title: Antioxidant and prophylactic effects of Delonix elata L., stem bark extracts, and flavonoid isolated quercetin against carbon tetrachloride-induced hepatotoxicity in rats.
abstract: Delonix elata L. (Ceasalpinaceae), is widely used by the traditional medical practitioners of Karnataka, India, to cure jaundice, and bronchial and rheumatic problems. The objective of this study was to screen the in vitro antioxidant and hepatoprotective activity of the stem bark extracts against CCl4-induced liver damage in rats. Among different stem bark extracts tested, the ethanol extract (DSE) has shown significant in vitro antioxidant property in radicals scavenging, metal chelating, and lipid peroxidation inhibition assays. HPLC analysis of the DSE revealed the presence of known antioxidant molecules, namely, gallic acid, ellagic acid, coumaric acid, quercetin, and rutin. Bioassay-guided fractionation of DSE has resulted in the isolation and characterization of quercetin. DSE and quercetin have shown significant prophylactic effects by restoring the liver function markers (AST, ALT, ALP, serum bilirubin, and total protein) and antioxidant enzymes (SOD, CAT, GPx, and GST). These results were proved to be hepatoprotective at par with silymarin and well supported by the histological observations of liver sections with distinct hepatic cells, and mild degree of fatty change and necrosis. The results indicated that the DSE and quercetin were significant for prophylactic activity against CCl4-induced liver damage in rats. This activity could be attributed to the antioxidant constituents in the DSE and hence justified the ethnomedicinal claims.
authors.affiliation: Department of Post Graduate Studies and Research in Biotechnology, Kuvempu University, Shankaraghatta, Karnataka 577 451, India.
authors.forename: Pradeepa
authors.identifier: 0000-0002-8178-7129
authors.initials: P
authors.lastname: Krishnappa
authors.affiliation: Department of Post Graduate Studies and Research in Biotechnology, Kuvempu University, Shankaraghatta, Karnataka 577 451, India.
authors.forename: Krishna
authors.initials: K
authors.lastname: Venkatarangaiah
authors.affiliation: Department of Post Graduate Studies and Research in Biotechnology, Kuvempu University, Shankaraghatta, Karnataka 577 451, India.
authors.lastname: Venkatesh
authors.affiliation: Department of Post Graduate Studies and Research in Biotechnology, Kuvempu University, Shankaraghatta, Karnataka 577 451, India.
authors.forename: Santosh Kumar
authors.initials: SK
authors.lastname: Shivamogga Rajanna
authors.affiliation: Department of Post Graduate Studies and Research in Biotechnology, Kuvempu University, Shankaraghatta, Karnataka 577 451, India.
authors.forename: Rajesh
authors.initials: R
authors.lastname: Kashi Prakash Gupta
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000737:chemistry / Q000494:pharmacology*; D015415:Biomarkers / Q000378:metabolism; D002252:Carbon Tetrachloride Poisoning / Q000378:metabolism / Q000473:pathology / Q000517:prevention & control; D056486:Chemical and Drug Induced Liver Injury / Q000378:metabolism / Q000473:pathology / Q000517:prevention & control; D007887:Fabaceae / Q000737:chemistry*; D008099:Liver / Q000378:metabolism / Q000473:pathology; D010088:Oxidoreductases / Q000378:metabolism; D024301:Plant Bark / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D018547:Plant Stems / Q000737:chemistry*; D011794:Quercetin / Q000737:chemistry / Q000494:pharmacology*; D051381:Rats; D017208:Rats, Wistar
chemical_list: D000975:Antioxidants; D015415:Biomarkers; D010936:Plant Extracts; D011794:Quercetin; D010088:Oxidoreductases