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- W1974844037 abstract "The effects of calcitonin gene-related peptide (CGRP) and CGRP 8-37 on the neonatal mouse gubernaculum were examined in organ culture, with the aim of seeing whether CGRP has a direct effect on the gubernaculum. A total of 440 gubernacula were studied. Two hundred and fifty gubernacula were treated with CGRP in concentrations ranging from 0-714 nM/liter. With increasing doses of CGRP the percentage of gubernacula showing vigorous contraction increased from 18-50%. The total percentage of gubernacula showing any form of contraction increased from 76-96%. One hundred and fifty gubernacula were exposed to the CGRP analog CGRP 8-37. Increasing concentrations of CGRP 8-37 from 179-714 nM/liter decreased the rate of vigorous contraction from 18-4%. The percentage of gubernacula showing any degree of contraction decreased from 76-14%. Forty gubernacula removed from testicular feminization (TFM) mice were exposed to varying concentrations of CGRP. In the absence of exogenous CGRP no contractility was observed. By contrast, in the presence of CGRP the gubernacula showed vigorous contractility increasing from 38-90%. The total number of gubernacula showing contraction increased from 75-100%. These studies demonstrated that the neonatal mouse gubernaculum exhibits a high level of endogenous contractility, which can be enhanced in a dose responsive manner with exogenous CGRP. CGRP 8-37 caused a dose responsive inhibition. The androgen-insensitive gubernaculum from the TFM mouse showed no endogenous contraction, but on exposure to CGRP showed an enhanced rate of contractility. These results are consistent with the hypothesis that androgens may control gubernacular migration indirectly via release of CGRP from the genitofemoral nerve in the inguinoscrotal region. The failure of gubernacular motility in vitro and migration in vivo in the TFM mouse may indicate lack of CGRP release from the genitofemoral nerve." @default.
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- W1974844037 date "1992-12-01" @default.
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- W1974844037 title "Testicular descent. III. The neonatal mouse gubernaculum shows rhythmic contraction in organ culture in response to calcitonin gene-related peptide." @default.
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- W1974844037 doi "https://doi.org/10.1210/endo.131.6.1446625" @default.
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