REVIEW: Curcumin and Alzheimer's disease.
Curcumin has a long history of use as a traditional remedy and food in Asia. Many studies have reported that curcumin has various beneficial properties, such as antioxidant, antiinflammatory, and antitumor. Because of the reported effects of curcumin on tumors, many clinical trials have been performed to elucidate curcumin's effects on cancers. Recent reports have suggested therapeutic potential of curcumin in the pathophysiology of Alzheimer's disease (AD). In in vitro studies, curcumin has been reported to inhibit amyloid-β-protein (Aβ) aggregation, and Aβ-induced inflammation, as well as the activities of β-secretase and acetylcholinesterase. In in vivo studies, oral administration of curcumin has resulted in the inhibition of Aβ deposition, Aβ oligomerization, and tau phosphorylation in the brains of AD animal models, and improvements in behavioral impairment in animal models. These findings suggest that curcumin might be one of the most promising compounds for the development of AD therapies. At present, four clinical trials concerning the effects of curcumin on AD has been conducted. Two of them that were performed in China and USA have been reported no significant differences in changes in cognitive function between placebo and curcumin groups, and no results have been reported from two other clinical studies. Additional trials are necessary to determine the clinical usefulness of curcumin in the prevention and treatment of AD.
Hamaguchi
Tsuyoshi
T
Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Science, Japan.
Ono
Kenjiro
K
Yamada
Masahito
M
D000544:Alzheimer Disease / Q000188:drug therapy* / Q000378:metabolism; D053829:Amyloid Precursor Protein Secretases / Q000037:antagonists & inhibitors / Q000378:metabolism; D016229:Amyloid beta-Peptides / Q000378:metabolism; D000818:Animals; D002986:Clinical Trials as Topic; D003474:Curcumin / Q000737:chemistry / Q000627:therapeutic use*; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000627:therapeutic use*; D006801:Humans
D016229:Amyloid beta-Peptides; D004791:Enzyme Inhibitors; D053829:Amyloid Precursor Protein Secretases; D003474:Curcumin
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