4.7 Article

On-Site Detection of Carcinoembryonic Antigen in Human Serum

期刊

BIOSENSORS-BASEL
卷 11, 期 10, 页码 -

出版社

MDPI
DOI: 10.3390/bios11100392

关键词

lateral flow immunoassay; carcinoembryonic antigen; cancer diagnosis; smartphone-based sensors; point-of-care testing

资金

  1. Iran National Science Foundation (INSF) [97001910]
  2. Tabriz University of Medical Sciences [60836, 63253]

向作者/读者索取更多资源

A convenient kit was developed for on-site detection of CEA in human serum, utilizing cellulose-based lateral flow strips and a smartphone-based system for signal reading and processing. Excellent correlation was demonstrated in clinical sample testing, showing potential for monitoring cancer treatment.
Real-time connectivity and employment of sustainable materials empowers point-of-care diagnostics with the capability to send clinically relevant data to health care providers even in low-resource settings. In this study, we developed an advantageous kit for the on-site detection of carcinoembryonic antigen (CEA) in human serum. CEA sensing was performed using cellulose-based lateral flow strips, and colorimetric signals were read, processed, and measured using a smartphone-based system. The corresponding immunoreaction was reported by polydopamine-modified gold nanoparticles in order to boost the signal intensity and improve the surface blocking and signal-to-noise relationship, thereby enhancing detection sensitivity when compared with bare gold nanoparticles (up to 20-fold in terms of visual limit of detection). Such lateral flow strips showed a linear range from 0.05 to 50 ng/mL, with a visual limit of detection of 0.05 ng/mL and an assay time of 15 min. Twenty-six clinical samples were also tested using the proposed kit and compared with the gold standard of immunoassays (enzyme linked immunosorbent assay), demonstrating an excellent correlation (R = 0.99). This approach can potentially be utilized for the monitoring of cancer treatment, particularly at locations far from centralized laboratory facilities.

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