title: Expression of the human c-fms proto-oncogene in hematopoietic cells and its deletion in the 5q- syndrome.
abstract: The c-fms proto-oncogene was shown to be expressed in human bone marrow and in differentiated blood mononuclear cells, suggesting that its gene product plays a role in hematopoietic maturation. The c-fms mRNA was not detected in HL-60 cells, an established promyelocytic line, whereas c-fms expression appeared 48 hr after induction when most cells had differentiated into macrophages. An acquired deletion of chromosome 5 (5q-) in bone marrow cells is associated with abnormalities in blood cell production. The normal 5 and 5q- chromosomes were segregated by construction of cell hybrids between bone marrow and rodent cells. A selective system was used that requires retention of the structural gene for dihydrofolate reductase, located on human chromosome 5. Analysis of DNA from individual hybrid clones revealed that the 5q- deletion had removed the c-fms gene. We postulate that hemizygosity at the c-fms locus leads to abnormalities in hematopoietic maturation.
mesh_terms: D000741:Anemia, Aplastic / Q000097:blood / Q000235:genetics*; D000818:Animals; D001853:Bone Marrow / Q000378:metabolism; D001854:Bone Marrow Cells; D002460:Cell Line; D002872:Chromosome Deletion; D002905:Chromosomes, Human, 4-5; D006224:Cricetinae; D006410:Hematopoiesis; D006801:Humans; D006822:Hybrid Cells; D008264:Macrophages / Q000378:metabolism; D009000:Monocytes / Q000378:metabolism; D009857:Oncogenes; D000090063:Proto-Oncogene Mas; D012333:RNA, Messenger / Q000235:genetics; D013577:Syndrome; D014158:Transcription, Genetic
chemical_list: C000715470:MAS1 protein, human; D000090063:Proto-Oncogene Mas; D012333:RNA, Messenger