Apoptosis: A Basic Pathological Reaction of Injured Neonatal Muscle

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Abstract
A light and electron microscopic study of immature muscle cell degeneration induced by bupivacaine (BPVC) was performed. The pattern of muscle cell death is related to muscle maturity; in newborn rats, cell death has the morphology of apoptosis, whereas in the older animals muscle cell death resembles cell necrosis and the ultrastructural feature of these changes are essentially the same as those described in adult muscle. The ability to undergo apoptosis in response to a pathological stimulus is a common effector mechanism of immature muscle.