---
_id: '14827'
abstract:
- lang: eng
  text: Understanding complex living systems, which are fundamentally constrained
    by physical phenomena, requires combining experimental data with theoretical physical
    and mathematical models. To develop such models, collaborations between experimental
    cell biologists and theoreticians are increasingly important but these two groups
    often face challenges achieving mutual understanding. To help navigate these challenges,
    this Perspective discusses different modelling approaches, including bottom-up
    hypothesis-driven and top-down data-driven models, and highlights their strengths
    and applications. Using cell mechanics as an example, we explore the integration
    of specific physical models with experimental data from the molecular, cellular
    and tissue level up to multiscale input. We also emphasize the importance of constraining
    model complexity and outline strategies for crosstalk between experimental design
    and model development. Furthermore, we highlight how physical models can provide
    conceptual insights and produce unifying and generalizable frameworks for biological
    phenomena. Overall, this Perspective aims to promote fruitful collaborations that
    advance our understanding of complex biological systems.
acknowledgement: "We thank Prisca Liberali and Edouard Hannezo for many inspiring
  discussions; Mehmet Can Uçar, Nicoletta I Petridou and Qiutan Yang for a critical
  reading of the manuscript, and Claudia Flandoli for the artwork in Figs 2 and 3.
  We would also like to thank The Company of Biologists for the opportunity to attend
  the 2023 workshop on Collective Cell Migration, and all workshop participants for
  discussions.\r\nC.S. was supported by a European Molecular Biology Organization
  (EMBO) Postdoctoral Fellowship (ALTF 660-2020) and Human Frontier Science Program
  (HFSP) Postdoctoral fellowship (LT000746/2021-L). D.B.B. was supported by the NOMIS
  Foundation as a NOMIS Fellow and by an EMBO Postdoctoral Fellowship (ALTF 343-2022)."
article_number: jcs.261515
article_processing_charge: No
article_type: original
author:
- first_name: Cornelia
  full_name: Schwayer, Cornelia
  id: 3436488C-F248-11E8-B48F-1D18A9856A87
  last_name: Schwayer
  orcid: 0000-0001-5130-2226
- first_name: David
  full_name: Brückner, David
  id: e1e86031-6537-11eb-953a-f7ab92be508d
  last_name: Brückner
  orcid: 0000-0001-7205-2975
citation:
  ama: Schwayer C, Brückner D. Connecting theory and experiment in cell and tissue
    mechanics. <i>Journal of Cell Science</i>. 2023;136(24). doi:<a href="https://doi.org/10.1242/jcs.261515">10.1242/jcs.261515</a>
  apa: Schwayer, C., &#38; Brückner, D. (2023). Connecting theory and experiment in
    cell and tissue mechanics. <i>Journal of Cell Science</i>. The Company of Biologists.
    <a href="https://doi.org/10.1242/jcs.261515">https://doi.org/10.1242/jcs.261515</a>
  chicago: Schwayer, Cornelia, and David Brückner. “Connecting Theory and Experiment
    in Cell and Tissue Mechanics.” <i>Journal of Cell Science</i>. The Company of
    Biologists, 2023. <a href="https://doi.org/10.1242/jcs.261515">https://doi.org/10.1242/jcs.261515</a>.
  ieee: C. Schwayer and D. Brückner, “Connecting theory and experiment in cell and
    tissue mechanics,” <i>Journal of Cell Science</i>, vol. 136, no. 24. The Company
    of Biologists, 2023.
  ista: Schwayer C, Brückner D. 2023. Connecting theory and experiment in cell and
    tissue mechanics. Journal of Cell Science. 136(24), jcs. 261515.
  mla: Schwayer, Cornelia, and David Brückner. “Connecting Theory and Experiment in
    Cell and Tissue Mechanics.” <i>Journal of Cell Science</i>, vol. 136, no. 24,
    jcs. 261515, The Company of Biologists, 2023, doi:<a href="https://doi.org/10.1242/jcs.261515">10.1242/jcs.261515</a>.
