title: PI3K/Akt-dependent functions of TFII-I transcription factors in mouse embryonic stem cells.
abstract: Activation of PI3K/Akt signaling is sufficient to maintain the pluripotency of mouse embryonic stem cells (mESC) and results in down-regulation of Gtf2i and Gtf2ird1 encoding TFII-I family transcription factors. To investigate how these genes might be involved in the process of embryonic stem cell differentiation, we performed expression microarray profiling of mESC upon inhibition of PI3K by LY294002. This analysis revealed significant alterations in expression of genes for specific subsets of chromatin-modifying enzymes. Surprisingly, genome-wide promoter ChIP-chip mapping indicated that the majority of differently expressed genes could be direct targets of TFII-I regulation. The data support the hypothesis that upregulation of TFII-I factors leads to activation of a specific group of developmental genes during mESC differentiation.
authors.affiliation: Department of Reconstructive Sciences, Center for Regenerative Medicine and Skeletal Development, School of Dentistry, University of Connecticut Health Center, 262 Farmington Avenue, Farmington, CT 06030, USA.
authors.forename: Nyam-Osor
authors.initials: NO
authors.lastname: Chimge
authors.forename: Aleksandr V
authors.initials: AV
authors.lastname: Makeyev
authors.forename: Sabine J
authors.initials: SJ
authors.lastname: Waigel
authors.forename: Badam
authors.initials: B
authors.lastname: Enkhmandakh
authors.forename: Dashzeveg
authors.initials: D
authors.lastname: Bayarsaihan
mesh_terms: D000818:Animals; D002460:Cell Line; D047369:Chromatin Immunoprecipitation; D002867:Chromones / Q000494:pharmacology; D053595:Embryonic Stem Cells / Q000201:enzymology / Q000378:metabolism*; D004791:Enzyme Inhibitors / Q000494:pharmacology; D051379:Mice; D009025:Morpholines / Q000494:pharmacology; D019869:Phosphatidylinositol 3-Kinases / Q000378:metabolism*; D000081082:Phosphoinositide-3 Kinase Inhibitors; D051057:Proto-Oncogene Proteins c-akt / Q000378:metabolism*; D034741:RNA, Small Interfering; D060888:Real-Time Polymerase Chain Reaction; D019473:Transcription Factors, TFII / Q000502:physiology*
chemical_list: D002867:Chromones; D004791:Enzyme Inhibitors; D009025:Morpholines; D019869:Phosphatidylinositol 3-Kinases; D000081082:Phosphoinositide-3 Kinase Inhibitors; D051057:Proto-Oncogene Proteins c-akt; D034741:RNA, Small Interfering; D019473:Transcription Factors, TFII; C486330:Gtf2i protein, mouse; C085911:2-(4-morpholinyl)-8-phenyl-4H-1-benzopyran-4-one