Journal
INTERNATIONAL JOURNAL OF IMMUNOPATHOLOGY AND PHARMACOLOGY
Volume 29, Issue 1, Pages 30-39Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/0394632015613039
Keywords
antioxidant; flavonoids; oxidative stress; Parkinson's disease
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There is increasing evidence that free radicals induced oxidative stress is a major causative agent in the pathogenesis of neurodegenerative diseases, particularly Parkinson's disease. Quercetin glycosides, namely rutin and isoquercitrin, are flavonoid polyphenol compounds found ubiquitously in fruits and vegetables and have been known to possess antioxidant effects. This study was designed to compare the neuroprotective effects of quercetin glycosides rutin and isoquercitrin in 6-OHDA-induced rat pheochromocytoma (PC-12) cells. The results showed that both rutin and isoquercitrin significantly increased antioxidant enzymes, catalase, superoxide dismutase, glutathione peroxidase, and glutathione level that were attenuated by 6-OHDA in PC-12 cells. There was no significant difference in the activation of glutathione and glutathione peroxidase enzymes between rutin and isoquercitrin. These two glycosides were equally effective in suppressing lipid peroxidation in 6-OHDA-induced PC-12 cells as both compounds suppressed the malondialdehyde generation and prevented cell damage. In conclusion, quercetin glycosides rutin and isoquercetrin are having a significant neuroprotective effect against 6-OHDA toxicity in PC-12 cells.
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