Role of transforming growth factor-beta in maintenance of function of cultured neonatal cardiac myocytes. Autocrine action and reversal of damaging effects of interleukin-1

J Clin Invest. 1992 Nov;90(5):2056-62. doi: 10.1172/JCI116087.


The three isoforms of transforming growth factor-beta (TGF-beta) have previously been implicated in embryonic development of the heart as well as in repair of myocardial damage after ischemia/reperfusion injury. TGF-beta 1 has also been localized intracellularly to both mitochondria and contractile filaments of cardiac myocytes, although its role in these structures has not been defined. We now report that exogenous TGF-beta stabilizes the beating rate of neonatal rat cardiac myocytes cultured on fibroblast matrix, and sustains their spontaneous rhythmic beating in serum-free medium. Moreover, using blocking antibodies to TGF-beta, we show that endogenous TGF-beta secreted by these myocytes acts in an autocrine fashion to maintain their beating rate. In contrast, IL-1 beta, an inflammatory mediator secreted by immune cells during myocardial injury, inhibits the beating of cardiac myocytes, and TGF-beta can overcome this inhibition. The antagonistic effects of TGF-beta and IL-1 were not observed when the myocytes were cultured on gelatin, as compared to native fibroblast matrix. The data indicate that TGF-beta is an important regulator of contractile function of the heart and have significant implications for understanding cardiac physiology in health and disease.

MeSH terms

  • Animals
  • Animals, Newborn / physiology
  • Cells, Cultured
  • Heart / drug effects*
  • Heart Rate / drug effects
  • Interleukin-1 / toxicity*
  • Myocardial Contraction / drug effects
  • Rats
  • Transforming Growth Factor beta / pharmacology*


  • Interleukin-1
  • Transforming Growth Factor beta