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Developmental gene regulatory network evolution: insights from comparative studies in echinoderms.

Veronica F Hinman1, Alys M Cheatle Jarvela

  • 1Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania.

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|February 20, 2014
PubMed
Summary
This summary is machine-generated.

Evolutionary developmental biology investigates how cell type specification evolves. Echinoderms reveal conserved gene regulatory network (GRN) motifs, like positive feedback, and gene co-option drive evolutionary novelty in development.

Keywords:
cell fate specification processearly development processechinodermevolution processinvertebrate

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Area of Science:

  • Evolutionary Developmental Biology
  • Genomics
  • Systems Biology

Background:

  • Understanding evolutionary changes in cell type specification is a key challenge.
  • Gene regulatory networks (GRNs) are central to cell specification processes.
  • Echinoderms offer a powerful model for studying GRN evolution.

Purpose of the Study:

  • To review comparative GRN analyses in echinoderms.
  • To explore mechanisms of evolutionary novelty in development.
  • To discuss GRN diversity in ciliary band patterns.

Main Methods:

  • Comparative analysis of gene regulatory networks (GRNs) in echinoderms.
  • Investigating conserved GRN subcircuits (motifs).
  • Examining gene co-option and cis-regulatory module evolution.

Main Results:

  • Conserved GRN motifs, particularly those with positive feedback, may constrain development.
  • Conservation is potentially linked to transcription factor binding site arrangements.
  • Gene co-option and subcircuit recruitment generate developmental novelty.

Conclusions:

  • Echinoderms are a powerful system for studying GRN evolution due to expanding genomic resources.
  • Conserved GRN motifs and gene co-option are key drivers of evolutionary changes in development.
  • GRN diversity underlies the varied patterns of ciliary bands and neurons in echinoderms.