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• W2065786458 endingPage "2060" @default.
• W2065786458 startingPage "2048" @default.
• W2065786458 abstract "The propagation of embryonic stem (ES) cells in an undifferentiated pluripotent state is dependent on leukemia inhibitory factor (LIF) or related cytokines. These factors act through receptor complexes containing the signal transducer gp130. The downstream mechanisms that lead to ES cell self-renewal have not been delineated, however. In this study, chimeric receptors were introduced into ES cells. Biochemical and functional studies of transfected cells demonstrated a requirement for engagement and activation of the latent trancription factor STAT3. Detailed mutational analyses unexpectedly revealed that the four STAT3 docking sites in gp130 are not functionally equivalent. The role of STAT3 was then investigated using the dominant interfering mutant, STAT3F. ES cells that expressed this molecule constitutively could not be isolated. An episomal supertransfection strategy was therefore used to enable the consequences of STAT3F expression to be examined. In addition, an inducible STAT3F transgene was generated. In both cases, expression of STAT3F in ES cells growing in the presence of LIF specifically abrogated self-renewal and promoted differentiation. These complementary approaches establish that STAT3 plays a central role in the maintenance of the pluripotential stem cell phenotype. This contrasts with the involvement of STAT3 in the induction of differentiation in somatic cell types. Cell type-specific interpretation of STAT3 activation thus appears to be pivotal to the diverse developmental effects of the LIF family of cytokines. Identification of STAT3 as a key transcriptional determinant of ES cell self-renewal represents a first step in the molecular characterization of pluripotency." @default.
• W2065786458 created "2016-06-24" @default.
• W2065786458 creator A5054950667 @default.
• W2065786458 creator A5064949815 @default.
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• W2065786458 creator A5085359324 @default.
• W2065786458 date "1998-07-01" @default.
• W2065786458 modified "2023-10-04" @default.
• W2065786458 title "Self-renewal of pluripotent embryonic stem cells is mediated via activation of STAT3" @default.
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• W2065786458 doi "https://doi.org/10.1101/gad.12.13.2048" @default.
• W2065786458 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/316954" @default.
• W2065786458 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9649508" @default.
• W2065786458 hasPublicationYear "1998" @default.
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