Detection of free radical scavenging activity of schisanhenol by electron spin resonance. 1990

T J Lin, and G T Liu, and X J Li, and B L Zhao, and W J Xin
Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing.

It was reported that Schisanhenol (Sal) isolated from Schisandrae Rubriflora inhibited lipid peroxidation induced by ferrous-cysteine and NADPH-ascorbic acid. In this studies the oxygen radical scavenging activity of Sal was detected by electron spin resonance (ESR) and spin trapping. Sal was shown to scavenge oxygen radicals produced by human neutrophils (Neu) stimulated by tetradecanoylphorbol acetate (TDPA). But no effect of Sal was seen on oxygen consumption measured by spin label oximetry in Neu during respiratory burst. In Fenton reaction system, the inhibitory rate of hydroxyl radical by Sal was 34.4%. In xanthine-xanthine oxidase and uv-irradiation of riboflavin systems, Sal scavenged superoxide anion radical by 26.1% and 21.9%, respectively. In all these systems the action of Sal was more potent than that of vitamin E. It may be concluded that Sal possesses a free radical-scavenging activity.

UI MeSH Term Description Entries
D009504 Neutrophils Granular leukocytes having a nucleus with three to five lobes connected by slender threads of chromatin, and cytoplasm containing fine inconspicuous granules and stainable by neutral dyes. LE Cells,Leukocytes, Polymorphonuclear,Polymorphonuclear Leukocytes,Polymorphonuclear Neutrophils,Neutrophil Band Cells,Band Cell, Neutrophil,Cell, LE,LE Cell,Leukocyte, Polymorphonuclear,Neutrophil,Neutrophil Band Cell,Neutrophil, Polymorphonuclear,Polymorphonuclear Leukocyte,Polymorphonuclear Neutrophil
D010100 Oxygen An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration. Dioxygen,Oxygen-16,Oxygen 16
D011083 Polycyclic Compounds Compounds which contain two or more rings in their structure. Compounds, Polycyclic
D004578 Electron Spin Resonance Spectroscopy A technique applicable to the wide variety of substances which exhibit paramagnetism because of the magnetic moments of unpaired electrons. The spectra are useful for detection and identification, for determination of electron structure, for study of interactions between molecules, and for measurement of nuclear spins and moments. (From McGraw-Hill Encyclopedia of Science and Technology, 7th edition) Electron nuclear double resonance (ENDOR) spectroscopy is a variant of the technique which can give enhanced resolution. Electron spin resonance analysis can now be used in vivo, including imaging applications such as MAGNETIC RESONANCE IMAGING. ENDOR,Electron Nuclear Double Resonance,Electron Paramagnetic Resonance,Paramagnetic Resonance,Electron Spin Resonance,Paramagnetic Resonance, Electron,Resonance, Electron Paramagnetic,Resonance, Electron Spin,Resonance, Paramagnetic
D005609 Free Radicals Highly reactive molecules with an unsatisfied electron valence pair. Free radicals are produced in both normal and pathological processes. Free radicals include reactive oxygen and nitrogen species (RONS). They are proven or suspected agents of tissue damage in a wide variety of circumstances including radiation, damage from environment chemicals, and aging. Natural and pharmacological prevention of free radical damage is being actively investigated. Free Radical
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D016166 Free Radical Scavengers Substances that eliminate free radicals. Among other effects, they protect PANCREATIC ISLETS against damage by CYTOKINES and prevent myocardial and pulmonary REPERFUSION INJURY. Free Radical Scavenger,Radical Scavenger, Free,Scavenger, Free Radical,Scavengers, Free Radical
D017705 Lignans A class of dibenzylbutane derivatives which occurs in higher plants and in fluids (bile, serum, urine, etc.) in man and other animals. These compounds, which have a potential anti-cancer role, can be synthesized in vitro by human fecal flora. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed) Lignan,Neolignan,Neolignans
D034242 Cyclooctanes A group of compounds with an 8-carbon ring. They may be saturated or unsaturated. Benzocyclooctanes,Benzocyclooctenes,Cyclooctenes,Cyclooctodienes,Dibenzocyclooctanes

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