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Many good reasons to have STAT3 in the heart

Denise Hilfiker-Kleiner1, Andres Hilfiker, Helmut Drexler

  • 1Department of Cardiology and Angiology, Medical School Hannover, Carl-Neuberg Str. 1, Hannover 30625, Germany. hilfiker.denise@mh-hannover.de

Pharmacology & Therapeutics
|June 21, 2005
PubMed

Insights

Signal transducer and activator of transcription 3 (STAT3) plays a dual role in cell processes. STAT3 activation is crucial for heart protection against injury and failure.

Area of Science:

  • Cardiovascular Biology
  • Molecular Biology
  • Oncology

Background:

  • Signal transducer and activator of transcription 3 (STAT3) is a transcription factor involved in diverse physiological processes.
  • Constitutive STAT3 activation drives tumor growth and drug resistance in cancer.
  • STAT3 down-regulation correlates with heart failure, suggesting a protective role in the heart.

Purpose of the Study:

  • To investigate the role of STAT3 in cardiac protection and heart failure pathogenesis.
  • To evaluate the impact of cardiomyocyte-specific STAT3 deletion on cardiac injury and disease.

Main Methods:

  • Utilized conditional knockout (STAT3-KO) mice with cardiomyocyte-restricted STAT3 deletion.
  • Assessed cardiac function and susceptibility to injury models including myocardial ischemia, systemic inflammation, and drug toxicity.
  • Examined the role of STAT3 in age-related heart failure.

Main Results:

  • STAT3-KO mice exhibited increased susceptibility to cardiac injury from ischemia, inflammation, and drug toxicity.
  • STAT3-KO mice showed heightened proneness to age-related heart failure.
  • STAT3 activation promotes cardiomyocyte survival, hypertrophy, and cardiac angiogenesis.

Conclusions:

  • STAT3 is essential for multiple protective mechanisms in the heart against injury and failure.
  • Targeting STAT3 may offer therapeutic strategies for preventing cardiac failure.

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