Abstract
We investigated the possibility that norepinephrine from the human ovary is released after nerve stimulation and that this neurotransmitter is coupled to a steroidogenic response. Biologically significant levels of both norepinephrine and dopamine were found in human ovarian biopsies. [3H]norepinephrine incorporated in vitro was readily released by electrical stimulation in a Ca2+-dependent process. Ovarian membrane preparations exhibited specific binding sites for the β-adrenergic antagonist [3H]dihydroalprenolol. displacement of [3H]dihydroalprenolol with zinterol (a specific β2-agonist, indicated that 72% of these sites were type β2-receptors. β-receptors were also present on granulosa cells. Stimulation of granulosa cells with luteinizing hormone or the β-agonist isoproterenol increased the release of progesterone after 4 d in culture. These results suggest that the sympathetic nerves present in human ovary are coupled to β-adrenergic receptors present in endocrine cells and, as in nonprimate mammals, appear to participate in the regulation of ovarian function.
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Lara, H.E., Porcile, A., Espinoza, J. et al. Release of norepinephrine from human ovary. Endocr 15, 187–192 (2001). https://doi.org/10.1385/ENDO:15:2:187
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DOI: https://doi.org/10.1385/ENDO:15:2:187