Developmental expression of the α receptor for platelet-derived growth factor, which is deleted in the embryonic lethal Patch mutation

Avi Orr-Urtreger, Mark T. Bedford, Myoung Sool Do, Lea Eisenbach, Peter Lonai*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

185 Scopus citations

Abstract

The α receptor of PDGF (Pdgfra) is expressed in primitive endoderm and mesoderm derivatives throughout embryogenesis. In the early primitive streak stage the gene is transcribed in the visceral and parietal endoderm. Later it is expressed in the presomitic mesoderm, yolk sac and amnion. During somitogenesis its transcription localizes to the heart and the somites. Subsequently, it is transcribed in the dermatome, the sclerotome, the developing limb and in various mesenchymal tissues of visceral organs. Its wild-type expression pattern correlates well with the phenotype of homozygous mutant Patch (Ph) embryos, where the Pdgfra gene is deleted. The Ph phenotype is first detectable at the primitive streak stage with convoluted and hypertrophic visceral yolk sac, deformed neural plate and disorganized or missing mesoderm. Most Ph/Ph embryos die before the 11th day of gestation. Those that survive till early organogenesis are very small, have hypertrophic yolk sacs, small and undifferentiated somites, convoluted neural tubes, large heart and pericardium, rudimentary limb buds and branchial arches. Our observations together suggest that the α PDGF receptor may be required for the normal development of visceral endoderm and mesoderm derivatives.

Original languageEnglish
Pages (from-to)289-303
Number of pages15
JournalDevelopment (Cambridge)
Volume115
Issue number1
StatePublished - May 1992
Externally publishedYes

Keywords

  • Embryogenesis
  • Embryonic lethality
  • In situ hybridization
  • PDGF receptor
  • Ph mutation

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