Metabolic Disruptions in Zebrafish Induced by α-Cypermethrin: A Targeted Metabolomics Study

Area of Science:

• Environmental toxicology
• Aquatic ecotoxicology
• Metabolomics

Background:

• Pesticide use in agriculture poses ecological risks, especially to aquatic life.
• α-cypermethrin is widely used but its metabolic toxicity in non-target aquatic organisms is unclear.
• Understanding pesticide effects at the metabolic level is crucial for ecological risk assessment.

Purpose of the Study:

• To investigate the metabolic effects of α-cypermethrin in adult zebrafish using targeted metabolomics.
• To identify biochemical disruptions and potential mechanisms of toxicity.
• To evaluate metabolite-level biomarkers for environmental monitoring.

Main Methods:

• Determined acute toxicity to establish sublethal concentrations (0.15 and 1.5 µg/L).
• Exposed adult zebrafish for 48 hours in a flow-through system.
• Utilized GC-MS/MS for metabolite quantification and multivariate analysis (PCA, PLS-DA) for data interpretation.

Main Results:

• Identified 395 metabolites, revealing dose-dependent metabolic alterations.
• Disruptions observed in glycolysis, glycerolipid metabolism, amino acid turnover, and glutathione pathways.
• Glutamate depletion and reduced GABA and TCA cycle intermediates suggest oxidative stress.

Conclusions:

• α-cypermethrin causes significant metabolic disturbances in zebrafish, indicating potential oxidative stress.
• Metabolomics provides mechanistic insights into pesticide toxicity.
• Metabolite biomarkers can enhance environmental monitoring and pesticide regulation.