Cell size and polarization determine cytokinesis furrow ingression dynamics in mouse embryos.

ABSTRACT: Cytokinesis is the final step of cell division during which a contractile ring forms a furrow that partitions the cytoplasm in two. How furrow ingression is spatiotemporally regulated and how it is adapted to complex cellular environments and developmental transitions remain poorly understood. Here, we examine furrow ingression dynamics in the context of the early mouse embryo and find that cell size is a powerful determinant of furrow ingression speed during reductive cell divisions. In addition, the emergence of cell polarity and the assembly of the apical domain in outer cells locally inhibits the recruitment of cytokinesis components and thereby negatively regulates furrow ingression specifically on one side of the furrow. We show that this biasing of cytokinesis is not dependent upon

SUBMITTER: Paim LMG 

PROVIDER: S-EPMC8944651 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature