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Zinc supplementation prevents liver injury in chlorpyrifos-treated rats

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Abstract

The present study was performed to investigate the protective effects of zinc (227 mg/L in drinking water) treatment in chlorpyrifos (13.5 mg/kg body weight, orally) induced hepatotoxicity in male rats. Animals received chlorpyrifos and/or zinc treatments for 8 wk. A 99mTc-mebrofenin clearance test was done to determine the biological half-life (T biol) of the radiopharmaceutical in liver for the determination of the hepatobiliary function of the animals. At the end of treatment periods, samples were collected for the measurement of zinc levels in serum and liver. Electron microscopic studies were performed to study hepatic ultrastructure following various treatments. When compared to normal controls, chlorpyrifos treatment resulted in reduced hepatic and serum zinc levels (p<0.01). The biological half-life (T biol) of 99mTc-mebrofenin in liver was increased (p<0.01) significantly in chlorpyrifos-treated animals, reflecting a poor excretion of the radiopharmaceutical from the liver. Simultaneous zinc supplementation retained the increased hepatic T biol values of 99mTc-mebrofenin within normal limits. Zinc treatment also protected hepatocytes from the marked disruptions in the membranous organelles and narrowing/blocking of biliary channels, which was otherwise a common observation following chlorpyrifos treatment. These data clearly show the protective effects of zinc in animals subjected to organophosphate poisoning.

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Authors and Affiliations

  1. Department of Biophysics, Panjab University, 160014, Chandigarh, India

    Ajay Goel & Devinder K. Dhawan

  2. Department of Medicine and Cancer Center, University of California San Diego, 92093, La Jolla, CA

    Ajay Goel

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Goel, A., Dhawan, D.K. Zinc supplementation prevents liver injury in chlorpyrifos-treated rats. Biol Trace Elem Res 82, 185–200 (2001). https://doi.org/10.1385/BTER:82:1-3:185

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  • DOI: https://doi.org/10.1385/BTER:82:1-3:185

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