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JAKs and STATs branch out

J Briscoe1, F Kohlhuber, M Müller

  • 1Imperial Cancer Research Fund Laboratories, PO Box 123, 44 Lincoln's Inn Fields, London, UK WC2A 3PX.

Trends in Cell Biology
|September 1, 1996
PubMed

Insights

The Janus kinase- (JAK) and Signal transducer and activator of transcription (STAT) pathway regulates gene expression via cytokines. This pathway involves JAKs phosphorylating STATs, which then activate gene transcription.

Area of Science:

  • Molecular Biology
  • Cell Signaling
  • Genetics

Background:

  • The Janus kinase- (JAK) and Signal transducer and activator of transcription (STAT) pathway is a critical signaling cascade utilized by numerous cytokines.
  • This pathway mediates cellular responses to external stimuli by regulating gene expression.

Purpose of the Study:

  • To summarize the fundamental mechanisms of the JAK-STAT signaling pathway.
  • To highlight recent findings expanding the understanding of JAK-STAT interactions with other signaling networks.

Main Methods:

  • Review of existing literature on JAK-STAT signaling.
  • Analysis of cytokine-mediated gene regulation.
  • Examination of protein-protein interactions within signaling cascades.

Main Results:

  • Cytokines activate JAKs, which phosphorylate and activate STATs.
  • Activated STATs dimerize, translocate to the nucleus, and induce gene transcription.
  • Emerging evidence shows cross-talk between JAK-STAT and other signaling pathways, including non-JAK kinases and serine phosphorylation.

Conclusions:

  • The JAK-STAT pathway is a central regulator of gene expression, activated by cytokines.
  • The pathway exhibits complex interactions with other signaling networks, indicating a broader role in cellular communication.
  • Further research into these cross-connections will elucidate more comprehensive signaling mechanisms.

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