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  • Title: Calcitonin gene related peptide stimulates differentiation of neonatal rat myogenic cultures.
    Author: Noble BS, McMillan DN, Maltin CA.
    Journal: Growth Regul; 1993 Dec; 3(4):245-8. PubMed ID: 8130730.
    Abstract:
    The effect of the nerve derived peptide, calcitonin gene related peptide (CGRP) on myoblast fusion/differentiation was studied in rat myogenic cell cultures, using creatine kinase activity as an index of fusion. Addition of CGRP at 10(-7) M to myoblast cultures resulted in an enhancement of kinase activity after 11 days of treatment. This response was not accompanied by increased protein content of cultures implying an effect primarily on fusion rather than on myotube growth/size. Neither was it a direct effect on enzyme activity alone since no increase in creatine kinase activity occurred when CGRP was added to mature myotube cultures. These data suggest a role for CGRP in the myoblast fusion process itself and raise questions as to its importance in the growth and development of muscle in vivo.
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