title: Comparative evaluation of different extracts of leaves of Psidium guajava Linn. for hepatoprotective activity.
abstract: The study was designed to evaluate the hepatoprotective activity of different extracts (petroleum ether, chloroform, ethyl acetate, methanol and aqueous) of P. guajava in acute experimental liver injury induced by carbon tetrachloride and paracetamol. The effects observed were compared with a known hepatoprotective agent, silymarin (100 mg/kg p.o.). In the acute liver damage induced by different hepatotoxins, P. guajava methanolic leaf extract (200 mg/kg, p.o.) significantly reduced the elevated serum levels of aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase and bilirubin in carbon tetrachloride and paracetamol induced hepatotoxicity. P. guajava ethyl acetate leaf extract (200 mg/kg, p.o.) significantly reduced the elevated serum levels of aspartate aminotransferase, alanine aminotransferase and bilirubin in carbon tetrachloride induced hepatotoxicity whereas P. guajava aqueous leaf extract (200 mg/kg, p.o.) significantly reduced the elevated serum levels of alkaline phosphatase, alanine aminotransferase and bilirubin in carbon tetrachloride induced hepatotoxicity. P. guajava ethyl acetate and aqueous leaf extracts (200 mg/kg, p.o.) significantly reduced the elevated serum levels of aspartate aminotransferase in paracetamol induced hepatotoxicity. Histological examination of the liver tissues supported the hepatoprotection. It is concluded that the methanolic extract of leaves of Psidium guajava plant possesses better hepatoprotective activity compared to other extracts.
authors.affiliation: Krupanidhi College of Pharmacy, Chikka Bellundur, Vartur Hobli Post, Bangalore-560 035, India.
authors.forename: Chanchal K
authors.initials: CK
authors.lastname: Roy
authors.forename: Amit Kumar
authors.initials: AK
authors.lastname: Das
mesh_terms: D000082:Acetaminophen; D000410:Alanine Transaminase / Q000097:blood; D000469:Alkaline Phosphatase / Q000097:blood; D000818:Animals; D001219:Aspartate Aminotransferases / Q000097:blood; D001663:Bilirubin / Q000097:blood; D002251:Carbon Tetrachloride; D056486:Chemical and Drug Induced Liver Injury / Q000097:blood / Q000188:drug therapy* / Q000473:pathology; D004195:Disease Models, Animal; D004353:Drug Evaluation, Preclinical; D005260:Female; D008099:Liver / Q000187:drug effects / Q000473:pathology; D008297:Male; D008517:Phytotherapy; D010936:Plant Extracts / Q000627:therapeutic use*; D018515:Plant Leaves / Q000737:chemistry*; D031647:Psidium / Q000737:chemistry*; D051381:Rats; D017208:Rats, Wistar; D012838:Silymarin / Q000627:therapeutic use; D012997:Solvents
chemical_list: D010936:Plant Extracts; D012838:Silymarin; D012997:Solvents; D000082:Acetaminophen; D002251:Carbon Tetrachloride; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase; D000469:Alkaline Phosphatase; D001663:Bilirubin