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- W2109187744 abstract "Alzheimer's disease (AD) is associated with accumulations of amyloid-β (Aβ) peptides, oxidative damage, mitochondrial dysfunction, neurodegeneration, and dementia. The mitochondrial antioxidant manganese superoxide dismutase-2 (Sod2) might protect against these alterations. To test this hypothesis, we inactivated one Sod2 allele ( Sod2 +/− ) in human amyloid precursor protein (hAPP) transgenic mice, reducing Sod2 activity to ∼50% of that in Sod2 wild-type ( Sod2 +/+ ) mice. A reduction in Sod2 activity did not obviously impair mice without hAPP/Aβ expression. In hAPP mice, however, it accelerated the onset of behavioral alterations and of deficits in prepulse inhibition of acoustic startle, a measure of sensorimotor gating. In these mice, it also worsened hAPP/Aβ-dependent depletion of microtubule-associated protein 2, a marker of neuronal dendrites. Sod2 reduction decreased amyloid plaques in the brain parenchyma but promoted the development of cerebrovascular amyloidosis, gliosis, and plaque-independent neuritic dystrophy. Sod2 reduction also increased the DNA binding activity of the transcription factor nuclear factor κB. These results suggest that Sod2 protects the aging brain against hAPP/Aβ-induced impairments. Whereas reductions in Sod2 would be expected to trigger or exacerbate neuronal and vascular pathology in AD, increasing Sod2 activity might be of therapeutic benefit." @default.
- W2109187744 created "2016-06-24" @default.
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- W2109187744 date "2006-05-10" @default.
- W2109187744 modified "2023-10-10" @default.
- W2109187744 title "Reduction in Mitochondrial Superoxide Dismutase Modulates Alzheimer's Disease-Like Pathology and Accelerates the Onset of Behavioral Changes in Human Amyloid Precursor Protein Transgenic Mice" @default.
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