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Optical Fiber-Type Sugar Chip Using Localized Surface Plasmon Resonance.

Masahiro Wakao1, Shogo Watanabe1, Yoshie Kurahashi1

  • 1Department of Chemistry, Biotechnology, and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University , 1-21-40 Kohrimoto, Kagoshima, Kagoshima 890-0065, Japan.

Analytical Chemistry
|December 20, 2016
PubMed
Summary

Researchers developed novel fiber-type Sugar Chips using localized surface plasmon resonance (LSPR) for analyzing sugar moiety-protein interactions. These chips offer high specificity and sensitivity, requiring only a small sample volume for analysis.

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Area of Science:

  • Biotechnology
  • Nanotechnology
  • Analytical Chemistry

Background:

  • Surface Plasmon Resonance (SPR) sensors are crucial for analyzing biomolecular interactions.
  • Conventional SPR sensors often require larger sample volumes, limiting their application for precious or scarce samples.
  • Developing miniaturized and sensitive biosensors is essential for advancing diagnostics and research.

Purpose of the Study:

  • To develop a novel optical fiber-type Sugar Chip utilizing localized surface plasmon resonance (LSPR).
  • To analyze sugar moiety-protein interactions with high specificity and sensitivity.
  • To demonstrate the applicability of the developed Sugar Chip for small sample volumes.

Main Methods:

  • Fabrication of fiber-type Sugar Chips by immobilizing gold nanoparticles onto an aminosilylated optical fiber endface.
  • Functionalization of gold nanoparticles with sugar moieties using original sugar chain-ligand conjugates.
  • Analysis of sugar moiety-protein interactions using the developed LSPR-based fiber-type Sugar Chip.

Main Results:

  • The fiber-type Sugar Chips demonstrated specificity, sensitivity, and quantitative binding potency identical to conventional SPR sensors.
  • The developed sensor required a significantly smaller sample volume (10 μL) compared to conventional SPR sensors (100 μL).
  • The results indicate the potential of LSPR-based fiber-type Sugar Chips for analyzing interactions with non-pure, small protein masses.

Conclusions:

  • Fiber-type Sugar Chips based on LSPR offer a sensitive and specific platform for analyzing sugar moiety-protein interactions.
  • The reduced sample volume requirement makes this technology suitable for analyzing precious or limited biological samples.
  • This novel biosensor design holds promise for applications in diagnostics, drug discovery, and fundamental biological research.