Conditional deletion of the colony stimulating factor-1 receptor (c-fms proto-oncogene) in mice

Jia Li, Ken Chen, Liyin Zhu, Jeffrey W. Pollard

Research output: Contribution to journalArticlepeer-review

96 Scopus citations


Colony stimulating factor-1 (CSF-1) is the primary regulator of the mononuclear phagocytic lineage acting through its transmembrane tyrosine kinase receptor, CSF-1R, that is the product of the c-fms protooncogene. Null mutations in either the ligand or the receptor genes result in a severe osteopetrosis as well as a number of other phenotypes, including reproductive defects and perturbations in organ development. The CSF-1R is also expressed in oocytes, myoblast progenitors, decidual, and trophoblastic cells. To distinguish cell type specific phenotypes, we have created a conditional allele of the Csf1r by placing LoxP sites around Exon 5 of the Csf1r gene in mice. Excision of this floxed sequence results in a null allele that in the homozygous state gives a phenotype indistinguishable of the complete Csf1r null mutant mouse. This conditional allele will prove extremely valuable to study the spatial and temporal roles of CSF-1R.

Original languageEnglish (US)
Pages (from-to)328-335
Number of pages8
JournalGenesis (United States)
Issue number7
StatePublished - Jul 2006


  • CSF-1
  • M-CSF
  • Macrophages
  • Reproduction

ASJC Scopus subject areas

  • Genetics
  • Endocrinology
  • Cell Biology


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