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- W2068872788 abstract "Superoxide production via NADPH-oxidase (NOX) has been shown to play a role in a variety of neurological disorders, including Alzheimer disease (AD). To improve our understanding of the NOX system and cognitive impairment, we studied the various protein components of the phagocytic isoform (gp91phox, or NOX2) in the frontal and temporal cortex of age- and postmortem-matched samples. Individuals underwent antemortem cognitive testing and postmortem histopathologic assessment to determine disease progression and assignment to one of the following groups: no cognitive impairment (NCI), preclinical AD, mild cognitive impairment (MCI), early AD, and mild-to-moderate AD. Biochemical methods were used to determine overall NOX activity as well as levels of the various subunits (gp91phox, p67phox, p47phox, p40phox, and p22phox). Overall enzyme activity was significantly elevated in the MCI cohort in both cortical regions compared to the NCI cohort. This activity level remained elevated in the AD groups. Only the NOX cytosolic subunit proteins (p67phox, p47phox, and p40phox ) were significantly elevated with disease progression; the membrane-bound subunits (gp91phox and p22phox) remained stable. In addition, there was a robust correlation between NOX activity and the individual's cognitive status such that as the enzyme activity increased, cognitive performance decreased. Collectively, these data show that upregulated NADPH-oxidase in frontal and temporal cortex suggests that increases in NOX-associated redox pathways might participate in early pathogenesis and contribute to AD progression." @default.
- W2068872788 created "2016-06-24" @default.
- W2068872788 creator A5010724329 @default.
- W2068872788 creator A5036342375 @default.
- W2068872788 date "2011-07-01" @default.
- W2068872788 modified "2023-10-15" @default.
- W2068872788 title "NADPH-oxidase activation and cognition in Alzheimer disease progression" @default.
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- W2068872788 doi "https://doi.org/10.1016/j.freeradbiomed.2011.03.025" @default.
- W2068872788 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3109185" @default.
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