Stimulation of catalase activity in carp (Cyprinus carpio) ovarian follicles by gonadotropin in vitro |
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Authors: | Rahul Behl |
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Institution: | (1) National Bureau of Animal Genetic Resources, P.O. Box 129, GT By-Pass Road (Baldi), Karnal, 132 001, Haryana, India |
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Abstract: | The changes in catalase activity in carp (Cyprinus carpio) ovarian follicles at different developmental stages were investigated. The effect of follicle-stimulating hormone (FSH) on catalase activity and estradiol secretion by carp ovarian follicles was studied to establish a developmental role of catalase in folliculogenesis in fish ovary. The follicular homogenates from large follicles showed higher (9.45 ± 0.64 units/mg protein) catalase-specific activity than the small follicles (2.94 ± 0.22 units/mg protein). The FSH significantly (P < 0.05) stimulated the catalase activity in both size categories of the follicles in vitro. At the dose level of 100 ng FSH/ml culture medium, about 38 and 25% increase in catalase-specific activity was observed compared with the respective controls in small and large follicles respectively. The increase in catalase after FSH treatment was also accompanied by a similar increase in estradiol secretion. This study indicates that catalase might play a functional role in carp ovarian follicles. |
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Keywords: | FSH GTH-1 Subcellular fractions Steroidogenesis Follicular development |
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