Protective effect of genistein pre-treatment on paraquat hepatotoxicity in rats
| Autor: | María Bucci-Muñoz, Mariana Semeniuk, María Laura Ruiz, Nadia Ciriaci, Marcelo G. Luquita, Aldo D. Mottino, Juan Pablo Rigalli, Viviana A. Catania, Lucila Inés Ceré, Stella M. Roma, Ariel D. Quiroga |
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| Rok vydání: | 2021 |
| Předmět: |
Male
Paraquat 0301 basic medicine Thiobarbituric acid Aspartate transaminase Genistein Pharmacology Protective Agents Toxicology 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Animals Bile Aspartate Aminotransferases Rats Wistar Glutathione Transferase Aldehydes biology Herbicides Alanine Transaminase Metabolism Malondialdehyde Glutathione Renal disorders Radboud Institute for Molecular Life Sciences [Radboudumc 11] 030104 developmental biology Glutathione S-transferase Liver chemistry Alanine transaminase 030220 oncology & carcinogenesis biology.protein Chemical and Drug Induced Liver Injury |
| Zdroj: | Toxicology and Applied Pharmacology, 426 |
| ISSN: | 0041-008X |
| Popis: | Contains fulltext : 245481.pdf (Publisher’s version ) (Closed access) Paraquat (PQ), an herbicide widely used in agriculture, is considered a highly toxic compound. In hepatocytes, P-glycoprotein (P-gp/Abcb1) is a canalicular transporter involved in PQ extrusion from the cell. Previously, we demonstrated that genistein (GNT) induces P-gp in rat liver. In this study, the protective role of GNT pretreatment towards hepatic damage in a model of acute intoxication with PQ in rats, was investigated. Wistar rats were randomized in 4 groups: Control, GNT (5 mg/kg/day sc, 4 days), PQ (50 mg/kg/day ip, last day) and GNT+ PQ. Hepatic lipoperoxidation (LPO) was evaluated by the thiobarbituric acid reactive substances method. Hepatic levels of 4-hydroxynonenal protein adducts (4-HNEp-add) and glutathione-S-transferase alpha (GSTα) protein expression were evaluated by Western blotting. Hepatic glutathione levels and plasma levels of alanine transaminase (ALT) and aspartate transaminase (AST) were also measured. Biliary excretion of PQ was studied in vivo and in isolated perfused liver. PQ was quantified by HPLC. PQ significantly increased AST and ALT activities, malondialdehyde and 4-HNEp-add levels, whereby pretreatment with GNT ameliorated this effect. PQ biliary excretion remained unchanged after treatments in both experimental models. Hepatic GSTα expression was augmented in GNT group. GNT pretreatment increased hepatic glutathione levels in PQ + GNT group. These results agree with the lower content of 4-HNEp-adds in GNT + PQ group respect to PQ group. Unexpectedly, increased activity of P-gp did not enhance PQ biliary excretion. Thus, GNT protective mechanism is likely through the induction of GSTα which results in increased 4-HNE metabolism before formation of protein adducts. |
| Databáze: | OpenAIRE |
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