Scavenging effects of Mallotus repandus on active oxygen species.
The active oxygen species scavenging potencies of Mallotus repandus (Willd.) Muell.-Arg. extracts were evaluated by the electron spin resonance (ESR) spin-trapping technique. Superoxide radical (O2.-) and hydroxyl radical (OH.) were supplied enzymatically from hypoxanthine-xanthine oxidase (HPX-XOD) reaction and hydrogen peroxide-ferrous sulfate (Fenton reaction), respectively, to the assay system. The ethyl acetate fraction of Mallotus repandus (stem) showed the greatest superoxide radical scavenger activity and the n-hexane fraction of Mallotus repandus (stem as well as root) the greatest hydroxyl radical scavenger activity.
Lin
J M
JM
Graduate Institute of Natural Products, Kaohsiung Medical College, Taiwan, R.O.C.
Lin
C C
CC
Chen
M F
MF
Ujiie
T
T
Takada
A
A
D000975:Antioxidants / Q000494:pharmacology*; D004578:Electron Spin Resonance Spectroscopy; D016166:Free Radical Scavengers / Q000378:metabolism*; D017665:Hydroxyl Radical; D008516:Medicine, Chinese Traditional; D008517:Phytotherapy; D010936:Plant Extracts / Q000494:pharmacology*; D017382:Reactive Oxygen Species / Q000378:metabolism*; D013481:Superoxides / Q000378:metabolism
D000975:Antioxidants; D016166:Free Radical Scavengers; D010936:Plant Extracts; D017382:Reactive Oxygen Species; D013481:Superoxides; D017665:Hydroxyl Radical