Time-Dependent Lipid Dynamics, Organization and Peptide-Lipid Interaction in Phospholipid Bilayers with Incorporated β-Amyloid Oligomers.

ABSTRACT: Nonfibrillar β-amyloid (Aβ) oligomers are considered as major neurotoxic species in the pathology of Alzheimer's disease. The presence of Aβ oligomers was shown to cause membrane disruptions in a broad range of model systems. However, the molecular basis of such a disruption process remains unknown. We previously demonstrated that membrane-incorporated 40-residue Aβ (Aβ₄₀) oligomers could form coaggregates with phospholipids. This process occurred more rapidly than the fibrillization of Aβ₄₀ and led to more severe membrane disruption. The present study probes the time-dependent changes in lipid dynamics, bilayer structures, and peptide-lipid interactions along the time course of the oligomer-induced membrane disruption, using solid-state NMR spectroscopy. Our results

SUBMITTER: Qiang W 

PROVIDER: S-EPMC7647725 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature