ascidian third cleavage
rely on the spindle tilting in an anisotropic cell shape, and cortical polarity
domains exerting different effects on spindle astral microtubules. By systematically
varying mitotic cell shape, we could modulate the effect of attractive and repulsive
polarity domains and consequently generate predicted daughter cell size asymmetries
and position. We therefore propose that the spindle position during UCD is set
by the combined activities of cell geometry and polarity domains, where cell geometry
modulates the effect of cortical polarity domain(s).
acknowledged_ssus:
- _id: NanoFab
- _id: Bio
acknowledgement: 'We thank members of the Heisenberg and McDougall groups for technical
advice and discussion. We are grateful to the Bioimaging and Nanofabrication facilities
of IST Austria and the Imaging Platform (PIM) and animal facility (CRB) of Institut
de la Mer de Villefranche (IMEV), which is supported by EMBRC-France, whose French
state funds are managed by the ANR within the Investments of the Future program
under reference ANR-10-INBS-0, for continuous support. This work was supported by
a collaborative grant from the French Government funding agency Agence National
de la Recherche to McDougall (ANR ''MorCell'': ANR-17-CE 13-0028) and the Austrian
Science Fund to Heisenberg (FWF: I 3601-B27).'
article_number: e75639
article_processing_charge: No
article_type: original
author:
- first_name: Benoit G
full_name: Godard, Benoit G
id: 33280250-F248-11E8-B48F-1D18A9856A87
last_name: Godard
- first_name: Remi
full_name: Dumollard, Remi
last_name: Dumollard
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
- first_name: Alex
full_name: Mcdougall, Alex
last_name: Mcdougall
citation:
ama: Godard BG, Dumollard R, Heisenberg C-PJ, Mcdougall A. Combined effect of cell
geometry and polarity domains determines the orientation of unequal division.
eLife. 2021;10. doi:10.7554/eLife.75639
apa: Godard, B. G., Dumollard, R., Heisenberg, C.-P. J., & Mcdougall, A. (2021).
Combined effect of cell geometry and polarity domains determines the orientation
of unequal division. ELife. eLife Sciences Publications. https://doi.org/10.7554/eLife.75639
chicago: Godard, Benoit G, Remi Dumollard, Carl-Philipp J Heisenberg, and Alex Mcdougall.
“Combined Effect of Cell Geometry and Polarity Domains Determines the Orientation
of Unequal Division.” ELife. eLife Sciences Publications, 2021. https://doi.org/10.7554/eLife.75639.
ieee: B. G. Godard, R. Dumollard, C.-P. J. Heisenberg, and A. Mcdougall, “Combined
effect of cell geometry and polarity domains determines the orientation of unequal
division,” eLife, vol. 10. eLife Sciences Publications, 2021.
ista: Godard BG, Dumollard R, Heisenberg C-PJ, Mcdougall A. 2021. Combined effect
of cell geometry and polarity domains determines the orientation of unequal division.
eLife. 10, e75639.
mla: Godard, Benoit G., et al. “Combined Effect of Cell Geometry and Polarity Domains
Determines the Orientation of Unequal Division.” ELife, vol. 10, e75639,
eLife Sciences Publications, 2021, doi:10.7554/eLife.75639.
short: B.G. Godard, R. Dumollard, C.-P.J. Heisenberg, A. Mcdougall, ELife 10 (2021).
date_created: 2022-01-09T23:01:26Z
date_published: 2021-12-21T00:00:00Z
date_updated: 2023-08-17T06:32:44Z
day: '21'
ddc:
- '570'
department:
- _id: CaHe
doi: 10.7554/eLife.75639
external_id:
isi:
- '000733610100001'
file:
- access_level: open_access
checksum: 759c7a873d554c48a6639e6350746ca6
content_type: application/pdf
creator: alisjak
date_created: 2022-01-10T09:40:37Z
date_updated: 2022-01-10T09:40:37Z
file_id: '10611'
file_name: 2021_eLife_Godard.pdf
file_size: 7769934
relation: main_file
success: 1
file_date_updated: 2022-01-10T09:40:37Z
has_accepted_license: '1'
intvolume: ' 10'
isi: 1
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
project:
- _id: 2646861A-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: I03601
name: Control of embryonic cleavage pattern
publication: eLife
publication_identifier:
eissn:
- 2050-084X
publication_status: published
publisher: eLife Sciences Publications
quality_controlled: '1'
scopus_import: '1'
status: public
title: Combined effect of cell geometry and polarity domains determines the orientation
of unequal division
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 10
year: '2021'
...
---
_id: '10655'
abstract:
- lang: eng
text: "Adeno-associated viruses (AAVs) are widely used to deliver genetic material
in vivo to distinct cell types such as neurons or glial cells, allowing for targeted
manipulation. Transduction of microglia is mostly excluded from this strategy,
likely due to the cells’ heterogeneous state upon environmental changes, which
makes AAV design challenging. Here, we established the retina as a model system
for microglial AAV validation and optimization. First, we show that AAV2/6 transduced
microglia in both synaptic layers, where layer preference corresponds to the intravitreal
or subretinal delivery method. Surprisingly, we observed significantly enhanced
microglial transduction during photoreceptor degeneration. Thus, we modified the
AAV6 capsid to reduce heparin binding by introducing four point mutations (K531E,
R576Q, K493S, and K459S), resulting in increased microglial transduction in the
outer plexiform layer. Finally, to improve microglial-specific transduction, we
validated a Cre-dependent transgene delivery cassette for use in combination with
the Cx3cr1CreERT2 mouse line. Together, our results provide a foundation for future
studies optimizing AAV-mediated microglia transduction and highlight that environmental
conditions influence microglial transduction efficiency.\r\n"
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
- _id: PreCl
acknowledgement: This project has received funding from the European Research Council
(ERC) under the European Union’s Horizon 2020 research and innovation programme
(grant agreement no. 715571). The research was supported by the Scientific Service
Units (SSU) of IST Austria through resources provided by the Bioimaging Facility,
the Life Science Facility, and the Pre-Clinical Facility, namely Sonja Haslinger
and Michael Schunn for their animal colony management and support. We would also
like to thank Chakrabarty Lab for sharing the plasmids for AAV2/6 production. Finally,
we would like to thank the Siegert team members for discussion about the manuscript.
article_processing_charge: Yes
article_type: original
author:
- first_name: Margaret E
full_name: Maes, Margaret E
id: 3838F452-F248-11E8-B48F-1D18A9856A87
last_name: Maes
orcid: 0000-0001-9642-1085
- first_name: Gabriele M.
full_name: Wögenstein, Gabriele M.
last_name: Wögenstein
- first_name: Gloria
full_name: Colombo, Gloria
id: 3483CF6C-F248-11E8-B48F-1D18A9856A87
last_name: Colombo
orcid: 0000-0001-9434-8902
- first_name: Raquel
full_name: Casado Polanco, Raquel
id: 15240fc1-dbcd-11ea-9d1d-ac5a786425fd
last_name: Casado Polanco
orcid: 0000-0001-8293-4568
- first_name: Sandra
full_name: Siegert, Sandra
id: 36ACD32E-F248-11E8-B48F-1D18A9856A87
last_name: Siegert
orcid: 0000-0001-8635-0877
citation:
ama: Maes ME, Wögenstein GM, Colombo G, Casado Polanco R, Siegert S. Optimizing
AAV2/6 microglial targeting identified enhanced efficiency in the photoreceptor
degenerative environment. Molecular Therapy - Methods and Clinical Development.
2021;23:210-224. doi:10.1016/j.omtm.2021.09.006
apa: Maes, M. E., Wögenstein, G. M., Colombo, G., Casado Polanco, R., & Siegert,
S. (2021). Optimizing AAV2/6 microglial targeting identified enhanced efficiency
in the photoreceptor degenerative environment. Molecular Therapy - Methods
and Clinical Development. Elsevier. https://doi.org/10.1016/j.omtm.2021.09.006
chicago: Maes, Margaret E, Gabriele M. Wögenstein, Gloria Colombo, Raquel Casado
Polanco, and Sandra Siegert. “Optimizing AAV2/6 Microglial Targeting Identified
Enhanced Efficiency in the Photoreceptor Degenerative Environment.” Molecular
Therapy - Methods and Clinical Development. Elsevier, 2021. https://doi.org/10.1016/j.omtm.2021.09.006.
ieee: M. E. Maes, G. M. Wögenstein, G. Colombo, R. Casado Polanco, and S. Siegert,
“Optimizing AAV2/6 microglial targeting identified enhanced efficiency in the
photoreceptor degenerative environment,” Molecular Therapy - Methods and Clinical
Development, vol. 23. Elsevier, pp. 210–224, 2021.
ista: Maes ME, Wögenstein GM, Colombo G, Casado Polanco R, Siegert S. 2021. Optimizing
AAV2/6 microglial targeting identified enhanced efficiency in the photoreceptor
degenerative environment. Molecular Therapy - Methods and Clinical Development.
