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Surface modification for realizing implantable biosensors

Research Project

Project/Area Number 02650294
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 計測・制御工学
Research InstitutionUniversity of Tokyo, Faculty of Medicine

Principal Investigator

IKEDA Kenji  Univ. of Tokyo, Faculty of Medicine, Instructor, 医学部(医), 助手 (70010030)

Co-Investigator(Kenkyū-buntansha) WATANABE Akira  Univ. of Tokyo, Faculty of Medicine, Associate Professor, 医学部, 助教授 (00009937)
SAITO Masao  Univ. of Tokyo, Faculty of Medicine, Professor, 医学部, 教授 (60010708)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1991: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1990: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsIon-sensive field-effect transistro / Plasma-polymerized mambrane / SH-groups / Immobilized antibody / Non-specific adsorption / Surface potential / 有機膜 / プラズマ重合 / ヘキサメチルジシロキサン / 電界効果トランジスタ / 親水化 / アミノ基
Research Abstract

It is important for implantable immune-sensors by using ion-sensitive field-effect transistor(ISFET)to immobilize antibody-protein with high density and high activity. In this research, we use plasmapolymerized membrane for the career of inunobilized antibody. We use Hexamethyldisiloxane(HMDS), which is excellent in adhesion to silicon substrate, for the materials of organic membrane, and fabricate the membrane by plasma-polymerized method. We introduce SH-groups on the surface of organic membrane as functional group to inunobilize antibody by applying glow-discharge treatment to ethanedithiol having SH-groups. We confirm that hydrohibic surface becomes hydrophobic by this surface modification. The contact angle of the surface tension, which was 125゚ with water, turns 52゚ after modification. The fact that XPS signals of sulfur is observed only in the modificated membrane, is the evidence that SH-groups are introduced. Cysteine is covalently immobilized by SS-bond on the surface. The an … More tibody(anti-Human Serum Albrffin IgG)is covalently immobilized with crosslinking NH_2-groups of cysteine and SH-groups of antibody F_<ab>' hinge together with bifunctional reagent. The activity immobilized activated antibody density is of the order of 10^<11>[cm^<-2>](the closest density is 2X10^<12>)by enzymeimmunoassey(EIA), which shows high density immobilization. To investigate quantity of non-specific adsorption, organic membrane having no immobilized antibody is similarly measured by EIA. As a result, the membrane introduced SH-groups and Cysteine has less non-specific adsorption than that of NH_2-groups. We measure the changing of surface potential of this immobilized antibody caused by antigen-antibody binding. A surface potential change of the order of 0.1 mV is observed at the antigen concentration of 0.01 - 1 mg/ml. We attain the same result in the case that the antigen coexists with other substances(Bovine Serum). This result suggests the possibility of realizing immune-sensors. Less

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 鈴木 誠一: "有機膜表面改質による固定化抗体の活性保持" 医用電子と生体工学特別号 第29回日本ME学会論文集. 28. 84-84 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 鈴木 誠一: "Surface Modification of ImmunoーSemiconductor Sensor" Proceeding of Far Eastern Conference on Medical and Biological Engineering 1990. 272-273 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 六車 仁志: "プラズマ重合膜を用いた免疫センサ実現のための表面電位の測定" 第39回応用物理学関係連合講演会. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. Suzuki: "Activity Retainment of Immobilized Antibody by Surface Modification of Organic Membrane" Proc. 29th conf. Japan Soc. MEBE. 84 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. Suzuki: "Surface Modification of Immuno-Semiconductor Sensor" Proc. Far Easter Conf. on Medical and Biol. Engin.272-273 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H. Muguruma: "Measurement of Surface Potential for Immuno-sensors using Plasma-Polymerized mumbrane" Extended Abstracts (The 39th Spring Meeting, 1992) The Japan Soc, of Appl. Phys and Related Societies.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 鈴木 誠一: "有機膜表面改質による固定化抗体の活性保持" 医用電子と生体工学特別号 第29回日本ME学会論文集. 28. 84-84 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] 鈴木 誠一: "Surface Modification of ImmunoーSemiconductor Sensor" Proceeding of Far Eastern Conference on Medical and Biological Engineering 1990. 272-273 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] 六車 仁志: "プラズマ重合膜を用いた免疫センサ実現のための表面電位の測定" 第39回応用物理学関係連合講演会. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 鈴木 誠一: "有機膜表面改質による固定化抗体の活性保持" 医用電子と生体工学 特別号 第29回日本ME学会論文集. 28. 84 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 鈴木 誠一: "Surface Modification of ImmunoーSemiconductor Sensor" Proceedings of Far Eastern Conference on Medical and Biological Engineering 1990. 272-273 (1990)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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