title: Free radical scavenging, antitumor and anticarcinogenic activity of gossypin.
abstract: Antioxidant, antitumor and anticarcinogenic activity of gossypin (3,5,8,3',4'-pentahydroxy-7-O glucosyl flavone) was carried out. The compound needed for 50% inhibition of superoxide, hydroxyl and nitric oxide radicals was 3 microg/ml, 41 microg/ml and 12 microg/ml, respectively. Gossypin also impart 50% inhibition at concentrations 37 microg/ml and 43 microg/ml, respectively for in vitro lipid peroxidation. The compound shows IC50 of 30 microM, 42.5 microM and 45.1 microM concentrations in L 929, HT 29 and K 562 cell lines in 72 hrs MTT assay. The compound shows a zone of inhibition of 8 mm in topo I and topo II inhibition assay in Saccharomyces ceriviseae mutant cultures. It reduces the tumor burden in solid tumor harboring animals (p < 0.001) and effectively inhibits the formation of new blood vessels on tumor mass. 20 mg/kg b.wt of gossypin increase the life span of ascites tumor harboring animals (100%) and (164.7%) respectively by oral and intraperitoneal administration of the drug. Gossypin reduced the incidence of papilloma formation and papilloma/mouse in DMBA/ croton oil induced skin papilloma.
authors.affiliation: Amala Cancer Research Centre, Amala Nagar, Thrissur, India.
authors.forename: B H
authors.initials: BH
authors.lastname: Babu
authors.forename: H N
authors.initials: HN
authors.lastname: Jayram
authors.forename: M G
authors.initials: MG
authors.lastname: Nair
authors.forename: K B
authors.initials: KB
authors.lastname: Ajaikumar
authors.forename: J
authors.initials: J
authors.lastname: Padikkala
mesh_terms: D000818:Animals; D016588:Anticarcinogenic Agents / Q000737:chemistry / Q000494:pharmacology / Q000627:therapeutic use*; D000970:Antineoplastic Agents / Q000737:chemistry / Q000494:pharmacology / Q000627:therapeutic use*; D000975:Antioxidants / Q000737:chemistry / Q000494:pharmacology / Q000627:therapeutic use*; D045744:Cell Line, Tumor; D005419:Flavonoids / Q000737:chemistry / Q000494:pharmacology / Q000627:therapeutic use*; D016166:Free Radical Scavengers / Q000737:chemistry / Q000494:pharmacology / Q000627:therapeutic use*; D005609:Free Radicals / Q000378:metabolism*; D006801:Humans; D020128:Inhibitory Concentration 50; D051379:Mice; D010212:Papilloma / Q000098:blood supply / Q000139:chemically induced / Q000188:drug therapy / Q000473:pathology; D051381:Rats; D015996:Survival Rate
chemical_list: D016588:Anticarcinogenic Agents; D000970:Antineoplastic Agents; D000975:Antioxidants; D005419:Flavonoids; D016166:Free Radical Scavengers; D005609:Free Radicals; C022944:gossypin