Role of oxidative stress and nitric oxide in the protective effects of a-lipoic acid and aminoguanidine against isoniazid-rifampicin-induced hepatotoxicity in rats

Despite the great efficacy of isoniazid (INH) and rifampicin (RIF) combination, in the treatment of tuberculosis, hepatotoxicity is the most common serious complication. The potential protective effect of a-lipoic acid and aminoguanidine; against combination-induced hepatotoxicity was investigated i...

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Bibliographic Details
Published in:Food and chemical toxicology 2010-07, Vol.48 (7), p.1869-1875
Main Authors: Saad, Evan I, El-Gowilly, Sahar M, Sherhaa, Mabrouka O, Bistawroos, Azza E
Format: Article
Language:English
Subjects:
Catalase
Enzymes
Glutathione
Lipids
Liver
Markers
Mycobacterium
Protective
Rats
Superoxide dismutase
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Summary:Despite the great efficacy of isoniazid (INH) and rifampicin (RIF) combination, in the treatment of tuberculosis, hepatotoxicity is the most common serious complication. The potential protective effect of a-lipoic acid and aminoguanidine; against combination-induced hepatotoxicity was investigated in the present study. Administration of INH-RIF combination (50mg/kg each for 14days) resulted in an elevation of serum hepatic marker enzymes and a significant increase in lipid profile parameters. Combinations treatment increased lipid peroxidation products, decreased glutathione content, superoxide dismutase, catalase and myeloperoxidase activities. Furthermore, liver total nitrite level was significantly increased in INH-RIF treated rats. Co-administration of either a-lipoic acid or aminoguanidine significantly ameliorate combination-induced alterations in hepatic marker enzymes. These effects were directly linked to a greater decrease in the combination-induced elevation in lipid peroxidation products and total nitrite levels. Furthermore, co-administration of a-lipoic acid and aminoguanidine restore superoxide dismutase, catalase and myeloperoxidase activities and maintained the imbalance in the glutathione level. Additionally, such beneficial effect of a-lipoic acid was linked to a marked lipid-lowering effect. Histopathological examination revealed preservation of liver integrity of the protected groups compared to combination-treated rats alone.
ISSN:0278-6915
DOI:10.1016/j.fct.2010.04.026