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Journal of Clinical Endocrinology & Metabolism, Vol 59, 970-973, Copyright © 1984 by Endocrine Society

ARTICLES

Presence of oxytocin and arginine vasopressin in human ovary, oviduct, and follicular fluid

JM Schaeffer, J Liu, AJ Hsueh and SS Yen

Oxytocin and arginine vasopressin (AVP) immunoreactivity in human ovary, oviduct, and follicular fluid were measured and found to coelute with the authentic peptides using both gel filtration column chromatography and reverse phase thin layer chromatography. In ovarian tissue, mean oxytocin and AVP concentrations were 0.48 and 0.24 ng/mg protein, respectively. These values are approximately 4000-fold higher than peripheral plasma levels. The concentration of oxytocin in the corpus luteum was approximately 6-fold greater (3.12 ng/mg protein) than that in ovarian tissue with no corpus luteum. In contrast, no significant difference in the concentration of AVP was found between corpus luteal and the remaining ovarian tissues. Follicular fluid contained 299 and 131 pg/ml oxytocin and AVP, respectively. These levels were 30-fold greater than the serum level of either peptide, suggesting ovarian synthesis of the neurohypophyseal hormones. In addition, immunoreactive oxytocin and AVP were detected in the oviducts (1.01 and 0.24 ng/mg protein, respectively); however, neither peptide was detectable in myometrial tissue (less than 0.02 ng/mg protein). Our results demonstrate the presence of high concentrations of oxytocin and AVP in human ovarian and oviductal tissues as well as follicular fluid and suggest that neurohypophyseal peptides have a paracrine role in the regulation of ovarian or oviductal functions.


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