ArticleEnvironmental health perspectives2026
Mobilization of the Environmental Toxicant Chlorpyrifos during Weight Loss and Its Impact on Liver and Adipose Tissue Metabolism in Mice.
Article in Environmental health perspectives, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Exercise and dietary interventions in the regulation of hepatic mitophagy and liver recovery (Review).Biomedical reports · 2026Review
- Insulin resistance induced by pesticides is overcome by pancreatic islet adaptation in a mouse model of Parkinson's disease.Molecular metabolism · 2026Article
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16 authors.
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Abstract
backgroundFat-soluble toxicants, such as chlorpyrifos (CPF) can accumulate in adipose tissue and the liver. During weight loss, these compounds may be released into the circulation, but the metabolic consequences of this mobilization remain poorly understood.
objectivesThis study aimed to investigate the mobilization of CPF during weight loss and its effects on liver health and adipose tissue metabolism in mice.
methodsC57BL/6J mice were fed a high-fat diet (HFD) or a low-fat diet (LFD) and exposed to 2 mg/kg BW/day CPF by oral gavage. Weight loss was induced by β3-adrenergic stimulation (CL316243) or treadmill exercise for 4 or 10 weeks. CPF was quantified in serum and tissues using HPLC. Tissue histology, expression of genes related to CPF metabolism, liver injury markers, and metabolic protein levels were assessed.
resultsCPF-exposed LFD mice showed more severe liver fibrosis and adipose inflammation than did their HFD counterparts. While obese mice had lower adipose CPF concentrations, they showed higher hepatic accumulation. CPF-exposed weight loss mice had higher levels of CPF in adipose tissue, liver, and brain and higher expression of CPF metabolism-related genes, including Paraoxinase-1 and cytochrome P450 genes, and greater glucose intolerance compared to their counterparts without CPF administration. Molecular analyses revealed suppressed AMPK signaling and P62 accumulation, indicating mitophagy disruption in CPF-exposed mice after weight loss. These effects occurred even at human-relevant low doses (0.45 mg/kg of BW/day) and persisted across sexes. DISCUSSION: Weight loss mobilizes CPF and its metabolites from fat stores, leading to tissue accumulation and damage. Even low-dose exposure contributes to hepatic and metabolic disruption in mice, highlighting the potential risk of toxicant mobilization during fat reduction.
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