PMID- 19496975 OWN - NLM STAT- MEDLINE DCOM- 20100517 LR - 20161125 IS - 1442-200X (Electronic) IS - 1328-8067 (Linking) VI - 52 IP - 1 DP - 2010 Feb TI - Effect of vitamin C on oxidative liver injury due to isoniazid in rats. PG - 69-74 LID - 10.1111/j.1442-200X.2009.02891.x [doi] AB - BACKGROUND: The aim of the present study was to investigate the effect of different doses of vitamin C on oxidative liver injury due to isoniazid (INH) in rats. METHODS: Rats were divided into four subgroups, each containing 10 rats. Group 1 was the control group; group 2, INH 50 mg/kg per day; group 3, INH 50 mg/kg per day + low-dose vitamin C (100 mg/kg per day); group 4, INH 50 mg/kg per day + high-dose vitamin C (1000 mg/kg per day). INH and vitamin C were administered into their stomachs through an oral tube. After 21 days, measurements were made in both serum and homogenized liver tissues. The levels of glutathione (GSH), superoxide dismutase (SOD) and other biochemical variables were measured. Malondialdehyde (MDA), glutathione peroxidase (GSH-px) and vitamin C were measured using commercial kits. RESULTS: Aspartate amino transferase and alanine aminotransferase in group 2 were higher than those in groups 1, 3 and 4 (P < 0.008 for both). Serum and tissue levels of MDA in group 2 were higher than that in groups 1 and 3 (P < 0.008 for both). There was no difference in the SOD levels between the four groups (P= 0.095). Erythrocyte and tissue GSH in group 2 were higher than that in groups 1 and 3 (P < 0.008 for both). Interestingly, erythrocyte and tissue GSH in group 4 were lower than those in group 1 (P < 0.008 for both). Erythrocyte level of GSH-px in group 2 was higher than that in groups 1 and 3 (P < 0.008 for both). CONCLUSIONS: INH-induced liver injury is associated with oxidative stress, and co-administration of low-dose vitamin C may reduce this damage effectively in a rat model. The antioxidant effect of high-dose vitamin C does not seem more potent compared to the low dose. FAU - Ergul, Yakup AU - Ergul Y AD - Department of Pediatrics, Cerrahpasa Medical School, Istanbul University, Istanbul, Turkey. yakupergul77@hotmail.com FAU - Erkan, Tulay AU - Erkan T FAU - Uzun, Hafize AU - Uzun H FAU - Genc, Habibe AU - Genc H FAU - Altug, Tuncay AU - Altug T FAU - Erginoz, Ethem AU - Erginoz E LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20090601 PL - Australia TA - Pediatr Int JT - Pediatrics international : official journal of the Japan Pediatric Society JID - 100886002 RN - 0 (Antioxidants) RN - 0 (Antitubercular Agents) RN - 4Y8F71G49Q (Malondialdehyde) RN - EC 1.11.1.9 (Glutathione Peroxidase) RN - EC 1.15.1.1 (Superoxide Dismutase) RN - GAN16C9B8O (Glutathione) RN - PQ6CK8PD0R (Ascorbic Acid) RN - V83O1VOZ8L (Isoniazid) SB - IM MH - Animals MH - Antioxidants/*pharmacology MH - Antitubercular Agents/*toxicity MH - Ascorbic Acid/blood/*pharmacology MH - Chemical and Drug Induced Liver Injury/*physiopathology MH - Disease Models, Animal MH - Dose-Response Relationship, Drug MH - Glutathione/blood MH - Glutathione Peroxidase/blood MH - Isoniazid/*toxicity MH - Liver Function Tests MH - Male MH - Malondialdehyde/blood MH - Oxidative Stress/*drug effects/*physiology MH - Rats MH - Rats, Wistar MH - Superoxide Dismutase/blood EDAT- 2009/06/06 09:00 MHDA- 2010/05/18 06:00 CRDT- 2009/06/06 09:00 PHST- 2009/06/06 09:00 [entrez] PHST- 2009/06/06 09:00 [pubmed] PHST- 2010/05/18 06:00 [medline] AID - PED2891 [pii] AID - 10.1111/j.1442-200X.2009.02891.x [doi] PST - ppublish SO - Pediatr Int. 2010 Feb;52(1):69-74. doi: 10.1111/j.1442-200X.2009.02891.x. Epub 2009 Jun 1.