Intestinal microbiota and lipid metabolism responses in the common carp (Cyprinus carpio L.) following copper exposure

Ecotoxicology and Environmental Safety
Xiao-Lin MengGuo-Xing Nie

Abstract

The present study was conducted to determine the effects of waterborne copper exposure on the lipid metabolism and intestinal microbiota of juvenile common carp (Cyprinus carpio L.). Common carp were exposed to four waterborne copper (Cu) concentrations (0 (control), 0.07 (low), 0.14 (medium), and 0.28 (high) mg Cu/L) for 8 weeks. Exposure to a high concentration of Cu had a negative effect on growth indices (weight gain rate (WGR) and specific growth rate (SGR)). The biochemical indices measured in serum (low-density lipoprotein (LDL) and triglycerides (TGs)) were significantly affected by exposure to medium concentration levels of Cu. The mRNA levels of lipogenic enzymes (acetyl-CoA carboxylase 1 (ACC-1) and fatty acid synthase (FAS)) and sterol-regulator element-binding protein-1 (SREBP-1) in liver tissue and tight binding protein genes (ZO-1 and occludin) in intestinal epithelial tissue were significantly downregulated in the 0.14 and 0.28 mg/L Cu treatment groups, accompanied by upregulated mRNA levels of lipolysis enzymes (lipoprotein lipase (LPL) and carnitine palmitoyl transferase 1 (CPT-1)) in the liver. The data also showed that the composition of intestinal microbiota was changed following Cu exposure and could alter...Continue Reading

Citations

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