Effect of Surfaces on Amyloid Fibril Formation

TL;DR

This study uses atomic force microscopy to examine how different chemically modified surfaces influence amyloid beta fibril formation, shedding light on amyloid toxicity mechanisms related to cell membrane interactions.

Contribution

It provides new insights into how surface charge and hydrophobicity affect amyloid beta fibril structure and density, advancing understanding of amyloid toxicity.

Findings

Positively charged surfaces promote fibril formation.

Negatively charged surfaces inhibit fibril aggregation.

Hydrophobic surfaces alter fibril morphology.

Abstract

Using atomic force microscopy (AFM) we investigated the interaction of amyloid beta (Ab) (1 42) peptide with chemically modified surfaces in order to better understand the mechanism of amyloid toxicity, which involves interaction of amyloid with cell membrane surfaces. We compared the structure and density of Ab fibrils on positively and negatively charged as well as hydrophobic chemically modified surfaces at physiologically relevant conditions.