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Radioreceptor and autoradiographic analysis of FSH, hCG and prolactin binding sites in primary to antral hamster follicles during the periovulatory period


, : Radioreceptor and autoradiographic analysis of FSH, hCG and prolactin binding sites in primary to antral hamster follicles during the periovulatory period. Journal of Reproduction and Fertility 79(1): 307-313

As measured by radioreceptor assays, binding sites for FSH and prolactin were present at 09:00 h on the day of pro-oestrus in Stage 1-10 follicles (primary to antral) with prolactin receptors 3-6 times higher than FSH sites in Stages 1-3 (3 layers of granulosa cells). Specific binding sites for hCG were present in Stage 1 and 2 follicles (2 layers of granulosa cells) but thereafter their distribution was erratic and they were not consistently detectable until Stage 5, when thecal cells first appeared. Using topical autoradiography, specific binding for FSH was evident in Stage 1-4 follicles (4 layers granulosa cells) whereas specific hCG-binding was not. After the preovulatory gonadotrophin surges, by 21:00 h on pro-oestrus, FSH receptors declined in Stages 5-10, prolactin receptors fell in stages 8 and 10 (small and large antral follicles) and hCG receptors were reduced in Stages 7 (start of antral cavity) to 10. On the morning of oestrus, for follicles from Stage 4 onwards, receptor numbers usually returned to levels found at 09:00 h on pro-oestrus. At oestrus, the few remaining Stage 10 follicles were all atretic and contained significantly reduced FSH and prolactin receptors but numbers of hCG binding sites comparable to those at 09:00 h of pro-oestrus. These results provide evidence of gonadotropin receptors in small primary and secondary follicles which is consistent with increased DNA synthesis in small hamster follicles which is consistent with increased DNA synthesis in small hamster follicles on the afternoon of pro-oestrus and on the morning and afternoon of oestrus. Periovulatory changes in gonadotrophin concentrations may therefore affect early stages of folliculogenesis.

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Accession: 006255016

PMID: 3820181

DOI: 10.1530/jrf.0.0790307

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Other references

Loones, M.T., 1971: Fragmentation par les rayons x de l'organisateur d'une differenciation de chromosome en ecouvillon (lampbrush), chez Pleurodeles waltlii. Chromosoma: 112-118

Smith, R. E., 1944: Relative value of sulphur and of oil in control of mites. A review of the life history of Tetranychus pacificas is followed by notes on treatment with colloidal sulphur and other sulphur-containing sprays and dusts. The use of oil for this mite is confined to the summer, two sprays generally being necess...

Iancu O. G.; Miura Y.; Yanai K., 1995: Mineralogical effects of shock metamorphism and composition of olivine from the Mocs (syn. Moci) chondrite. Romanian Journal of Mineralogy 77(1, Suppl

Lotiyev B. K.; Salamov R. A.; Istratov I. V., 1980: Prospects for petroleum and gas exploration in the Northern Caucasus. Izvestiya Vysshikh Uchebnykh Zavedeniy Neft' i Gaz

Hegstad, S.; Ingebrigtsen, K.; Reistad, R.; Paulsen, J. E.; Alexander, J., 2000: Incorporation of the food mutagen 2-amino-1-methyl-6-phenylimidazo pyridine into hair of mice. The incorporation of the food mutagen 2-amino-1-methyl-6-phenylimidazo(4,5-b)pyridine (PhIP) into hair of newborn mice was investigated in order to contribute to the validation of PhIP in hair as a suitable biomarker for human dietary exposure. Bl...

Edgren, Richard A., 1960: The effects of various steroid hormones on estrone- and estriol-induced changes in vaginal smears of spayed mice. Vaginal smear changes induced in spayed mice by estrone (2 [mu]g) or estriol (30 [mu]g) were inhibited by testosterone propionate. Progesterone, desoxycorticosterone acetate and cortisone acetate were in active at doses of 1000 [mu]g for the corti...

Kolodgie F.D.; Virmani R.; Osmialowski A.; Zimmerman P.; White C.; Forman M.B.; Mernger W., 1987: Intracoronary infusion of perfluorochemical leads to myocardial protection during balloon angioplasty. Clinical Research 35(3): 293A

Green, H.V., 1963: The world of nearby in close up. Canadon: 54-57

Papavassiliou, E. D.; Theodoropoulos, I.; Economopoulos, P., 2001: The aging effect on liver biochemistry. Gastroenterology 120(5 Supplement 1): A 379, April

Mahmud, A. B.; And Devendra, C., 1970: Repeatability of milk yield and birth weights of goats in Malaya. II. Birth weight. Data were analysed on 254 kids born during 1950-65 of local, 1/2 Anglo-Nubian x local (1/2 A.N.) and <pounds> Anglo-Nubian x local (3/4 A.N.) crossbred goats. Kid birth weight correction factors were obtained for sex, parity of dam and litte...