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- W2020069098 abstract "Cortisol produced biochemical pathway-specific effects on metabolic enzymes and other macromolecules in the freshwater catfish, Clarias batrachus. Injection of cortisol increased 1.6-fold activity of citrate synthase (CS) in brain, liver and skeletal muscle of the fish over vehicle-injected control, while administration of metyrapone (a cortisol synthesis inhibitor) reduced CS activity by 52%. Cortisol treatment of metyrapone-treated fish induced CS activity by approximately 2.5-fold, which was blocked after administration of actinomycin D or cycloheximide. This shows de novo synthesis of CS to enhance aerobic capacity of fish. In contrast the activities of glucose-6-phosphate dehydrogenase (G6-PDH) and lactate dehydrogenase (LDH) increased in response to metyrapone and decreased after administration of cortisol in all the three tissues. The cortisol-mediated decrease in G6-PDH and LDH activities reflects reduction in biosynthetic and anaerobic capacity of fish. Administration of metyrapone significantly increased RNA/DNA ratio and protein but cortisol decreased these macromolecular contents in brain, liver and skeletal muscle. It shows cortisol-induced decrease in protein synthesis capacity of fish. The present study suggests that cortisol-induces catabolic and aerobic but inhibits anabolic and anaerobic processes in freshwater catfish. The cortisol-dependent metabolic responses may also be associated with the permissive effect of cortisol on other hormone(s) in fish." @default.
- W2020069098 created "2016-06-24" @default.
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- W2020069098 date "2003-11-01" @default.
- W2020069098 modified "2023-09-24" @default.
- W2020069098 title "Pathway-specific response to cortisol in the metabolism of catfish" @default.
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- W2020069098 doi "https://doi.org/10.1016/s1096-4959(03)00249-5" @default.
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