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Assessment of Hepatotoxicity of First-line Anti-tuberculosis Drugs on Wistar Rats

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Specialty Pharmacology
Date 2017 Nov 11
PMID 29124333
Citations 5
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Abstract

Adverse drug reactions are inevitable risk factors associated with use of modern medicines. First-line anti-tuberculosis drugs contribute to diverse pathological complications, and hepatotoxicity is one of them. This study investigated the effects of anti-TB drugs in combination (rifampicin [RIF] + isoniazid [INH] + pyrazinamide [PZA]) on Wistar rats. Rats were grouped as control group (saline), toxicant group that was given (30.85 mg/kg b.wt., INH + 61.7 mg/kg b.wt., RIF + 132.65 mg/kg b.wt. PZA in dosage extrapolated from dose that is used in human). Different anti-oxidant enzymes were measured in the liver along with histopathology, hematology, genotoxic effect on bone marrow chromosomes, and DNA fragmentation. In addition, gene and protein expression of CYP2E1, NR1I2, NAT, and CYP7A1 was measured by qPCR and western blot. After administration of anti-TB drugs to Wistar rats for 28 days, there was an increase in thiobarbituric acid reactive substances and a decrease in anti-oxidant enzymes. Marked changes in histopathology, hematology, DNA fragmentation, chromosomes, and in gene expression were observed. Results of the study proved increased hepatotoxicity due to combinational treatment of anti-TB drugs and also that CYP2E1, NR1I2, NAT, and CYP7A1 genes play a vital role in anti-TB drug-induced hepatotoxicity.

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