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Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata will form...

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Using Confocal Analysis of Xenopus laevis to Investigate Modulators of Wnt and Shh Morphogen Gradients

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A framework for connecting gene expression to morphogenetic movements in embryos.

G Wayne Brodland¹

¹Department of Civil and Environmental Engineering, University of Waterloo, Waterloo, ON N2L 3G1 Canada. brodland@uwaterloo.ca

IEEE Transactions on Bio-Medical Engineering

|June 22, 2011

Summary

This study introduces a multiscale biochemical-mechanical framework to integrate knowledge of genetic networks and cell mechanics in early embryo development. The framework provides insights into crucial tissue movements like gastrulation and convergent extension.

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Area of Science:

Developmental Biology
Biophysics
Computational Biology

Background:

Significant advances in understanding genetic networks, cell mechanics, and whole-embryo mechanics exist.
Integrating these disparate knowledge domains into a cohesive understanding remains a challenge.

Purpose of the Study:

To propose a multiscale biochemical-mechanical framework for integrating knowledge of developmental processes.
To identify components with available quantitative descriptions within this framework.
To apply the framework to understand key embryonic tissue movements.

Main Methods:

Development of a multiscale biochemical-mechanical framework.
Identification of framework components with existing quantitative data.
Application of the framework to analyze convergent extension and gastrulation.

Main Results:

The proposed framework facilitates the integration of genetic and mechanical data.
Quantitative insights were gained into the mechanisms of convergent extension.
The framework aids in understanding gastrulation processes in early amphibian embryos.

Conclusions:

The multiscale framework offers a pathway to connect genetic and mechanical aspects of development.
This integrated approach enhances understanding of fundamental embryonic morphogenetic events.
Further development and application of the framework hold promise for developmental biology research.