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- W1587774683 abstract "Abstract N‐terminally truncated amyloid‐β (Aβ) peptides are present in early and diffuse plaques of individuals with Alzheimer's disease (AD), are overproduced in early onset familial AD and their amount seems to be directly correlated to the severity and the progression of the disease in AD and Down's syndrome (DS). The pyroglutamate‐containing isoforms at position 3 [AβN3(pE)−40/42] represent the prominent form among the N‐truncated species, and may account for more than 50% of Aβ accumulated in plaques. In this study, we compared the toxic properties, fibrillogenic capabilities, and in vitro degradation profile of Aβ1–40, Aβ1–42, AβN3(pE)−40 and AβN3(pE)−42. Our data show that fibre morphology of Aβ peptides is greatly influenced by the C‐terminus while toxicity, interaction with cell membranes and degradation are influenced by the N‐terminus. AβN3(pE)−40 induced significantly more cell loss than the other species both in neuronal and glial cell cultures. Aggregated AβN3(pE) peptides were heavily distributed on plasma membrane and within the cytoplasm of treated cells. AβN3(pE)−40/42 peptides showed a significant resistance to degradation by cultured astrocytes, while full‐length peptides resulted partially degraded. These findings suggest that formation of N‐terminally modified peptides may enhance β‐amyloid aggregation and toxicity, likely worsening the onset and progression of the disease." @default.
- W1587774683 created "2016-06-24" @default.
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- W1587774683 date "2002-09-01" @default.
- W1587774683 modified "2023-10-13" @default.
- W1587774683 title "Pyroglutamate-modified amyloid β-peptides - AβN3(pE) - strongly affect cultured neuron and astrocyte survival" @default.
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- W1587774683 doi "https://doi.org/10.1046/j.1471-4159.2002.01107.x" @default.
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