---
_id: '14361'
abstract:
- lang: eng
text: Whether one considers swarming insects, flocking birds, or bacterial colonies,
collective motion arises from the coordination of individuals and entails the
adjustment of their respective velocities. In particular, in close confinements,
such as those encountered by dense cell populations during development or regeneration,
collective migration can only arise coordinately. Yet, how individuals unify their
velocities is often not understood. Focusing on a finite number of cells in circular
confinements, we identify waves of polymerizing actin that function as a pacemaker
governing the speed of individual cells. We show that the onset of collective
motion coincides with the synchronization of the wave nucleation frequencies across
the population. Employing a simpler and more readily accessible mechanical model
system of active spheres, we identify the synchronization of the individuals’
internal oscillators as one of the essential requirements to reach the corresponding
collective state. The mechanical ‘toy’ experiment illustrates that the global
synchronous state is achieved by nearest neighbor coupling. We suggest by analogy
that local coupling and the synchronization of actin waves are essential for the
emergent, self-organized motion of cell collectives.
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
- _id: M-Shop
acknowledgement: We thank K. O’Keeffe, E. Hannezo, P. Devreotes, C. Dessalles, and
E. Martens for discussion and/or critical reading of the manuscript; the Bioimaging
Facility of ISTA for excellent support, as well as the Life Science Facility and
the Miba Machine Shop of ISTA. This work was supported by the European Research
Council (ERC StG 281556 and CoG 724373) to M.S.
article_number: '5633'
article_processing_charge: Yes
article_type: original
author:
- first_name: Michael
full_name: Riedl, Michael
id: 3BE60946-F248-11E8-B48F-1D18A9856A87
last_name: Riedl
orcid: 0000-0003-4844-6311
- first_name: Isabelle D
full_name: Mayer, Isabelle D
id: 61763940-15b2-11ec-abd3-cfaddfbc66b4
last_name: Mayer
- first_name: Jack
full_name: Merrin, Jack
id: 4515C308-F248-11E8-B48F-1D18A9856A87
last_name: Merrin
orcid: 0000-0001-5145-4609
- first_name: Michael K
full_name: Sixt, Michael K
id: 41E9FBEA-F248-11E8-B48F-1D18A9856A87
last_name: Sixt
orcid: 0000-0002-6620-9179
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Riedl M, Mayer ID, Merrin J, Sixt MK, Hof B. Synchronization in collectively
moving inanimate and living active matter. Nature Communications. 2023;14.
doi:10.1038/s41467-023-41432-1
apa: Riedl, M., Mayer, I. D., Merrin, J., Sixt, M. K., & Hof, B. (2023). Synchronization
in collectively moving inanimate and living active matter. Nature Communications.
Springer Nature. https://doi.org/10.1038/s41467-023-41432-1
chicago: Riedl, Michael, Isabelle D Mayer, Jack Merrin, Michael K Sixt, and Björn
Hof. “Synchronization in Collectively Moving Inanimate and Living Active Matter.”
Nature Communications. Springer Nature, 2023. https://doi.org/10.1038/s41467-023-41432-1.
ieee: M. Riedl, I. D. Mayer, J. Merrin, M. K. Sixt, and B. Hof, “Synchronization
in collectively moving inanimate and living active matter,” Nature Communications,
vol. 14. Springer Nature, 2023.
ista: Riedl M, Mayer ID, Merrin J, Sixt MK, Hof B. 2023. Synchronization in collectively
moving inanimate and living active matter. Nature Communications. 14, 5633.
mla: Riedl, Michael, et al. “Synchronization in Collectively Moving Inanimate and
Living Active Matter.” Nature Communications, vol. 14, 5633, Springer Nature,
2023, doi:10.1038/s41467-023-41432-1.
short: M. Riedl, I.D. Mayer, J. Merrin, M.K. Sixt, B. Hof, Nature Communications
14 (2023).
date_created: 2023-09-24T22:01:10Z
date_published: 2023-09-13T00:00:00Z
date_updated: 2023-12-13T12:29:41Z
day: '13'
ddc:
- '530'
- '570'
department:
- _id: MiSi
- _id: NanoFab
- _id: BjHo
doi: 10.1038/s41467-023-41432-1
ec_funded: 1
external_id:
isi:
- '001087583700030'
pmid:
- '37704595'
file:
- access_level: open_access
checksum: 82d2d4ad736cc8493db8ce45cd313f7b
content_type: application/pdf
creator: dernst
date_created: 2023-09-25T08:32:37Z
date_updated: 2023-09-25T08:32:37Z
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file_size: 2317272
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oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 25A603A2-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '281556'
name: Cytoskeletal force generation and force transduction of migrating leukocytes
- _id: 25FE9508-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '724373'
name: Cellular navigation along spatial gradients
publication: Nature Communications
publication_identifier:
eissn:
- 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Synchronization in collectively moving inanimate and living active matter
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: 14
year: '2023'
...
