Abstract
Beta-Cyfluthrin is a widely used pesticide belonging to class of synthetic pyrethroids which affects the central and peripheral nervous systems. The current study investigates the impact of beta-Cyfluthrin on the biochemical parameters of liver of zebrafish (Danio sp.). Adult zebrafish were exposed to concentrations of 0.25, 0.5, 1.0, 2.0 and 4.0 µg/L of beta-Cyfluthrin for acute (96 hours) and chronic (21 days) exposure periods respectively (n=20). It was observed that exposure to beta-Cyfluthrin led to variations in biochemical markers in both acute and chronic exposure groups. Liver function tests revealed significant elevated activity of alanine transaminase (ALT) and aspartate transaminase (AST) at exposure concentrations of 2.0 and 4.0 µg/L of beta-Cyfluthrin in both acute and chronic groups, while acid phosphatase (ACP) and alkaline phosphatase (ALP) activity decreased significantly at concentrations of 1.0, 2.0 and 4.0 µg/L in the chronic group. Lipid peroxidation exhibited a concentration and time-dependent increase with significant difference at 1.0, 2.0 and 4.0 µg/L in both acute and chronic groups, while superoxide dismutase (SOD) and peroxidase (PER) levels declined significantly in both acute and chronic exposure groups at exposure concentrations of 1.0, 2.0 and 4.0 µg/L for SOD and 2.0 and 4.0 µg/L for PER. Catalase (CAT) initially increased significantly in acute groups of 1.0, 2.0 and 4.0 µg/L but decreased in chronic ones. Glutathione S-transferase (GST) levels exhibited a significant increase at lower concentrations of 0.25 µg/L but a decrease at higher concentrations, 1.0, 2.0 and 4.0 µg/L of beta-Cyfluthrin. The level of significance were considered at p<0.05 and p<0.01. This research suggests that exposure to beta-Cyfluthrin leads to hepatic damage in adult zebrafish. This indicates a potential risk to non-target aquatic fauna, through runoff where beta-Cyfluthrin is used as an agricultural pesticide.
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