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PI3K/Akt‐dependent functions of TFII‐I transcription factors in mouse embryonic stem cells
Author(s) -
Chimge NyamOsor,
Makeyev Aleksandr V.,
Waigel Sabine J.,
Enkhmandakh Badam,
Bayarsaihan Dashzeveg
Publication year - 2012
Publication title -
journal of cellular biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 165
eISSN - 1097-4644
pISSN - 0730-2312
DOI - 10.1002/jcb.23441
Subject(s) - embryonic stem cell , biology , pi3k/akt/mtor pathway , chromatin immunoprecipitation , transcription factor , stem cell , microbiology and biotechnology , downregulation and upregulation , gene , chromatin , microarray analysis techniques , gene expression profiling , ly294002 , gene expression , promoter , genetics , signal transduction
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. J. Cell. Biochem. 113: 1122–1131, 2012. © 2011 Wiley Periodicals, Inc.