  short: C. Schwayer, D. Brückner, Journal of Cell Science 136 (2023).
date_created: 2024-01-17T12:46:55Z
date_published: 2023-12-27T00:00:00Z
date_updated: 2024-01-22T13:35:48Z
day: '27'
department:
- _id: EdHa
- _id: CaHe
doi: 10.1242/jcs.261515
external_id:
  pmid:
  - '38149871'
intvolume: '       136'
issue: '24'
keyword:
- Cell Biology
language:
- iso: eng
month: '12'
oa_version: None
pmid: 1
project:
- _id: 34e2a5b5-11ca-11ed-8bc3-b2265616ef0b
  grant_number: 343-2022
  name: A mechano-chemical theory for stem cell fate decisions in organoid development
publication: Journal of Cell Science
publication_identifier:
  eissn:
  - 1477-9137
  issn:
  - 0021-9533
publication_status: published
publisher: The Company of Biologists
quality_controlled: '1'
scopus_import: '1'
status: public
title: Connecting theory and experiment in cell and tissue mechanics
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 136
year: '2023'
...
---
_id: '14082'
abstract:
- lang: eng
  text: Epithelial barrier function is commonly analyzed using transepithelial electrical
    resistance, which measures ion flux across a monolayer, or by adding traceable
    macromolecules and monitoring their passage across the monolayer. Although these
    methods measure changes in global barrier function, they lack the sensitivity
    needed to detect local or transient barrier breaches, and they do not reveal the
    location of barrier leaks. Therefore, we previously developed a method that we
    named the zinc-based ultrasensitive microscopic barrier assay (ZnUMBA), which
    overcomes these limitations, allowing for detection of local tight junction leaks
    with high spatiotemporal resolution. Here, we present expanded applications for
    ZnUMBA. ZnUMBA can be used in Xenopus embryos to measure the dynamics of barrier
    restoration and actin accumulation following laser injury. ZnUMBA can also be
    effectively utilized in developing zebrafish embryos as well as cultured monolayers
    of Madin–Darby canine kidney (MDCK) II epithelial cells. ZnUMBA is a powerful
    and flexible method that, with minimal optimization, can be applied to multiple
    systems to measure dynamic changes in barrier function with spatiotemporal precision.
acknowledged_ssus:
- _id: PreCl
- _id: Bio
acknowledgement: "The authors thank their respective lab members for feedback and
  helpful discussions. We thank the bioimaging and zebrafish facilities of IST Austria
  for their support.\r\nThis work was supported by the National Institutes of Health
  [R01GM112794 to A.L.M.], by Grants-in-Aid for Scientific Research from the Japan
  Society for the Promotion of Science [21K06156 to T.H.], by the Grant Program for
  Biomedical Engineering Research from the Nakatani Foundation for Advancement of
  Measuring Technologies in Biomedical Engineering [to T.H.] and by funding from the
  European Research Council [advanced grant 742573 to C.-P.H.]. "
article_number: jcs260668
article_processing_charge: No
article_type: original
author:
- first_name: Tomohito
  full_name: Higashi, Tomohito
  last_name: Higashi
- first_name: Rachel E.
  full_name: Stephenson, Rachel E.
  last_name: Stephenson
- first_name: Cornelia
  full_name: Schwayer, Cornelia
  id: 3436488C-F248-11E8-B48F-1D18A9856A87
  last_name: Schwayer
  orcid: 0000-0001-5130-2226
- first_name: Karla
  full_name: Huljev, Karla
  id: 44C6F6A6-F248-11E8-B48F-1D18A9856A87
  last_name: Huljev
- first_name: Atsuko Y.
  full_name: Higashi, Atsuko Y.
  last_name: Higashi
- 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: Hideki
  full_name: Chiba, Hideki
  last_name: Chiba
- first_name: Ann L.
  full_name: Miller, Ann L.
