In vitro synthesis of progesterone by swine corpora lutea.
نویسندگان
چکیده
منابع مشابه
Contrasting effects of prolactin on luteal and follicular steroidogenesis.
To determine whether prolactin affects both luteal and follicular production of testosterone and oestradiol, pseudopregnant rats, either intact or hypophysectomized on day 8, were injected daily between days 8 and 9 with 1.5 i.u. human chorionic gonadotrophin (hCG), 250 micrograms prolactin or a combination of both. Control rats were given vehicle. On day 9, blood was obtained from the ovarian ...
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I T has been demonstrated that exogenous progesterone exerts a stimulatory effect on ovulation in cattle (Hansel and Trimberger, 1952) as well as an inhibitory effect (Ulberg, Christian and Casida, 1951; Trimberger and Hansel, 1955; Nellor and Cole, 1957; Labhsetwar et al., 1964). However, the role of endogenous luteal progesterone in the regulation of bovine corpus luteum formation and functio...
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We analyzed the localizatien ofsteroidogenic enzymes (P450 scc, 3 B HSD, P450 arorn and P450 c17) in the corpora lutea oftwo Hokkaido sika deer (Cervus nippon oresoensis) during the early mating season. Two corpora lutea were found in each female and the timing of formation of the corpora lutea seemed diflbrent. P450 scc, and 3 B HSD, positive luteal cells were fbund in both corpora lutea. The ...
متن کاملThe relationship between day of formation and functional life span of induced corpora lutea in the pig.
Corpora lutea induced in pigs on Day 6 regressed with the naturally formed corpora lutea towards the end of the cycle. Hormonal induction of corpora lutea on Days 8, 10 or 16 significantly prolonged the cycle despite involution of the original corpora lutea about 16 days after ovulation. The interval between the exogenous administration of hcg and the appearance of the next oestrus varied with ...
متن کاملAssessment of the mechanism by which prolactin stimulates progesterone production by early corpora lutea of pigs.
Previously, we reported that administration of prolactin (PRL) during the early luteal phase in sows increases plasma progesterone concentrations. In the current study, we searched for the mechanisms by which PRL exerts this luteotrophic effect. The objectives of the study were (1) to examine the effect of PRL and/or low-density lipoproteins (LDL) on progesterone production by porcine luteal ce...
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ورودعنوان ژورنال:
- Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine
دوره 104 شماره
صفحات -
تاریخ انتشار 1960