Show simple item record

dc.contributor.authorNiwa, Hitoshi
dc.contributor.authorBurdon, Tom
dc.contributor.authorChambers, Ian
dc.contributor.authorSmith, Austin G
dc.coverage.spatial13en
dc.date.accessioned2005-01-14T11:15:27Z
dc.date.available2005-01-14T11:15:27Z
dc.date.issued1998
dc.identifier.citationGENES & DEVELOPMENT 12:2048–2060en
dc.identifier.issn0890-9369/98
dc.identifier.uriwww.genesdev.org
dc.identifier.urihttp://hdl.handle.net/1842/650
dc.description.abstractThe 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.en
dc.format.extent1089266 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisher© 1998 by Cold Spring Harbor Laboratory Pressen
dc.subjectLeukemia inhibitory factoren
dc.subjectcytokine receptoren
dc.subjectsignalingen
dc.subjectstem cellen
dc.subjecttetracyclineen
dc.subjectepisomeen
dc.titleSelf-renewal of pluripotent embryonic stem cells is mediated via activation of STAT3en
dc.typeArticleen


Files in this item

This item appears in the following Collection(s)

Show simple item record