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논문 기본 정보

자료유형
학술저널
저자정보
임정민 (경북대학교) 물야수피안토 (경북대학교) 김태양 (Kick the Hurdle) 김병수 (Kick the Hurdle) 박정우 (Kick the Hurdle) 장현희 (Kick the Hurdle) 이혜진 (경북대학교)
저널정보
한국바이오칩학회 BioChip Journal BioChip Journal Vol.17 No.1
발행연도
2023.3
수록면
93 - 103 (11page)
DOI
10.1007/s13206-022-00093-w

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A lateral flow assay (LFA) sensor on a half-strip platform labeled with blue carbon nanodot-polystyrene (PS-CND) nanoconjugates was developed for the detection of carcinoembryonic antigen (CEA) levels in buffer and serum solutions from healthy and cancer patients. CNDs, biocompatible nanoparticles containing amino groups synthesized by hydrothermal synthesis, were conjugated to spherical polystyrene (PS) beads with an average diameter of 60 nm, followed by the attachment of a detection probe, anti-CEA (M0911042), using a heterobifunctional cross-linker. PS beads were used as a template in CND conjugates to provide uniform size and shape of fluorescent labels without losing CND fluorescence intensity after the antibody conjugation step and to improve fluorescence stability. Upon the interaction of CEA from samples with the anti-CEA (M0911042) probe-modified PS-CND, which was further adsorbed onto a test line composed of the capture antiCEA (M0911041) physisorbed onto a nitrocellulose membrane, the fluorescent signals on the test line increased as a function of the CEA concentrations under irradiation with a portable 365 nm ultraviolet lamp. A linear concentration range of 0.04–70 nM in buffer was observed, with a limit of detection of 0.3 nM. The applicability of the developed LFA half-strip sensor for disease diagnosis was demonstrated by identifying fluorescent levels on the test line due to the presence of CEA in serum samples from cancer patients. Importantly, signals from healthy human serum solutions because of lower CEA concentrations beyond the sensor detection capability were clearly distinguished from the patient ones.

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