Emergence of active nematic behavior in monolayers of isotropic cells
There is now growing evidence of the emergence and biological functionality of liquid crystal features, including nematic order and topological defects, in cellular tissues. However, how such features that intrinsically rely on particle elongation emerge in monolayers of cells with isotropic shapes...
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| Format: | Journal article |
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American Physical Society
2019
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| _version_ | 1826297263216918528 |
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| author | Mueller, R Yeomans, JM Doostmohammadi, A |
| author_facet | Mueller, R Yeomans, JM Doostmohammadi, A |
| author_sort | Mueller, R |
| collection | OXFORD |
| description | There is now growing evidence of the emergence and biological functionality of liquid crystal features, including nematic order and topological defects, in cellular tissues. However, how such features that intrinsically rely on particle elongation emerge in monolayers of cells with isotropic shapes is an outstanding question. In this Letter, we present a minimal model of cellular monolayers based on cell deformation and force transmission at the cell-cell interface that explains the formation of topological defects and captures the flow-field and stress patterns around them. By including mechanical properties at the individual cell level, we further show that the instability that drives the formation of topological defects, and leads to active turbulence, emerges from a feedback between shape deformation and active driving. The model allows us to suggest new explanations for experimental observations in tissue mechanics, and to propose designs for future experiments. |
| first_indexed | 2024-03-07T04:28:54Z |
| format | Journal article |
| id | oxford-uuid:cda400ca-2da1-4f52-9afb-f44535f4ed40 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T04:28:54Z |
| publishDate | 2019 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:cda400ca-2da1-4f52-9afb-f44535f4ed402022-03-27T07:30:02ZEmergence of active nematic behavior in monolayers of isotropic cellsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:cda400ca-2da1-4f52-9afb-f44535f4ed40Symplectic Elements at OxfordAmerican Physical Society2019Mueller, RYeomans, JMDoostmohammadi, AThere is now growing evidence of the emergence and biological functionality of liquid crystal features, including nematic order and topological defects, in cellular tissues. However, how such features that intrinsically rely on particle elongation emerge in monolayers of cells with isotropic shapes is an outstanding question. In this Letter, we present a minimal model of cellular monolayers based on cell deformation and force transmission at the cell-cell interface that explains the formation of topological defects and captures the flow-field and stress patterns around them. By including mechanical properties at the individual cell level, we further show that the instability that drives the formation of topological defects, and leads to active turbulence, emerges from a feedback between shape deformation and active driving. The model allows us to suggest new explanations for experimental observations in tissue mechanics, and to propose designs for future experiments. |
| spellingShingle | Mueller, R Yeomans, JM Doostmohammadi, A Emergence of active nematic behavior in monolayers of isotropic cells |
| title | Emergence of active nematic behavior in monolayers of isotropic cells |
| title_full | Emergence of active nematic behavior in monolayers of isotropic cells |
| title_fullStr | Emergence of active nematic behavior in monolayers of isotropic cells |
| title_full_unstemmed | Emergence of active nematic behavior in monolayers of isotropic cells |
| title_short | Emergence of active nematic behavior in monolayers of isotropic cells |
| title_sort | emergence of active nematic behavior in monolayers of isotropic cells |
| work_keys_str_mv | AT muellerr emergenceofactivenematicbehaviorinmonolayersofisotropiccells AT yeomansjm emergenceofactivenematicbehaviorinmonolayersofisotropiccells AT doostmohammadia emergenceofactivenematicbehaviorinmonolayersofisotropiccells |