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Modern data concerning expression, localization, biophysical properties, involvement in calcium regulation, and physiological functions of TRP and Orai channels in skeletal muscle cells are analyzed. In skeletal muscles TRPC1/2/3/4/5/6/7, TRPV2/4, TRPM2/7 and Orai1/3 channels are expressed. Activities of TRPC1/3 and TRPV4 facilitate maximal muscle contraction during tetanus. Orai1 channels provide recovery of intracellular calcium stores and are obligatory for proliferation of myoblasts and differentiation of skeletal muscles. TRPC1 knockout results in alterations of the development of skeletal muscles. Enhanced calcium influx via the channels is supposed to be a pathogenic factor of myodystrophy.
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П. В. Авдонин (2012) studied this question.
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