THE EFFECTS OF L-ASCORBIC ACID ON ISONIAZID-INDUCED PROTEIN OXIDATION AND HEPATOTOXICITY IN RATS

Year 2024, , 1 - 7, 07.02.2024

Habibe Genç , Şeyma Dümür , Yakup Ergül , Yusuf Elgörmüş , Hafize Uzun

https://doi.org/10.54270/atljm.2023.46

Abstract

Isoniazid (INH) is hepatotoxic drug. Oxidative stress has been reported as one of the mechanisms of INH induced hepatotoxicity. In the current study, our aim was to evaluate the redox status of plasma and liver proteins as well as the protective role and dose of ascorbic acid (AA) in INH-induced hepatotoxicity in rats. Protein oxidation parameters such as protein carbonyl (PCO), total thiol (T-SH) levels and paraoxonase-1 (PON-1) activity was determined in the liver and the plasma of rats. Rats under study were randomly divided into four groups: (1) control; (2) INH (50mg/kg/day); (3) INH (50mg/kg/day) + AA (100 mg/kg/day); and (4) INH + AA (1000 mg/kg/day). INH administration resulted in abnormal elevation of plasma and hepatic PCO levels. On the other hand, the levels of the plasma and hepatic T-SH and PON1 activity significantly decreased. Supplementation of AA (100 mg/kg/day) dose partially reverted these abnormalities in the redox status of the proteins and activities of PON1 after the administration of INH. Changes in oxidative stress are likely involved in the pathogenesis of INH-induced hepatoxicity in rats.

Keywords

Askorbik asit, İzoniazid, Paraoksonaz, Protein karbonil, Total tiyol, Protein oksidasyonu

THE EFFECTS OF L-ASCORBIC ACID ON ISONIAZID-INDUCED PROTEIN OXIDATION AND HEPATOTOXICITY IN RATS

Abstract

İzoniazid (INH) hepatotoksik bir ilaçtır. Oksidatif stres, INH kaynaklı hepatotoksisitenin mekanizmalarından biri olarak rapor edilmiştir. Çalışmada amacımız, sıçanlarda INH kaynaklı hepatotoksisitede askorbik asid (AA)'in koruyucu rolü ve dozunun yanı sıra plazma ve karaciğer proteinlerinin redoks durumunu değerlendirmekti. Sıçanların karaciğer ve plazmalarında protein karbonil (PCO), total tiol (T-SH) seviyeleri ve paraoksonaz-1 (PON-1) aktivitesi gibi protein oksidasyon parametreleri belirlendi. Sıçanlar rastgele dört gruba ayrıldı: (1) kontrol; (2) INH (50mg/kg/gün); (3) INH (50mg/kg/gün) + AA (100 mg/kg/gün); ve (4) INH + AA (1000 mg/kg/gün). INH uygulaması, plazma ve hepatik PCO düzeylerinde anormal yükselme ile sonuçlanmıştır. Aynı zamanda, plazma ve hepatik T-SH seviyeleri ve PON1 aktivitesi önemli ölçüde azaldı. AA (100 mg/kg/gün) dozu takviyesi, proteinlerin redoks durumundaki ve INH uygulamasından sonra PON1 aktivitelerindeki bu anormallikleri kısmen geri döndürdü. Oksidatif stresteki değişiklikler muhtemelen sıçanlarda INH kaynaklı hepatoksisitenin patogenezinde yer almaktadır.

Keywords

Askorbik asit, İzoniazid, Paraoksonaz, Protein karbonil, Total tiyol, Protein oksidasyonu

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