Quercetin, not caffeine, is a major neuroprotective component in coffee

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• 作者：Moonhee Lee ; Edith G. McGeer ; Patrick L. McGeer ; ^{mcgeerpl@mail.ubc.ca" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Neurotoxicity ; TNFα ; IL-6 ; Alzheimer disease ; Parkinson disease ; Microglia ; Astrocytes
• 刊名：Neurobiology of Aging
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：46
• 期：Complete
• 页码：113-123
• 全文大小：2358 K

文摘

Epidemiologic studies indicate that coffee consumption reduces the risk of Parkinson's disease and Alzheimer's disease. To determine the factors involved, we examined the protective effects of coffee components. The test involved prevention of neurotoxicity to SH-SY5Y cells that was induced by lipopolysaccharide plus interferon-γ or interferon-γ released from activated microglia and astrocytes. We found that quercetin, flavones, chlorogenic acid, and caffeine protected SH-SY5Y cells from these toxins. They also reduced the release of tumor necrosis factor-α and interleukin-6 from the activated microglia and astrocytes and attenuated the activation of proteins from P38 mitogen-activated protein kinase (MAPK) and nuclear factor kappa light chain enhancer of activated B cells (NFκB). After exposure to toxin containing glial-stimulated conditioned medium, we also found that quercetin reduced oxidative/nitrative damage to DNA, as well as to the lipids and proteins of SH-SY5Y cells. There was a resultant increase in [GSH]_i in SH-SY5Y cells. The data indicate that quercetin is the major neuroprotective component in coffee against Parkinson's disease and Alzheimer's disease.