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MCAK-mediated regulation of endothelial cell microtubule dynamics is mechanosensitive to myosin-II contractility
Compliance and dimensionality mechanosensing, the processes by which cells sense the physical attributes of the extracellular matrix (ECM), are known to drive cell branching and shape change largely through a myosin-II–mediated reorganization of the actin and microtubule (MT) cytoskeletons. Subcellu...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The American Society for Cell Biology
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5415018/ https://www.ncbi.nlm.nih.gov/pubmed/28298485 http://dx.doi.org/10.1091/mbc.E16-05-0306 |
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author | D’Angelo, Lauren Myer, Nicole M. Myers, Kenneth A. |
author_facet | D’Angelo, Lauren Myer, Nicole M. Myers, Kenneth A. |
author_sort | D’Angelo, Lauren |
collection | PubMed |
description | Compliance and dimensionality mechanosensing, the processes by which cells sense the physical attributes of the extracellular matrix (ECM), are known to drive cell branching and shape change largely through a myosin-II–mediated reorganization of the actin and microtubule (MT) cytoskeletons. Subcellular regulation of MT dynamics is spatially controlled through a Rac1–Aurora-A kinase pathway that locally inhibits the MT depolymerizing activity of mitotic centromere–associated kinesin (MCAK), thereby promoting leading-edge MT growth and cell polarization. These results suggest that the regulation of MT growth dynamics is intimately linked to physical engagement of the cell with the ECM. Here, we tested the hypothesis that MCAK contributes to compliance and dimensionality mechanosensing-mediated regulation of MT growth dynamics through a myosin-II–dependent signaling pathway. We cultured endothelial cells (ECs) on collagen-coupled stiff or compliant polyacrylamide ECMs to examine the effects of MCAK expression on MT growth dynamics and EC branching morphology. Our results identify that MCAK promotes fast MT growth speeds in ECs cultured on compliant 2D ECMs but promotes slow MT growth speeds in ECs cultured on compliant 3D ECMs, and these effects are myosin-II dependent. Furthermore, we find that 3D ECM engagement uncouples MCAK-mediated regulation of MT growth persistence from myosin-II–mediated regulation of growth persistence specifically within EC branched protrusions. |
format | Online Article Text |
id | pubmed-5415018 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | The American Society for Cell Biology |
record_format | MEDLINE/PubMed |
spelling | pubmed-54150182017-07-16 MCAK-mediated regulation of endothelial cell microtubule dynamics is mechanosensitive to myosin-II contractility D’Angelo, Lauren Myer, Nicole M. Myers, Kenneth A. Mol Biol Cell Articles Compliance and dimensionality mechanosensing, the processes by which cells sense the physical attributes of the extracellular matrix (ECM), are known to drive cell branching and shape change largely through a myosin-II–mediated reorganization of the actin and microtubule (MT) cytoskeletons. Subcellular regulation of MT dynamics is spatially controlled through a Rac1–Aurora-A kinase pathway that locally inhibits the MT depolymerizing activity of mitotic centromere–associated kinesin (MCAK), thereby promoting leading-edge MT growth and cell polarization. These results suggest that the regulation of MT growth dynamics is intimately linked to physical engagement of the cell with the ECM. Here, we tested the hypothesis that MCAK contributes to compliance and dimensionality mechanosensing-mediated regulation of MT growth dynamics through a myosin-II–dependent signaling pathway. We cultured endothelial cells (ECs) on collagen-coupled stiff or compliant polyacrylamide ECMs to examine the effects of MCAK expression on MT growth dynamics and EC branching morphology. Our results identify that MCAK promotes fast MT growth speeds in ECs cultured on compliant 2D ECMs but promotes slow MT growth speeds in ECs cultured on compliant 3D ECMs, and these effects are myosin-II dependent. Furthermore, we find that 3D ECM engagement uncouples MCAK-mediated regulation of MT growth persistence from myosin-II–mediated regulation of growth persistence specifically within EC branched protrusions. The American Society for Cell Biology 2017-05-01 /pmc/articles/PMC5415018/ /pubmed/28298485 http://dx.doi.org/10.1091/mbc.E16-05-0306 Text en © 2017 D’Angelo et al. This article is distributed by The American Society for Cell Biology under license from the author(s). Two months after publication it is available to the public under an Attribution–Noncommercial–Share Alike 3.0 Unported Creative Commons License (http://creativecommons.org/licenses/by-nc-sa/3.0). “ASCB®,” “The American Society for Cell Biology®,” and “Molecular Biology of the Cell®” are registered trademarks of The American Society for Cell Biology. |
spellingShingle | Articles D’Angelo, Lauren Myer, Nicole M. Myers, Kenneth A. MCAK-mediated regulation of endothelial cell microtubule dynamics is mechanosensitive to myosin-II contractility |
title | MCAK-mediated regulation of endothelial cell microtubule dynamics is mechanosensitive to myosin-II contractility |
title_full | MCAK-mediated regulation of endothelial cell microtubule dynamics is mechanosensitive to myosin-II contractility |
title_fullStr | MCAK-mediated regulation of endothelial cell microtubule dynamics is mechanosensitive to myosin-II contractility |
title_full_unstemmed | MCAK-mediated regulation of endothelial cell microtubule dynamics is mechanosensitive to myosin-II contractility |
title_short | MCAK-mediated regulation of endothelial cell microtubule dynamics is mechanosensitive to myosin-II contractility |
title_sort | mcak-mediated regulation of endothelial cell microtubule dynamics is mechanosensitive to myosin-ii contractility |
topic | Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5415018/ https://www.ncbi.nlm.nih.gov/pubmed/28298485 http://dx.doi.org/10.1091/mbc.E16-05-0306 |
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