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Proc Natl Acad Sci U S A. 2000 Jun 6;97(12):6844-9.

Mouse numb is an essential gene involved in cortical neurogenesis.

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  • 1Howard Hughes Medical Institute and Departments of Physiology and Biochemistry, Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, CA 94143, USA.

Abstract

During neurogenesis of the mammalian neocortex, neural progenitor cells divide to generate daughter cells that either become neurons or remain as progenitor cells. The mouse numb (m-numb) gene encodes a membrane-associated protein that is asymmetrically localized to the apical cell membrane of dividing cortical progenitor cells and may be segregated to only the apical daughter cell that has been suggested to remain as a progenitor cell. To examine m-numb function during neural development, we generated a loss-of-function mutant allele of m-numb. Mice homozygous for this mutation exhibit severe defects in cranial neural tube closure and precocious neuron production in the forebrain and die around embryonic day 11.5 (E11. 5). These findings suggest that m-numb is an essential gene that plays a role in promoting progenitor cell fate during cortical neurogenesis.

PMID:
10841580
[PubMed - indexed for MEDLINE]
PMCID:
PMC18761
Free PMC Article

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