TESTOSTERONE VERSUS THYROID HORMONE IN THE REGULATION OF OXIDATIVE METABOLISM IN TWO SPECIES OF REPTILES

in Journal of Endocrinology
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J. P. THAPLIYAL
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ASHA CHANDOLA
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D. SURESH KUMAR
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O. V. OOMMEN
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Department of Zoology, Banaras Hindu University, Varanasi 221005, India

(Received 18 June 1974)

Male hormone has been classically attributed a primary role in the maintenance of reproductive function in male vertebrates. Thyroid hormone on the other hand has been shown to control oxidative metabolism in homeotherms, but its role in poikilothermous animals has not been established, except in reptiles (see reviews by Dodd & Matty, 1964; Lynn, 1970). Recently oxidative metabolism was shown to be influenced by testosterone in three species of reptiles, namely, Calotes versicolor (Chandola, Kumar & Thapliyal, 1974a), Natrix piscator (Thapliyal, Kumar & Garg, 1974) and Hemidactylus flaviviridis (Chandola et al. 1974b). Castration in all these species resulted in a significant decrease and administration of testosterone in a significant increase in the oxygen consumption of isolated liver and skeletal muscle tissues (at 30 °C). Testosterone also restored the decline in oxygen consumption in castrated animals to normal

 

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