A possible Involvement of Prostaglandin E_2 in the Reproduction of Female Crested Newt, Triturus carnifex(Endocrinology)

概要

論文の詳細を見る
Plasma prostaglandin E_2 (PGE_2), prostaglandin F_<2α> (PGF_<2α>), and sex steroid hormones (progesterone, androgens, and 17β-estradiol) were determined in the female crested newt, Triturus carnifex, during the annual reproductive cycle. In vivo experiments were carried out to study the effects of PGE_2 and PGF_<2α> on plasma sex steroid hormones during prereproduction, reproduction, and postreproduction; simultaneously, in vitro experiments were performed to study the effects of these two prostaglandins on sex steroid hormones ovarian release. The effects of one week's captivity on PGE_2, PGF_<2α> and sex steroid hormones were also evaluated. The PGE_2 plasma level was low from October to December, then it rapidly increased to peak in March, after which it soon fell to reach its minimum value in May. Plasma PGF_<2α> and sex steroid hormones showed similar trends to those found in previous studies. From December to April, the PGE_2 plasma values were negatively correlated to those of PGF_<2α> and positively to those of androgens; PGF_<2α> plasma values were positively correlated to those of estradiol. PGE_2 in vivo treatment increased plasma progesterone and decreased 17β-estradiol in April, while PGF_<2α> induced the opposite effects in the same month; PGE_2 increased androgens in January and March, and PGF_<2α> increased androgens in April. The in vitro experiments were in agreement. These results suggest that PGE_2 and PGF_<2α> play opposite role(s) in the reproductive processes of the female Triturus carnifex. PGE_2 could be involved in the reproduction processes through androgen secretion, while PGF_<2α> in the ending of reproduction through estradiol increase.
1992-06-15

A possible Involvement of Prostaglandin E_2 in the Reproduction of Female Crested Newt, Triturus carnifex(Endocrinology)

スポンサーリンク

概要

著者

関連論文

スポンサーリンク