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Current Alzheimer Research
ISSN (Print): 1567-2050
ISSN (Online): 1875-5828
VOLUME: 9
ISSUE: 4
DOI: 10.2174/156720512800492459









Optimized Turmeric Extract Reduces β-Amyloid and Phosphorylated Tau Protein Burden in Alzheimer’s Transgenic Mice

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Author(s): R. Douglas Shytle, Jun Tan, Paula C. Bickford, Kavon Rezai-zadeh, L Hou, Jin Zeng, Paul R. Sanberg, Cyndy D. Sanberg, Randall S. Alberte, Ryan C. Fink and Bill Roschek Jr
Pages 500-506 (7)
Abstract:
In a previous in vitro study, the standardized turmeric extract, HSS-888, showed strong inhibition of Aβ aggregation and secretion in vitro, indicating that HSS-888 might be therapeutically important. Therefore, in the present study, HSS-888 was evaluated in vivo using transgenic ‘Alzheimer’ mice (Tg2576) over-expressing Aβ protein. Following a six-month prevention period where mice received extract HSS-888 (5mg/mouse/day), tetrahydrocurcumin (THC) or a control through ingestion of customized animal feed pellets (0.1% w/w treatment), HSS-888 significantly reduced brain levels of soluble (∼40%) and insoluble (∼20%) Aβ as well as phosphorylated Tau protein (∼80%). In addition, primary cultures of microglia from these mice showed increased expression of the cytokines IL-4 and IL-2. In contrast, THC treatment only weakly reduced phosphorylated Tau protein and failed to significantly alter plaque burden and cytokine expression. The findings reveal that the optimized turmeric extract HSS-888 represents an important step in botanical based therapies for Alzheimer’s disease by inhibiting or improving plaque burden, Tau phosphorylation, and microglial inflammation leading to neuronal toxicity.
Keywords:
Alzheimer’s disease, Tau phosphorylation, turmeric, curcuminoids, Aß cascade hypothesis, chronic inflammation
Affiliation:
HerbalScience Group LLC., Naples, FL 34110, USA.