Document Detail

Effect of quercetin and its glucuronide metabolite upon 6-hydorxydopamine-induced oxidative damage in Neuro-2a cells.
MedLine Citation:
PMID:  22404304     Owner:  NLM     Status:  Publisher    
Abstract Quercetin is ubiquitously distributed in plant foods. This antioxidative polyphenol is mostly converted to conjugated metabolites in the body. Parkinson disease (PD) has been suggested to be related to oxidative stress derived from abnormal dopaminergic activity. We evaluated if dietary quercetin contributes to the antioxidant network in the central nervous system from the viewpoint of PD prevention. A neurotoxin, 6-hydroxydopamine (6-OHDA), was used as a model of PD. 6-OHDA induced H(2)O(2) production and cell death in mouse neuroblastoma, Neuro-2a. Quercetin aglycone suppressed 6-OHDA induced H(2)O(2) production and cell death, although aglycone itself reduced cell viability at higher concentration. Quercetin 3-O-β-D-glucuronide (Q3GA), which is an antioxidative metabolite of dietary quercetin, was little incorporated into the cell resulting in neither suppression of 6-OHDA induced cell death nor reduction of cell viability. Q3GA was found to be deconjugated to quercetin by microglial MG-6 cells. These results indicate that quercetin metabolites should be converted to their aglycone to exert preventive effect on damage to neuronal cells.
Rie Mukai; Kyuichi Kawabata; Seiko Otsuka; Akari Ishisaka; Yoshichika Kawai; Zai-Si Ji; Hiroshi Tsuboi; Junji Terao
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-3-12
Journal Detail:
Title:  Free radical research     Volume:  -     ISSN:  1029-2470     ISO Abbreviation:  -     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-3-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9423872     Medline TA:  Free Radic Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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