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Keywords:

  • staurosporine;
  • cytoskeleton;
  • actin;
  • apoptosis;
  • chelerythrine;
  • calcium cardiomyocytes

Abstract

Staurosporine produced DNA fragmentation characteristic of apoptosis and a dramatic alteration of cell structure that include alterations of cytoskeletal actin and cytoplasmic condensation with vacuolization. These changes were not induced by chelerythrine, a more specific PKC inhibitor than staurosporine. The calcium chelator, BAPTA, significantly reduced staurosporine-induced DNA fragmentation but did not affect staurosporine-induced changes in cytoskeletal actin. These data suggest that DNA fragmentation and actin degradation in apoptosis, induced by staurosporine, are under different regulatory control by calcium.