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• W3157410501 endingPage "126766" @default.
• W3157410501 startingPage "126766" @default.
• W3157410501 abstract "Aβ1−42 is an amyloidogenic peptide found within senile plaques extracted from those who died with a diagnosis of Alzheimer’s disease. The potent neurotoxicity of this peptide is related to its propensity to form aggregated conformations in vivo, a process that is influenced by the species and concentration of metal ions present within the local environment. This study examines the impact of different metals upon the early aggregatory behaviour and size of Aβ1−42 under simulated physiological conditions. The size and aggregatory behaviour of Aβ1−42 in the presence and absence of metal ions was monitored during the initial 30 min of fibril formation in real-time using dynamic light scattering. Intensity scattering measurements showed a clear tendency towards aggregation with regards to Aβ1−42 only solutions (10 μM). Both equimolar Al3+ & Cu2+ lowered and stabilised the dimensions of Aβ1−42 aggregates; however, a diminutive but significant increase in size was still observed over a 30-min period. While excess Al3+ continued to supress the size of Aβ1−42, a 10-fold increase in the concentration of Cu2+ accelerated peptide aggregation relative to that observed for equimolar metal but not compared to Aβ1−42 alone. These results infer that Al3+ ions stabilise and aid in the maintenance of smaller, toxic intermediates while excess Cu2+ facilitates the formation of larger, more inert, amorphous species exceeding 1 μm in size. Furthermore, we propose that metal-induced toxicity of Aβ1−42 is reflective of their ability to preserve smaller oligomeric species in vitro." @default.
• W3157410501 created "2021-05-10" @default.
• W3157410501 creator A5010500741 @default.
• W3157410501 creator A5063199689 @default.
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• W3157410501 date "2021-09-01" @default.
• W3157410501 modified "2023-09-25" @default.
• W3157410501 title "Monitoring the early aggregatory behaviour and size of Aβ1-42 in the absence & presence of metal ions using dynamic light scattering" @default.
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• W3157410501 doi "https://doi.org/10.1016/j.jtemb.2021.126766" @default.
• W3157410501 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33964808" @default.
• W3157410501 hasPublicationYear "2021" @default.
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