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Acute toxicity of copper sulphate on Catla catla larvae and its effect on expression of three commonly used housekeeping genes

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NATL INST SCIENCE COMMUNICATION-NISCAIR

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beta-actin; Catla catla; Copper sulphate; EF1 alpha; GAPDH; Housekeeping gene

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Pisces are commonly used to study the effects of metals, including copper on the environment. However, until now only scant information is available about the responses induced by waterborne copper during early life stages and housekeeping gene expression in fishes. In the present study, we evaluated acute toxicity of copper sulphate on larvae of Catla catla and also the stability of expression of three housekeeping genes, beta-actin (beta-actin), glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and elongation factor 1 alpha (EF1 alpha). The results have shown increased mortality of Carla catla larvae with the increased concentration of copper sulphate. The median lethal concentration (LC50) of copper sulphate at the end of 96 h exposure was 1.032 ppm. During the challenge test of copper sulphate, the minimal coefficient of variation (CV) and stability index were observed for GAPDH and maximum for beta-actin indicating minimum variation of GAPDH and maximum variation of beta-actin. With the results, it can be concluded that GAPDH is most stable during copper sulphate challenge test on Catla catla larvae, followed by EF1 alpha and beta-actin.

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