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Related Concept Videos

Gastrulation01:56

Gastrulation

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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Related Experiment Video

Updated: Jun 29, 2026

Temporal Ordering of Dynamic Expression Data from Detailed Spatial Expression Maps
11:52

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Published on: February 9, 2017

Converting genetic network oscillations into somite spatial patterns.

K I Mazzitello1, C M Arizmendi, H G E Hentschel

  • 1CONICET-Facultad de Ingeniería, Universidad Nacional de Mar del Plata, Argentina.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|October 15, 2008
PubMed
Summary
This summary is machine-generated.

The study models how gene expression oscillations and a determination front interact to form segmented tissues during vertebrate embryonic development. This model explains somitogenesis and predicts experimental outcomes.

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Area of Science:

  • Developmental biology
  • Systems biology
  • Genetics

Background:

  • Somitogenesis, the segmentation of vertebrate embryos, relies on oscillatory gene expression.
  • The "delay model" proposes negative feedback at transcriptional-translational levels for these oscillations.
  • An Fgf8 gradient acts as a determination front in zebrafish, converting temporal oscillations to spatial somite periodicity.

Purpose of the Study:

  • To extend the delay model by incorporating the interaction between the oscillation clock and the determination front.
  • To compare the extended model's predictions with known zebrafish somitogenesis properties.
  • To investigate the model's ability to replicate anomalies and generate testable predictions.

Main Methods:

  • Computational modeling of gene expression oscillations.
  • Integration of a determination front model (Fgf8 gradient) with the delay model.
  • Comparison of model outputs with experimental data on zebrafish somitogenesis.

Main Results:

  • The extended model successfully integrates intracellular oscillations with the determination front.
  • The model replicates key features of zebrafish somite formation.
  • The model accurately mimics anomalies observed when the determination front's progression is altered.

Conclusions:

  • The interaction between the oscillation clock and the determination front is crucial for somitogenesis.
  • The extended delay model provides a robust framework for understanding somite segmentation.
  • The study proposes a novel experimental prediction to validate the model.