title: Antioxidant activity of Chinese ant extract preparations.
abstract: Chinese ant extract preparations (CAEP) are a Chinese traditional medicine which is mainly used as a health food or drink for the treatment of rheumatism, rheumatoid arthritis, chronic hepatitis, sexual hypofunction, and antiaging in China. The effects on free radicals were examined by electron spin resonance spectrometry using the spin trapping agent 5.5-dimethyl-1-pyrroline-1-oxide (DMPO). Superoxide radicals (3.35 x 10(15) spins/ml) were quenched 50% by the extract at 0.5 mg/ml. The CAEP extract at 0.7 mg/ml inhibited 50% of hydroxyl radicals (52.0 x 10(15) spins/ml) generated by the Fenton reaction. Against DPPH radical, the scavenging action of CAEP was observed at 1.8 mg/ml of the extract and 50% of the DPPH radicals (8.14 x 10(15) spins/ml) were quenched. In vitro tests showed that CAEP inhibited the production of thiobarbituric acid-reactive substances, an index of lipid peroxidation, in rat brain homogenate.
authors.affiliation: Institute of Traditional Chinese Medicine (TCM), Guangxi College of TCM, Nanning, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhao
authors.forename: X
authors.initials: X
authors.lastname: Wang
authors.forename: M
authors.initials: M
authors.lastname: Kawai
authors.forename: J
authors.initials: J
authors.lastname: Liu
authors.forename: M
authors.initials: M
authors.lastname: Liu
authors.forename: A
authors.initials: A
authors.lastname: Mori
mesh_terms: D000818:Animals; D001000:Ants / Q000737:chemistry*; D001921:Brain / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D016166:Free Radical Scavengers / Q000378:metabolism; D017665:Hydroxyl Radical / Q000378:metabolism; D015227:Lipid Peroxidation / Q000187:drug effects*; D008099:Liver / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D008297:Male; D008516:Medicine, Chinese Traditional; D051381:Rats; D017207:Rats, Sprague-Dawley; D013481:Superoxides / Q000378:metabolism; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism*; D014020:Tissue Extracts / Q000032:analysis* / Q000494:pharmacology*
chemical_list: D016166:Free Radical Scavengers; D017392:Thiobarbituric Acid Reactive Substances; D014020:Tissue Extracts; D013481:Superoxides; D017665:Hydroxyl Radical