論文

国際誌
2015年4月

ToF-SIMS observation for evaluating the interaction between amyloid β and lipid membranes

Analytical and Bioanalytical Chemistry
  • Satoka Aoyagi
  • ,
  • Toshinori Shimanouchi
  • ,
  • Tomoko Kawashima
  • ,
  • Hideo Iwai

407
10
開始ページ
2859
終了ページ
63
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1007/s00216-015-8527-3

© 2015 Springer-Verlag Berlin Heidelberg. Abstract The adsorption behaviour of amyloid beta (Aβ), thought to be a key peptide for understanding Alzheimer's disease, was investigated by means of time-of-flight secondary ion mass spectrometry (ToF-SIMS). Aβ aggregates depending on the lipid membrane condition though it has not been fully understood yet. In this study, Aβ samples on different lipid membranes, 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC), 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) and 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC), were observed with ToF-SIMS and the complex ToF-SIMS data of the Aβ samples was interpreted using data analysis techniques such as principal component analysis (PCA), gentle-SIMS (G-SIMS) and g-ogram. DOPC and DMPC are liquid crystal at room temperature, while DPPC is gel at room temperature. As primary ion beams, Bi<inf>3</inf><sup>+</sup> and Ar cluster ion beams were used and the effect of an Ar cluster ion for evaluating biomolecules was also studied. The secondary ion images of the peptide fragment ions indicated by G-SIMS and g-ogram were consistent with the PCA results. It is suggested that Aβ is adsorbed homogeneously on the liquid-crystalline-phase lipid membranes, while it aggregates along the lipid on the gel-phase lipid membrane. Moreover, in the results using the Ar cluster, the influence of contamination was reduced.

リンク情報
DOI
https://doi.org/10.1007/s00216-015-8527-3
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/25687682
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000351509900019&DestApp=WOS_CPL
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84938361728&origin=inward
ID情報
  • DOI : 10.1007/s00216-015-8527-3
  • ISSN : 1618-2642
  • eISSN : 1618-2650
  • PubMed ID : 25687682
  • SCOPUS ID : 84938361728
  • Web of Science ID : WOS:000351509900019

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