23, 210–224.
mla: Maes, Margaret E., et al. “Optimizing AAV2/6 Microglial Targeting Identified
Enhanced Efficiency in the Photoreceptor Degenerative Environment.” Molecular
Therapy - Methods and Clinical Development, vol. 23, Elsevier, 2021, pp. 210–24,
doi:10.1016/j.omtm.2021.09.006.
short: M.E. Maes, G.M. Wögenstein, G. Colombo, R. Casado Polanco, S. Siegert, Molecular
Therapy - Methods and Clinical Development 23 (2021) 210–224.
date_created: 2022-01-23T23:01:28Z
date_published: 2021-12-10T00:00:00Z
date_updated: 2023-11-16T13:12:03Z
day: '10'
ddc:
- '570'
department:
- _id: SaSi
- _id: SiHi
doi: 10.1016/j.omtm.2021.09.006
ec_funded: 1
external_id:
isi:
- '000748748500019'
file:
- access_level: open_access
checksum: 77dc540e8011c5475031bdf6ccef20a6
content_type: application/pdf
creator: cchlebak
date_created: 2022-01-24T07:43:09Z
date_updated: 2022-01-24T07:43:09Z
file_id: '10657'
file_name: 2021_MolTherMethodsClinDev_Maes.pdf
file_size: 4794147
relation: main_file
success: 1
file_date_updated: 2022-01-24T07:43:09Z
has_accepted_license: '1'
intvolume: ' 23'
isi: 1
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
page: 210-224
project:
- _id: 25D4A630-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '715571'
name: Microglia action towards neuronal circuit formation and function in health
and disease
publication: Molecular Therapy - Methods and Clinical Development
publication_identifier:
eissn:
- 2329-0501
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: Optimizing AAV2/6 microglial targeting identified enhanced efficiency in the
photoreceptor degenerative environment
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 23
year: '2021'
...
---
_id: '9603'
abstract:
- lang: eng
text: Mosaic analysis with double markers (MADM) offers one approach to visualize
and concomitantly manipulate genetically defined cells in mice with single-cell
resolution. MADM applications include the analysis of lineage, single-cell morphology
and physiology, genomic imprinting phenotypes, and dissection of cell-autonomous
gene functions in vivo in health and disease. Yet, MADM can only be applied to
<25% of all mouse genes on select chromosomes to date. To overcome this limitation,
we generate transgenic mice with knocked-in MADM cassettes near the centromeres
of all 19 autosomes and validate their use across organs. With this resource,
>96% of the entire mouse genome can now be subjected to single-cell genetic mosaic
analysis. Beyond a proof of principle, we apply our MADM library to systematically
trace sister chromatid segregation in distinct mitotic cell lineages. We find
striking chromosome-specific biases in segregation patterns, reflecting a putative
mechanism for the asymmetric segregation of genetic determinants in somatic stem
cell division.
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
- _id: PreCl
acknowledgement: We thank the Bioimaging, Life Science, and Pre-Clinical Facilities
at IST Austria; M.P. Postiglione, C. Simbriger, K. Valoskova, C. Schwayer, T. Hussain,
M. Pieber, and V. Wimmer for initial experiments, technical support, and/or assistance;
R. Shigemoto for sharing iv (Dnah11 mutant) mice; and M. Sixt and all members of
the Hippenmeyer lab for discussion. This work was supported by National Institutes
of Health grants ( R01-NS050580 to L.L. and F32MH096361 to L.A.S.). L.L. is an investigator
of HHMI. N.A. received support from FWF Firnberg-Programm ( T 1031 ). A.H.H. is
a recipient of a DOC Fellowship (24812) of the Austrian Academy of Sciences . This
work also received support from IST Austria institutional funds , FWF SFB F78 to
S.H., the People Programme (Marie Curie Actions) of the European Union’s Seventh
Framework Programme ( FP7/2007-2013 ) under REA grant agreement no 618444 to S.H.,
and the European Research Council (ERC) under the European Union’s Horizon 2020
Research and Innovation Programme (grant agreement no. 725780 LinPro ) to S.H.
article_number: '109274'
article_processing_charge: No
article_type: original
author:
- first_name: Ximena
full_name: Contreras, Ximena
id: 475990FE-F248-11E8-B48F-1D18A9856A87
last_name: Contreras
- first_name: Nicole
full_name: Amberg, Nicole
id: 4CD6AAC6-F248-11E8-B48F-1D18A9856A87
last_name: Amberg
orcid: 0000-0002-3183-8207
- first_name: Amarbayasgalan
full_name: Davaatseren, Amarbayasgalan
id: 70ADC922-B424-11E9-99E3-BA18E6697425
last_name: Davaatseren
- first_name: Andi H
full_name: Hansen, Andi H
id: 38853E16-F248-11E8-B48F-1D18A9856A87
last_name: Hansen
- first_name: Johanna
full_name: Sonntag, Johanna
id: 32FE7D7C-F248-11E8-B48F-1D18A9856A87
last_name: Sonntag
- first_name: Lill
full_name: Andersen, Lill
last_name: Andersen
- first_name: Tina
full_name: Bernthaler, Tina
last_name: Bernthaler
- first_name: Carmen
full_name: Streicher, Carmen
id: 36BCB99C-F248-11E8-B48F-1D18A9856A87
last_name: Streicher
- first_name: Anna-Magdalena
full_name: Heger, Anna-Magdalena
id: 4B76FFD2-F248-11E8-B48F-1D18A9856A87
last_name: Heger
- first_name: Randy L.
full_name: Johnson, Randy L.
last_name: Johnson
- first_name: Lindsay A.
full_name: Schwarz, Lindsay A.
last_name: Schwarz
- first_name: Liqun
full_name: Luo, Liqun
last_name: Luo
- first_name: Thomas
full_name: Rülicke, Thomas
last_name: Rülicke
- first_name: Simon
full_name: Hippenmeyer, Simon
id: 37B36620-F248-11E8-B48F-1D18A9856A87
last_name: Hippenmeyer
orcid: 0000-0003-2279-1061
citation:
ama: Contreras X, Amberg N, Davaatseren A, et al. A genome-wide library of MADM
mice for single-cell genetic mosaic analysis. Cell Reports. 2021;35(12).
doi:10.1016/j.celrep.2021.109274
apa: Contreras, X., Amberg, N., Davaatseren, A., Hansen, A. H., Sonntag, J., Andersen,
L., … Hippenmeyer, S. (2021). A genome-wide library of MADM mice for single-cell
genetic mosaic analysis. Cell Reports. Cell Press. https://doi.org/10.1016/j.celrep.2021.109274
chicago: Contreras, Ximena, Nicole Amberg, Amarbayasgalan Davaatseren, Andi H Hansen,
Johanna Sonntag, Lill Andersen, Tina Bernthaler, et al. “A Genome-Wide Library
of MADM Mice for Single-Cell Genetic Mosaic Analysis.” Cell Reports. Cell
Press, 2021. https://doi.org/10.1016/j.celrep.2021.109274.
ieee: X. Contreras et al., “A genome-wide library of MADM mice for single-cell
genetic mosaic analysis,” Cell Reports, vol. 35, no. 12. Cell Press, 2021.
ista: Contreras X, Amberg N, Davaatseren A, Hansen AH, Sonntag J, Andersen L, Bernthaler
T, Streicher C, Heger A-M, Johnson RL, Schwarz LA, Luo L, Rülicke T, Hippenmeyer
S. 2021. A genome-wide library of MADM mice for single-cell genetic mosaic analysis.
Cell Reports. 35(12), 109274.
mla: Contreras, Ximena, et al. “A Genome-Wide Library of MADM Mice for Single-Cell
Genetic Mosaic Analysis.” Cell Reports, vol. 35, no. 12, 109274, Cell Press,
2021, doi:10.1016/j.celrep.2021.109274.
short: X. Contreras, N. Amberg, A. Davaatseren, A.H. Hansen, J. Sonntag, L. Andersen,
T. Bernthaler, C. Streicher, A.-M. Heger, R.L. Johnson, L.A. Schwarz, L. Luo,
T. Rülicke, S. Hippenmeyer, Cell Reports 35 (2021).
date_created: 2021-06-27T22:01:48Z
date_published: 2021-06-22T00:00:00Z
date_updated: 2023-08-10T13:55:00Z
day: '22'
ddc:
- '570'
department:
- _id: SiHi
- _id: LoSw
- _id: PreCl
doi: 10.1016/j.celrep.2021.109274
ec_funded: 1
external_id:
isi:
- '000664463600016'
file:
- access_level: open_access
checksum: d49520fdcbbb5c2f883bddb67cee5d77
content_type: application/pdf
creator: asandaue
date_created: 2021-06-28T14:06:24Z
date_updated: 2021-06-28T14:06:24Z
file_id: '9613'
file_name: 2021_CellReports_Contreras.pdf
file_size: 7653149
relation: main_file
success: 1
file_date_updated: 2021-06-28T14:06:24Z
has_accepted_license: '1'
intvolume: ' 35'
isi: 1
issue: '12'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
project:
- _id: 2625A13E-B435-11E9-9278-68D0E5697425
grant_number: '24812'
name: Molecular Mechanisms of Radial Neuronal Migration
- _id: 25D61E48-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '618444'
name: Molecular Mechanisms of Cerebral Cortex Development
- _id: 260018B0-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '725780'
name: Principles of Neural Stem Cell Lineage Progression in Cerebral Cortex Development
publication: Cell Reports
publication_identifier:
eissn:
- '22111247'
publication_status: published
publisher: Cell Press
quality_controlled: '1'
related_material:
link:
- description: News on IST Homepage
relation: press_release
url: https://ist.ac.at/en/news/boost-for-mouse-genetic-analysis/
scopus_import: '1'
status: public
title: A genome-wide library of MADM mice for single-cell genetic mosaic analysis
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 35
year: '2021'
...
