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Plos Computational Biology : Modeling and Inferring Cleavage Patterns in Proliferating Epithelia, Volume 5

By Axelrod, Jeffrey

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Book Id: WPLBN0003927405
Format Type: PDF eBook :
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Reproduction Date: 2015

Title: Plos Computational Biology : Modeling and Inferring Cleavage Patterns in Proliferating Epithelia, Volume 5  
Author: Axelrod, Jeffrey
Volume: Volume 5
Language: English
Subject: Journals, Science, Computational Biology
Collections: Periodicals: Journal and Magazine Collection (Contemporary), PLoS Computational Biology
Historic
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Publisher: Plos

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Axelrod, J. (n.d.). Plos Computational Biology : Modeling and Inferring Cleavage Patterns in Proliferating Epithelia, Volume 5. Retrieved from http://www.nationalpubliclibrary.info/


Description
Description : The regulation of cleavage plane orientation is one of the key mechanisms driving epithelial morphogenesis. Still, many aspects of the relationship between local cleavage patterns and tissue-level properties remain poorly understood. Here we develop a topological model that simulates the dynamics of a 2D proliferating epithelium from generation to generation, enabling the exploration of a wide variety of biologically plausible cleavage patterns. We investigate a spectrum of models that incorporate the spatial impact of neighboring cells and the temporal influence of parent cells on the choice of cleavage plane. Our findings show that cleavage patterns generate ‘‘signature’’ equilibrium distributions of polygonal cell shapes. These signatures enable the inference of local cleavage parameters such as neighbor impact, maternal influence, and division symmetry from global observations of the distribution of cell shape. Applying these insights to the proliferating epithelia of five diverse organisms, we find that strong division symmetry and moderate neighbor/maternal influence are required to reproduce the predominance of hexagonal cells and low variability in cell shape seen empirically. Furthermore, we present two distinct cleavage pattern models, one stochastic and one deterministic, that can reproduce the empirical distribution of cell shapes. Although the proliferating epithelia of the five diverse organisms show a highly conserved cell shape distribution, there are multiple plausible cleavage patterns that can generate this distribution, and experimental evidence suggests that indeed plants and fruitflies use distinct division mechanisms.

 

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