  last_name: Miller
citation:
  ama: Higashi T, Stephenson RE, Schwayer C, et al. ZnUMBA - a live imaging method
    to detect local barrier breaches. <i>Journal of Cell Science</i>. 2023;136(15).
    doi:<a href="https://doi.org/10.1242/jcs.260668">10.1242/jcs.260668</a>
  apa: Higashi, T., Stephenson, R. E., Schwayer, C., Huljev, K., Higashi, A. Y., Heisenberg,
    C.-P. J., … Miller, A. L. (2023). ZnUMBA - a live imaging method to detect local
    barrier breaches. <i>Journal of Cell Science</i>. The Company of Biologists. <a
    href="https://doi.org/10.1242/jcs.260668">https://doi.org/10.1242/jcs.260668</a>
  chicago: Higashi, Tomohito, Rachel E. Stephenson, Cornelia Schwayer, Karla Huljev,
    Atsuko Y. Higashi, Carl-Philipp J Heisenberg, Hideki Chiba, and Ann L. Miller.
    “ZnUMBA - a Live Imaging Method to Detect Local Barrier Breaches.” <i>Journal
    of Cell Science</i>. The Company of Biologists, 2023. <a href="https://doi.org/10.1242/jcs.260668">https://doi.org/10.1242/jcs.260668</a>.
  ieee: T. Higashi <i>et al.</i>, “ZnUMBA - a live imaging method to detect local
    barrier breaches,” <i>Journal of Cell Science</i>, vol. 136, no. 15. The Company
    of Biologists, 2023.
  ista: Higashi T, Stephenson RE, Schwayer C, Huljev K, Higashi AY, Heisenberg C-PJ,
    Chiba H, Miller AL. 2023. ZnUMBA - a live imaging method to detect local barrier
    breaches. Journal of Cell Science. 136(15), jcs260668.
  mla: Higashi, Tomohito, et al. “ZnUMBA - a Live Imaging Method to Detect Local Barrier
    Breaches.” <i>Journal of Cell Science</i>, vol. 136, no. 15, jcs260668, The Company
    of Biologists, 2023, doi:<a href="https://doi.org/10.1242/jcs.260668">10.1242/jcs.260668</a>.
  short: T. Higashi, R.E. Stephenson, C. Schwayer, K. Huljev, A.Y. Higashi, C.-P.J.
    Heisenberg, H. Chiba, A.L. Miller, Journal of Cell Science 136 (2023).
date_created: 2023-08-20T22:01:13Z
date_published: 2023-08-01T00:00:00Z
date_updated: 2023-12-13T12:11:18Z
day: '01'
ddc:
- '570'
department:
- _id: CaHe
- _id: EvBe
doi: 10.1242/jcs.260668
ec_funded: 1
external_id:
  isi:
  - '001070149000001'
file:
- access_level: closed
  checksum: a399389b7e3d072f1788b63e612a10b3
  content_type: application/pdf
  creator: dernst
  date_created: 2023-08-21T07:37:54Z
  date_updated: 2023-08-21T07:37:54Z
  embargo: 2024-08-10
  embargo_to: open_access
  file_id: '14092'
  file_name: 2023_JourCellScience_Higashi.pdf
  file_size: 18665315
  relation: main_file
file_date_updated: 2023-08-21T07:37:54Z
has_accepted_license: '1'
intvolume: '       136'
isi: 1
issue: '15'
language:
- iso: eng
month: '08'
oa_version: None
project:
- _id: 260F1432-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '742573'
  name: Interaction and feedback between cell mechanics and fate specification in
    vertebrate gastrulation
publication: Journal of Cell Science
publication_identifier:
  eissn:
  - 1477-9137
  issn:
  - 0021-9533
publication_status: published
publisher: The Company of Biologists
quality_controlled: '1'
scopus_import: '1'
status: public
title: ZnUMBA - a live imaging method to detect local barrier breaches
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 136
year: '2023'
...
---
_id: '9999'
abstract:
- lang: eng
  text: 'The developmental strategies used by progenitor cells to endure a safe journey
    from their induction place towards the site of terminal differentiation are still
    poorly understood. Here we uncovered a progenitor cell allocation mechanism that
    stems from an incomplete process of epithelial delamination that allows progenitors
    to coordinate their movement with adjacent extra-embryonic tissues. Progenitors
    of the zebrafish laterality organ originate from the surface epithelial enveloping
    layer by an apical constriction process of cell delamination. During this process,
    progenitors retain long-term apical contacts that enable the epithelial layer
    to pull a subset of progenitors along their way towards the vegetal pole. The
    remaining delaminated progenitors follow apically-attached progenitors’ movement
    by a co-attraction mechanism, avoiding sequestration by the adjacent endoderm,
    ensuring their fate and collective allocation at the differentiation site. Thus,
    we reveal that incomplete delamination serves as a cellular platform for coordinated
    tissue movements during development. Impact Statement: Incomplete delamination
    serves as a cellular platform for coordinated tissue movements during development,
    guiding newly formed progenitor cell groups to the differentiation site.'
article_number: e66483
article_processing_charge: Yes
article_type: original
author:
- first_name: Eduardo
  full_name: Pulgar, Eduardo
  last_name: Pulgar
- first_name: Cornelia
  full_name: Schwayer, Cornelia
  id: 3436488C-F248-11E8-B48F-1D18A9856A87
  last_name: Schwayer
  orcid: 0000-0001-5130-2226
- first_name: Néstor
  full_name: Guerrero, Néstor
  last_name: Guerrero
- first_name: Loreto
  full_name: López, Loreto
  last_name: López
- first_name: Susana
  full_name: Márquez, Susana
  last_name: Márquez
- first_name: Steffen
  full_name: Härtel, Steffen
  last_name: Härtel
- first_name: Rodrigo
  full_name: Soto, Rodrigo
  last_name: Soto
- first_name: Carl Philipp
  full_name: Heisenberg, Carl Philipp
  last_name: Heisenberg
- first_name: Miguel L.
  full_name: Concha, Miguel L.
  last_name: Concha
citation:
  ama: Pulgar E, Schwayer C, Guerrero N, et al. Apical contacts stemming from incomplete
    delamination guide progenitor cell allocation through a dragging mechanism. <i>eLife</i>.
    2021;10. doi:<a href="https://doi.org/10.7554/eLife.66483">10.7554/eLife.66483</a>
  apa: Pulgar, E., Schwayer, C., Guerrero, N., López, L., Márquez, S., Härtel, S.,
    … Concha, M. L. (2021). Apical contacts stemming from incomplete delamination
    guide progenitor cell allocation through a dragging mechanism. <i>ELife</i>. eLife
    Sciences Publications. <a href="https://doi.org/10.7554/eLife.66483">https://doi.org/10.7554/eLife.66483</a>
  chicago: Pulgar, Eduardo, Cornelia Schwayer, Néstor Guerrero, Loreto López, Susana
    Márquez, Steffen Härtel, Rodrigo Soto, Carl Philipp Heisenberg, and Miguel L.
    Concha. “Apical Contacts Stemming from Incomplete Delamination Guide Progenitor
    Cell Allocation through a Dragging Mechanism.” <i>ELife</i>. eLife Sciences Publications,
    2021. <a href="https://doi.org/10.7554/eLife.66483">https://doi.org/10.7554/eLife.66483</a>.
  ieee: E. Pulgar <i>et al.</i>, “Apical contacts stemming from incomplete delamination
    guide progenitor cell allocation through a dragging mechanism,” <i>eLife</i>,
    vol. 10. eLife Sciences Publications, 2021.
  ista: Pulgar E, Schwayer C, Guerrero N, López L, Márquez S, Härtel S, Soto R, Heisenberg
    CP, Concha ML. 2021. Apical contacts stemming from incomplete delamination guide
    progenitor cell allocation through a dragging mechanism. eLife. 10, e66483.
  mla: Pulgar, Eduardo, et al. “Apical Contacts Stemming from Incomplete Delamination
    Guide Progenitor Cell Allocation through a Dragging Mechanism.” <i>ELife</i>,
    vol. 10, e66483, eLife Sciences Publications, 2021, doi:<a href="https://doi.org/10.7554/eLife.66483">10.7554/eLife.66483</a>.
  short: E. Pulgar, C. Schwayer, N. Guerrero, L. López, S. Márquez, S. Härtel, R.