---
_id: '9623'
abstract:
- lang: eng
text: "Cytoplasmic reorganizations are essential for morphogenesis. In large cells
like oocytes, these reorganizations become crucial in patterning the oocyte for
later stages of embryonic development. Ascidians oocytes reorganize their cytoplasm
(ooplasm) in a spectacular manner. Ooplasmic reorganization is initiated at fertilization
with the contraction of the actomyosin cortex along the animal-vegetal axis of
the oocyte, driving the accumulation of cortical endoplasmic reticulum (cER),
maternal mRNAs associated to it and a mitochondria-rich subcortical layer – the
myoplasm – in a region of the vegetal pole termed contraction pole (CP). Here
we have used the species Phallusia mammillata to investigate the changes in cell
shape that accompany these reorganizations and the mechanochemical mechanisms
underlining CP formation.\r\nWe report that the length of the animal-vegetal (AV)
axis oscillates upon fertilization: it first undergoes a cycle of fast elongation-lengthening
followed by a slow expansion of mainly the vegetal pole (VP) of the cell. We show
that the fast oscillation corresponds to a dynamic polarization of the actin cortex
as a result of a fertilization-induced increase in cortical tension in the oocyte
that triggers a rupture of the cortex at the animal pole and the establishment
of vegetal-directed cortical flows. These flows are responsible for the vegetal
accumulation of actin causing the VP to flatten. \r\nWe find that the slow expansion
of the VP, leading to CP formation, correlates with a relaxation of the vegetal
cortex and that the myoplasm plays a role in the expansion. We show that the myoplasm
is a solid-like layer that buckles under compression forces arising from the contracting
actin cortex at the VP. Straightening of the myoplasm when actin flows stops,
facilitates the expansion of the VP and the CP. Altogether, our results present
a previously unrecognized role for the myoplasm in ascidian ooplasmic segregation.
\r\n"
acknowledged_ssus:
- _id: Bio
- _id: EM-Fac
- _id: NanoFab
- _id: M-Shop
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Silvia
full_name: Caballero Mancebo, Silvia
id: 2F1E1758-F248-11E8-B48F-1D18A9856A87
last_name: Caballero Mancebo
orcid: 0000-0002-5223-3346
citation:
ama: Caballero Mancebo S. Fertilization-induced deformations are controlled by the
actin cortex and a mitochondria-rich subcortical layer in ascidian oocytes. 2021.
doi:10.15479/at:ista:9623
apa: Caballero Mancebo, S. (2021). Fertilization-induced deformations are controlled
by the actin cortex and a mitochondria-rich subcortical layer in ascidian oocytes.
Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:9623
chicago: Caballero Mancebo, Silvia. “Fertilization-Induced Deformations Are Controlled
by the Actin Cortex and a Mitochondria-Rich Subcortical Layer in Ascidian Oocytes.”
Institute of Science and Technology Austria, 2021. https://doi.org/10.15479/at:ista:9623.
ieee: S. Caballero Mancebo, “Fertilization-induced deformations are controlled by
the actin cortex and a mitochondria-rich subcortical layer in ascidian oocytes,”
Institute of Science and Technology Austria, 2021.
ista: Caballero Mancebo S. 2021. Fertilization-induced deformations are controlled
by the actin cortex and a mitochondria-rich subcortical layer in ascidian oocytes.
Institute of Science and Technology Austria.
mla: Caballero Mancebo, Silvia. Fertilization-Induced Deformations Are Controlled
by the Actin Cortex and a Mitochondria-Rich Subcortical Layer in Ascidian Oocytes.
Institute of Science and Technology Austria, 2021, doi:10.15479/at:ista:9623.
short: S. Caballero Mancebo, Fertilization-Induced Deformations Are Controlled by
the Actin Cortex and a Mitochondria-Rich Subcortical Layer in Ascidian Oocytes,
Institute of Science and Technology Austria, 2021.
date_created: 2021-07-01T14:50:17Z
date_published: 2021-07-01T00:00:00Z
date_updated: 2023-09-07T13:33:27Z
ddc:
- '570'
degree_awarded: PhD
department:
- _id: GradSch
- _id: CaHe
doi: 10.15479/at:ista:9623
file:
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date_created: 2021-07-01T14:48:54Z
date_updated: 2022-07-02T22:30:06Z
embargo_to: open_access
file_id: '9624'
file_name: PhDThesis_SCM.docx
file_size: 131946790
relation: source_file
- access_level: open_access
checksum: dd4d78962ea94ad95e97ca7d9af08f4b
content_type: application/pdf
creator: scaballe
date_created: 2021-07-01T14:46:25Z
date_updated: 2022-07-02T22:30:06Z
embargo: 2022-07-01
file_id: '9625'
file_name: PhDThesis_SCM.pdf
file_size: 17094958
relation: main_file
file_date_updated: 2022-07-02T22:30:06Z
has_accepted_license: '1'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
page: '111'
publication_identifier:
isbn:
- 978-3-99078-012-1
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '9750'
relation: part_of_dissertation
status: public
- id: '9006'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
title: Fertilization-induced deformations are controlled by the actin cortex and a
mitochondria-rich subcortical layer in ascidian oocytes
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2021'
...
---
_id: '9642'
abstract:
- lang: eng
text: Perineuronal nets (PNNs), components of the extracellular matrix, preferentially
coat parvalbumin-positive interneurons and constrain critical-period plasticity
in the adult cerebral cortex. Current strategies to remove PNN are long-lasting,
invasive, and trigger neuropsychiatric symptoms. Here, we apply repeated anesthetic
ketamine as a method with minimal behavioral effect. We find that this paradigm
strongly reduces PNN coating in the healthy adult brain and promotes juvenile-like
plasticity. Microglia are critically involved in PNN loss because they engage
with parvalbumin-positive neurons in their defined cortical layer. We identify
external 60-Hz light-flickering entrainment to recapitulate microglia-mediated
PNN removal. Importantly, 40-Hz frequency, which is known to remove amyloid plaques,
does not induce PNN loss, suggesting microglia might functionally tune to distinct
brain frequencies. Thus, our 60-Hz light-entrainment strategy provides an alternative
form of PNN intervention in the healthy adult brain.
acknowledged_ssus:
- _id: Bio
- _id: PreCl
acknowledgement: We thank the scientific service units at IST Austria, especially
the IST bioimaging facility, the preclinical facility, and, specifically, Michael
Schunn and Sonja Haslinger for excellent support; Plexxikon for the PLX food; the
Csicsvari group for advice and equipment for in vivo recording; Jürgen Siegert for
the light-entrainment design; Marco Benevento, Soledad Gonzalo Cogno, Pat King,
and all Siegert group members for constant feedback on the project and manuscript;
Lorena Pantano (PILM Bioinformatics Core) for assisting with sample-size determination
for OD plasticity experiments; and Ana Morello from MIT for technical assistance
with VEPs recordings. This research was supported by a DOC Fellowship from the Austrian
Academy of Sciences at the Institute of Science and Technology Austria to R.S.,
from the European Union Horizon 2020 research and innovation program under the Marie
Skłodowska-Curie Actions program (grants 665385 to G.C.; 754411 to R.J.A.C.), the
European Research Council (grant 715571 to S.S.), and the National Eye Institute
of the National Institutes of Health under award numbers R01EY029245 (to M.F.B.)
and R01EY023037 (diversity supplement to H.D.J-C.).
article_number: '109313'
article_processing_charge: No
article_type: original
author:
- first_name: Alessandro
full_name: Venturino, Alessandro
id: 41CB84B2-F248-11E8-B48F-1D18A9856A87
last_name: Venturino
orcid: 0000-0003-2356-9403
- first_name: Rouven
full_name: Schulz, Rouven
id: 4C5E7B96-F248-11E8-B48F-1D18A9856A87
last_name: Schulz
orcid: 0000-0001-5297-733X
- first_name: Héctor
full_name: De Jesús-Cortés, Héctor
last_name: De Jesús-Cortés
- first_name: Margaret E
full_name: Maes, Margaret E
id: 3838F452-F248-11E8-B48F-1D18A9856A87
last_name: Maes
orcid: 0000-0001-9642-1085
- first_name: Balint
full_name: Nagy, Balint
id: 93C65ECC-A6F2-11E9-8DF9-9712E6697425
last_name: Nagy
- first_name: Francis
full_name: Reilly-Andújar, Francis
last_name: Reilly-Andújar
- first_name: Gloria
full_name: Colombo, Gloria
id: 3483CF6C-F248-11E8-B48F-1D18A9856A87
last_name: Colombo
orcid: 0000-0001-9434-8902
- first_name: Ryan J
full_name: Cubero, Ryan J
id: 850B2E12-9CD4-11E9-837F-E719E6697425
last_name: Cubero
orcid: 0000-0003-0002-1867
- first_name: Florianne E
full_name: Schoot Uiterkamp, Florianne E
id: 3526230C-F248-11E8-B48F-1D18A9856A87
last_name: Schoot Uiterkamp
- first_name: Mark F.
full_name: Bear, Mark F.
last_name: Bear
- first_name: Sandra
full_name: Siegert, Sandra
id: 36ACD32E-F248-11E8-B48F-1D18A9856A87
last_name: Siegert
orcid: 0000-0001-8635-0877
citation:
ama: Venturino A, Schulz R, De Jesús-Cortés H, et al. Microglia enable mature perineuronal
nets disassembly upon anesthetic ketamine exposure or 60-Hz light entrainment
in the healthy brain. Cell Reports. 2021;36(1). doi:10.1016/j.celrep.2021.109313
apa: Venturino, A., Schulz, R., De Jesús-Cortés, H., Maes, M. E., Nagy, B., Reilly-Andújar,
F., … Siegert, S. (2021). Microglia enable mature perineuronal nets disassembly
upon anesthetic ketamine exposure or 60-Hz light entrainment in the healthy brain.
