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Kostylev, Mikhail A.; Kaufman, Adam C.; Nygaard, Haakon B.; Patel, Pujan; Haas, Laura T.; Gunther, Erik C.; Vortmeyer, Alexander; Strittmatter, Stephen M.
The Journal of biological chemistry, 07/2015, Letnik: 290, Številka: 28Journal Article
Alzheimer disease (AD) is characterized by amyloid-β accumulation, with soluble oligomers (Aβo) being the most synaptotoxic. However, the multivalent and unstable nature of Aβo limits molecular characterization and hinders research reproducibility. Here, we characterized multiple Aβo forms throughout the life span of various AD mice and in post-mortem human brain. Aβo exists in several populations, where prion protein (PrPC)-interacting Aβo is a high molecular weight Aβ assembly present in multiple mice and humans with AD. Levels of PrPC-interacting Aβo match closely with mouse memory and are equal or superior to other Aβ measures in predicting behavioral impairment. However, Aβo metrics vary considerably between mouse strains. Deleting PrPC expression in mice with relatively low PrPC-interacting Aβo (Tg2576) results in partial rescue of cognitive performance as opposed to complete recovery in animals with a high percentage of PrPC-interacting Aβo (APP/PSEN1). These findings highlight the relative contributions and interplay of Aβo forms in AD. Background: Amyloid-β (Aβ) oligomers are key in Alzheimer disease (AD) but are diverse and poorly characterized. Results: Multiple Aβ forms were measured across the life span of AD model mice and human AD brain. Conclusion: Aβ species interacting with prion protein were tightly linked to behavioral impairment. Significance: An Aβ oligomer subset with defined biochemical properties is present in multiple AD-relevant samples.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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