論文

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2021年5月2日

Fibril growth behavior of amyloid β on polymer-based planar membranes: Implications for the entanglement and hydration of polymers

Applied Sciences (Switzerland)
  • Toshinori Shimanouchi
  • ,
  • Miki Iwamura
  • ,
  • Shintaro Deguchi
  • ,
  • Yukitaka Kimura

11
10
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.3390/app11104408

The design of biosensors and artificial organs using biocompatible materials with a low affinity for amyloid β peptide (Aβ) would contribute to the inhibition of fibril growth causing Alzheimer’s disease. We systematically studied the amyloidogenicity of Aβ on various planar mem-branes. The planar membranes were prepared using biocompatible polymers, viz., poly(methyl methacrylate) (PMMA), polysulfone (PSf), poly(L-lactic acid) (PLLA), and polyvinylpyrrolidone (PVP). Phospholipids from biomembranes, viz., 1,2-dioleoyl-phosphatidylcholine (DOPC), 1,2-dipalmitoyl-phosphatidylcholine (DPPC), and polyethylene glycol-graft-phosphatidyl ethanolamine (PEG-PE) were used as controls. Phospholipid-and polymer-based membranes were prepared to determine the kinetics of Aβ fibril formation. Rates of Aβ nucleation on the PSf-and DPPC-based membranes were significantly higher than those on the other membranes. Aβ accumulation, cal-culated by the change in frequency of a quartz crystal microbalance (QCM), followed the order: PSf > PLLA > DOPC > PMMA, PVP, DPPC, and PEG-PE. Nucleation rates exhibited a positive correlation with the corresponding accumulation (except for the DPPC-based membrane) and a negative correlation with the molecular weight of the polymers. Strong hydration along the polymer backbone and polymer–Aβ entanglement might contribute to the accumulation of Aβ and subsequent fibrillation.

リンク情報
DOI
https://doi.org/10.3390/app11104408
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85106583867&origin=inward 本文へのリンクあり
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https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85106583867&origin=inward
ID情報
  • DOI : 10.3390/app11104408
  • eISSN : 2076-3417
  • SCOPUS ID : 85106583867

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