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Inhibition of ovarian luteinizing hormone (LH) and follicle-stimulating hormone receptor levels with an LH-releasing hormone agonist during the estrous cycle in the rat.

Abstract：

:A single injection of the luteinizing hormone (LH)-releasing hormone (LHRH) agonist [D-Ala6,des-Gly-NH2(10)]LHRH ethylamide to female rats on diestrus I produced a marked reduction in ovarian LH/human chorionic gonadotropin (hCG) and follicle-stimulating hormone (FSH) receptor levels, uterine weight, and plasma progesterone levels measured 2 days later on expected proestrus. A maximal inhibitory effect was seen after a dose of only 40 ng of the peptide. No consistent effect of the LHRH analog was seen on ovarian prolactin receptors. When the analog was injected on day 7 of pregnancy, the inhibition of ovarian LH/hCG receptors was of shorter duration and was much less sensitive than that in nonpregnant animals. These data indicate that ovarian LH and FSH receptors levels are highly sensitive to changes in endogenous gonadotropin secretion and suggest that the gonadotropin surge occurring spontaneously on proestrus may play an important role in the regulation of ovarian gonadotropin receptors during the estrous cycle.

journal_name

Fertil Steril

journal_title

Fertility and sterility

authors

Kledzik GS,Cusan L,Auclair C,Kelly PA,Labrie F

doi

10.1016/s0015-0282(16)43524-7

subject

Has Abstract

pub_date

1978-09-01 00:00:00

pages

348-53

issue

3

eissn

0015-0282

issn

1556-5653

pii

S0015-0282(16)43524-7

journal_volume

30

pub_type

杂志文章

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