    Soto, C.P. Heisenberg, M.L. Concha, ELife 10 (2021).
date_created: 2021-09-12T22:01:23Z
date_published: 2021-08-27T00:00:00Z
date_updated: 2023-08-14T06:53:33Z
day: '27'
ddc:
- '570'
department:
- _id: CaHe
doi: 10.7554/eLife.66483
ec_funded: 1
external_id:
  isi:
  - '000700428500001'
  pmid:
  - '34448451'
file:
- access_level: open_access
  checksum: a3f82b0499cc822ac1eab48a01f3f57e
  content_type: application/pdf
  creator: dernst
  date_created: 2022-05-13T08:03:37Z
  date_updated: 2022-05-13T08:03:37Z
  file_id: '11371'
  file_name: 2021_eLife_Pulgar.pdf
  file_size: 9010446
  relation: main_file
  success: 1
file_date_updated: 2022-05-13T08:03:37Z
has_accepted_license: '1'
intvolume: '        10'
isi: 1
keyword:
- cell delamination
- apical constriction
- dragging
- mechanical forces
- collective 18 locomotion
- dorsal forerunner cells
- zebrafish
language:
- iso: eng
month: '08'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 260F1432-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '742573'
  name: Interaction and feedback between cell mechanics and fate specification in
    vertebrate gastrulation
publication: eLife
publication_identifier:
  eissn:
  - 2050-084X
publication_status: published
publisher: eLife Sciences Publications
quality_controlled: '1'
scopus_import: '1'
status: public
title: Apical contacts stemming from incomplete delamination guide progenitor cell
  allocation through a dragging mechanism
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: '7001'
acknowledged_ssus:
- _id: PreCl
- _id: Bio
article_processing_charge: No
article_type: original
author:
- first_name: Cornelia
  full_name: Schwayer, Cornelia
  id: 3436488C-F248-11E8-B48F-1D18A9856A87
  last_name: Schwayer
  orcid: 0000-0001-5130-2226
- first_name: Shayan
  full_name: Shamipour, Shayan
  id: 40B34FE2-F248-11E8-B48F-1D18A9856A87
  last_name: Shamipour
- first_name: Kornelija
  full_name: Pranjic-Ferscha, Kornelija
  id: 4362B3C2-F248-11E8-B48F-1D18A9856A87
  last_name: Pranjic-Ferscha
- first_name: Alexandra
  full_name: Schauer, Alexandra
  id: 30A536BA-F248-11E8-B48F-1D18A9856A87
  last_name: Schauer
  orcid: 0000-0001-7659-9142
- first_name: M
  full_name: Balda, M
  last_name: Balda
- first_name: M
  full_name: Tada, M
  last_name: Tada
- first_name: K
  full_name: Matter, K
  last_name: Matter
- 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
citation:
  ama: Schwayer C, Shamipour S, Pranjic-Ferscha K, et al. Mechanosensation of tight
    junctions depends on ZO-1 phase separation and flow. <i>Cell</i>. 2019;179(4):937-952.e18.
