이선우 (고려대학교) | 한빛사논문 > 한빛사

한빛사논문

조회405

이선우Seonwoo Lee

고려대학교

Biosens. Bioelectron., 2022 Aug 15;210:114295 | https://doi.org/10.1016/j.bios.2022.114295 Synergistic enhanced rolling circle amplification based on mutS and radical polymerization for single-point mutation DNA detection

Seonwoo Lee^a,1, Juneseok You^a,1, Inchul Baek^a, Hyunjun Park^a, Kuewhan Jang^b, Chanho Park^c, Sungsoo Na^a

^aDepartment of Mechanical Engineering, Korea University, Seoul, 02841, Republic of Korea
^bSchool of Mechanical Engineering, Hoseo University, Asan, 31499, Republic of Korea
^cDivision of Foundry, Samsung Electronics, Hwaseong-si, 18448, Republic of Korea

Corresponding authors: Chanho Park, Sungsoo Na
¹These authors contributed equally to this work.

Abstract

The detection of nucleic acids in biofluids is essential for changing the paradigm of disease diagnosis. As there are very few nucleic acids present in human biofluids, a high sensitivity method is required to detect nucleic acids for disease diagnosis. The Kirsten rat sarcoma viral oncogene homolog (KRAS) mutation is associated with non-small cell lung cancer. It is a point mutation and requires a highly selective detection technique. In this study, high sensitivity and selectivity were achieved for the detection of KRAS mutation using rolling circle amplification (RCA), atomic transfer radical polymerization (ATRP), mutS enzyme, and electrochemical sensors. Although RCA can isothermally amplify DNA, it has low selectivity for detecting single-base mismatch DNA, and its sensitivity is not suitable for circulating tumor DNA detection. The selectivity of RCA was improved by using mutS, which can bind specifically to point mutations. In addition, as a method of isothermal radical polymerization, ATRP was used to amplify the weak signal of RCA. Since RCA and ATRP reactions occur simultaneously, detection time was reduced, and the calculated detection limit was 3.09 aM. Computational and experimental analyses were conducted to verify each detection step and the combination of mutS, ATRP, and RCA. The experiment was performed using normal human serum samples for biological application, and the proposed detection method was confirmed to have excellent potential for diagnosing cancer patients.

논문정보

형식Research article
게재일2022년 08월 (BRIC 등록일 2023-01-13)
연구진국내 연구진
분야 바이오·의료융합 > 바이오센싱 및 나노바이오물질

댓글 작성 로그인

CV 열람하기

연락처 보기