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Nanomechanical microcantilever operated in vibration modes with use of RNA aptamer as receptor molecules for label-free detection of HCV helicase

  • Kyo Seon Hwang
  • , Sang Myung Lee
  • , Kilho Eom
  • , Jeong Hoon Lee
  • , Yoon Sik Lee
  • , Jung Ho Park
  • , Dae Sung Yoon*
  • , Tae Song Kim
  • *Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We report the nanomechanical microcantilevers operated in vibration modes (oscillation) with use of RNA aptamers as receptor molecules for label-free detection of hepatitis C virus (HCV) helicase. The nanomechanical detection principle is that the ligand-receptor binding on the microcantilever surface induces the dynamic response change of microcantilevers. We implemented the label-free detection of HCV helicase in the low concentration as much as 100 pg/ml from measuring the dynamic response change of microcantilevers. Moreover, from the recent studies showing that the ligand-receptor binding generates the surface stress on the microcantilever, we estimate the surface stress, on the oscillating microcantilevers, induced by ligand-receptor binding, i.e. binding between HCV helicase and RNA aptamer. In this article, it is suggested that the oscillating microcantilevers with use of RNA aptamers as receptor molecules may enable one to implement the sensitive label-free detection of very small amount of small-scale proteins.

    Original languageEnglish
    Pages (from-to)459-465
    Number of pages7
    JournalBiosensors and Bioelectronics
    Volume23
    Issue number4
    DOIs
    Publication statusPublished - 2007 Nov 30

    Bibliographical note

    Funding Information:
    Three authors (K.S.H., S.M.L. and K.E.) made equal contribution to this work. We thank Prof. Byung-Gee Kim and Dr. Suhyung Cho for preparation of RNA aptamers and HCV helicase. The authors are very grateful for the financial support by Intelligent Microsystem Center sponsored by Korea Ministry of Science and Technology as a part of the 21st century's Frontier R&D Projects (grant MS-01-133-01) and National Core Research Center for Nanomedical Technology sponsored by KOSEF (grant R15-2004-024-00000-0).

    UN SDGs

    This output contributes to the following UN Sustainable Development Goals (SDGs)

    1. SDG 3 - Good Health and Well-being
      SDG 3 Good Health and Well-being

    Keywords

    • HCV helicase
    • Microcantilever
    • Nanomechanics
    • RNA aptamer
    • Resonant frequency

    ASJC Scopus subject areas

    • Biotechnology
    • Biophysics
    • Biomedical Engineering
    • Electrochemistry

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