---
_id: '14530'
abstract:
- lang: eng
text: 'Most motions of many-body systems at any scale in nature with sufficient
degrees of freedom tend to be chaotic; reaching from the orbital motion of planets,
the air currents in our atmosphere, down to the water flowing through our pipelines
or the movement of a population of bacteria. To the observer it is therefore intriguing
when a moving collective exhibits order. Collective motion of flocks of birds,
schools of fish or swarms of self-propelled particles or robots have been studied
extensively over the past decades but the mechanisms involved in the transition
from chaos to order remain unclear. Here, the interactions, that in most systems
give rise to chaos, sustain order. In this thesis we investigate mechanisms that
preserve, destabilize or lead to the ordered state. We show that endothelial cells
migrating in circular confinements transition to a collective rotating state and
concomitantly synchronize the frequencies of nucleating actin waves within individual
cells. Consequently, the frequency dependent cell migration speed uniformizes
across the population. Complementary to the WAVE dependent nucleation of traveling
actin waves, we show that in leukocytes the actin polymerization depending on
WASp generates pushing forces locally at stationary patches. Next, in pipe flows,
we study methods to disrupt the self--sustaining cycle of turbulence and therefore
relaminarize the flow. While we find in pulsating flow conditions that turbulence
emerges through a helical instability during the decelerating phase. Finally,
we show quantitatively in brain slices of mice that wild-type control neurons
can compensate the migratory deficits of a genetically modified neuronal sub--population
in the developing cortex. '
acknowledged_ssus:
- _id: M-Shop
- _id: Bio
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Michael
full_name: Riedl, Michael
id: 3BE60946-F248-11E8-B48F-1D18A9856A87
last_name: Riedl
orcid: 0000-0003-4844-6311
citation:
ama: Riedl M. Synchronization in collectively moving active matter. 2023. doi:10.15479/14530
apa: Riedl, M. (2023). Synchronization in collectively moving active matter.
Institute of Science and Technology Austria. https://doi.org/10.15479/14530
chicago: Riedl, Michael. “Synchronization in Collectively Moving Active Matter.”
Institute of Science and Technology Austria, 2023. https://doi.org/10.15479/14530.
ieee: M. Riedl, “Synchronization in collectively moving active matter,” Institute
of Science and Technology Austria, 2023.
ista: Riedl M. 2023. Synchronization in collectively moving active matter. Institute
of Science and Technology Austria.
mla: Riedl, Michael. Synchronization in Collectively Moving Active Matter.
Institute of Science and Technology Austria, 2023, doi:10.15479/14530.
short: M. Riedl, Synchronization in Collectively Moving Active Matter, Institute
of Science and Technology Austria, 2023.
date_created: 2023-11-15T09:59:03Z
date_published: 2023-11-16T00:00:00Z
date_updated: 2023-11-30T10:55:13Z
day: '16'
ddc:
- '530'
- '570'
degree_awarded: PhD
department:
- _id: GradSch
- _id: MiSi
doi: 10.15479/14530
file:
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checksum: 52e1d0ab6c1abe59c82dfe8c9ff5f83a
content_type: application/pdf
creator: mriedl
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date_updated: 2023-11-15T09:52:54Z
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file_size: 36743942
relation: main_file
success: 1
file_date_updated: 2023-11-15T09:52:54Z
has_accepted_license: '1'
keyword:
- Synchronization
- Collective Movement
- Active Matter
- Cell Migration
- Active Colloids
language:
- iso: eng
month: '11'
oa: 1
oa_version: Updated Version
page: '260'
publication_identifier:
issn:
- 2663 - 337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '10703'
relation: part_of_dissertation
status: public
- id: '10791'
relation: part_of_dissertation
status: public
- id: '7932'
relation: part_of_dissertation
status: public
- id: '461'
relation: part_of_dissertation
status: public
- id: '12726'
relation: old_edition
status: public
status: public
supervisor:
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
title: Synchronization in collectively moving active matter
type: dissertation
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
year: '2023'
...
---
_id: '14555'
abstract:
- lang: eng
text: The intricate regulatory processes behind actin polymerization play a crucial
role in cellular biology, including essential mechanisms such as cell migration
or cell division. However, the self-organizing principles governing actin polymerization
are still poorly understood. In this perspective article, we compare the Belousov-Zhabotinsky
(BZ) reaction, a classic and well understood chemical oscillator known for its
self-organizing spatiotemporal dynamics, with the excitable dynamics of polymerizing
actin. While the BZ reaction originates from the domain of inorganic chemistry,
it shares remarkable similarities with actin polymerization, including the characteristic
propagating waves, which are influenced by geometry and external fields, and the
emergent collective behavior. Starting with a general description of emerging
patterns, we elaborate on single droplets or cell-level dynamics, the influence
of geometric confinements and conclude with collective interactions. Comparing
these two systems sheds light on the universal nature of self-organization principles
in both living and inanimate systems.
acknowledgement: The author(s) declare that no financial support was received for
the research, authorship, and/or publication of this article.
