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- W1413896671 abstract "We wish to understand the normal function of amyloid-beta peptides (Abeta) and to see if they destabilize neuronal calcium homeostasis [Mattson et al., J. Neurosci. 12 (1992), 376-389]. We observed that a physiological concentration (10 nM) of Abeta1-42 increased both glutamate and noradrenaline exocytosis from rat cortical nerve endings at least in part by activation of N-type Ca2+ channels. Abeta oligomers rather than monomers or fibrils probably are the most active form. Three alternatively-proposed effects of Abeta (reactive oxygen species formation, membrane perforation, and disruption of Ca2+ stores) also were tested by incubating nerve endings with a relatively high (by this study's standards) concentration of Abeta1-42(100 nM). None of the three proposed effects were detected during these incubations. These results support the hypothesis that persistent elevations of Abeta, which normally operates as a modulator of N-type voltage gated calcium channels, could increase internal nerve ending Ca2+ and excitatory neurotransmitter release to produce the early neurotoxic effects that eventually lead to Alzheimer's disease." @default.
- W1413896671 created "2016-06-24" @default.
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- W1413896671 date "2004-06-03" @default.
- W1413896671 modified "2023-10-16" @default.
- W1413896671 title "Incubation of nerve endings with a physiological concentration of Aβ1-42 activates CaV2.2(N-Type)-voltage operated calcium channels and acutely increases glutamate and noradrenaline release" @default.
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- W1413896671 doi "https://doi.org/10.3233/jad-2004-6305" @default.
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