Cell Reports. Elsevier. https://doi.org/10.1016/j.celrep.2021.109313
chicago: Venturino, Alessandro, Rouven Schulz, Héctor De Jesús-Cortés, Margaret
E Maes, Balint Nagy, Francis Reilly-Andújar, Gloria Colombo, et al. “Microglia
Enable Mature Perineuronal Nets Disassembly upon Anesthetic Ketamine Exposure
or 60-Hz Light Entrainment in the Healthy Brain.” Cell Reports. Elsevier,
2021. https://doi.org/10.1016/j.celrep.2021.109313.
ieee: A. Venturino et al., “Microglia enable mature perineuronal nets disassembly
upon anesthetic ketamine exposure or 60-Hz light entrainment in the healthy brain,”
Cell Reports, vol. 36, no. 1. Elsevier, 2021.
ista: Venturino A, Schulz R, De Jesús-Cortés H, Maes ME, Nagy B, Reilly-Andújar
F, Colombo G, Cubero RJ, Schoot Uiterkamp FE, Bear MF, Siegert S. 2021. Microglia
enable mature perineuronal nets disassembly upon anesthetic ketamine exposure
or 60-Hz light entrainment in the healthy brain. Cell Reports. 36(1), 109313.
mla: Venturino, Alessandro, et al. “Microglia Enable Mature Perineuronal Nets Disassembly
upon Anesthetic Ketamine Exposure or 60-Hz Light Entrainment in the Healthy Brain.”
Cell Reports, vol. 36, no. 1, 109313, Elsevier, 2021, doi:10.1016/j.celrep.2021.109313.
short: A. Venturino, R. Schulz, H. De Jesús-Cortés, M.E. Maes, B. Nagy, F. Reilly-Andújar,
G. Colombo, R.J. Cubero, F.E. Schoot Uiterkamp, M.F. Bear, S. Siegert, Cell Reports
36 (2021).
date_created: 2021-07-11T22:01:16Z
date_published: 2021-07-06T00:00:00Z
date_updated: 2023-08-10T14:09:39Z
day: '06'
ddc:
- '570'
department:
- _id: SaSi
doi: 10.1016/j.celrep.2021.109313
ec_funded: 1
external_id:
isi:
- '000670188500004'
pmid:
- '34233180'
file:
- access_level: open_access
checksum: f056255f6d01fd9a86b5387635928173
content_type: application/pdf
creator: cziletti
date_created: 2021-07-19T13:32:17Z
date_updated: 2021-07-19T13:32:17Z
file_id: '9693'
file_name: 2021_CellReports_Venturino.pdf
file_size: 56388540
relation: main_file
success: 1
file_date_updated: 2021-07-19T13:32:17Z
has_accepted_license: '1'
intvolume: ' 36'
isi: 1
issue: '1'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '665385'
name: International IST Doctoral Program
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
- _id: 25D4A630-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '715571'
name: Microglia action towards neuronal circuit formation and function in health
and disease
publication: Cell Reports
publication_identifier:
eissn:
- '22111247'
publication_status: published
publisher: Elsevier
quality_controlled: '1'
related_material:
link:
- description: News on IST Homepage
relation: press_release
url: https://ist.ac.at/en/news/the-twinkle-and-the-brain/
scopus_import: '1'
status: public
title: Microglia enable mature perineuronal nets disassembly upon anesthetic ketamine
exposure or 60-Hz light entrainment in the healthy brain
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 36
year: '2021'
...
---
_id: '9887'
abstract:
- lang: eng
text: Clathrin-mediated endocytosis is the major route of entry of cargos into cells
and thus underpins many physiological processes. During endocytosis, an area of
flat membrane is remodeled by proteins to create a spherical vesicle against intracellular
forces. The protein machinery which mediates this membrane bending in plants is
unknown. However, it is known that plant endocytosis is actin independent, thus
indicating that plants utilize a unique mechanism to mediate membrane bending
against high-turgor pressure compared to other model systems. Here, we investigate
the TPLATE complex, a plant-specific endocytosis protein complex. It has been
thought to function as a classical adaptor functioning underneath the clathrin
coat. However, by using biochemical and advanced live microscopy approaches, we
found that TPLATE is peripherally associated with clathrin-coated vesicles and
localizes at the rim of endocytosis events. As this localization is more fitting
to the protein machinery involved in membrane bending during endocytosis, we examined
cells in which the TPLATE complex was disrupted and found that the clathrin structures
present as flat patches. This suggests a requirement of the TPLATE complex for
membrane bending during plant clathrin–mediated endocytosis. Next, we used in
vitro biophysical assays to confirm that the TPLATE complex possesses protein
domains with intrinsic membrane remodeling activity. These results redefine the
role of the TPLATE complex and implicate it as a key component of the evolutionarily
distinct plant endocytosis mechanism, which mediates endocytic membrane bending
against the high-turgor pressure in plant cells.
acknowledged_ssus:
- _id: EM-Fac
- _id: LifeSc
- _id: Bio
acknowledgement: 'We gratefully thank Julie Neveu and Dr. Amanda Barranco of the Grégory
Vert laboratory for help preparing plants in France, Dr. Zuzana Gelova for help
and advice with protoplast generation, Dr. Stéphane Vassilopoulos and Dr. Florian
Schur for advice regarding EM tomography, Alejandro Marquiegui Alvaro for help with
material generation, and Dr. Lukasz Kowalski for generously gifting us the mWasabi
protein. This research was supported by the Scientific Service Units of Institute
of Science and Technology Austria (IST Austria) through resources provided by the
Electron Microscopy Facility, Lab Support Facility (particularly Dorota Jaworska),
and the Bioimaging Facility. We acknowledge the Advanced Microscopy Facility of
the Vienna BioCenter Core Facilities for use of the 3D SIM. For the mass spectrometry
analysis of proteins, we acknowledge the University of Natural Resources and Life
Sciences (BOKU) Core Facility Mass Spectrometry. This work was supported by the
following funds: A.J. is supported by funding from the Austrian Science Fund I3630B25
to J.F. P.M. and E.B. are supported by Agence Nationale de la Recherche ANR-11-EQPX-0029
Morphoscope2 and ANR-10-INBS-04 France BioImaging. S.Y.B. is supported by the NSF
No. 1121998 and 1614915. J.W. and D.V.D. are supported by the European Research
Council Grant 682436 (to D.V.D.), a China Scholarship Council Grant 201508440249
(to J.W.), and by a Ghent University Special Research Co-funding Grant ST01511051
(to J.W.).'
article_number: e2113046118
article_processing_charge: No
article_type: original
author:
- first_name: Alexander J
full_name: Johnson, Alexander J
id: 46A62C3A-F248-11E8-B48F-1D18A9856A87
last_name: Johnson
orcid: 0000-0002-2739-8843
- first_name: Dana A
full_name: Dahhan, Dana A
last_name: Dahhan
- first_name: Nataliia
full_name: Gnyliukh, Nataliia
id: 390C1120-F248-11E8-B48F-1D18A9856A87
last_name: Gnyliukh
orcid: 0000-0002-2198-0509
- first_name: Walter
full_name: Kaufmann, Walter
id: 3F99E422-F248-11E8-B48F-1D18A9856A87
last_name: Kaufmann
orcid: 0000-0001-9735-5315
- first_name: Vanessa
full_name: Zheden, Vanessa
id: 39C5A68A-F248-11E8-B48F-1D18A9856A87
last_name: Zheden
orcid: 0000-0002-9438-4783
- first_name: Tommaso
full_name: Costanzo, Tommaso
id: D93824F4-D9BA-11E9-BB12-F207E6697425
last_name: Costanzo
orcid: 0000-0001-9732-3815
- first_name: Pierre
full_name: Mahou, Pierre
last_name: Mahou
- first_name: Mónika
full_name: Hrtyan, Mónika
id: 45A71A74-F248-11E8-B48F-1D18A9856A87
last_name: Hrtyan
- first_name: Jie
full_name: Wang, Jie
last_name: Wang
- first_name: Juan L
full_name: Aguilera Servin, Juan L
id: 2A67C376-F248-11E8-B48F-1D18A9856A87
last_name: Aguilera Servin
orcid: 0000-0002-2862-8372
- first_name: Daniël
full_name: van Damme, Daniël
last_name: van Damme
- first_name: Emmanuel
full_name: Beaurepaire, Emmanuel
last_name: Beaurepaire
- first_name: Martin
full_name: Loose, Martin
id: 462D4284-F248-11E8-B48F-1D18A9856A87
last_name: Loose
orcid: 0000-0001-7309-9724
- first_name: Sebastian Y
full_name: Bednarek, Sebastian Y
last_name: Bednarek
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
citation:
ama: Johnson AJ, Dahhan DA, Gnyliukh N, et al. The TPLATE complex mediates membrane
bending during plant clathrin-mediated endocytosis. Proceedings of the National
Academy of Sciences. 2021;118(51). doi:10.1073/pnas.2113046118
apa: Johnson, A. J., Dahhan, D. A., Gnyliukh, N., Kaufmann, W., Zheden, V., Costanzo,
T., … Friml, J. (2021). The TPLATE complex mediates membrane bending during plant
clathrin-mediated endocytosis. Proceedings of the National Academy of Sciences.
National Academy of Sciences. https://doi.org/10.1073/pnas.2113046118
chicago: Johnson, Alexander J, Dana A Dahhan, Nataliia Gnyliukh, Walter Kaufmann,
Vanessa Zheden, Tommaso Costanzo, Pierre Mahou, et al. “The TPLATE Complex Mediates
Membrane Bending during Plant Clathrin-Mediated Endocytosis.” Proceedings of
the National Academy of Sciences. National Academy of Sciences, 2021. https://doi.org/10.1073/pnas.2113046118.
ieee: A. J. Johnson et al., “The TPLATE complex mediates membrane bending
during plant clathrin-mediated endocytosis,” Proceedings of the National Academy
of Sciences, vol. 118, no. 51. National Academy of Sciences, 2021.
ista: Johnson AJ, Dahhan DA, Gnyliukh N, Kaufmann W, Zheden V, Costanzo T, Mahou
P, Hrtyan M, Wang J, Aguilera Servin JL, van Damme D, Beaurepaire E, Loose M,
Bednarek SY, Friml J. 2021. The TPLATE complex mediates membrane bending during
plant clathrin-mediated endocytosis. Proceedings of the National Academy of Sciences.
