Krajnc M, Stern T, Zankoc C. Active Instability and Nonlinear Dynamics of Cell-Cell Junctions.
PHYSICAL REVIEW LETTERS 2021;
127:198103. [PMID:
34797151 DOI:
10.1103/physrevlett.127.198103]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 10/19/2021] [Indexed: 06/13/2023]
Abstract
Active cell-junction remodeling is important for tissue morphogenesis, yet its underlying physics is not understood. We study a mechanical model that describes junctions as dynamic active force dipoles. Their instability can trigger cell intercalations by a critical collapse. Nonlinearities in tissue's elastic response can stabilize the collapse either by a limit cycle or condensation of junction lengths at cusps of the energy landscape. Furthermore, active junction networks undergo collective instability to drive active in-plane ordering or develop a limit cycle of collective oscillations, which extends over regions of the energy landscape corresponding to distinct network topologies.
Collapse