Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 43
·8931-8944
·
IF 7.571
Shengjie Ge,Yujie Wang,Zhiyue Li,Bin Lu,Jinhua Zhu,Hongmei Lu,Xiaowei Cao,Yayun Qian
In this study, we apply catalytic hairpin assembly (CHA) as the signal amplification strategy for the quantification of carcinoembryonic antigen (CEA) and cytokeratin fragment antigen 21-1 (CYFRA21-1) with a surface-enhanced Raman scattering (SERS) microfluidic chip (LoC-SERS) as the carrier. Herein, antibody–DNA conjugates are designed to assist the application of CHA amplification in protein detection. In the presence of protein biomarkers, antibody–DNA conjugates can specifically bind to the target proteins, forming the antigen@antibody–DNA conjugates. The terminal free part of the DNA on the conjugates can trigger the CHA events to connect SERS nanotags to capture nanoprobes. Then, micro-magnet can gather the CHA products in a rectangular chamber, resulting in the aggregation of SERS nanotags, which can ultimately generate abundant “hot spots” for SERS signal enhancement. Using this strategy, CEA and CYFRA21-1 can be successfully determined with a limit of detection (LOD) as low as pg mL−1, much lower than recently reported methods. Meanwhile, a non-small cell lung cancer (NSCLC)-xenografted mouse model was established, and SERS was applied to analyze the expression level of CEA and CYFRA21-1 in tumorigenesis and development. The comparison between SERS results and those of the ELISA method demonstrated a high degree of consistency, suggesting that the proposed CHA-assisted LoC-SERS device has satisfying accuracy. Thus, introducing the CHA strategy via the design of antibody–DNA conjugates opens new gates to ultra-sensitive and specific SERS detection of protein biomarkers.
研究领域:
生物医学工程
·
分析化学
·
癌症研究
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xiaowei Cao,Shengjie Ge,Miao Chen,Haiyan Mao,Ying Wang
Multiplexed detection of Parkinson’s disease (PD) biomarkers is of great significance for early diagnosis and personalized treatment. In this study, we fabricated a robust surface-enhanced Raman scattering-enabled lab-on-a-chip (LoC-SERS) platform for simultaneous quantification of α-synuclein, phosphorylated tau protein 181, osteopontin, and osteocalcin. Herein, the antibody–DNA conjugate was designed to introduce the catalytic hairpin self-assembly (CHA) amplification into the protein detection. Au nano-stars (AuNSs) modified with Raman reporter molecules and hairpin-structure DNA 1 were applied as the SERS nanotags. Au-coated silicon nanocone array (Au/SiNCA) fabricated based on the maskless plasma etching-prepared high-density Si nanocone array (SiNCA) and surface ion sputtering was used as the capture substrate after the modification of hairpin-structure DNA 2. Benefitting from the antibody–DNA conjugate-induced CHA amplification, numerous AuNSs can be connected to the Au/SiNCA surface, which significantly amplify the plasmonic coupling effect for ultrasensitive SERS detection, and the limit of detection was less than the pg/mL level. The application of highly uniform Au/SiNCA and antibody–DNA conjugate endows the LoC-SERS platform excellent analytical performance, including superior reproducibility, satisfactory universality, and high sensitivity. In addition, a 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced PD mice model was established, and satisfactory results were obtained in real sample analysis with the LoC-SERS platform, which may be enlightening for exploiting protein biomarkers in PD monitoring.
研究领域:
生物医学工程
·
分析化学
·
神经科学
·
疾病诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2023
·
IF 6.1
Xiaowei Cao,Zhengqing Liu,Xiaogang Qin,Yuexing Gu,Yong Huang,Yayun Qian,Zhenguang Wang,Hongbo Li,Qunshan Zhu,Wei Wei
Colorectal cancer (CRC) remains a significant contributor to the global mortality rate, and a single biomarker cannot meet the specificity required for CRC screening. To this end, we developed a multiplexed, pump-free surface-enhanced Raman scattering (SERS) microfluidic chip (LoC-SERS) using a one-step recognition release mechanism; the aptamer-functionalized novel Au nanocrown array (AuNCA) was used as the detection element embedded in the detection zone of the platform for rapid and specific detection of protein markers in multiple samples simultaneously. Here, the corresponding aptamer specifically captured the protein marker, causing the complementary strand of the aptamer carrying the Raman signal molecule to be shed, reducing the SERS signal. Based on this platform, sensitive and specific detection of the target can be accomplished within 15 min with detection limits of 0.031 pg/mL (hnRNP A1) and 0.057 pg/mL (S100P). Meanwhile, the platform was consistent with ELISA results when used to test clinical. By substituting different aptamers, this platform can provide a new solution for the rapid and sensitive detection of protein markers, which has promising applications in future disease detection.
研究领域:
生物医学工程
·
癌症研究
·
分析化学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Miao Chen,Shenghua Yao,Yongguo Yang,Fengjuan Jiang,Yan Yang,Yuexing Gu,Zhenguang Wang,Xiaowei Cao,Wei Wei
Multiplex detection of biomarkers is nontrivial for gastric cancer diagnosis. Herein, we presented a lab-on-a-chip surface-enhanced Raman scattering (LoC-SERS) sensing system for the detection of vascular endothelial growth factor (VEGF) and platelet-derived growth factor-B (PDGF-B). The sensing system includes three parallel channels, each channel consists of two detection chambers, enabling the simultaneous analysis of multiple samples. The capillary structure provides self-driving power without the need of external pumps. The ordered gold nano-bipyramids (GNBPs) array in the detection chamber can form uniform and dense “hot spots”, due to the homogeneous double-tip structure and narrow gaps, resulting in better SERS performance. During the analysis process, VEGF and PDGF-B in the serum can lead to the change of aptamer conformation. Raman reporter-labeled complementary DNA is shed from the aptamer due to competition of the target. The entire process only requires 20 min, which is rapid. By monitoring the changes in Raman intensity and fitting it with the logarithm of concentration, the correlation between the intensity and concentration can be clearly reflected as a mathematical relationship. The LoC-SERS sensing system has been verified to have excellent selectivity and reproducibility. Via the sensing system, the limits of detection (LOD) of VEGF and PDGF-B are as low as 0.342 pg/mL and 0.265 pg/mL in serum, respectively. In addition, the accuracy was verified through enzyme-linked immunosorbent assay (ELISA). Therefore, the proposed LoC-SERS sensing system has great potential for clinical detection of gastric cancer.
研究领域:
生物医学工程
·
癌症诊断
·
纳米技术
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）