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- W2091719073 abstract "cAMP is shown to be directly involved in activating the motile apparatus of bull sperm. Triton X-100-extracted, demembranated (modeled) bull sperm are motile in the presence of ATP. Addition of cAMP to motile demembranated preparations of sperm produced a measured increase in motility. Maximal stimulation was obtained with 8–30 μM cAMP present in the mixture. The stimulation is of the same relative magnitude as obtained by addition of theophylline or caffeine to intact (membrane-bound) sperm. Modeled sperm show no sensitivity to theophylline. The response of the modeled sperm to the addition of cAMP was dependent upon the length of storage of the sperm and the condition of the sperm prior to modeling. Although modeled sperm show no sensitivity to theophylline, theophylline treatment of sperm prior to modeling increases the motility of the models produced and eliminates the sensitivity of the models to cAMP. Inhibiting the energy metabolism of the sperm prior to modeling greatly enhanced the sensitivity of the models to cAMP. We conclude that the effect of cAMP on modeled bull sperm reflects a naturally occurring balance which controls the motility of bull sperm, and that cAMP exerts its stimulatory action directly on the motile apparatus." @default.
- W2091719073 created "2016-06-24" @default.
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- W2091719073 date "1978-01-01" @default.
- W2091719073 modified "2023-09-27" @default.
- W2091719073 title "A cAMP-induced increase in the motility of demembranated bull sperm models" @default.
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- W2091719073 doi "https://doi.org/10.1016/0092-8674(78)90133-2" @default.
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