article_number: '1287420'
article_processing_charge: Yes
article_type: original
author:
- first_name: Michael
full_name: Riedl, Michael
id: 3BE60946-F248-11E8-B48F-1D18A9856A87
last_name: Riedl
orcid: 0000-0003-4844-6311
- first_name: Michael K
full_name: Sixt, Michael K
id: 41E9FBEA-F248-11E8-B48F-1D18A9856A87
last_name: Sixt
orcid: 0000-0002-6620-9179
citation:
ama: Riedl M, Sixt MK. The excitable nature of polymerizing actin and the Belousov-Zhabotinsky
reaction. Frontiers in Cell and Developmental Biology. 2023;11. doi:10.3389/fcell.2023.1287420
apa: Riedl, M., & Sixt, M. K. (2023). The excitable nature of polymerizing actin
and the Belousov-Zhabotinsky reaction. Frontiers in Cell and Developmental
Biology. Frontiers. https://doi.org/10.3389/fcell.2023.1287420
chicago: Riedl, Michael, and Michael K Sixt. “The Excitable Nature of Polymerizing
Actin and the Belousov-Zhabotinsky Reaction.” Frontiers in Cell and Developmental
Biology. Frontiers, 2023. https://doi.org/10.3389/fcell.2023.1287420.
ieee: M. Riedl and M. K. Sixt, “The excitable nature of polymerizing actin and the
Belousov-Zhabotinsky reaction,” Frontiers in Cell and Developmental Biology,
vol. 11. Frontiers, 2023.
ista: Riedl M, Sixt MK. 2023. The excitable nature of polymerizing actin and the
Belousov-Zhabotinsky reaction. Frontiers in Cell and Developmental Biology. 11,
1287420.
mla: Riedl, Michael, and Michael K. Sixt. “The Excitable Nature of Polymerizing
Actin and the Belousov-Zhabotinsky Reaction.” Frontiers in Cell and Developmental
Biology, vol. 11, 1287420, Frontiers, 2023, doi:10.3389/fcell.2023.1287420.
short: M. Riedl, M.K. Sixt, Frontiers in Cell and Developmental Biology 11 (2023).
date_created: 2023-11-19T23:00:55Z
date_published: 2023-10-31T00:00:00Z
date_updated: 2023-11-20T08:44:17Z
day: '31'
ddc:
- '570'
department:
- _id: MiSi
doi: 10.3389/fcell.2023.1287420
file:
- access_level: open_access
checksum: 61857fc3ebf019354932e7ee684658ce
content_type: application/pdf
creator: dernst
date_created: 2023-11-20T08:41:15Z
date_updated: 2023-11-20T08:41:15Z
file_id: '14561'
file_name: 2023_FrontiersCellDevBio_Riedl.pdf
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has_accepted_license: '1'
intvolume: ' 11'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
publication: Frontiers in Cell and Developmental Biology
publication_identifier:
eissn:
- 2296-634X
publication_status: published
publisher: Frontiers
quality_controlled: '1'
scopus_import: '1'
status: public
title: The excitable nature of polymerizing actin and the Belousov-Zhabotinsky reaction
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: 11
year: '2023'
...
---
_id: '12726'
abstract:
- lang: eng
text: "Most motions of many-body systems at any scale in nature with sufficient
degrees\r\nof freedom tend to be chaotic; reaching from the orbital motion of
planets, the air\r\ncurrents in our atmosphere, down to the water flowing through
our pipelines or\r\nthe movement of a population of bacteria. To the observer
it is therefore intriguing\r\nwhen a moving collective exhibits order. Collective
motion of flocks of birds, schools\r\nof fish or swarms of self-propelled particles
or robots have been studied extensively\r\nover the past decades but the mechanisms
involved in the transition from chaos to\r\norder remain unclear. Here, the interactions,
that in most systems give rise to chaos,\r\nsustain order. In this thesis we investigate
mechanisms that preserve, destabilize\r\nor lead to the ordered state. We show
that endothelial cells migrating in circular\r\nconfinements transition to a collective
rotating state and concomitantly synchronize\r\nthe frequencies of nucleating
actin waves within individual cells. Consequently,\r\nthe frequency dependent
cell migration speed uniformizes across the population.\r\nComplementary to the
WAVE dependent nucleation of traveling actin waves, we\r\nshow that in leukocytes
the actin polymerization depending on WASp generates\r\npushing forces locally
at stationary patches. Next, in pipe flows, we study methods\r\nto disrupt the
self–sustaining cycle of turbulence and therefore relaminarize the\r\nflow. While
we find in pulsating flow conditions that turbulence emerges through a\r\nhelical
instability during the decelerating phase. Finally, we show quantitatively in\r\nbrain
slices of mice that wild-type control neurons can compensate the migratory\r\ndeficits
of a genetically modified neuronal sub–population in the developing cortex."
acknowledged_ssus:
- _id: M-Shop
- _id: Bio
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Michael
full_name: Riedl, Michael
id: 3BE60946-F248-11E8-B48F-1D18A9856A87
last_name: Riedl
orcid: 0000-0003-4844-6311
citation:
ama: Riedl M. Synchronization in collectively moving active matter. 2023. doi:10.15479/at:ista:12726
apa: Riedl, M. (2023). Synchronization in collectively moving active matter.
Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:12726
chicago: Riedl, Michael. “Synchronization in Collectively Moving Active Matter.”
Institute of Science and Technology Austria, 2023. https://doi.org/10.15479/at:ista:12726.
ieee: M. Riedl, “Synchronization in collectively moving active matter,” Institute
of Science and Technology Austria, 2023.
ista: Riedl M. 2023. Synchronization in collectively moving active matter. Institute
of Science and Technology Austria.
mla: Riedl, Michael. Synchronization in Collectively Moving Active Matter.
