当前位置： SCI文献检索 > GENERAL AND COMPARATIVE ENDOCRINOLOGY期刊下所有文献 > Effects of pimozide and des Gly10,[D-Ala6]luteinizing hormone-releasing hormone ethylamide on serum gonadotropin concentrations, germinal vesicle migration, and ovulation in female goldfish, Carassius auratus.

Effects of pimozide and des Gly10,[D-Ala6]luteinizing hormone-releasing hormone ethylamide on serum gonadotropin concentrations, germinal vesicle migration, and ovulation in female goldfish, Carassius auratus.

Abstract：

:In gravid female goldfish held at 10-12 degrees, a single injection of des Gly10,[D-Ala6]luteinizing hormone-releasing hormone ethylamide (LHRH-A), or 2 injections of LHRH-A given 12 hr apart, increased serum gonadotropin (GtH) concentrations, but did not stimulate germinal vesicle migration or ovulation. Injection of a dopamine antagonist, pimozide (PIM), increased serum GtH levels. PIM injected with the second of two LHRH-A injections not only potentiated the LHRH-A-induced increase in serum GtH concentrations but also caused germinal vesicle migration and ovulation. PIM injected with, or in place of, the first of two LHRH-A injections increased the frequency of ovulation in fish injected with LHRH-A. Similarly, PIM injected simultaneously with a single LHRH-A injection also increased the number of ovulating fish. These results are consistent with the idea that dopamine inhibits GtH release in goldfish. The results also suggest that the preovulatory surge of GtH secretion is regulated by both a stimulation by GtH-releasing hormone and release from the dopamine inhibition on GtH secretion.

journal_name

Gen Comp Endocrinol

journal_title

General and comparative endocrinology

authors

Chang JP,Peter RE

doi

10.1016/0016-6480(83)90155-7

subject

Has Abstract

pub_date

1983-10-01 00:00:00

pages

30-7

issue

1

eissn

0016-6480

issn

1095-6840

pii

0016-6480(83)90155-7

journal_volume

52

pub_type

杂志文章

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