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Metabolic and cellular stress responses of catfish, Horabagrus brachysoma (Günther, 1864) acclimated to increasing temperatures

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Title Metabolic and cellular stress responses of catfish, Horabagrus brachysoma (Günther, 1864) acclimated to increasing temperatures
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Creator Dalvi RS, Das T, Debnath D, Yengkokpam S, Baruah K, Tiwari LR, Pal AK
 
Subject HSP70; Horabagrus brachysoma; Metabolic enzymes; Secondary stress responses; Thermal acclimation
 
Description Not Available
We investigated the metabolic and cellular stress responses in an endemic catfish Horabagrus brachysoma acclimated to ambient (26°C), 31, 33 and 36°C for 30 days. After acclimation, fish were sampled to investigate changes in the levels of blood glucose, tissue glycogen and ascorbic acid, activities of enzymes involved in glycolysis (LDH), citric acid cycle (MDH), gluconeogenesis (FBPase and G6Pase), pentose phosphate pathway (G6PDH), protein metabolism (AST and ALT), phosphate metabolism (ACP and ALP) and energy metabolism (ATPase), and HSP70 levels in various tissues. Acclimation to higher temperatures (33 and 36°C) significantly increased activities of LDH, MDH, ALP, ACP, AST, ALT and ATPase and blood glucose levels, whereas decreased the G6PDH enzyme activity and, tissue glycogen and ascorbic acid. Results indicated an overall increase in the carbohydrate, protein and lipid metabolism implying increased metabolic demands for maintaining homeostasis in fish acclimated to higher temperatures (33 and 36°C). We observed tissue specific response of HSP70 in H. brachysoma, with significant increase in gill and liver at 33 and 36°C, and in brain and muscle at 36°C, enabling cellular protection at higher acclimation temperatures. In conclusion, H. brachysoma adjusted metabolic and cellular responses to withstand increased temperatures, however, these responses suggest that the fish was under stress at 33°C or higher temperature.
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Date 2018-11-05T11:09:07Z
2018-11-05T11:09:07Z
2017-01-01
 
Type Research Paper
 
Identifier Dalvi RS, Das T, Debnath D, Yengkokpam S, Baruah K, Tiwari LR, Pal AK (2017). Metabolic and cellular stress responses of catfish, Horabagrus brachysoma (Günther, 1864) acclimated to increasing temperatures. Journal of Thermal Biology, 65: 32-40.
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http://krishi.icar.gov.in/jspui/handle/123456789/9408
 
Language English
 
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