118(51), e2113046118.
mla: Johnson, Alexander J., et al. “The TPLATE Complex Mediates Membrane Bending
during Plant Clathrin-Mediated Endocytosis.” Proceedings of the National Academy
of Sciences, vol. 118, no. 51, e2113046118, National Academy of Sciences,
2021, doi:10.1073/pnas.2113046118.
short: A.J. Johnson, D.A. Dahhan, N. Gnyliukh, W. Kaufmann, V. Zheden, T. Costanzo,
P. Mahou, M. Hrtyan, J. Wang, J.L. Aguilera Servin, D. van Damme, E. Beaurepaire,
M. Loose, S.Y. Bednarek, J. Friml, Proceedings of the National Academy of Sciences
118 (2021).
date_created: 2021-08-11T14:11:43Z
date_published: 2021-12-14T00:00:00Z
date_updated: 2024-02-19T11:06:09Z
day: '14'
ddc:
- '580'
department:
- _id: JiFr
- _id: MaLo
- _id: EvBe
- _id: EM-Fac
- _id: NanoFab
doi: 10.1073/pnas.2113046118
external_id:
isi:
- '000736417600043'
pmid:
- '34907016'
file:
- access_level: open_access
checksum: 8d01e72e22c4fb1584e72d8601947069
content_type: application/pdf
creator: cchlebak
date_created: 2021-12-15T08:59:40Z
date_updated: 2021-12-15T08:59:40Z
file_id: '10546'
file_name: 2021_PNAS_Johnson.pdf
file_size: 2757340
relation: main_file
success: 1
file_date_updated: 2021-12-15T08:59:40Z
has_accepted_license: '1'
intvolume: ' 118'
isi: 1
issue: '51'
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 26538374-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: I03630
name: Molecular mechanisms of endocytic cargo recognition in plants
publication: Proceedings of the National Academy of Sciences
publication_identifier:
eissn:
- 1091-6490
publication_status: published
publisher: National Academy of Sciences
quality_controlled: '1'
related_material:
link:
- relation: earlier_version
url: https://doi.org/10.1101/2021.04.26.441441
record:
- id: '14510'
relation: dissertation_contains
status: public
- id: '14988'
relation: research_data
status: public
status: public
title: The TPLATE complex mediates membrane bending during plant clathrin-mediated
endocytosis
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 118
year: '2021'
...
---
_id: '9907'
abstract:
- lang: eng
text: 'DivIVA is a protein initially identified as a spatial regulator of cell division
in the model organism Bacillus subtilis, but its homologues are present in many
other Gram-positive bacteria, including Clostridia species. Besides its role as
topological regulator of the Min system during bacterial cell division, DivIVA
is involved in chromosome segregation during sporulation, genetic competence,
and cell wall synthesis. DivIVA localizes to regions of high membrane curvature,
such as the cell poles and cell division site, where it recruits distinct binding
partners. Previously, it was suggested that negative curvature sensing is the
main mechanism by which DivIVA binds to these specific regions. Here, we show
that Clostridioides difficile DivIVA binds preferably to membranes containing
negatively charged phospholipids, especially cardiolipin. Strikingly, we observed
that upon binding, DivIVA modifies the lipid distribution and induces changes
to lipid bilayers containing cardiolipin. Our observations indicate that DivIVA
might play a more complex and so far unknown active role during the formation
of the cell division septal membrane. '
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
acknowledgement: "We thank Daniela Krajˇcíkova, Katarína Muchová, Zuzana Chromíkova
and other members of Barák’s laboratory for useful discussions, suggestions and
help. Special thanks also to Emília Chovancová for technical support. We are grateful
to Juraj Labaj for drawing the model and for help with graphics. Many thanks to
all members of Loose’s laboratory: Maria del Mar\r\nLópez, Paulo Caldas, Philipp
Radler, and other members of the Loose’s laboratory for sharing their knowledge
of SLB preparation and TIRF experiment chambers, for sharing coverslips and for
help with the TIRF microscope and data analysis. We also thank the members of the
Dept. of Biochemistry of Biomembranes at the Institute of Animal Biochemistry and
Genetics, CBs SAS for their help with preparing the lipid mixtures. We thank J.
Bauer for critically reading the manuscript."
article_number: '8350'
article_processing_charge: Yes
article_type: original
author:
- first_name: Naďa
full_name: Labajová, Naďa
last_name: Labajová
- first_name: Natalia S.
full_name: Baranova, Natalia S.
id: 38661662-F248-11E8-B48F-1D18A9856A87
last_name: Baranova
orcid: 0000-0002-3086-9124
- first_name: Miroslav
full_name: Jurásek, Miroslav
last_name: Jurásek
- first_name: Robert
full_name: Vácha, Robert
last_name: Vácha
- first_name: Martin
full_name: Loose, Martin
id: 462D4284-F248-11E8-B48F-1D18A9856A87
last_name: Loose
orcid: 0000-0001-7309-9724
- first_name: Imrich
full_name: Barák, Imrich
last_name: Barák
citation:
ama: Labajová N, Baranova NS, Jurásek M, Vácha R, Loose M, Barák I. Cardiolipin-containing
lipid membranes attract the bacterial cell division protein diviva. International
Journal of Molecular Sciences. 2021;22(15). doi:10.3390/ijms22158350
apa: Labajová, N., Baranova, N. S., Jurásek, M., Vácha, R., Loose, M., & Barák,
I. (2021). Cardiolipin-containing lipid membranes attract the bacterial cell division
protein diviva. International Journal of Molecular Sciences. MDPI. https://doi.org/10.3390/ijms22158350
chicago: Labajová, Naďa, Natalia S. Baranova, Miroslav Jurásek, Robert Vácha, Martin
Loose, and Imrich Barák. “Cardiolipin-Containing Lipid Membranes Attract the Bacterial
Cell Division Protein Diviva.” International Journal of Molecular Sciences.
MDPI, 2021. https://doi.org/10.3390/ijms22158350.
ieee: N. Labajová, N. S. Baranova, M. Jurásek, R. Vácha, M. Loose, and I. Barák,
“Cardiolipin-containing lipid membranes attract the bacterial cell division protein
diviva,” International Journal of Molecular Sciences, vol. 22, no. 15.
MDPI, 2021.
ista: Labajová N, Baranova NS, Jurásek M, Vácha R, Loose M, Barák I. 2021. Cardiolipin-containing
lipid membranes attract the bacterial cell division protein diviva. International
Journal of Molecular Sciences. 22(15), 8350.
mla: Labajová, Naďa, et al. “Cardiolipin-Containing Lipid Membranes Attract the
Bacterial Cell Division Protein Diviva.” International Journal of Molecular
Sciences, vol. 22, no. 15, 8350, MDPI, 2021, doi:10.3390/ijms22158350.
short: N. Labajová, N.S. Baranova, M. Jurásek, R. Vácha, M. Loose, I. Barák, International
Journal of Molecular Sciences 22 (2021).
date_created: 2021-08-15T22:01:27Z
date_published: 2021-08-01T00:00:00Z
date_updated: 2023-08-11T10:34:44Z
day: '01'
ddc:
- '570'
department:
- _id: MaLo
doi: 10.3390/ijms22158350
ec_funded: 1
external_id:
isi:
- '000681815400001'
pmid:
- '34361115'
file:
- access_level: open_access
checksum: a4bc06e9a2c803ceff5a91f10b174054
content_type: application/pdf
creator: asandaue
date_created: 2021-08-16T09:35:56Z
date_updated: 2021-08-16T09:35:56Z
file_id: '9923'
file_name: 2021_InternationalJournalOfMolecularSciences_Labajová .pdf
file_size: 6132410
relation: main_file
success: 1
file_date_updated: 2021-08-16T09:35:56Z
has_accepted_license: '1'
intvolume: ' 22'
isi: 1
issue: '15'
language:
- iso: eng
month: '08'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 2595697A-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '679239'
name: Self-Organization of the Bacterial Cell
publication: International Journal of Molecular Sciences
publication_identifier:
eissn:
- '14220067'
issn:
- '16616596'
publication_status: published
publisher: MDPI
quality_controlled: '1'
scopus_import: '1'
status: public
title: Cardiolipin-containing lipid membranes attract the bacterial cell division
protein diviva
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 22
year: '2021'
...
---
_id: '9992'
abstract:
- lang: eng
text: "Blood – this is what animals use to heal wounds fast and efficient. Plants
do not have blood circulation and their cells cannot move. However, plants have
evolved remarkable capacities to regenerate tissues and organs preventing further
damage. In my PhD research, I studied the wound healing in the Arabidopsis root.
I used a UV laser to ablate single cells in the root tip and observed the consequent
wound healing. Interestingly, the inner adjacent cells induced a\r\ndivision plane
switch and subsequently adopted the cell type of the killed cell to replace it.
We termed this form of wound healing “restorative divisions”. This initial observation
triggered the questions of my PhD studies: How and why do cells orient their division
planes, how do they feel the wound and why does this happen only in inner adjacent
cells.\r\nFor answering these questions, I used a quite simple experimental setup:
5 day - old seedlings were stained with propidium iodide to visualize cell walls
and dead cells; ablation was carried out using a special laser cutter and a confocal
microscope. Adaptation of the novel vertical microscope system made it possible
to observe wounds in real time. This revealed that restorative divisions occur
at increased frequency compared to normal divisions. Additionally,\r\nthe major
plant hormone auxin accumulates in wound adjacent cells and drives the expression
of the wound-stress responsive transcription factor ERF115. Using this as a marker
gene for wound responses, we found that an important part of wound signalling
is the sensing of the collapse of the ablated cell. The collapse causes a radical
pressure drop, which results in strong tissue deformations. These deformations
manifest in an invasion of the now free spot specifically by the inner adjacent
cells within seconds, probably because of higher pressure of the inner tissues.
