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Abstract Title:

Toxic effects of imidacloprid combined with arsenic: Oxidative stress in rat liver.

Abstract Source:

Toxicol Ind Health. 2018 Oct ;34(10):726-735. Epub 2018 Jul 22. PMID: 30033815

Abstract Author(s):

Lakshay Mahajan, Pawan Kumar Verma, Rajinder Raina, Shilpa Sood

Article Affiliation:

Lakshay Mahajan

Abstract:

Imidacloprid (IMI), a newer neonicotinoid insecticide, induces oxidative insult to hepatocytes due to the formation of reactive metabolites during hepatic metabolism. The present study aimed to determine the potentiating effect of arsenic (As) on IMI-induced hepatic damage in Wistar rats. Rats, randomly divided into eight groups with six in each, were subjected to daily oral administration for 28 days. Group I served as control; group II received IMI at the dose rate of 16.9 mg/kg body weight; groups III, IV, and V received As at the dose rate of 50, 100, and 150 ppb, respectively, in drinking water; groups VI, VII, and VIII received both IMI (16.9 mg/kg) and As in drinking water at the rate of 50, 100, and 150 ppb, respectively. Repeated oral administration of IMI or As resulted in significant ( p<0.05) elevation of plasma phosphatases, transferases, hepatic malondialdehyde, and advanced oxidation protein product levels, but significantly ( p<0.05) decreased levels of total proteins, thiols, and activities of antioxidant enzymes that indicate oxidation-induced hepatotoxicity. These findings were further corroborated by histological alterations in hepatic tissue of IMI or As-administered rats. The coadministration of both IMI and As in rats produced more severe alterations in these parameters in hepatic tissue. Reduced antioxidant indices and increased hepatic damage biomarkers with pronounced histopathological alterations in hepatic tissue after combined exposure to toxicants indicate potentiating toxic effect of As on IMI-induced hepatotoxicity.

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