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- W2016228218 abstract "While basal forebrain cholinergic neurons degenerate in aging and Alzheimer's disease, the cholinergic groups of the upper brainstem are preserved. Since the brainstem reticular-like cholinergic neurons differ from the rostral cholinergic phenotype by their high expression of nitric oxide synthase (NOS) mRNA, we hypothesized that they contain biochemical mechanisms to protect themselves against self-induced damage by nitric oxide (NO). Our initial question was a source of the NO during the aging process. We found a significant correlation between cognitive function and markers for glial activation and oxidative stress using aged rats. This result indicates that oxidative stress accompanied by glial activation may be occurred in the cognitively impaired animals. We also found mitochondrial DNA (mDNA) was significantly damaged in these animals, while accumulation of oxidative damage was not evident in other molecules. Therefore, oxidative damage to the mDNA by glial activation may occur in the cells having poor protection against oxidative stress during aging. Then the dysfunction of mitochondria, induced by the mDNA damage, may induce cell death as well as produce another oxidative stress to cause neuronal damage. The damaged neurons induce further glial activation and such self-accelerated immune-like response results in progressive neurodegeneration." @default.
- W2016228218 created "2016-06-24" @default.
- W2016228218 creator A5051302366 @default.
- W2016228218 date "2001-01-01" @default.
- W2016228218 modified "2023-09-27" @default.
- W2016228218 title "Glial activation and brain aging." @default.
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- W2016228218 doi "https://doi.org/10.1254/fpj.118.251" @default.
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