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The morphogen signaling network in forebrain development and holoprosencephaly.
1Department of Pathology and Laboratory Medicine, UC Irvine School of Medicine, University of California-Irvine, Irvine, CA 92697, USA. emonuki@uci.edu
Journal of Neuropathology and Experimental Neurology
|July 11, 2007
Summary
Forebrain development relies on morphogen signaling. Defects in these signals, including Nodal, Sonic hedgehog, FGFs, and BMPs, can cause holoprosencephaly (HPE), a common brain malformation.
Area of Science:
- Developmental Biology
- Neuroscience
- Genetics
Background:
- Forebrain development is regulated by secreted signaling molecules called morphogens.
- Defects in morphogen signaling are linked to failed midline induction and holoprosencephaly (HPE), a prevalent human forebrain malformation.
Purpose of the Study:
- To review the roles of key morphogens in HPE and forebrain midline development.
- To highlight recent evidence on cross-regulatory interactions between morphogens in forebrain development.
Main Methods:
- Literature review of genetic studies and research on morphogen signaling.
- Analysis of signaling network models explaining HPE phenotypes.
Main Results:
- Four major morphogen families (Nodal, Sonic hedgehog, FGFs, BMPs) are implicated in HPE.
- Cross-regulatory interactions between these morphogens form a complex signaling network.
Conclusions:
- This network model provides a framework for understanding HPE etiology and phenotypes.
- Understanding these interactions is crucial for studying forebrain development and malformations.
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