Institute of Science and Technology Austria, 2023, doi:10.15479/at:ista:12726.
short: M. Riedl, Synchronization in Collectively Moving Active Matter, Institute
of Science and Technology Austria, 2023.
date_created: 2023-03-15T13:22:13Z
date_published: 2023-03-23T00:00:00Z
date_updated: 2023-11-30T10:55:13Z
day: '23'
ddc:
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degree_awarded: PhD
department:
- _id: GradSch
- _id: BjHo
doi: 10.15479/at:ista:12726
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creator: cchlebak
date_created: 2023-03-23T12:49:23Z
date_updated: 2023-11-24T11:57:46Z
description: the main file is missing the bibliography. See new thesis record 14530
for updated files.
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publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '10703'
relation: part_of_dissertation
status: public
- id: '10791'
relation: part_of_dissertation
status: public
- id: '7932'
relation: part_of_dissertation
status: public
- id: '461'
relation: part_of_dissertation
status: public
- id: '14530'
relation: new_edition
status: public
status: public
supervisor:
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
title: Synchronization in collectively moving active matter
type: dissertation
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
year: '2023'
...
---
_id: '10703'
abstract:
- lang: eng
text: 'When crawling through the body, leukocytes often traverse tissues that are
densely packed with extracellular matrix and other cells, and this raises the
question: How do leukocytes overcome compressive mechanical loads? Here, we show
that the actin cortex of leukocytes is mechanoresponsive and that this responsiveness
requires neither force sensing via the nucleus nor adhesive interactions with
a substrate. Upon global compression of the cell body as well as local indentation
of the plasma membrane, Wiskott-Aldrich syndrome protein (WASp) assembles into
dot-like structures, providing activation platforms for Arp2/3 nucleated actin
patches. These patches locally push against the external load, which can be obstructing
collagen fibers or other cells, and thereby create space to facilitate forward
locomotion. We show in vitro and in vivo that this WASp function is rate limiting
for ameboid leukocyte migration in dense but not in loose environments and is
required for trafficking through diverse tissues such as skin and lymph nodes.'
acknowledged_ssus:
- _id: LifeSc
- _id: Bio
- _id: EM-Fac
acknowledgement: We thank N. Darwish-Miranda, F. Leite, F.P. Assen, and A. Eichner
for advice and help with experiments. We thank J. Renkawitz, E. Kiermaier, A. Juanes
Garcia, and M. Avellaneda for critical reading of the manuscript. We thank M. Driscoll
for advice on fluorescent labeling of collagen gels. This research was supported
by the Scientific Service Units (SSUs) of IST Austria through resources provided
by Molecular Biology Services/Lab Support Facility (LSF)/Bioimaging Facility/Electron
Microscopy Facility. This work was funded by grants from the European Research Council
( CoG 724373 ) and the Austrian Science Foundation (FWF) to M.S. F.G. received funding
from the European Union’s Horizon 2020 research and innovation program under the
Marie Skłodowska-Curie grant agreement no. 747687.
article_processing_charge: No
article_type: original
author:
- first_name: Florian
full_name: Gaertner, Florian
last_name: Gaertner
- first_name: Patricia
full_name: Reis-Rodrigues, Patricia
last_name: Reis-Rodrigues
- first_name: Ingrid
full_name: De Vries, Ingrid
id: 4C7D837E-F248-11E8-B48F-1D18A9856A87
last_name: De Vries
- first_name: Miroslav
full_name: Hons, Miroslav
id: 4167FE56-F248-11E8-B48F-1D18A9856A87
last_name: Hons
orcid: 0000-0002-6625-3348
- first_name: Juan
full_name: Aguilera, Juan
last_name: Aguilera
- first_name: Michael
full_name: Riedl, Michael
id: 3BE60946-F248-11E8-B48F-1D18A9856A87
last_name: Riedl
orcid: 0000-0003-4844-6311
- 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: Saren
full_name: Tasciyan, Saren
id: 4323B49C-F248-11E8-B48F-1D18A9856A87
last_name: Tasciyan
orcid: 0000-0003-1671-393X
- first_name: Aglaja
full_name: Kopf, Aglaja
id: 31DAC7B6-F248-11E8-B48F-1D18A9856A87
last_name: Kopf
orcid: 0000-0002-2187-6656
- first_name: Jack
full_name: Merrin, Jack
id: 4515C308-F248-11E8-B48F-1D18A9856A87
last_name: Merrin
orcid: 0000-0001-5145-4609
- first_name: Vanessa
full_name: Zheden, Vanessa
id: 39C5A68A-F248-11E8-B48F-1D18A9856A87
last_name: Zheden
orcid: 0000-0002-9438-4783
- first_name: Walter
full_name: Kaufmann, Walter
id: 3F99E422-F248-11E8-B48F-1D18A9856A87
last_name: Kaufmann
orcid: 0000-0001-9735-5315
- first_name: Robert
full_name: Hauschild, Robert
id: 4E01D6B4-F248-11E8-B48F-1D18A9856A87
last_name: Hauschild
orcid: 0000-0001-9843-3522
- first_name: Michael K
full_name: Sixt, Michael K
id: 41E9FBEA-F248-11E8-B48F-1D18A9856A87
last_name: Sixt
orcid: 0000-0002-6620-9179
citation:
ama: Gaertner F, Reis-Rodrigues P, de Vries I, et al. WASp triggers mechanosensitive
actin patches to facilitate immune cell migration in dense tissues. Developmental
Cell. 2022;57(1):47-62.e9. doi:10.1016/j.devcel.2021.11.024
apa: Gaertner, F., Reis-Rodrigues, P., de Vries, I., Hons, M., Aguilera, J., Riedl,
M., … Sixt, M. K. (2022). WASp triggers mechanosensitive actin patches to facilitate
immune cell migration in dense tissues. Developmental Cell. Cell Press ;
Elsevier. https://doi.org/10.1016/j.devcel.2021.11.024
chicago: Gaertner, Florian, Patricia Reis-Rodrigues, Ingrid de Vries, Miroslav Hons,
Juan Aguilera, Michael Riedl, Alexander F Leithner, et al. “WASp Triggers Mechanosensitive
Actin Patches to Facilitate Immune Cell Migration in Dense Tissues.” Developmental
Cell. Cell Press ; Elsevier, 2022. https://doi.org/10.1016/j.devcel.2021.11.024.
