Modeling Fibril Fragmentation in Real-Time

TL;DR

This paper introduces a highly efficient method for modeling amyloid fiber fragmentation that significantly accelerates calculations and enables real-time analysis, overcoming previous computational bottlenecks.

Contribution

An innovative two-step approach combining moment-closure equations and distribution reconstruction for rapid fiber fragmentation modeling.

Findings

Speeds up calculations by at least ten thousand times.

Maintains satisfactory accuracy with appropriate distribution assumptions.

Proven effective on micelle fragmentation data.

Abstract

During the application of mass-action equation models to the study of amyloid fiber formation, time-consuming numerical calculations constitute a major bottleneck when no analytical solution is available. To conquer this difficulty, here an alternative efficient method is introduced for the fragmentation-only model. It includes two basic steps: (1) simulate close-formed time-evolution equations for the number concentration P(t) derived from the moment-closure method; (2) reconstruct the detailed fiber length distribution based on the knowledge of moments obtained in the first step. Compared to direct solution, current method speeds up the calculation by at least ten thousand times. The accuracy is also quite satastifactory if suitable forms of approximate distribution fucntion is taken. Further application to PI264-b-PFS48 micelles study performed by Guerin et al. confirms our method is very promising for the real-time analysis of the experimental data on fiber fragmentation.