Literature DB >> 3886475

Pimozide modulates the luteinizing hormone-releasing hormone effect on gonadotrophin release in the African catfish, Clarias lazera.

R de Leeuw, J W Resink, E J Rooyakkers, H J Goos.   

Abstract

In the African catfish the effect of (i) the dopamine antagonist pimozide (PIM), (ii) a luteinizing hormone-releasing hormone analog (LH-RHa), and (iii) a combination of these substances on gonadotrophin (GTH) release and on ovulation was investigated. PIM alone increased plasma GTH levels in juvenile catfish but was ineffective in mature animals. LH-RHa increased plasma GTH levels in both juvenile and mature catfish and within 12 hr after the injection a high rate of ovulation (80%) was observed. PIM potentiated the LH-RHa effect on GTH release and ovulation. It was concluded that dopamine does not effect the GTH release directly, but modulates the effect of endogenous and exogenous gonadotrophin-releasing hormone.

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Year:  1985        PMID： 3886475     DOI： 10.1016/0016-6480(85)90144-3

Source DB:  PubMed          Journal:  Gen Comp Endocrinol        ISSN： 0016-6480            Impact factor:   2.822


  12 in total

1.  Central regulation of reproduction in teleosts.

Authors:  O Kah
Journal:  Fish Physiol Biochem       Date:  1986-10       Impact factor: 2.794

2.  Characterization of the receptor for gonadotropin-releasing hormone in the pituitary of the African catfish,Clarias gariepinus.

Authors:  R De Leeuw; P M Conn; C Van't Veer; H J Goos; P G Van Oordt
Journal:  Fish Physiol Biochem       Date:  1988-05       Impact factor: 2.794

3.  Steroid hormone secretion by testicular tissue from African catfish, Clarias gariepinus, in primary culture: identification and quantification by gas chromatography - mass spectrometry.

Authors:  G J Vermeulen; J G Lambert; M J Lenczowski; H J Goos
Journal:  Fish Physiol Biochem       Date:  1993-07       Impact factor: 2.794

4.  The feedback regulation of pituitary GTH-II secretion in male African catfish (Clarias gariepinus): Participation of 11-ketotestosterone.

Authors:  R W Schulz; H Paczoska-Eliasiewicz; D G Satijn; H J Goos
Journal:  Fish Physiol Biochem       Date:  1993-07       Impact factor: 2.794

5.  Gonadotropin-releasing hormone-immunoreactive neuronal structures in the brain and pituitary of the African catfish, Clarias gariepinus (Burchell).

Authors:  H J Goos; R de Leeuw; C de Zoeten-Kamp; J Peute; S Blähser
Journal:  Cell Tissue Res       Date:  1985       Impact factor: 5.249

6.  Gonadotropin production and release in female goldfish (Carassius auratus) after administration of pimozide and an LHRH analogue as studied by electron microscopy and radioimmunoassay.

Authors:  H Cook; J Peute; H J Goos; M Sokolowska; P G van Oordt; R E Peter
Journal:  Cell Tissue Res       Date:  1987-03       Impact factor: 5.249

7.  Catechol-O-methyltransferase in the brain of the male African catfish,Clarias gariepinus; distribution and significance for the metabolism of catecholestrogens and dopamine.

Authors:  R J Timmers; J G Lambert
Journal:  Fish Physiol Biochem       Date:  1989-06       Impact factor: 2.794

8.  Catecholestrogens inhibit dopamine methylation in the gonadotrops of the African catfish,Clarias gariepinus.

Authors:  L A Van Asselt; R J Timmers; H J Goos; J G Lambert; P G Van Oordt
Journal:  Fish Physiol Biochem       Date:  1989-07       Impact factor: 2.794

9.  Plasma profiles of fourteen ovarian steroids before, during and after ovulation in African catfish,Clarias gariepinus, determined by gas chromatography and mass spectrometry.

Authors:  G H van Dam; W G Schoonen; J G Lambert; P G van Oordt
Journal:  Fish Physiol Biochem       Date:  1989-03       Impact factor: 2.794

10.  Steroidogenesis during induced oocyte maturation and ovulation in the African catfish,Clarias gariepinus.

Authors:  W G Schoonen; J G Lambert; M T Penders; M E Van Roosmalen; R Van den Hurk; H J Goos; P G Van Oordt
Journal:  Fish Physiol Biochem       Date:  1989-03       Impact factor: 2.794
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