Long-term imaging revealed that those deformed cells continuously expand towards
the wound hole and that this is crucial for the restorative division. These wound-expanding
cells exhibit an abnormal, biphasic polarity of microtubule arrays\r\nbefore the
division. Experiments inhibiting cell expansion suggest that it is the biphasic
stretching that induces those MT arrays. Adapting the micromanipulator aspiration
system from animal scientists at our institute confirmed the hypothesis that stretching
influences microtubule stability. In conclusion, this shows that microtubules
react to tissue deformation\r\nand this facilitates the observed division plane
switch. This puts mechanical cues and tensions at the most prominent position
for explaining the growth and wound healing properties of plants. Hence, it shines
light onto the importance of understanding mechanical signal transduction. "
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Lukas
full_name: Hörmayer, Lukas
id: 2EEE7A2A-F248-11E8-B48F-1D18A9856A87
last_name: Hörmayer
orcid: 0000-0001-8295-2926
citation:
ama: Hörmayer L. Wound healing in the Arabidopsis root meristem. 2021. doi:10.15479/at:ista:9992
apa: Hörmayer, L. (2021). Wound healing in the Arabidopsis root meristem.
Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:9992
chicago: Hörmayer, Lukas. “Wound Healing in the Arabidopsis Root Meristem.” Institute
of Science and Technology Austria, 2021. https://doi.org/10.15479/at:ista:9992.
ieee: L. Hörmayer, “Wound healing in the Arabidopsis root meristem,” Institute of
Science and Technology Austria, 2021.
ista: Hörmayer L. 2021. Wound healing in the Arabidopsis root meristem. Institute
of Science and Technology Austria.
mla: Hörmayer, Lukas. Wound Healing in the Arabidopsis Root Meristem. Institute
of Science and Technology Austria, 2021, doi:10.15479/at:ista:9992.
short: L. Hörmayer, Wound Healing in the Arabidopsis Root Meristem, Institute of
Science and Technology Austria, 2021.
date_created: 2021-09-09T07:37:20Z
date_published: 2021-09-13T00:00:00Z
date_updated: 2023-09-07T13:38:33Z
day: '13'
ddc:
- '575'
degree_awarded: PhD
department:
- _id: GradSch
- _id: JiFr
doi: 10.15479/at:ista:9992
ec_funded: 1
file:
- access_level: closed
checksum: c763064adaa720e16066c1a4f9682bbb
content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
creator: lhoermaye
date_created: 2021-09-09T07:29:48Z
date_updated: 2021-09-15T22:30:26Z
embargo_to: open_access
file_id: '9993'
file_name: Thesis_vupload.docx
file_size: 25179004
relation: source_file
- access_level: open_access
checksum: 53911b06e93d7cdbbf4c7f4c162fa70f
content_type: application/pdf
creator: lhoermaye
date_created: 2021-09-09T14:25:08Z
date_updated: 2021-09-15T22:30:26Z
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month: '09'
oa: 1
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page: '168'
project:
- _id: 262EF96E-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P29988
name: RNA-directed DNA methylation in plant development
- _id: 261099A6-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '742985'
name: Tracing Evolution of Auxin Transport and Polarity in Plants
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
record:
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relation: part_of_dissertation
status: public
- id: '6943'
relation: part_of_dissertation
status: public
- id: '8002'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
title: Wound healing in the Arabidopsis root meristem
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2021'
...
---
_id: '8336'
abstract:
- lang: eng
text: Plant hormone cytokinins are perceived by a subfamily of sensor histidine
kinases (HKs), which via a two-component phosphorelay cascade activate transcriptional
responses in the nucleus. Subcellular localization of the receptors proposed the
endoplasmic reticulum (ER) membrane as a principal cytokinin perception site,
while study of cytokinin transport pointed to the plasma membrane (PM)-mediated
cytokinin signalling. Here, by detailed monitoring of subcellular localizations
of the fluorescently labelled natural cytokinin probe and the receptor ARABIDOPSIS
HISTIDINE KINASE 4 (CRE1/AHK4) fused to GFP reporter, we show that pools of the
ER-located cytokinin receptors can enter the secretory pathway and reach the PM
in cells of the root apical meristem, and the cell plate of dividing meristematic
cells. Brefeldin A (BFA) experiments revealed vesicular recycling of the receptor
and its accumulation in BFA compartments. We provide a revised view on cytokinin
signalling and the possibility of multiple sites of perception at PM and ER.
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
acknowledgement: This paper is dedicated to deceased P. Galuszka for his support and
contribution to the project. This research was supported by the Scientific Service
Units (SSU) of IST-Austria through resources provided by the Bioimaging Facility
(BIF), the Life Science Facility (LSF) and by Centre of the Region Haná (CRH), Palacký
University. We thank Lucia Hlusková, Zuzana Pěkná and Martin Hönig for technical
assistance, and Fernando Aniento, Rashed Abualia and Andrej Hurný for sharing material.
The work was supported from ERDF project “Plants as a tool for sustainable global
development” (No. CZ.02.1.01/0.0/0.0/16_019/0000827), from Czech Science Foundation
via projects 16-04184S (O.P., K.K. and K.D.), 18-23972Y (D.Z., K.K.), 17-21122S
(K.B.), Erasmus+ (K.K.), Endowment Fund of Palacký University (K.K.) and EMBO Long-Term
Fellowship, ALTF number 710-2016 (J.C.M.); People Programme (Marie Curie Actions)
of the European Union’s Seventh Framework Programme (FP7/2007-2013) under REA grant
agreement no. [291734] (N.C.); DOC Fellowship of the Austrian Academy of Sciences
at the Institute of Science and Technology, Austria (H.S.).
article_number: '4285'
article_processing_charge: No
article_type: original
author:
- first_name: Karolina
full_name: Kubiasova, Karolina
id: 946011F4-3E71-11EA-860B-C7A73DDC885E
last_name: Kubiasova
orcid: 0000-0001-5630-9419
- first_name: Juan C
full_name: Montesinos López, Juan C
id: 310A8E3E-F248-11E8-B48F-1D18A9856A87
last_name: Montesinos López
orcid: 0000-0001-9179-6099
- first_name: Olga
full_name: Šamajová, Olga
last_name: Šamajová
- first_name: Jaroslav
full_name: Nisler, Jaroslav
last_name: Nisler
- first_name: Václav
full_name: Mik, Václav
last_name: Mik
- first_name: Hana
full_name: Semeradova, Hana
id: 42FE702E-F248-11E8-B48F-1D18A9856A87
last_name: Semeradova
- first_name: Lucie
full_name: Plíhalová, Lucie
last_name: Plíhalová
- first_name: Ondřej
full_name: Novák, Ondřej
last_name: Novák
- first_name: Peter
full_name: Marhavý, Peter
id: 3F45B078-F248-11E8-B48F-1D18A9856A87
last_name: Marhavý
orcid: 0000-0001-5227-5741
- first_name: Nicola
full_name: Cavallari, Nicola
id: 457160E6-F248-11E8-B48F-1D18A9856A87
last_name: Cavallari
- first_name: David
full_name: Zalabák, David
last_name: Zalabák
- first_name: Karel
full_name: Berka, Karel
last_name: Berka
- first_name: Karel
full_name: Doležal, Karel
last_name: Doležal
- first_name: Petr
full_name: Galuszka, Petr
last_name: Galuszka
- first_name: Jozef
full_name: Šamaj, Jozef
last_name: Šamaj
- first_name: Miroslav
full_name: Strnad, Miroslav
last_name: Strnad
- first_name: Eva
full_name: Benková, Eva
id: 38F4F166-F248-11E8-B48F-1D18A9856A87
last_name: Benková
orcid: 0000-0002-8510-9739
- first_name: Ondřej
full_name: Plíhal, Ondřej
last_name: Plíhal
- first_name: Lukáš
full_name: Spíchal, Lukáš
last_name: Spíchal
citation:
ama: Kubiasova K, Montesinos López JC, Šamajová O, et al. Cytokinin fluoroprobe
reveals multiple sites of cytokinin perception at plasma membrane and endoplasmic
reticulum. Nature Communications. 2020;11. doi:10.1038/s41467-020-17949-0
apa: Kubiasova, K., Montesinos López, J. C., Šamajová, O., Nisler, J., Mik, V.,
Semerádová, H., … Spíchal, L. (2020). Cytokinin fluoroprobe reveals multiple sites
of cytokinin perception at plasma membrane and endoplasmic reticulum. Nature
Communications. Springer Nature. https://doi.org/10.1038/s41467-020-17949-0
chicago: Kubiasova, Karolina, Juan C Montesinos López, Olga Šamajová, Jaroslav Nisler,
Václav Mik, Hana Semerádová, Lucie Plíhalová, et al. “Cytokinin Fluoroprobe Reveals
Multiple Sites of Cytokinin Perception at Plasma Membrane and Endoplasmic Reticulum.”
