title: Enhanced endotoxin sensitivity in fps/fes-null mice with minimal defects in hematopoietic homeostasis.
abstract: The fps/fes proto-oncogene encodes a cytoplasmic protein tyrosine kinase implicated in growth factor and cytokine receptor signaling and thought to be essential for the survival and terminal differentiation of myeloid progenitors. Fps/Fes-null mice were healthy and fertile, displayed slightly reduced numbers of bone marrow myeloid progenitors and circulating mature myeloid cells, and were more sensitive to lipopolysaccharide (LPS). These phenotypes were rescued using a fps/fes transgene. This confirmed that Fps/Fes is involved in, but not required for, myelopoiesis and that it plays a role in regulating the innate immune response. Bone marrow-derived Fps/Fes-null macrophages showed no defects in granulocyte-macrophage colony-stimulating factor-, interleukin 6 (IL-6)-, or IL-3-induced activation of signal transducer and activator of transcription 3 (Stat3) and Stat5A or LPS-induced degradation of I kappa B or activation of p38, Jnk, Erk, or Akt.
authors.affiliation: Division of Cancer Biology and Genetics, Queen's University Cancer Research Institute, Queen's University, Kingston, Ontario K7L-3N6, Canada.
authors.forename: Ralph A
authors.initials: RA
authors.lastname: Zirngibl
authors.forename: Yotis
authors.initials: Y
authors.lastname: Senis
authors.forename: Peter A
authors.initials: PA
authors.lastname: Greer
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D004268:DNA-Binding Proteins / Q000378:metabolism; D005260:Female; D015681:Fusion Proteins, gag-onc / Q000172:deficiency* / Q000235:genetics*; D018390:Gene Targeting; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000494:pharmacology; D006410:Hematopoiesis / Q000235:genetics*; D006706:Homeostasis; D006801:Humans; D007377:Interleukin-3 / Q000494:pharmacology; D008070:Lipopolysaccharides / Q000633:toxicity*; D008262:Macrophage Activation / Q000187:drug effects / Q000235:genetics; D008297:Male; D051379:Mice; D018345:Mice, Knockout; D008822:Mice, Transgenic; D008894:Milk Proteins; D010641:Phenotype; D011505:Protein-Tyrosine Kinases / Q000172:deficiency* / Q000235:genetics*; D000090063:Proto-Oncogene Mas; D050796:STAT3 Transcription Factor; D050799:STAT5 Transcription Factor; D015398:Signal Transduction; D013601:T-Lymphocytes / Q000276:immunology; D015534:Trans-Activators / Q000378:metabolism; D025521:Tumor Suppressor Proteins
chemical_list: D004268:DNA-Binding Proteins; D015681:Fusion Proteins, gag-onc; D007377:Interleukin-3; D008070:Lipopolysaccharides; C000715470:MAS1 protein, human; D008894:Milk Proteins; D000090063:Proto-Oncogene Mas; D050796:STAT3 Transcription Factor; C494086:STAT3 protein, human; D050799:STAT5 Transcription Factor; C494092:STAT5A protein, human; C494087:Stat3 protein, mouse; C494093:Stat5a protein, mouse; D015534:Trans-Activators; D025521:Tumor Suppressor Proteins; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D011505:Protein-Tyrosine Kinases; C068415:v-fps oncogene protein, Fujinami sarcoma virus