Electrochemical microchip was fabricated by assembling a surface-functionalized poly(dimethylsiloxane) (PDMS) microchannel with an interdigitated array (IDA) gold electrode to sensitively and rapidly detect human cardiac troponin I (cTnI). Using a confocal microscope, a significant fluorescence detected within a FITC-labeled immunoglobulin G (instead of antibodies) bound to the PDMS channel indicated the feasibility of the direct binding of antibodies onto the PDMS channel. To suppress electrode fouling, anti-cTnI was immobilized onto the PDMS channel on which protein G layer had been generated by silanization, and then the PDMS channel was assembled with an IDA chip. The detection experiments were performed with successive injection of cTnI, alkaline phosphatase-labeled anti-cTnI, and p-aminophenylphosphate. Then, cyclic voltammograms were obtained by the oxidation peak current proportionally to the concentration of enzymatic product, p-aminophenol. The optimal packing density of anti-cTnI on the surface of PDMS channel was determined at the anti-cTnI concentration of 30 µg/ml. These demonstrate that the proper orientation and best packing density of antibody as well as no electrode fouling contributed to the low detection limit (148 pg/ml) of cTnI within 8 min.
저자
Sungho KO [ Food Nanotechnology Research Group, Korea Food Research Institute ]
Bumjun KIM [ Dept. of BioSystems, Korea Advanced Institute of Science and Technology (KAIST) ]
Seong-Sik JO [ Dept. of BioSystems, Korea Advanced Institute of Science and Technology (KAIST) ]
Je-Kyun PARK [ Dept. of BioSystems, Korea Advanced Institute of Science and Technology (KAIST) ]
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
이 법인은 생물 공학의 발전과 보급에 이바지하고, 회원 상호 간의 연구 협력과 친목을 도모함을 목적으로 한다
1. 생물공학 분야의 발전을 위한 연구 협력
2. 생물공학의 실용화를 촉진시키기 위한 산학 협동
3. 학술연구 발표회, 강연회, 연수회 등 학술활동의 개최
4. 국,영문 학술지,소식지,학술회의 Proceedings 및 학술도서의 발간
5. 생물공학 발전을 위한 정책 건의
6. 기타 국제 교류 등 본 학회의 목적 달성을 위한 제반 활동