ieee: F. Gaertner et al., “WASp triggers mechanosensitive actin patches to
facilitate immune cell migration in dense tissues,” Developmental Cell,
vol. 57, no. 1. Cell Press ; Elsevier, p. 47–62.e9, 2022.
ista: Gaertner F, Reis-Rodrigues P, de Vries I, Hons M, Aguilera J, Riedl M, Leithner
AF, Tasciyan S, Kopf A, Merrin J, Zheden V, Kaufmann W, Hauschild R, Sixt MK.
2022. WASp triggers mechanosensitive actin patches to facilitate immune cell migration
in dense tissues. Developmental Cell. 57(1), 47–62.e9.
mla: Gaertner, Florian, et al. “WASp Triggers Mechanosensitive Actin Patches to
Facilitate Immune Cell Migration in Dense Tissues.” Developmental Cell,
vol. 57, no. 1, Cell Press ; Elsevier, 2022, p. 47–62.e9, doi:10.1016/j.devcel.2021.11.024.
short: F. Gaertner, P. Reis-Rodrigues, I. de Vries, M. Hons, J. Aguilera, M. Riedl,
A.F. Leithner, S. Tasciyan, A. Kopf, J. Merrin, V. Zheden, W. Kaufmann, R. Hauschild,
M.K. Sixt, Developmental Cell 57 (2022) 47–62.e9.
date_created: 2022-01-30T23:01:33Z
date_published: 2022-01-10T00:00:00Z
date_updated: 2024-03-25T23:30:12Z
day: '10'
ddc:
- '570'
department:
- _id: MiSi
- _id: EM-Fac
- _id: NanoFab
- _id: BjHo
doi: 10.1016/j.devcel.2021.11.024
ec_funded: 1
external_id:
isi:
- '000768933800005'
pmid:
- '34919802'
intvolume: ' 57'
isi: 1
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.sciencedirect.com/science/article/pii/S1534580721009497
month: '01'
oa: 1
oa_version: Published Version
page: 47-62.e9
pmid: 1
project:
- _id: 260AA4E2-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '747687'
name: Mechanical Adaptation of Lamellipodial Actin Networks in Migrating Cells
- _id: 25FE9508-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '724373'
name: Cellular navigation along spatial gradients
publication: Developmental Cell
publication_identifier:
eissn:
- 1878-1551
issn:
- 1534-5807
publication_status: published
publisher: Cell Press ; Elsevier
quality_controlled: '1'
related_material:
record:
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relation: dissertation_contains
status: public
- id: '14530'
relation: dissertation_contains
status: public
- id: '12401'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: WASp triggers mechanosensitive actin patches to facilitate immune cell migration
in dense tissues
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: 57
year: '2022'
...
---
_id: '10791'
abstract:
- lang: eng
text: The mammalian neocortex is composed of diverse neuronal and glial cell classes
that broadly arrange in six distinct laminae. Cortical layers emerge during development
and defects in the developmental programs that orchestrate cortical lamination
are associated with neurodevelopmental diseases. The developmental principle of
cortical layer formation depends on concerted radial projection neuron migration,
from their birthplace to their final target position. Radial migration occurs
in defined sequential steps, regulated by a large array of signaling pathways.
However, based on genetic loss-of-function experiments, most studies have thus
far focused on the role of cell-autonomous gene function. Yet, cortical neuron
migration in situ is a complex process and migrating neurons traverse along diverse
cellular compartments and environments. The role of tissue-wide properties and
genetic state in radial neuron migration is however not clear. Here we utilized
mosaic analysis with double markers (MADM) technology to either sparsely or globally
delete gene function, followed by quantitative single-cell phenotyping. The MADM-based
gene ablation paradigms in combination with computational modeling demonstrated
that global tissue-wide effects predominate cell-autonomous gene function albeit
in a gene-specific manner. Our results thus suggest that the genetic landscape
in a tissue critically affects the overall migration phenotype of individual cortical
projection neurons. In a broader context, our findings imply that global tissue-wide
effects represent an essential component of the underlying etiology associated
with focal malformations of cortical development in particular, and neurological
diseases in general.
