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The GH/IGF-1 Axis and Heart Failure

Graziella Castellano1, Flora Affuso, Pasquale Di Conza

  • 1Department of Internal Medicine, School of Medicine, University of Naples "Federico II", Naples, Italy.

Current Cardiology Reviews
|August 3, 2010
PubMed

Insights

Growth hormone (GH) and insulin-like growth factor 1 (IGF-1) impact heart function. While GH may benefit chronic heart failure patients, variable responses necessitate further research into GH resistance mechanisms.

Area of Science:

  • Cardiovascular Endocrinology
  • Heart Failure Pathophysiology

Background:

  • The growth hormone (GH)/insulin-like growth factor 1 (IGF-1) axis is crucial for cardiac growth, contractility, and vascular regulation.
  • Dysregulation of the GH/IGF-1 axis is linked to cardiovascular derangements, including those seen in heart failure.
  • Previous studies suggest potential benefits of GH in chronic heart failure (CHF) patients.

Purpose of the Study:

  • To review the role of the GH/IGF-1 axis in cardiovascular function.
  • To evaluate the existing evidence on GH treatment in patients with chronic heart failure (CHF).
  • To explore the reasons for conflicting results in GH therapy for heart failure.

Main Methods:

  • Literature review of experimental and clinical studies on the GH/IGF-1 axis and cardiovascular system.
  • Analysis of clinical trials investigating recombinant GH treatment in patients with dilated cardiomyopathy and chronic heart failure (CHF).
  • Examination of studies assessing GH effects on exercise tolerance and cardiopulmonary performance in CHF.

Main Results:

  • GH/IGF-1 axis influences cardiac contractility, growth, and vascular resistance through various mechanisms.
  • Some studies show improved cardiac function and exercise capacity with GH treatment in CHF patients.
  • Conflicting results exist, potentially due to varying degrees of GH resistance in heart failure patients.

Conclusions:

  • The GH/IGF-1 axis plays a significant role in cardiovascular health and disease.
  • GH therapy shows promise for some chronic heart failure (CHF) patients, but outcomes are inconsistent.
  • Further clinical and experimental research is needed to elucidate mechanisms of variable GH sensitivity in heart failure.

Keywords:
AcromegalyChronic heart failureGH deficiency.GH/IGF-1 axis

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