PMID: 9177583Feb 1, 1997Paper

Apoptosis of skeletal and cardiac muscles and physical exercise

Aging : Clinical and Experimental Research
U Carraro, C Franceschi

Abstract

Besides the well-known reciprocal influences of skeletal muscle and heart during and after physical exercise, a new perspective is emerging on the short- and long-term effects of exercise-induced damage, in particular the pathogenic role of inappropriate apoptosis in skeletal and cardiac muscle. Cells from multicellular organisms self-destruct when they are no longer needed, or have become damaged; they do this by activating a genetically controlled cell suicide machinery that leads to programmed cell death (PCD), or apoptosis. Apoptosis is a specific form of programmed cell death that plays an important role in development, growth regulation and disease. Skeletal muscles in adult animals are fully differentiated syncytial cells. Apoptosis, which is known to be present in tissues that modulate their cellular homeostasis under the influence of growth and/or hormonal factors, has been recently described in early stages of myocardial infarct, and in dystrophic skeletal muscle. The role and the cellular and molecular aspects of muscle cell death and apoptosis are far from clear, particularly following several types of muscle damage (genetic defects, exercise-induced damage, oxidative stress, etc.). It can be predicted that apoptosi...Continue Reading

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Apoptosis

Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis