Essential role of STAT3 for embryonic stem cell pluripotency

Regina Raz, Chien Kuo Lee, Linda A. Cannizzaro, Peter D'Eustachio, David E. Levy

Research output: Contribution to journalArticle

280 Citations (Scopus)

Abstract

Propagation of mouse embryonic stem (ES) cells in vitro requires exogenous leukemia inhibitory factor (LIF) or related cytokines. Potential downstream effectors of the LIF signal in ES cells include kinases of the Src, Jak, and mitogen-activated protein families and the signal transducer and transcriptional activator STAT3. Activation of nuclear STAT3 and the ability of ES cells to grow as undifferentiated clones were monitored during LIF withdrawal. A correlation was found between levels of STAT3 activity and maintenance of an undifferentiated phenotype at clonal density. In contrast, variation in STAT3 activity did not affect cell proliferation. The requirement for STAT3 was analyzed by targeted mutagenesis in ES cell lines exhibiting different degrees of LIF dependency. An insertional mutation was devised that abrogated Stat3 gene expression but could be reversed by Cre recombination-mediated excision. ES cells heterozygous for the Stat3 mutation could be isolated only from E14 cells, the line least dependent on LIF for self-renewal. Targeted clones isolated from other ES cell lines were invariably trisomic for chromosome 11, which carries the Stat3 locus, and retained normal levels of activated STAT3. Cre-regulated reduction of Stat3 gene copy number in targeted, euploid E14 clones resulted in dose-dependent losses of STAT3 activity and the efficiency of self-renewal without commensurate changes in cell cycle progression. These results demonstrate an essential role for a critical amount of STAT3 in the maintenance of an undifferentiated ES cell phenotype.

Original languageEnglish (US)
Pages (from-to)2846-2851
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume96
Issue number6
DOIs
StatePublished - Mar 16 1999

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Leukemia Inhibitory Factor
Embryonic Stem Cells
Clone Cells
Cell Line
Maintenance
Phenotype
Chromosomes, Human, Pair 11
Mutation
Gene Dosage
src-Family Kinases
Transducers
Mitogens
Mutagenesis
Genetic Recombination
Cell Cycle
Cell Proliferation
Cytokines
Gene Expression
Proteins

Keywords

  • Cytokine signaling
  • Embryonic stem cell differentiation
  • JAK-STAT pathway
  • Leukemia inhibitory factor

ASJC Scopus subject areas

  • Genetics
  • General

Cite this

Essential role of STAT3 for embryonic stem cell pluripotency. / Raz, Regina; Lee, Chien Kuo; Cannizzaro, Linda A.; D'Eustachio, Peter; Levy, David E.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 96, No. 6, 16.03.1999, p. 2846-2851.

Research output: Contribution to journalArticle

Raz, Regina ; Lee, Chien Kuo ; Cannizzaro, Linda A. ; D'Eustachio, Peter ; Levy, David E. / Essential role of STAT3 for embryonic stem cell pluripotency. In: Proceedings of the National Academy of Sciences of the United States of America. 1999 ; Vol. 96, No. 6. pp. 2846-2851.
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