Bulletin of the Korean Chemical Society

  • 제33권1호
  • /
  • Pages.100-104
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  • 2012
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Spectroscopic and Electrochemical Detection of Thrombin/5'-SH or 3'-SH Aptamer Immobilized on (porous) Gold Substrates

  • Park, Buem-Jin (Department of Chemical Engineering, Kwangwoon University) ;
  • Sa, Young-Seung (Department of Chemical Engineering, Kwangwoon University) ;
  • Kim, Yong-Hwan (Department of Chemical Engineering, Kwangwoon University) ;
  • Kim, Young-Hun (Department of Chemical Engineering, Kwangwoon University)
  • 투고 : 2011.08.01
  • 심사 : 2011.11.06
  • 발행 : 2012.01.20
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초록

Thrombin is a serine protease that catalyzes the conversion of soluble fibrinogen to insoluble fibrin, and thus induces physiological and pathological blood coagulation. Therefore, it is important to detect thrombin in blood serum for purposes of diagnosis. To achieve this goal, it has been suggested that a 15-mer aptamer strongly binds with thrombin to form a G-quartet structure of the aptamer. Generally, 5'-end thiol-functionalized aptamer has been used as an anti-thrombin binder. Herein, we evaluate the possibility of utilizing a 3'-SH aptasensor for thrombin detection using SPR spectroscopy, and compare the enhancement of the electrochemical signal of the thrombin-aptamer bound on a porous gold substrate. Although the two aptamers have similar configurations, in SPR analysis, the 3'-SH aptamer was a effective aptasensor as well as 5'-SH aptamer. Results from electrochemical analysis showed that the porous gold substrate acted as a good substrate for an aptasensor and demonstrated 5-fold enhancement of current change, as compared to gold thin film.

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피인용 문헌

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  2. Waveguide-Mode Sensors as Aptasensors vol.12, pp.2, 2012, https://doi.org/10.3390/s120202136
  3. Aptamer-based fiber sensor for thrombin detection vol.21, pp.8, 2016, https://doi.org/10.1117/1.JBO.21.8.087005