title: Prevention of oxidative injury in PC12 cells by a traditional Chinese medicine, Shengmai San, as a model of an antioxidant-based composite formula.
abstract: The protective effect of Shengmai San (SMS) on oxidative damage in cultured PC12 cells was studied as a model of an antioxidant-based composite formula usable for the treatment of oxidative stress-related complex disorders. SMS, a traditional Chinese herbal medicine, has previously been shown to prevent cerebral oxidative injury in rats. Neuronal model PC12 cells were incubated with SMS for defined periods, chased with H(2)O(2) for 30 min at 37 degrees C, and subjected to an ELISA-based assay for determining the protein carbonyl content, and a Comet assay for DNA single strand breaks (SSBs). The results showed that both protein carbonyl content and DNA SSBs increased in PC12 cells after the H(2)O(2) chase in a concentration-dependent manner. Both H(2)O(2)-dependent carbonyl formation and DNA damage were markedly prevented in the cells pretreated with SMS, and the SMS effects were dependent on both the SMS concentration and the period of pre-incubation with SMS before the H(2)O(2) abuse. At the same time, cell viability was enhanced in the SMS-pretreated cells after the H(2)O(2) abuse compared to the control cells as determined by an 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. It is concluded that SMS functions not only as a simple antioxidant but also as a modulator of cellular antioxidant defense.
authors.affiliation: College of Traditional Chinese Medicine & Pharmacology, Capital University of Medical Sciences, Beijing, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Nishida
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Ogawa
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Konishi
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D002470:Cell Survival / Q000187:drug effects / Q000502:physiology; D002626:Chemistry, Pharmaceutical; D004249:DNA Damage / Q000187:drug effects / Q000502:physiology; D004305:Dose-Response Relationship, Drug; D004338:Drug Combinations; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D006861:Hydrogen Peroxide / Q000633:toxicity; D008516:Medicine, Chinese Traditional / Q000379:methods; D018384:Oxidative Stress / Q000187:drug effects* / Q000502:physiology; D016716:PC12 Cells; D051381:Rats
chemical_list: D000975:Antioxidants; D004338:Drug Combinations; D004365:Drugs, Chinese Herbal; C009252:fructus schizandrae, radix ginseng, radix ophiopogonis drug combination; D006861:Hydrogen Peroxide