title: E2F4 modulates differentiation and gene expression in hematopoietic progenitor cells during commitment to the lymphoid lineage.
abstract: The E2F4 protein is involved in gene repression and cell cycle exit, and also has poorly understood effects in differentiation. We analyzed the impact of E2F4 deficiency on early steps in mouse hematopoietic development, and found defects in early hematopoietic progenitor cells that were propagated through common lymphoid precursors to the B and T lineages. In contrast, the defects in erythromyeloid precursor cells were self-correcting over time. This suggests that E2F4 is important in early stages of commitment to the lymphoid lineage. The E2F4-deficient progenitor cells showed reduced expression of several key lymphoid-lineage genes, and overexpression of two erythromyeloid lineage genes. However, we did not detect effects on cell proliferation. These findings emphasize the significance of E2F4 in controlling gene expression and cell fate.
authors.affiliation: Department of Microbiology and Immunology, David H Smith Center for Vaccine Biology and Immunology, University of Rochester, Rochester, NY 14620, USA.
authors.forename: Megan E
authors.initials: ME
authors.lastname: Enos
authors.forename: Simona A
authors.initials: SA
authors.lastname: Bancos
authors.forename: Timothy
authors.initials: T
authors.lastname: Bushnell
authors.forename: Ian N
authors.initials: IN
authors.lastname: Crispe
mesh_terms: D000818:Animals; D018797:Cell Cycle Proteins / Q000235:genetics / Q000502:physiology; D002454:Cell Differentiation / Q000235:genetics / Q000276:immunology*; D019070:Cell Lineage / Q000235:genetics / Q000276:immunology*; D050703:E2F2 Transcription Factor / Q000172:deficiency / Q000235:genetics / Q000502:physiology*; D005260:Female; D005333:Fetus; D005786:Gene Expression Regulation / Q000276:immunology*; D006412:Hematopoietic Stem Cells / Q000166:cytology* / Q000378:metabolism*; D051740:Ikaros Transcription Factor / Q000172:deficiency / Q000235:genetics; D008099:Liver / Q000166:cytology / Q000276:immunology / Q000378:metabolism; D008214:Lymphocytes / Q000166:cytology* / Q000378:metabolism*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D008822:Mice, Transgenic; D022423:Myeloid Cells / Q000166:cytology / Q000276:immunology / Q000378:metabolism
chemical_list: D018797:Cell Cycle Proteins; D050703:E2F2 Transcription Factor; C484940:E2f2 protein, mouse; C497238:Zfpn1a1 protein, mouse; D051740:Ikaros Transcription Factor