Premium
Free radical scavenging activity of fermented papaya preparation and its effect on lipid peroxide level and superoxide dismutase activity in iron‐induced epileptic foci of rats
Author(s) -
Imao Katsuki,
Wang H.,
Komatsu M.,
Hiramatsu M.
Publication year - 1998
Publication title -
iubmb life
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.132
H-Index - 113
eISSN - 1521-6551
pISSN - 1521-6543
DOI - 10.1080/15216549800202392
Subject(s) - chemistry , antioxidant , superoxide dismutase , radical , lipid peroxidation , food science , biochemistry , fermentation
Fermented papaya preparation is a natural health food that has been commercially sold in Japan for 2 years. It is made by yeast fermentation of Carica Papaya Linn. We examined the antioxidant action of the fermented papaya preparation on free radicals and lipid peroxidation. Free radicals have been related with aging and diseases, such as cancer, diabetes and especially in neurological disorders, for example, Parkinson's disease or Alzheimer's disease. A diet including variable antioxidant foods may therefore help to prevent these illnesses. The free radical scavenging activity of the fermented papaya preparation was examined using an electron spin resonance (ESR) spectrometer. Fermented papaya preparation (50mg/ml) scavenged 80% of hydroxyl radicals, (·OH) as spin adducts of spin trap, 5,5‐dimethyl‐l‐pyrroline‐N‐oxide (DMPO) (5.27×1015 spins/ml) generated by Fenton reagents. The value of IC50 was 12.5mg/ml. The oral administration of the fermented papaya preparation for 4 weeks decreased the elevated of lipid peroxide levels in the ipsilateral 30 min after injection of iron solution by iron into the left cortex of rats. The fermented papaya preparation also increased superoxide dismutase activity in the cortex and hippocampus of them. These results suggest that the fermented papaya preparation has antioxidant actions and that it may be prophylactic food against the age related and neurological diseases associated with free radicals.