    doi:<a href="https://doi.org/10.1016/j.cell.2019.10.006">10.1016/j.cell.2019.10.006</a>
  apa: Schwayer, C., Shamipour, S., Pranjic-Ferscha, K., Schauer, A., Balda, M., Tada,
    M., … Heisenberg, C.-P. J. (2019). Mechanosensation of tight junctions depends
    on ZO-1 phase separation and flow. <i>Cell</i>. Cell Press. <a href="https://doi.org/10.1016/j.cell.2019.10.006">https://doi.org/10.1016/j.cell.2019.10.006</a>
  chicago: Schwayer, Cornelia, Shayan Shamipour, Kornelija Pranjic-Ferscha, Alexandra
    Schauer, M Balda, M Tada, K Matter, and Carl-Philipp J Heisenberg. “Mechanosensation
    of Tight Junctions Depends on ZO-1 Phase Separation and Flow.” <i>Cell</i>. Cell
    Press, 2019. <a href="https://doi.org/10.1016/j.cell.2019.10.006">https://doi.org/10.1016/j.cell.2019.10.006</a>.
  ieee: C. Schwayer <i>et al.</i>, “Mechanosensation of tight junctions depends on
    ZO-1 phase separation and flow,” <i>Cell</i>, vol. 179, no. 4. Cell Press, p.
    937–952.e18, 2019.
  ista: Schwayer C, Shamipour S, Pranjic-Ferscha K, Schauer A, Balda M, Tada M, Matter
    K, Heisenberg C-PJ. 2019. Mechanosensation of tight junctions depends on ZO-1
    phase separation and flow. Cell. 179(4), 937–952.e18.
  mla: Schwayer, Cornelia, et al. “Mechanosensation of Tight Junctions Depends on
    ZO-1 Phase Separation and Flow.” <i>Cell</i>, vol. 179, no. 4, Cell Press, 2019,
    p. 937–952.e18, doi:<a href="https://doi.org/10.1016/j.cell.2019.10.006">10.1016/j.cell.2019.10.006</a>.
  short: C. Schwayer, S. Shamipour, K. Pranjic-Ferscha, A. Schauer, M. Balda, M. Tada,
    K. Matter, C.-P.J. Heisenberg, Cell 179 (2019) 937–952.e18.
date_created: 2019-11-12T12:51:06Z
date_published: 2019-10-31T00:00:00Z
date_updated: 2024-03-25T23:30:21Z
day: '31'
ddc:
- '570'
department:
- _id: CaHe
- _id: BjHo
doi: 10.1016/j.cell.2019.10.006
ec_funded: 1
external_id:
  isi:
  - '000493898000012'
  pmid:
  - '31675500'
file:
- access_level: open_access
  checksum: 33dac4bb77ee630e2666e936b4d57980
  content_type: application/pdf
  creator: dernst
  date_created: 2020-10-21T07:09:45Z
  date_updated: 2020-10-21T07:09:45Z
  file_id: '8684'
  file_name: 2019_Cell_Schwayer_accepted.pdf
  file_size: 8805878
  relation: main_file
  success: 1
file_date_updated: 2020-10-21T07:09:45Z
has_accepted_license: '1'
intvolume: '       179'
isi: 1
issue: '4'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Submitted Version
page: 937-952.e18
pmid: 1
project:
- _id: 260F1432-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '742573'
  name: Interaction and feedback between cell mechanics and fate specification in
    vertebrate gastrulation
publication: Cell
publication_identifier:
  eissn:
  - 1097-4172
  issn:
  - 0092-8674
publication_status: published
publisher: Cell Press
quality_controlled: '1'
related_material:
  link:
  - description: News auf IST Website
    relation: press_release
    url: https://ist.ac.at/en/news/biochemistry-meets-mechanics-the-sensitive-nature-of-cell-cell-contact-formation-in-embryo-development/
  record:
  - id: '7186'
    relation: dissertation_contains
    status: public
  - id: '8350'
    relation: dissertation_contains
    status: public
scopus_import: '1'
status: public
title: Mechanosensation of tight junctions depends on ZO-1 phase separation and flow
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 179
year: '2019'
...
