Stat3 Activation Is Required for Cellular Transformation by v- src

Author:

Bromberg Jacqueline F.1,Horvath Curt M.1,Besser Daniel2,Lathem Wyndham W.1,Darnell James E.1

Affiliation:

1. Laboratory of Molecular Cell Biology 1 and

2. Laboratory of Molecular Oncology, 2 The Rockefeller University, New York, New York 10021-6399

Abstract

ABSTRACT Stat3 activation has been associated with cytokine-induced proliferation, anti-apoptosis, and transformation. Constitutively activated Stat3 has been found in many human tumors as well as v- abl - and v- src -transformed cell lines. Because of these correlations, we examined directly the relationship of activated Stat3 to cellular transformation and found that wild-type Stat3 enhances the transforming potential of v- src while three dominant negative Stat3 mutants inhibit v- src transformation. Stat3 wild-type or mutant proteins did not affect v- ras transformation. We conclude that Stat3 has a necessary role in v- src transformation.

Publisher

American Society for Microbiology

Subject

Cell Biology,Molecular Biology

Reference37 articles.

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3. Bromberg J. and J. E. Darnell Jr. Unpublished observations.

4. Transcriptionally active Stat1 is required for the antiproliferative effects of both interferon alpha and interferon gamma;Bromberg J. F.;Proc. Natl. Acad. Sci. USA,1996

5. Constitutive activation of JAK1 in Src-transformed cells;Campbell G. S.;J. Biol. Chem.,1997

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