title: Enzymatic and non-enzymatic antioxidants in selected Piper species.
abstract: Piper species, commonly used in diet and traditional medicine were assessed for their antioxidant potential. Catalase activity was predominated in Piper longum, followed by Piper cubeba, green pepper, Piper brachystachyum and Piper nigrum. P. nigrum was richest in glutathione peroxidase and glucose-6-phosphate dehydrogenase, green pepper was richest in peroxidase and vitamin C while vitamin E was more in P. longum and P. nigrum. P. brachystachyum and P. longum were rich sources of vitamin A. All the Piper species had GSH content of around 1 to 2 nM/g tissue. The antioxidant components of Piper species constitute a very efficient system in scavenging a wide variety of reactive oxygen species. Antioxidant potential of Piper species was further confirmed by their ability to curtail in vitro lipid peroxidation by around 30-50% with concomitant increase in GSH content.
authors.affiliation: Department of Biochemistry, PSG College of Arts and Science, Coimbatore 641 004, India.
authors.forename: J
authors.initials: J
authors.lastname: Karthikeyan
authors.forename: P
authors.initials: P
authors.lastname: Rani
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D001205:Ascorbic Acid / Q000378:metabolism; D004798:Enzymes / Q000378:metabolism*; D016166:Free Radical Scavengers / Q000378:metabolism; D005954:Glucosephosphate Dehydrogenase / Q000378:metabolism; D005978:Glutathione / Q000378:metabolism; D005979:Glutathione Peroxidase / Q000378:metabolism; D006041:Goats; D015227:Lipid Peroxidation; D008930:Mitochondria, Liver / Q000378:metabolism; D009195:Peroxidase / Q000378:metabolism; D031701:Piper / Q000145:classification / Q000378:metabolism*; D017382:Reactive Oxygen Species; D014801:Vitamin A / Q000378:metabolism; D014810:Vitamin E / Q000378:metabolism
chemical_list: D000975:Antioxidants; D004798:Enzymes; D016166:Free Radical Scavengers; D017382:Reactive Oxygen Species; D014801:Vitamin A; D014810:Vitamin E; D005954:Glucosephosphate Dehydrogenase; D009195:Peroxidase; D005979:Glutathione Peroxidase; D005978:Glutathione; D001205:Ascorbic Acid