---
_id: '7186'
abstract:
- lang: eng
  text: "Tissue morphogenesis in developmental or physiological processes is regulated
    by molecular\r\nand mechanical signals. While the molecular signaling cascades
    are increasingly well\r\ndescribed, the mechanical signals affecting tissue shape
    changes have only recently been\r\nstudied in greater detail. To gain more insight
    into the mechanochemical and biophysical\r\nbasis of an epithelial spreading process
    (epiboly) in early zebrafish development, we studied\r\ncell-cell junction formation
    and actomyosin network dynamics at the boundary between\r\nsurface layer epithelial
    cells (EVL) and the yolk syncytial layer (YSL). During zebrafish epiboly,\r\nthe
    cell mass sitting on top of the yolk cell spreads to engulf the yolk cell by the
    end of\r\ngastrulation. It has been previously shown that an actomyosin ring residing
    within the YSL\r\npulls on the EVL tissue through a cable-constriction and a flow-friction
    motor, thereby\r\ndragging the tissue vegetal wards. Pulling forces are likely
    transmitted from the YSL\r\nactomyosin ring to EVL cells; however, the nature
    and formation of the junctional structure\r\nmediating this process has not been
    well described so far. Therefore, our main aim was to\r\ndetermine the nature,
    dynamics and potential function of the EVL-YSL junction during this\r\nepithelial
    tissue spreading. Specifically, we show that the EVL-YSL junction is a\r\nmechanosensitive
    structure, predominantly made of tight junction (TJ) proteins. The process\r\nof
    TJ mechanosensation depends on the retrograde flow of non-junctional, phase-separated\r\nZonula
    Occludens-1 (ZO-1) protein clusters towards the EVL-YSL boundary. Interestingly,
    we\r\ncould demonstrate that ZO-1 is present in a non-junctional pool on the surface
    of the yolk\r\ncell, and ZO-1 undergoes a phase separation process that likely
    renders the protein\r\nresponsive to flows. These flows are directed towards the
    junction and mediate proper\r\ntension-dependent recruitment of ZO-1. Upon reaching
    the EVL-YSL junction ZO-1 gets\r\nincorporated into the junctional pool mediated
    through its direct actin-binding domain.\r\nWhen the non-junctional pool and/or
    ZO-1 direct actin binding is absent, TJs fail in their\r\nproper mechanosensitive
    responses resulting in slower tissue spreading. We could further\r\ndemonstrate
    that depletion of ZO proteins within the YSL results in diminished actomyosin\r\nring
    formation. This suggests that a mechanochemical feedback loop is at work during\r\nzebrafish
    epiboly: ZO proteins help in proper actomyosin ring formation and actomyosin\r\ncontractility
    and flows positively influence ZO-1 junctional recruitment. Finally, such a\r\nmesoscale
    polarization process mediated through the flow of phase-separated protein\r\nclusters
    might have implications for other processes such as immunological synapse\r\nformation,
    C. elegans zygote polarization and wound healing."
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
- _id: EM-Fac
- _id: SSU
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Cornelia
  full_name: Schwayer, Cornelia
  id: 3436488C-F248-11E8-B48F-1D18A9856A87
  last_name: Schwayer
  orcid: 0000-0001-5130-2226
citation:
  ama: Schwayer C. Mechanosensation of tight junctions depends on ZO-1 phase separation
    and flow. 2019. doi:<a href="https://doi.org/10.15479/AT:ISTA:7186">10.15479/AT:ISTA:7186</a>
  apa: Schwayer, C. (2019). <i>Mechanosensation of tight junctions depends on ZO-1
    phase separation and flow</i>. Institute of Science and Technology Austria. <a
    href="https://doi.org/10.15479/AT:ISTA:7186">https://doi.org/10.15479/AT:ISTA:7186</a>
  chicago: Schwayer, Cornelia. “Mechanosensation of Tight Junctions Depends on ZO-1
    Phase Separation and Flow.” Institute of Science and Technology Austria, 2019.