Nature Communications. Springer Nature, 2020. https://doi.org/10.1038/s41467-020-17949-0.
ieee: K. Kubiasova et al., “Cytokinin fluoroprobe reveals multiple sites
of cytokinin perception at plasma membrane and endoplasmic reticulum,” Nature
Communications, vol. 11. Springer Nature, 2020.
ista: Kubiasova K, Montesinos López JC, Šamajová O, Nisler J, Mik V, Semerádová
H, Plíhalová L, Novák O, Marhavý P, Cavallari N, Zalabák D, Berka K, Doležal K,
Galuszka P, Šamaj J, Strnad M, Benková E, Plíhal O, Spíchal L. 2020. Cytokinin
fluoroprobe reveals multiple sites of cytokinin perception at plasma membrane
and endoplasmic reticulum. Nature Communications. 11, 4285.
mla: Kubiasova, Karolina, et al. “Cytokinin Fluoroprobe Reveals Multiple Sites of
Cytokinin Perception at Plasma Membrane and Endoplasmic Reticulum.” Nature
Communications, vol. 11, 4285, Springer Nature, 2020, doi:10.1038/s41467-020-17949-0.
short: K. Kubiasova, J.C. Montesinos López, O. Šamajová, J. Nisler, V. Mik, H. Semerádová,
L. Plíhalová, O. Novák, P. Marhavý, N. Cavallari, D. Zalabák, K. Berka, K. Doležal,
P. Galuszka, J. Šamaj, M. Strnad, E. Benková, O. Plíhal, L. Spíchal, Nature Communications
11 (2020).
date_created: 2020-09-06T22:01:12Z
date_published: 2020-08-27T00:00:00Z
date_updated: 2023-08-22T09:09:06Z
day: '27'
ddc:
- '580'
department:
- _id: EvBe
doi: 10.1038/s41467-020-17949-0
ec_funded: 1
external_id:
isi:
- '000567931000002'
pmid:
- '32855390'
file:
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checksum: 7494b7665b3d2bf2d8edb13e4f12b92d
content_type: application/pdf
creator: dernst
date_created: 2020-09-10T08:05:19Z
date_updated: 2020-09-10T08:05:19Z
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file_name: 2020_NatureComm_Kubiasova.pdf
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oa_version: Published Version
pmid: 1
project:
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
- _id: 261821BC-B435-11E9-9278-68D0E5697425
grant_number: '24746'
name: Molecular mechanisms of the cytokinin regulated endomembrane trafficking to
coordinate plant organogenesis.
- _id: 253E54C8-B435-11E9-9278-68D0E5697425
grant_number: ALTF710-2016
name: Molecular mechanism of auxindriven formative divisions delineating lateral
root organogenesis in plants
publication: Nature Communications
publication_identifier:
eissn:
- '20411723'
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Cytokinin fluoroprobe reveals multiple sites of cytokinin perception at plasma
membrane and endoplasmic reticulum
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 11
year: '2020'
...
---
_id: '8337'
abstract:
- lang: eng
text: Cytokinins are mobile multifunctional plant hormones with roles in development
and stress resilience. Although their Histidine Kinase receptors are substantially
localised to the endoplasmic reticulum, cellular sites of cytokinin perception
and importance of spatially heterogeneous cytokinin distribution continue to be
debated. Here we show that cytokinin perception by plasma membrane receptors is
an effective additional path for cytokinin response. Readout from a Two Component
Signalling cytokinin-specific reporter (TCSn::GFP) closely matches intracellular
cytokinin content in roots, yet we also find cytokinins in extracellular fluid,
potentially enabling action at the cell surface. Cytokinins covalently linked
to beads that could not pass the plasma membrane increased expression of both
TCSn::GFP and Cytokinin Response Factors. Super-resolution microscopy of GFP-labelled
receptors and diminished TCSn::GFP response to immobilised cytokinins in cytokinin
receptor mutants, further indicate that receptors can function at the cell surface.
We argue that dual intracellular and surface locations may augment flexibility
of cytokinin responses.
acknowledged_ssus:
- _id: Bio
acknowledgement: 'We thank Bruno Müller and Aaron Rashotte for critical discussions
and provision of plant lines used in this work, Roger Granbom and Tamara Hernández
Verdeja (UPSC, Umeå, Sweden) for technical assistance and providing materials, Zuzana
Pěkná and Karolina Wojewodová (CRH, Palacký University, Olomouc, Czech Republic)
for help with cytokinin receptor binding assays, and David Zalabák (CRH, Palacký
University, Olomouc, Czech Republic) for provision of vector pINIIIΔEH expressing
CRE1/AHK4. The bioimaging facility of IST Austria, the Swedish Metabolomics Centre
and the IST Austria Bio-Imaging facility are acknowledged for support. The work
was funded by the European Molecular Biology Organization (EMBO ASTF 297-2013) (I.A.),
Development—The Company of Biologists (DEVTF2012) (I.A.; C.T.), Plant Fellows (the
International Post doc Fellowship Programme in Plant Sciences, 267423) (I.A.; K.L.),
the Swedish Research Council (621-2014-4514) (K.L.), UPSC Berzelii Center for Forest
Biotechnology (Vinnova 2012-01560), Kempestiftelserna (JCK-2711) (K.L.) and (JCK-1811)
(E.-M.B., K.L.). The Ministry of Education, Youth and Sports of the Czech Republic
via the European Regional Development Fund-Project “Plants as a tool for sustainable
global development” (CZ.02.1.01/0.0/0.0/16_019/0000827) (O.N., O.P., R.S., V.M.,
L.P., K.D.) and project CEITEC 2020 (LQ1601) (M.P., J.H.) provided support, as did
the Czech Science Foundation via projects GP14-30004P (M.P.) and 16-04184S (O.P.,
K.D., O.N.), Vetenskapsrådet and Vinnova (Verket för Innovationssystem) (T.V., S.R.),
Knut och Alice Wallenbergs Stiftelse via “Shapesystem” grant number 2012.0050. A.J.
was supported by the Austria Science Fund (FWF): I03630 to J.F. The research leading
to these results received funding from European Union’s Horizon 2020 programme (ERC
grant no. 742985) and FWO-FWF joint project G0E5718N to J.F.'
article_number: '4284'
article_processing_charge: No
article_type: original
author:
- first_name: Ioanna
full_name: Antoniadi, Ioanna
last_name: Antoniadi
- first_name: Ondřej
full_name: Novák, Ondřej
last_name: Novák
- first_name: Zuzana
full_name: Gelová, Zuzana
id: 0AE74790-0E0B-11E9-ABC7-1ACFE5697425
last_name: Gelová
orcid: 0000-0003-4783-1752
- first_name: Alexander J
full_name: Johnson, Alexander J
id: 46A62C3A-F248-11E8-B48F-1D18A9856A87
last_name: Johnson
orcid: 0000-0002-2739-8843
- first_name: Ondřej
full_name: Plíhal, Ondřej
last_name: Plíhal
- first_name: Radim
full_name: Simerský, Radim
last_name: Simerský
- first_name: Václav
full_name: Mik, Václav
last_name: Mik
- first_name: Thomas
full_name: Vain, Thomas
last_name: Vain
- first_name: Eduardo
full_name: Mateo-Bonmatí, Eduardo
last_name: Mateo-Bonmatí
- first_name: Michal
full_name: Karady, Michal
last_name: Karady
- first_name: Markéta
full_name: Pernisová, Markéta
last_name: Pernisová
- first_name: Lenka
full_name: Plačková, Lenka
last_name: Plačková
- first_name: Korawit
full_name: Opassathian, Korawit
last_name: Opassathian
- first_name: Jan
full_name: Hejátko, Jan
last_name: Hejátko
- first_name: Stéphanie
full_name: Robert, Stéphanie
last_name: Robert
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Karel
full_name: Doležal, Karel
last_name: Doležal
- first_name: Karin
full_name: Ljung, Karin
last_name: Ljung
- first_name: Colin
full_name: Turnbull, Colin
last_name: Turnbull
citation:
ama: Antoniadi I, Novák O, Gelová Z, et al. Cell-surface receptors enable perception
of extracellular cytokinins. Nature Communications. 2020;11. doi:10.1038/s41467-020-17700-9
apa: Antoniadi, I., Novák, O., Gelová, Z., Johnson, A. J., Plíhal, O., Simerský,
R., … Turnbull, C. (2020). Cell-surface receptors enable perception of extracellular
cytokinins. Nature Communications. Springer Nature. https://doi.org/10.1038/s41467-020-17700-9
chicago: Antoniadi, Ioanna, Ondřej Novák, Zuzana Gelová, Alexander J Johnson, Ondřej
Plíhal, Radim Simerský, Václav Mik, et al. “Cell-Surface Receptors Enable Perception
of Extracellular Cytokinins.” Nature Communications. Springer Nature, 2020.
https://doi.org/10.1038/s41467-020-17700-9.
ieee: I. Antoniadi et al., “Cell-surface receptors enable perception of extracellular
cytokinins,” Nature Communications, vol. 11. Springer Nature, 2020.
ista: Antoniadi I, Novák O, Gelová Z, Johnson AJ, Plíhal O, Simerský R, Mik V, Vain
T, Mateo-Bonmatí E, Karady M, Pernisová M, Plačková L, Opassathian K, Hejátko
J, Robert S, Friml J, Doležal K, Ljung K, Turnbull C. 2020. Cell-surface receptors
enable perception of extracellular cytokinins. Nature Communications. 11, 4284.
mla: Antoniadi, Ioanna, et al. “Cell-Surface Receptors Enable Perception of Extracellular
Cytokinins.” Nature Communications, vol. 11, 4284, Springer Nature, 2020,
doi:10.1038/s41467-020-17700-9.
short: I. Antoniadi, O. Novák, Z. Gelová, A.J. Johnson, O. Plíhal, R. Simerský,
V. Mik, T. Vain, E. Mateo-Bonmatí, M. Karady, M. Pernisová, L. Plačková, K. Opassathian,
J. Hejátko, S. Robert, J. Friml, K. Doležal, K. Ljung, C. Turnbull, Nature Communications
11 (2020).
date_created: 2020-09-06T22:01:13Z
date_published: 2020-08-27T00:00:00Z
date_updated: 2023-08-22T09:10:32Z
day: '27'
ddc:
- '580'
department:
- _id: JiFr
doi: 10.1038/s41467-020-17700-9
ec_funded: 1
external_id:
isi:
- '000567931000001'
file:
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project:
- _id: 26538374-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: I03630
name: Molecular mechanisms of endocytic cargo recognition in plants
- _id: 261099A6-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '742985'
name: Tracing Evolution of Auxin Transport and Polarity in Plants
publication: Nature Communications
publication_identifier:
eissn:
- '20411723'
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Cell-surface receptors enable perception of extracellular cytokinins
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 11
year: '2020'
...
