Abstract

Calpains are Ca(2 +) -dependent cysteine proteases. Fifteen gene products of calpains are expressed in mammals. Among them, Calpain 1 and Calpain 2 are ubiquitously expressed and have been investigated extensively. Under the physiological conditions, calpain activity is strictly regulated by endogenous inhibitory protein, Calpastatin. Calpains are activated in the various cardiovascular diseases and implicated in their pathogenesis by degrading numerous target proteins. Here we briefly summarize the physiological and pathological role of calpains in the cardiovascular diseases.

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