    <a href="https://doi.org/10.15479/AT:ISTA:7186">https://doi.org/10.15479/AT:ISTA:7186</a>.
  ieee: C. Schwayer, “Mechanosensation of tight junctions depends on ZO-1 phase separation
    and flow,” Institute of Science and Technology Austria, 2019.
  ista: Schwayer C. 2019. Mechanosensation of tight junctions depends on ZO-1 phase
    separation and flow. Institute of Science and Technology Austria.
  mla: Schwayer, Cornelia. <i>Mechanosensation of Tight Junctions Depends on ZO-1
    Phase Separation and Flow</i>. Institute of Science and Technology Austria, 2019,
    doi:<a href="https://doi.org/10.15479/AT:ISTA:7186">10.15479/AT:ISTA:7186</a>.
  short: C. Schwayer, Mechanosensation of Tight Junctions Depends on ZO-1 Phase Separation
    and Flow, Institute of Science and Technology Austria, 2019.
date_created: 2019-12-16T14:26:14Z
date_published: 2019-12-16T00:00:00Z
date_updated: 2023-09-07T12:56:42Z
day: '16'
ddc:
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degree_awarded: PhD
department:
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doi: 10.15479/AT:ISTA:7186
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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
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type: dissertation
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---
_id: '1096'
author:
- first_name: Cornelia
  full_name: Schwayer, Cornelia
  id: 3436488C-F248-11E8-B48F-1D18A9856A87
  last_name: Schwayer
  orcid: 0000-0001-5130-2226
- first_name: Mateusz K
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  id: 2F74BCDE-F248-11E8-B48F-1D18A9856A87
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- first_name: Jana
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  id: 39427864-F248-11E8-B48F-1D18A9856A87
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  orcid: 0000-0002-0912-4566
citation:
  ama: Schwayer C, Sikora MK, Slovakova J, Kardos R, Heisenberg C-PJ. Actin rings
    of power. <i>Developmental Cell</i>. 2016;37(6):493-506. doi:<a href="https://doi.org/10.1016/j.devcel.2016.05.024">10.1016/j.devcel.2016.05.024</a>
  apa: Schwayer, C., Sikora, M. K., Slovakova, J., Kardos, R., &#38; Heisenberg, C.-P.
    J. (2016). Actin rings of power. <i>Developmental Cell</i>. Cell Press. <a href="https://doi.org/10.1016/j.devcel.2016.05.024">https://doi.org/10.1016/j.devcel.2016.05.024</a>
  chicago: Schwayer, Cornelia, Mateusz K Sikora, Jana Slovakova, Roland Kardos, and
    Carl-Philipp J Heisenberg. “Actin Rings of Power.” <i>Developmental Cell</i>.
    Cell Press, 2016. <a href="https://doi.org/10.1016/j.devcel.2016.05.024">https://doi.org/10.1016/j.devcel.2016.05.024</a>.
  ieee: C. Schwayer, M. K. Sikora, J. Slovakova, R. Kardos, and C.-P. J. Heisenberg,
    “Actin rings of power,” <i>Developmental Cell</i>, vol. 37, no. 6. Cell Press,
    pp. 493–506, 2016.
  ista: Schwayer C, Sikora MK, Slovakova J, Kardos R, Heisenberg C-PJ. 2016. Actin
    rings of power. Developmental Cell. 37(6), 493–506.
  mla: Schwayer, Cornelia, et al. “Actin Rings of Power.” <i>Developmental Cell</i>,
    vol. 37, no. 6, Cell Press, 2016, pp. 493–506, doi:<a href="https://doi.org/10.1016/j.devcel.2016.05.024">10.1016/j.devcel.2016.05.024</a>.
  short: C. Schwayer, M.K. Sikora, J. Slovakova, R. Kardos, C.-P.J. Heisenberg, Developmental
    Cell 37 (2016) 493–506.
date_created: 2018-12-11T11:50:07Z
date_published: 2016-06-20T00:00:00Z
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doi: 10.1016/j.devcel.2016.05.024
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