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Effects of intratesticular injections of estradiol and gonadotropin-releasing hormone (GnRHA, HOE 766) on plasma androgen levels in intact and hypophysectomized Torpedo marmorata and Torpedo ocellata.

Abstract：

:The effect of a gonadotropin-releasing hormone analog (GnRHA, HOE766) was studied in hypophysectomized elasmobranch fish Torpedo marmorata and T. ocellata. In addition, estradiol (E2) effects were studied in intact and hypophysectomized (HPX) animals. Plasma androgen concentrations were measured 2 or 6 hr after GnRHA (100 ng or 10 micrograms) or 6 hr after E2 (10(-9) or 10(-6) M) intratesticular injections. Both GnRHA and E2 induced the increase of plasma androgen levels in HPX fish. E2 also enhanced androgen levels in intact animals. It is concluded that GnRH-like substances and E2 may modulate testicular activity in elasmobranch fish.

journal_name

Gen Comp Endocrinol

journal_title

General and comparative endocrinology

authors

Fasano S,Pierantoni R,Minucci S,Di Matteo L,D'Antonio M,Chieffi G

doi

10.1016/0016-6480(89)90169-x

subject

Has Abstract

pub_date

1989-09-01 00:00:00

pages

349-54

issue

3

eissn

0016-6480

issn

1095-6840

journal_volume

75

pub_type

杂志文章

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