Abstract
Our objective was to assess relative expression levels of mRNA for calcitonin gene-related peptide-receptor component protein (CGRP-RCP) in human myometrium in various physiological states. Using semiquantitative reverse transcriptase polymerase chain reaction (RT-PCR), we analyzed myometrial samples from 46 women (10 menopausal, 10 nongravid premenopausal, 19 gravidae, and 7 premenopausal misoprostol-treated nongravid women) for the specific expression of CGRP-RCP mRNA. The expression of CGRP-RCP was significantly increased in gravid compared with nongravid myometrium ( P < 0.002). No significant differences in CGRP-RCP expression were found among the other study groups. We concluded that the increased mRNA expression CGRP-RCP in gravid myometrium supports the possibility of involvement of CGRP in the control of myometrial contractility. Additional studies are necessary to evaluate the exact mechanism of action of CGRP and CGRP-RCP in human myometrium.
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