Abstract
Renin-angiotensin system is present in mammalian ovarian follicular fluid and follicles. The demonstration of specific binding sites for angiotensin II in the follicular structures of rats suggests that angiotensin II may be related to the regulation of steroid biosynthesis in the mammalian ovary. Little is known about the presence and the action of angiotensin II in nonmammalian ovaries. An immunocytochemical investigation of angiotensin II in developing ovarian follicles of trout has been carried out. The specific antiserum was raised against (Val5)-angiotensin II of the trout. There was strong immunoreactivity in the ooplasm of endogenous vitellogenic follicles. Angiotensin II immunoreactive material was present in the follicular cells, but not within oocytes at the end of vitellogenesis. Immunocytochemically angiotensin II-like material in the ovary of rainbow trout fluctuates during the cycle of development.
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