acknowledged_ssus:
- _id: LifeSc
- _id: PreCl
- _id: Bio
acknowledgement: "A.H.H. was a recipient of a DOC Fellowship (24812) of the Austrian
Academy of Sciences. This work also received support from IST Austria institutional
funds; 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.\r\nAPC
funding was obtained by IST Austria institutional funds.\r\nWe thank A. Sommer and
C. Czepe (VBCF GmbH, NGS Unit), L. Andersen, J. Sonntag and J. Renno for technical
support and/or initial experiments; M. Sixt, J. Nimpf and all members of the Hippenmeyer
lab for discussion. This research was supported by the Scientific Service Units
of IST Austria through resources provided by the Imaging and Optics Facility, Lab
Support Facility and Preclinical Facility."
article_number: kvac009
article_processing_charge: No
article_type: original
author:
- first_name: Andi H
full_name: Hansen, Andi H
id: 38853E16-F248-11E8-B48F-1D18A9856A87
last_name: Hansen
- first_name: Florian
full_name: Pauler, Florian
id: 48EA0138-F248-11E8-B48F-1D18A9856A87
last_name: Pauler
orcid: 0000-0002-7462-0048
- first_name: Michael
full_name: Riedl, Michael
id: 3BE60946-F248-11E8-B48F-1D18A9856A87
last_name: Riedl
orcid: 0000-0003-4844-6311
- 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: Susanne
full_name: Laukoter, Susanne
id: 2D6B7A9A-F248-11E8-B48F-1D18A9856A87
last_name: Laukoter
orcid: 0000-0002-7903-3010
- first_name: Christoph M
full_name: Sommer, Christoph M
id: 4DF26D8C-F248-11E8-B48F-1D18A9856A87
last_name: Sommer
orcid: 0000-0003-1216-9105
- first_name: Armel
full_name: Nicolas, Armel
id: 2A103192-F248-11E8-B48F-1D18A9856A87
last_name: Nicolas
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
- first_name: Li Huei
full_name: Tsai, Li Huei
last_name: Tsai
- 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: Hansen AH, Pauler F, Riedl M, et al. Tissue-wide effects override cell-intrinsic
gene function in radial neuron migration. Oxford Open Neuroscience. 2022;1(1).
doi:10.1093/oons/kvac009
apa: Hansen, A. H., Pauler, F., Riedl, M., Streicher, C., Heger, A.-M., Laukoter,
S., … Hippenmeyer, S. (2022). Tissue-wide effects override cell-intrinsic gene
function in radial neuron migration. Oxford Open Neuroscience. Oxford Academic.
https://doi.org/10.1093/oons/kvac009
chicago: Hansen, Andi H, Florian Pauler, Michael Riedl, Carmen Streicher, Anna-Magdalena
Heger, Susanne Laukoter, Christoph M Sommer, et al. “Tissue-Wide Effects Override
Cell-Intrinsic Gene Function in Radial Neuron Migration.” Oxford Open Neuroscience.
Oxford Academic, 2022. https://doi.org/10.1093/oons/kvac009.
ieee: A. H. Hansen et al., “Tissue-wide effects override cell-intrinsic gene
function in radial neuron migration,” Oxford Open Neuroscience, vol. 1,
no. 1. Oxford Academic, 2022.
ista: Hansen AH, Pauler F, Riedl M, Streicher C, Heger A-M, Laukoter S, Sommer CM,
Nicolas A, Hof B, Tsai LH, Rülicke T, Hippenmeyer S. 2022. Tissue-wide effects
override cell-intrinsic gene function in radial neuron migration. Oxford Open
Neuroscience. 1(1), kvac009.
mla: Hansen, Andi H., et al. “Tissue-Wide Effects Override Cell-Intrinsic Gene Function
in Radial Neuron Migration.” Oxford Open Neuroscience, vol. 1, no. 1, kvac009,
Oxford Academic, 2022, doi:10.1093/oons/kvac009.
short: A.H. Hansen, F. Pauler, M. Riedl, C. Streicher, A.-M. Heger, S. Laukoter,
C.M. Sommer, A. Nicolas, B. Hof, L.H. Tsai, T. Rülicke, S. Hippenmeyer, Oxford
Open Neuroscience 1 (2022).
date_created: 2022-02-25T07:52:11Z
date_published: 2022-07-07T00:00:00Z
date_updated: 2023-11-30T10:55:12Z
day: '07'
ddc:
- '570'
department:
- _id: SiHi
- _id: BjHo
- _id: LifeSc
- _id: EM-Fac
doi: 10.1093/oons/kvac009
ec_funded: 1
file:
- access_level: open_access
checksum: 822e76e056c07099d1fb27d1ece5941b
content_type: application/pdf
creator: dernst
date_created: 2023-08-16T08:00:30Z
date_updated: 2023-08-16T08:00:30Z
file_id: '14061'
file_name: 2023_OxfordOpenNeuroscience_Hansen.pdf
file_size: 4846551
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has_accepted_license: '1'
intvolume: ' 1'
issue: '1'
language:
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month: '07'
oa: 1
oa_version: Published Version
project:
- _id: 25D61E48-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '618444'
name: Molecular Mechanisms of Cerebral Cortex Development
- _id: 2625A13E-B435-11E9-9278-68D0E5697425
grant_number: '24812'
name: Molecular Mechanisms of Radial Neuronal Migration
publication: Oxford Open Neuroscience
publication_identifier:
eissn:
- 2753-149X
publication_status: published
publisher: Oxford Academic
quality_controlled: '1'
related_material:
record:
- id: '12726'
relation: dissertation_contains
status: public
- id: '14530'
relation: dissertation_contains
status: public
status: public
title: Tissue-wide effects override cell-intrinsic gene function in radial neuron
migration
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: 1
year: '2022'
...
