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• W2983063886 abstract "Short-chain chlorinated paraffins (SCCPs) used in various industrial applications have been listed as new POPs. Previous studies based on high-dose exposures indicate their hepatotoxicity. However, their mechanisms of toxicity or adverse outcome pathways and health risks remain largely unknown.This study aimed to evaluate metabolic consequences of chronic dietary exposure to SCCPs at low doses and reveal the molecular mechanisms underlying hepatotoxicity of SCCPs.A combination of transcriptomics and metabolomics, together with general pathophysiological tests were performed to assess the hepatic response of male rats exposed to SCCPs.Our results highlight two major modes of action: Inhibition of energy metabolism and activation of the peroxisome proliferator-activated receptor α (PPARα). Exposure to SCCPs suppressed oxidative phosphorylation, glycolysis, gluconeogenesis and turnover of ATP-ADP-AMP and thus results in deficiencies of amino acids and nucleotides in liver of the rat. Exposure to SCCPs affected expression levels of 13 genes downstream of PPARα that encode proteins associated with metabolism of fatty acids. As a result, peroxisomal and mitochondrial fatty acid β-oxidation, microsomal fatty acid ω-oxidation, and lipogenesis were accelerated.Results of this work strongly support the conclusion that low-dose exposure to SCCPs can result in adverse outcomes in the rat model. Significant SCCP-induced inhibition of energy metabolism occurs at environmentally relevant dosages, which suggests that SCCPs exhibit metabolic toxicity. Interactions of SCCPs with PPARα signaling pathway can explain the disruption of lipids and amino acids metabolism." @default.
• W2983063886 created "2019-11-22" @default.
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• W2983063886 date "2019-12-01" @default.
• W2983063886 modified "2023-10-15" @default.
• W2983063886 title "Integration of metabolomics and transcriptomics reveals short-chain chlorinated paraffin-induced hepatotoxicity in male Sprague-Dawley rat" @default.
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• W2983063886 doi "https://doi.org/10.1016/j.envint.2019.105231" @default.
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