Journal
FREE RADICAL RESEARCH
Volume 43, Issue 2, Pages 156-164Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10715760802644694
Keywords
Alzheimer's disease; amyloid-beta; antioxidant; R-alpha lipoic acid; transgenic mice
Categories
Funding
- National Institutes of Health
- Alzheimer's Association
- Philip Morris USA Inc.
- Philip Morris International.
- NATIONAL INSTITUTE ON AGING [R01AG026151] Funding Source: NIH RePORTER
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Oxidative modifications are a hallmark of oxidative imbalance in the brains of individuals with Alzheimer's, Parkinson's and prion diseases and their respective animal models. While the causes of oxidative stress are relatively well-documented, the effects of chronically reducing oxidative stress on cognition, pathology and biochemistry require further clarification. To address this, young and aged control and amyloid-beta protein precursor-over-expressing mice were fed a diet with added R-alpha lipoic acid for 10 months to determine the effect of chronic antioxidant administration on the cognition and neuropathology and biochemistry of the brain. Both wild type and transgenic mice treated with R-alpha lipoic acid displayed significant reductions in markers of oxidative modifications. On the other hand, R-alpha lipoic acid had little effect on Y-maze performance throughout the study and did not decrease end-point amyloid-beta load. These results suggest that, despite the clear role of oxidative stress in mediating amyloid pathology and cognitive decline in ageing and A beta PP-transgenic mice, long-term antioxidant therapy, at levels within tolerable nutritional guidelines and which reduce oxidative modifications, have limited benefit.
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