title: Evaluation of hepatoprotective activity of Cissus quadrangularis stem extract against isoniazid-induced liver damage in rats.
abstract: OBJECTIVE
  The study was designed to investigate the hepatoprotective activity of methanol extract of Cissus quadrangularis (CQ) against isoniazid-induced hepatotoxicity in rats.
  
  
  METHODS
  The successive petroleum ether (60-80°C) and methanol extracts of C. quadrangularis were used. Hepatic damage was induced in Wistar rats by administering isoniazid (54 mg/kg, p.o.) once daily for 30 days. Simultaneously, CQ (500 mg/kg p.o) was administered 1 h prior to the administration of isoniazid (54 mg/kg, p.o.) once daily for 30 days. Silymarin (50 mg/kg p.o) was used as a reference drug.
  
  
  RESULTS
  Elevated levels of aspartate transaminase, alanine transaminase, alkaline posphatase, and bilirubin following isoniazid administration were significantly lowered due to pretreatment with CQ. Isoniazid administration significantly increased lipid peroxidation (LPO) and decreased antioxidant activities such as reduced glutathione, superoxide dismutase, and catalase. Pretreatment of rats with CQ significantly decreased LPO and increased the antioxidant activities.
  
  
  CONCLUSIONS
  The results of this study indicated that the hepatoprotective effect of CQ might be attributed to its antioxidant property.
authors.affiliation: Department of Pharmacology, K.L.E. University's College of Pharmacy, Vidyanagar, Hubli 580 031, Karnataka, India.
authors.forename: A H M
authors.initials: AH
authors.lastname: Viswanatha Swamy
authors.forename: Rucha V
authors.initials: RV
authors.lastname: Kulkarni
authors.forename: A H M
authors.initials: AH
authors.lastname: Thippeswamy
authors.forename: B C
authors.initials: BC
authors.lastname: Koti
authors.forename: Aparna
authors.initials: A
authors.lastname: Gore