---
_id: '8341'
abstract:
- lang: eng
text: "One of the most striking hallmarks of the eukaryotic cell is the presence
of intracellular vesicles and organelles. Each of these membrane-enclosed compartments
has a distinct composition of lipids and proteins, which is essential for accurate
membrane traffic and homeostasis. Interestingly, their biochemical identities
are achieved with the help\r\nof small GTPases of the Rab family, which cycle
between GDP- and GTP-bound forms on the selected membrane surface. While this
activity switch is well understood for an individual protein, how Rab GTPases
collectively transition between states to generate decisive signal propagation
in space and time is unclear. In my PhD thesis, I present\r\nin vitro reconstitution
experiments with theoretical modeling to systematically study a minimal Rab5 activation
network from bottom-up. We find that positive feedback based on known molecular
interactions gives rise to bistable GTPase activity switching on system’s scale.
Furthermore, we determine that collective transition near the critical\r\npoint
is intrinsically stochastic and provide evidence that the inactive Rab5 abundance
on the membrane can shape the network response. Finally, we demonstrate that collective
switching can spread on the lipid bilayer as a traveling activation wave, representing
a possible emergent activity pattern in endosomal maturation. Together, our\r\nfindings
reveal new insights into the self-organization properties of signaling networks
away from chemical equilibrium. Our work highlights the importance of systematic
characterization of biochemical systems in well-defined physiological conditions.
This way, we were able to answer long-standing open questions in the field and
close the gap between regulatory processes on a molecular scale and emergent responses
on system’s level."
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
- _id: NanoFab
acknowledgement: My thanks goes to the Loose lab members, BioImaging, Life Science
and Nanofabrication Facilities and the wonderful international community at IST
for sharing this experience with me.
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Urban
full_name: Bezeljak, Urban
id: 2A58201A-F248-11E8-B48F-1D18A9856A87
last_name: Bezeljak
orcid: 0000-0003-1365-5631
citation:
ama: Bezeljak U. In vitro reconstitution of a Rab activation switch. 2020. doi:10.15479/AT:ISTA:8341
apa: Bezeljak, U. (2020). In vitro reconstitution of a Rab activation switch.
Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:8341
chicago: Bezeljak, Urban. “In Vitro Reconstitution of a Rab Activation Switch.”
Institute of Science and Technology Austria, 2020. https://doi.org/10.15479/AT:ISTA:8341.
ieee: U. Bezeljak, “In vitro reconstitution of a Rab activation switch,” Institute
of Science and Technology Austria, 2020.
ista: Bezeljak U. 2020. In vitro reconstitution of a Rab activation switch. Institute
of Science and Technology Austria.
mla: Bezeljak, Urban. In Vitro Reconstitution of a Rab Activation Switch.
Institute of Science and Technology Austria, 2020, doi:10.15479/AT:ISTA:8341.
short: U. Bezeljak, In Vitro Reconstitution of a Rab Activation Switch, Institute
of Science and Technology Austria, 2020.
date_created: 2020-09-08T08:53:53Z
date_published: 2020-09-08T00:00:00Z
date_updated: 2023-09-07T13:17:06Z
day: '08'
ddc:
- '570'
degree_awarded: PhD
department:
- _id: MaLo
doi: 10.15479/AT:ISTA:8341
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related_material:
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relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Martin
full_name: Loose, Martin
id: 462D4284-F248-11E8-B48F-1D18A9856A87
last_name: Loose
orcid: 0000-0001-7309-9724
title: In vitro reconstitution of a Rab activation switch
tmp:
image: /images/cc_by_nc_sa.png
legal_code_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC
BY-NC-SA 4.0)
short: CC BY-NC-SA (4.0)
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2020'
...
---
_id: '8350'
abstract:
- lang: eng
text: "Cytoplasm is a gel-like crowded environment composed of tens of thousands
of macromolecules, organelles, cytoskeletal networks and cytosol. The structure
of the cytoplasm is thought to be highly organized and heterogeneous due to the
crowding of its constituents and their effective compartmentalization. In such
an environment, the diffusive dynamics of the molecules is very restricted, an
effect that is further amplified by clustering and anchoring of molecules. Despite
the jammed nature of the cytoplasm at the microscopic scale, large-scale reorganization
of cytoplasm is essential for important cellular functions, such as nuclear positioning
and cell division. How such mesoscale reorganization of the cytoplasm is achieved,
especially for very large cells such as oocytes or syncytial tissues that can
span hundreds of micrometers in size, has only begun to be understood.\r\nIn this
thesis, I focus on the recent advances in elucidating the molecular, cellular
and biophysical principles underlying cytoplasmic organization across different
scales, structures and species. First, I outline which of these principles have
been identified by reductionist approaches, such as in vitro reconstitution assays,
where boundary conditions and components can be modulated at ease. I then describe
how the theoretical and experimental framework established in these reduced systems
have been applied to their more complex in vivo counterparts, in particular oocytes
and embryonic syncytial structures, and discuss how such complex biological systems
can initiate symmetry breaking and establish patterning.\r\nSpecifically, I examine
an example of large-scale reorganizations taking place in zebrafish embryos, where
extensive cytoplasmic streaming leads to the segregation of cytoplasm from yolk
granules along the animal-vegetal axis of the embryo. Using biophysical experimentation
and theory, I investigate the forces underlying this process, to show that this
process does not rely on cortical actin reorganization, as previously thought,
but instead on a cell-cycle-dependent bulk actin polymerization wave traveling
from the animal to the vegetal pole of the embryo. This wave functions in segregation
by both pulling cytoplasm animally and pushing yolk granules vegetally. Cytoplasm
pulling is mediated by bulk actin network flows exerting friction forces on the
cytoplasm, while yolk granule pushing is achieved by a mechanism closely resembling
actin comet formation on yolk granules. This study defines a novel role of bulk
actin polymerization waves in embryo polarization via cytoplasmic segregation.
Lastly, I describe the cytoplasmic reorganizations taking place during zebrafish
oocyte maturation, where the initial segregation of the cytoplasm and yolk granules
occurs. Here, I demonstrate a previously uncharacterized wave of microtubule aster
formation, traveling the oocyte along the animal-vegetal axis. Further research
is required to determine the role of such microtubule structures in cytoplasmic
reorganizations therein.\r\nCollectively, these studies provide further evidence
for the coupling between cell cytoskeleton and cell cycle machinery, which can
underlie a core self-organizing mechanism for orchestrating large-scale reorganizations
in a cell-cycle-tunable manner, where the modulations of the force-generating
machinery and cytoplasmic mechanics can be harbored to fulfill cellular functions."
acknowledged_ssus:
- _id: PreCl
- _id: Bio
- _id: EM-Fac
acknowledgement: "I would have had no fish and hence no results without our wonderful
fish facility crew, Verena Mayer, Eva Schlegl, Andreas Mlak and Matthias Nowak.
Special thanks to Verena for being always happy to help and dealing with our chaotic
schedules in the lab. Danke auch, Verena, für deine Geduld, mit mir auf Deutsch
zu sprechen. Das hat mir sehr geholfen.\r\nSpecial thanks to the Bioimaging and
EM facilities at IST Austria for supporting us every day. Very special thanks would
go to Robert Hauschild for his continuous support on data analysis and also to Jack
Merrin for designing and building microfabricated chambers for the project and for
the various discussions on making zebrafish extracts."
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Shayan
full_name: Shamipour, Shayan
id: 40B34FE2-F248-11E8-B48F-1D18A9856A87
last_name: Shamipour
citation:
ama: Shamipour S. Bulk actin dynamics drive phase segregation in zebrafish oocytes
. 2020. doi:10.15479/AT:ISTA:8350
apa: Shamipour, S. (2020). Bulk actin dynamics drive phase segregation in zebrafish
oocytes . Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:8350
chicago: Shamipour, Shayan. “Bulk Actin Dynamics Drive Phase Segregation in Zebrafish
Oocytes .” Institute of Science and Technology Austria, 2020. https://doi.org/10.15479/AT:ISTA:8350.
ieee: S. Shamipour, “Bulk actin dynamics drive phase segregation in zebrafish oocytes
,” Institute of Science and Technology Austria, 2020.
ista: Shamipour S. 2020. Bulk actin dynamics drive phase segregation in zebrafish
oocytes . Institute of Science and Technology Austria.
mla: Shamipour, Shayan. Bulk Actin Dynamics Drive Phase Segregation in Zebrafish
Oocytes . Institute of Science and Technology Austria, 2020, doi:10.15479/AT:ISTA:8350.
short: S. Shamipour, Bulk Actin Dynamics Drive Phase Segregation in Zebrafish Oocytes
, Institute of Science and Technology Austria, 2020.
date_created: 2020-09-09T11:12:10Z
date_published: 2020-09-09T00:00:00Z
date_updated: 2023-09-27T14:16:45Z
day: '09'
ddc:
- '570'
degree_awarded: PhD
department:
- _id: BjHo
- _id: CaHe
doi: 10.15479/AT:ISTA:8350
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date_created: 2020-09-09T11:06:27Z
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language:
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month: '09'
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page: '107'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '661'
relation: part_of_dissertation
status: public
- id: '6508'
relation: part_of_dissertation
status: public
- id: '7001'
relation: part_of_dissertation
status: public
- id: '735'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
title: 'Bulk actin dynamics drive phase segregation in zebrafish oocytes '
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2020'
...