Effect of Melatonin and 5‐Methoxytryptamine on Sex Steroids and Thyroid Hormones During the Prespawning Phase of the Annual Reproductive Cycle in the Freshwater Teleost, Clarias batrachus
- 1 October 1987
- journal article
- research article
- Published by Wiley in Journal of Pineal Research
- Vol. 4 (4) , 377-386
- https://doi.org/10.1111/j.1600-079x.1987.tb00877.x
Abstract
Melatonin and 5-methoxytryptamine have been studied in the freshwater teleost Clarias batrachus during the prespawning period. The data have provided evidence of the inhibitory effects on sex steroids and thyroid hormones when the pineal indoleamines melatonin and 5-methoxytryptamine (5-MT) are administered intramuscularly daily in the afternoon for 27 days. The different dose levels had different effects. The higher dose levels of melatonin showed the initiation of counter inhibitory impacts on testosterone and T3, T4 levels. The melatonin acted more effectively than 5-MT.Keywords
This publication has 15 references indexed in Scilit:
- Is 5-methoxytryptamine a pineal hormone?Psychoneuroendocrinology, 1983
- Ability of tryptophan derivatives to mimic melatonin's action upon the Syrian hamster reproductive systemLife Sciences, 1982
- Effect of 5-methoxytryptamine on testicular atrophy induced by experimental or natural short photoperiods in the golden hamster (mesocricetus auratus)Journal Of Neural Transmission-Parkinsons Disease and Dementia Section, 1982
- Effect of 5-methoxytryptophan and 5-methoxytryptamine on the reproductive system of the male golden hamsterJournal Of Neural Transmission-Parkinsons Disease and Dementia Section, 1981
- The independency of an intact pineal gland of the inhibition by 5-methoxytryptamine of the reproductive organs in the male hamsterJournal Of Neural Transmission-Parkinsons Disease and Dementia Section, 1981
- A comparison of ovarian recrudescence in the catfish, Mystus tengara (Ham.), exposed to short photoperiods, to long photoperiods, and to melatoninGeneral and Comparative Endocrinology, 1977
- Effects of melatonin and prolactin treatment on the hypophysial-ovarian system in the catfish, Heteropneustes fossilis (Bloch)General and Comparative Endocrinology, 1976
- The effects of melatonin treatment on gonosomatic index in the teleost, Fundulus similis, and the tree frog, Hyla cinereaGeneral and Comparative Endocrinology, 1974
- Demonstration and effect of melatonin in fishGeneral and Comparative Endocrinology, 1970
- ISOLATION OF MELATONIN, THE PINEAL GLAND FACTOR THAT LIGHTENS MELANOCYTES1Journal of the American Chemical Society, 1958