Abstract:
PURPOSE: A quantitation method using an emzyme, aptamer, antibody, microtube, and magnetic beads or substrate is provided to enable diagnosis using an analyte of low concentration. CONSTITUTION: A quantitation method of an analyte comprises: a step of mixing magnetic beads or substrate and a first analyte-binding aptamer or antibody to prepare an aptamer/antibody1-magnetic bead/substrate; a step of adding the aptamer/antibody1-magnetic bead/substrate into a test solution containing the analyte to prepare an analyte-aptamer/antibody1-magnetic bead/substrate; a step of isolating an analyte-aptamer/antibody1-magnetic bead/substrate from the test solution; a step of mixing the enzyme and microtube to prepare enzyme-microtune in which enzyme is integrated on the surface; a step of mixing a second analyte-binding aptamer or antibody with the enzyme-microtube to prepare an aptamer/antibody2-enzyme-microtube; a step of mixing the analyte-aptamer/antibody1-magnetic bead/substrate and the aptamer/antibody2-enzyme-microtube to prepare a magnetic bead/substrate-aptamer/antibody1-analyte-aptamer/antibody2-enzyme-microtube; a step of isolating the microbead/substrate-aptamer/antibody1-analyte-aptamer/antibody2-enzyme-microtube; and a step of quantitating the isolated microbead/substrate-aptamer/antibody1-analyte-aptamer/antibody2-enzyme-microtube.
Abstract:
PURPOSE: A cadmium selenide/zinc sulfide quantum dot and a method for measuring concentration of platelet-derived growth factor using the same are provided to simplify the method and to enhance measurement efficiency. CONSTITUTION: A cadmium selenide/zinc sulfide quantum dot comprises platelet growth factor(PDGF) aptamer fixed on the surface. The quantum dot causes FRET(Fluorescence Resonance Energy Transfer) phenomenon by black hole quencher(BHQ). A method for measuring the concentration of platelet-derived growth factor comprises: a step of dispersing platelet-derived growth factor aptamer-fixed cadmium selenide/zinc sulfide quantum dot in a buffer solution to form a first solution; a step of fixing BHA on the surface of oligonucleotide; a step of reacting BHQ-fixed oligonucleotide in the first solution to obtain a second solution; and a step of adding platelet-derived growth factor to the second solution and measuring quantum dot intensity.
Abstract:
본 발명은 앱타머(aptamer)를 포함하는 폴리다이아세틸렌(polydiacetylene) 센서칩 및 그 제조방법에 관한 것으로, 분석대상에 대응되는 프루브(probe) 앱타머, 폴리다이아세틸렌 소포(vesicle), 및 기판을 결합시켜 분석대상에 별도의 표지처리 없이 빠른 응답시간을 보이는 센서칩 및 그 제조방법에 관한 것이다. 본 발명에 따르면 상기 폴리다이아세틸렌 소포를 글래스슬라이드에 마이크로어레이 형태로 점적, 고정화시킴과 아울러, 단백질 또는 미생물의 검출을 위한 프루브로서의 앱타머를 상기 소포에 결합하여 센서칩을 제조할 수 있으며, 상기 센서칩은 프루브 앱타머와 단백질, 또는 프루브 앱타머와 미생물의 특정 결합에 의해서만 소포의 색전이 및 형광 발현을 일으킬 수 있어, 본 발명의 마이크로어레이 형태의 폴리다이아세틸렌 센서칩은 종래 액상 반응에 비해 훨씬 적은 양의 폴리다이아세틸렌 및 분석대상물로, 앱타머-단백질 또는 앱타머-미생물 수준의 반응을 검출하는 바이오센서로서 활용이 가능하다. 나아가, 고감도를 나타내면서도 소형화를 달성하여 휴대가 용이한 장점 또한 가지고 있다. 특히, 입수가 용이하고 소독제나 환경 변화에 대한 내성이 강해 생화학무기로의 활용가능성이 높은 탄저균에 대해서도 짧은 시간 내에 정확한 분석이 가능한 바, 진단분야 등에서의 이용가능성도 매우 높은 것으로 판단된다. 폴리다이아세틸렌, 센서칩, 마이크로어레이, 색전이, 형광, 탄저균
Abstract:
A polydiacetylene sensor chip comprising protein is provided to detect rapidly protein-protein or protein-cell reaction without labeling of the subject to be analyzed, and reduce the amount of polydiacetylene and subject to be analyzed. A polydiacetylene sensor chip comprises a substrate, a vesicle bound to the substrate and having polymerized diacetylene represented by the formula(1): A-(L1)d-(CH2)e-C=C-C=C-(CH2)f-(L2)g-B, and a probe protein bound to the vesicle, wherein a sum d and g is 0, 1 or 2; a sum of e and f is an integer from 2 to 50; e and f are each independently an integer of 1 or more; A and B are each independently methyl group, amine group, carboxyl group, hydroxyl group, maleimide group, biotin group, hydroxysuccinimide group, benzoic acid group or ester group; and L1 and L2 are each independently alkyl group having carbon number of 2 or more, at least one ethylene oxide group, amine group, amide group, ester group or carbonyl group.