---
_id: '7932'
abstract:
- lang: eng
text: Pulsating flows through tubular geometries are laminar provided that velocities
are moderate. This in particular is also believed to apply to cardiovascular flows
where inertial forces are typically too low to sustain turbulence. On the other
hand, flow instabilities and fluctuating shear stresses are held responsible for
a variety of cardiovascular diseases. Here we report a nonlinear instability mechanism
for pulsating pipe flow that gives rise to bursts of turbulence at low flow rates.
Geometrical distortions of small, yet finite, amplitude are found to excite a
state consisting of helical vortices during flow deceleration. The resulting flow
pattern grows rapidly in magnitude, breaks down into turbulence, and eventually
returns to laminar when the flow accelerates. This scenario causes shear stress
fluctuations and flow reversal during each pulsation cycle. Such unsteady conditions
can adversely affect blood vessels and have been shown to promote inflammation
and dysfunction of the shear stress-sensitive endothelial cell layer.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Duo
full_name: Xu, Duo
id: 3454D55E-F248-11E8-B48F-1D18A9856A87
last_name: Xu
- first_name: Atul
full_name: Varshney, Atul
id: 2A2006B2-F248-11E8-B48F-1D18A9856A87
last_name: Varshney
orcid: 0000-0002-3072-5999
- first_name: Xingyu
full_name: Ma, Xingyu
id: 34BADBA6-F248-11E8-B48F-1D18A9856A87
last_name: Ma
orcid: 0000-0002-0179-9737
- first_name: Baofang
full_name: Song, Baofang
last_name: Song
- first_name: Michael
full_name: Riedl, Michael
id: 3BE60946-F248-11E8-B48F-1D18A9856A87
last_name: Riedl
orcid: 0000-0003-4844-6311
- first_name: Marc
full_name: Avila, Marc
last_name: Avila
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Xu D, Varshney A, Ma X, et al. Nonlinear hydrodynamic instability and turbulence
in pulsatile flow. Proceedings of the National Academy of Sciences of the United
States of America. 2020;117(21):11233-11239. doi:10.1073/pnas.1913716117
apa: Xu, D., Varshney, A., Ma, X., Song, B., Riedl, M., Avila, M., & Hof, B.
(2020). Nonlinear hydrodynamic instability and turbulence in pulsatile flow. Proceedings
of the National Academy of Sciences of the United States of America. National
Academy of Sciences. https://doi.org/10.1073/pnas.1913716117
chicago: Xu, Duo, Atul Varshney, Xingyu Ma, Baofang Song, Michael Riedl, Marc Avila,
and Björn Hof. “Nonlinear Hydrodynamic Instability and Turbulence in Pulsatile
Flow.” Proceedings of the National Academy of Sciences of the United States
of America. National Academy of Sciences, 2020. https://doi.org/10.1073/pnas.1913716117.
ieee: D. Xu et al., “Nonlinear hydrodynamic instability and turbulence in
pulsatile flow,” Proceedings of the National Academy of Sciences of the United
States of America, vol. 117, no. 21. National Academy of Sciences, pp. 11233–11239,
2020.
ista: Xu D, Varshney A, Ma X, Song B, Riedl M, Avila M, Hof B. 2020. Nonlinear hydrodynamic
instability and turbulence in pulsatile flow. Proceedings of the National Academy
of Sciences of the United States of America. 117(21), 11233–11239.
mla: Xu, Duo, et al. “Nonlinear Hydrodynamic Instability and Turbulence in Pulsatile
Flow.” Proceedings of the National Academy of Sciences of the United States
of America, vol. 117, no. 21, National Academy of Sciences, 2020, pp. 11233–39,
doi:10.1073/pnas.1913716117.
short: D. Xu, A. Varshney, X. Ma, B. Song, M. Riedl, M. Avila, B. Hof, Proceedings
of the National Academy of Sciences of the United States of America 117 (2020)
11233–11239.
date_created: 2020-06-07T22:00:51Z
date_published: 2020-05-26T00:00:00Z
date_updated: 2023-11-30T10:55:13Z
day: '26'
department:
- _id: BjHo
doi: 10.1073/pnas.1913716117
ec_funded: 1
external_id:
arxiv:
- '2005.11190'
isi:
- '000536797100014'
intvolume: ' 117'
isi: 1
issue: '21'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2005.11190
month: '05'
oa: 1
oa_version: Preprint
page: 11233-11239
project:
- _id: 238B8092-32DE-11EA-91FC-C7463DDC885E
call_identifier: FWF
grant_number: I04188
name: Instabilities in pulsating pipe flow of Newtonian and complex fluids
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
publication: Proceedings of the National Academy of Sciences of the United States
of America
publication_identifier:
eissn:
- '10916490'
issn:
- '00278424'
publication_status: published
publisher: National Academy of Sciences
quality_controlled: '1'
related_material:
link:
- description: News on IST Homepage
relation: press_release
url: https://ist.ac.at/en/news/blood-flows-more-turbulent-than-previously-expected/
record:
- id: '12726'
relation: dissertation_contains
status: public
- id: '14530'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Nonlinear hydrodynamic instability and turbulence in pulsatile flow
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 117
year: '2020'
...
