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Nature. 1990 Oct 18;347(6294):667-9.

Embryonic expression of a haematopoietic growth factor encoded by the Sl locus and the ligand for c-kit.

Author information

1
Department of Cell Biology, Vanderbilt University Medical School, Nashville, Tennessee 37232-2172.

Abstract

Mice carrying mutations at the W (Dominant white spotting) and Sl (Steel) loci develop abnormalities in three independent systems: neural crest-derived melanocytes, primordial germ cells and haematopoietic stem cells. Consequently, homozygotes of viable mutant alleles have white coats and are sterile and severely anaemic. Tissue recombination studies predict that the W gene is expressed cell autonomously, whereas the product of the Sl locus affects the microenvironment in which the stem cells migrate, proliferate and differentiate. The W locus encodes the protoncogene c-kit, a member of the tyrosine kinase receptor family. The haematopoietic growth factor SCF (stem cell factor) has been identified as the product of the Sl locus and a ligand for c-kit. Here, we report that SCF is expressed during embryogenesis in cells associated with both the migratory pathways and homing sites of melanoblasts, germ cells and haematopoietic stem cells. Both SCF and c-kit are also expressed in a variety of other tissues, including the brain and spinal cord, suggesting that the receptor-ligand system has additional roles in embryogenesis.

PMID:
1699134
DOI:
10.1038/347667a0
[Indexed for MEDLINE]

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