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Cao X, Mao Y, Gu Y, Ge S, Lu W, Gu Y, Li Z. Highly sensitive and simultaneous detection of ctDNAs related to non-small cell lung cancer in serum using a catalytic hairpin assembly strategy in a SERS microfluidic chip. J Mater Chem B 2022; 10:6194-6206. [PMID: 35904034 DOI: 10.1039/d2tb01024k] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Circulating tumor DNA (ctDNA) is an ideal biomarker for cancer diagnosis based on liquid biopsy, so there is an urgent need for developing an efficient, rapid, and ultrasensitive detection method to meet clinical needs. In this paper, a novel surface-enhanced Raman scattering (SERS) microfluidic chip combined with a catalytic hairpin assembly (CHA) was proposed to detect two non-small cell lung cancer (NSCLC)-related ctDNA (TP53 and PIK3CA-Q546K) simultaneously. The chip consists of six channels for parallel detection. In the reaction region, the CHA reaction between HP1 of the SERS probe and HP2 of the capture substrate was triggered by ctDNAs to form HP1-HP2 duplexes. As the reaction proceeds, more and more SERS probes are captured on the substrate. The gathered reaction products continuously form a lot of hot spots, which greatly enhance the SERS signal. This reaction was completed within 5 minutes. Through this method, the detection limits of TP53 and PIK3CA-Q546K in human serum were as low as 2.26 aM and 2.34 aM, respectively. The microfluidic chip also exhibited high specificity, reproducibility and stability. The clinical feasibility of the SERS microfluidic chip was verified by analyzing the serum samples of healthy subjects and NSCLC patients. The reliability of the experimental results was verified by the qRT-PCR test. The constructed SERS-based analytical micro-platform has great potential in dynamic monitoring of cancer staging and could be used as a clinical tool for early cancer screening.
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Affiliation(s)
- Xiaowei Cao
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, P. R. China. .,Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, P. R. China.,Jiangsu Key Laboratory of Experimental & Translational Noncoding RNA Research, Medical College, Yangzhou University, Yangzhou, 225001, P. R. China
| | - Yu Mao
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, P. R. China. .,Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, P. R. China.,Jiangsu Key Laboratory of Experimental & Translational Noncoding RNA Research, Medical College, Yangzhou University, Yangzhou, 225001, P. R. China
| | - Yuexing Gu
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, P. R. China. .,Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, P. R. China.,Jiangsu Key Laboratory of Experimental & Translational Noncoding RNA Research, Medical College, Yangzhou University, Yangzhou, 225001, P. R. China
| | - Shengjie Ge
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, P. R. China. .,Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, P. R. China.,Jiangsu Key Laboratory of Experimental & Translational Noncoding RNA Research, Medical College, Yangzhou University, Yangzhou, 225001, P. R. China
| | - Wenbo Lu
- Shanxi Normal University, College of Chemistry and Material Science, Linfen, 041004, P. R. China
| | - Yingyan Gu
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, P. R. China. .,Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, P. R. China.,Jiangsu Key Laboratory of Experimental & Translational Noncoding RNA Research, Medical College, Yangzhou University, Yangzhou, 225001, P. R. China
| | - Zhiyue Li
- The First Clinical College, Dalian Medical University, Dalian, 116000, P. R. China
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