---
_id: '461'
abstract:
- lang: eng
text: Turbulence is the major cause of friction losses in transport processes and
it is responsible for a drastic drag increase in flows over bounding surfaces.
While much effort is invested into developing ways to control and reduce turbulence
intensities, so far no methods exist to altogether eliminate turbulence if velocities
are sufficiently large. We demonstrate for pipe flow that appropriate distortions
to the velocity profile lead to a complete collapse of turbulence and subsequently
friction losses are reduced by as much as 90%. Counterintuitively, the return
to laminar motion is accomplished by initially increasing turbulence intensities
or by transiently amplifying wall shear. Since neither the Reynolds number nor
the shear stresses decrease (the latter often increase), these measures are not
indicative of turbulence collapse. Instead, an amplification mechanism measuring
the interaction between eddies and the mean shear is found to set a threshold
below which turbulence is suppressed beyond recovery.
acknowledgement: We acknowledge the European Research Council under the European Union’s
Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement 306589, the European
Research Council (ERC) under the European Union’s Horizon 2020 research and innovation
programme (grant agreement no. 737549) and the Deutsche Forschungsgemeinschaft (Project
No. FOR 1182) for financial support. We thank our technician P. Maier for providing
highly valuable ideas and greatly supporting us in all technical aspects. We thank
M. Schaner for technical drawings, construction and design. We thank M. Schwegel
for a Matlab code to post-process experimental data.
article_processing_charge: No
author:
- first_name: Jakob
full_name: Kühnen, Jakob
id: 3A47AE32-F248-11E8-B48F-1D18A9856A87
last_name: Kühnen
orcid: 0000-0003-4312-0179
- first_name: Baofang
full_name: Song, Baofang
last_name: Song
- first_name: Davide
full_name: Scarselli, Davide
id: 40315C30-F248-11E8-B48F-1D18A9856A87
last_name: Scarselli
orcid: 0000-0001-5227-4271
- first_name: Nazmi B
full_name: Budanur, Nazmi B
id: 3EA1010E-F248-11E8-B48F-1D18A9856A87
last_name: Budanur
orcid: 0000-0003-0423-5010
- first_name: Michael
full_name: Riedl, Michael
id: 3BE60946-F248-11E8-B48F-1D18A9856A87
last_name: Riedl
orcid: 0000-0003-4844-6311
- first_name: Ashley
full_name: Willis, Ashley
last_name: Willis
- first_name: Marc
full_name: Avila, Marc
last_name: Avila
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Kühnen J, Song B, Scarselli D, et al. Destabilizing turbulence in pipe flow.
Nature Physics. 2018;14:386-390. doi:10.1038/s41567-017-0018-3
apa: Kühnen, J., Song, B., Scarselli, D., Budanur, N. B., Riedl, M., Willis, A.,
… Hof, B. (2018). Destabilizing turbulence in pipe flow. Nature Physics.
Nature Publishing Group. https://doi.org/10.1038/s41567-017-0018-3
chicago: Kühnen, Jakob, Baofang Song, Davide Scarselli, Nazmi B Budanur, Michael
Riedl, Ashley Willis, Marc Avila, and Björn Hof. “Destabilizing Turbulence in
Pipe Flow.” Nature Physics. Nature Publishing Group, 2018. https://doi.org/10.1038/s41567-017-0018-3.
ieee: J. Kühnen et al., “Destabilizing turbulence in pipe flow,” Nature
Physics, vol. 14. Nature Publishing Group, pp. 386–390, 2018.
ista: Kühnen J, Song B, Scarselli D, Budanur NB, Riedl M, Willis A, Avila M, Hof
B. 2018. Destabilizing turbulence in pipe flow. Nature Physics. 14, 386–390.
mla: Kühnen, Jakob, et al. “Destabilizing Turbulence in Pipe Flow.” Nature Physics,
vol. 14, Nature Publishing Group, 2018, pp. 386–90, doi:10.1038/s41567-017-0018-3.
short: J. Kühnen, B. Song, D. Scarselli, N.B. Budanur, M. Riedl, A. Willis, M. Avila,
B. Hof, Nature Physics 14 (2018) 386–390.
date_created: 2018-12-11T11:46:36Z
date_published: 2018-01-08T00:00:00Z
date_updated: 2024-03-25T23:30:20Z
day: '08'
department:
- _id: BjHo
doi: 10.1038/s41567-017-0018-3
ec_funded: 1
external_id:
isi:
- '000429434100020'
intvolume: ' 14'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1711.06543
month: '01'
oa: 1
oa_version: Preprint
page: 386-390
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
- _id: 25104D44-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '737549'
name: Eliminating turbulence in oil pipelines
publication: Nature Physics
publication_status: published
publisher: Nature Publishing Group
publist_id: '7360'
quality_controlled: '1'
related_material:
record:
- id: '12726'
relation: dissertation_contains
status: public
- id: '14530'
relation: dissertation_contains
status: public
- id: '7258'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Destabilizing turbulence in pipe flow
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 14
year: '2018'
...