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Touched and moved by STAT3

S Paul Gao1, Jacqueline F Bromberg

  • 1Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.

Science'S STKE : Signal Transduction Knowledge Environment
|July 13, 2006
PubMed

Insights

Signal transducer and activator of transcription 3 (STAT3) has a newly discovered role in cell migration. Non-tyrosine-phosphorylated STAT3 disrupts microtubule interactions, promoting cell movement.

Area of Science:

  • Cell biology
  • Molecular biology
  • Biochemistry

Background:

  • Signal transducer and activator of transcription 3 (STAT3) is a transcription factor known to regulate cell motility.
  • The established role of STAT3 involves its transcriptional activity.

Purpose of the Study:

  • To investigate a novel mechanism of STAT3 in cell migration.
  • To explore the role of non-tyrosine-phosphorylated, cytoplasmic STAT3 in cell movement.

Main Methods:

  • Investigated the interaction between STAT3 and stathmin.
  • Analyzed the effect of STAT3 on microtubule dynamics.
  • Studied the role of non-tyrosine-phosphorylated STAT3 in cell migration.

Main Results:

  • Identified a novel function for non-tyrosine-phosphorylated STAT3 in the cytoplasm.
  • Demonstrated that STAT3 disrupts the interaction between microtubules and stathmin.
  • Showed that STAT3 association with stathmin enhances microtubule polymerization and cell movement.

Conclusions:

  • Non-tyrosine-phosphorylated STAT3 plays a critical role in mediating cell migration.
  • STAT3's interaction with stathmin offers a new target for understanding and potentially modulating cell motility.

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