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Targeted disruption of the mouse Stat3 gene leads to early embryonic lethality.

Signal transducer and activator of transcription (STAT) proteins have been shown to mediate biological actions in response to cytokines. Stat3, a member of the STAT family, is activated by a variety of cytokines, including the interleukin 6 family of cytokines, leptin, granulocyte colony-stimulating factor, and epidermal growth factor. To address the biological function of Stat3, we generated mice deficient in Stat3 by gene targeting. No viable Stat3-deficient mice could be obtained from heterozygote intercross. Analysis of embryos at several gestation times revealed that Stat3-deficient embryos showed a rapid degeneration between embryonic days 6.5 and 7.5, although they developed into the egg cylinder stage until embryonic day 6.0. These results demonstrate that Stat3 is essential for the early development of mouse embryos.

Pubmed ID: 9108058


  • Takeda K
  • Noguchi K
  • Shi W
  • Tanaka T
  • Matsumoto M
  • Yoshida N
  • Kishimoto T
  • Akira S


Proceedings of the National Academy of Sciences of the United States of America

Publication Data

April 15, 1997

Associated Grants


Mesh Terms

  • Animals
  • DNA-Binding Proteins
  • Embryonic and Fetal Development
  • Female
  • Mice
  • Mice, Knockout
  • Pregnancy
  • STAT3 Transcription Factor
  • Signal Transduction
  • Trans-Activators