Article
Chemistry, Analytical
Jinge Li, Liying Zhao, Wenbin Wang, Yanju Liu, Huaixia Yang, Jinming Kong, Fuchun Si
Summary: A novel sandwich-type electrochemical aptasensor was constructed for CEA detection, showing a wide detection range and low detection limit. PFcGE-CNTs composites prepared by ring-opening polymerization served as a platform, significantly amplifying the electrochemical signal.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Biochemistry & Molecular Biology
Cui Niu, Xiaojuan Lin, Xin Jiang, Fei Guo, Jianxiao Liu, Xiangqin Liu, Hongge Huang, Yu Huang
Summary: A novel electrochemical aptasensor based on exonuclease III and hybrid chain reaction was proposed for CEA detection, showing excellent analytical performance and great promise in early cancer screening.
BIOELECTROCHEMISTRY
(2022)
Article
Chemistry, Analytical
Yuting Zhang, Hui Li, Zongkang Guo, Xiaoli Wang, Nandi Zhou
Summary: Electrochemical aptasensors have limitations due to variations in aptamer loading densities and low signal amplification efficiency. In this study, an immobilization-free and label-free electrochemical homogeneous aptasensor was developed for CEA assay using RecJf exonuclease-mediated target cycling strategy and rolling circle amplification technology. This system eliminates the need for pre-immobilization on electrode substrates and shows good versatility and stability, as well as improved sensitivity in the homogeneous solution phase. The proposed aptasensors achieve satisfactory results in actual sample tests and have potential for commercial applications and future target platforms.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Physical
Jiaojiao Gao, Hui Liu, Kexin Wu, Jifeng Yan, Huayu Li, Ruixuan Yang, Cheng Tong, Lingyan Pang, Junqi Li
Summary: In this study, dual-functional nanoflowers Cu-NFs were prepared through a simple method and utilized to construct a sensitive colorimetric biosensor for the detection of carcinoembryonic antigen. The colorimetric sensor showed a wide linear range and low detection limit, with successful application in human serum samples, suggesting promising applications in medical diagnosis and portable detection.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Analytical
Ping Wang, Huikai Ma, Yanfeng Zhu, Wei Feng, Mengyao Su, Sanqiang Li, Hongju Mao
Summary: In this work, a novel ratiometric electrochemical aptasensor based on dual-amplification mechanism was designed. The aptasensor showed high specificity, stability, and reproducibility. Furthermore, it can be applied for the detection of other targets.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Yanan Hou, Jingdao Wang, Shantian Liu, Yuanling Sun, Yuxue Dai, Chuannan Luo, Xueying Wang
Summary: In this study, a chemiluminescence (CL) aptasensor was developed for sensitive detection of carcinoembryonic antigen (CEA). The aptasensor was constructed using magnetic carbon nanotubes (MCNTs) modified with CEA-aptamer and DNA1, and combined with flower-shaped Ag@ZIF-67 modified with DNA2 through base complementary pairing. The CL aptasensor showed high selectivity and sensitivity for CEA in human serum samples, and demonstrated potential in cancer diagnosis.
Article
Multidisciplinary Sciences
B. Chakraborty, A. Das, N. Mandal, N. Samanta, N. Das, C. Roy Chaudhuri
Summary: This study focused on enhancing mass transport of analyte towards sensor surface using an electric field in a graphene-ZnO nanorods heterostructure, aiming to improve the performance of carcinoembryonic antigen detection platform. The system achieved a detection limit of 1 fg/ml in human serum, which is three orders of magnitude lower than existing attempts on PoC devices. The results demonstrate the potential and value of this approach.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Zhenli Qiu, Dechun Fan, XiangHang Xue, Jiayi Zhang, Jiaolin Xu, Haixia Lyu, Yiting Chen
Summary: This study reports an enzyme-assisted photoelectrochemical biosensor for the quantification of exosomes using magnetic separation technology and hybridization chain reaction. The exosomes were specifically bound between aptamer-labeled magnetic beads and a cholesterol-labeled DNA anchor. The Ti3C2 MXene/CdS composites were synthesized in situ, resulting in elevated photocurrent for the quantification of exosomes. The biosensor demonstrated high sensitivity, stability, and selectivity, and has potential as a routine bioassay method for the precise quantification of exosomes from breast cancer in the future.
Article
Biochemical Research Methods
Ping Wang, Yaoyao Xie, Huikai Ma, Jiancheng Liu, Chenxiang Liu, Wei Feng, Shoumin Xi
Summary: A novel ratiometric electrochemical aptasensor was developed for the detection of carcinoembryonic antigen (CEA) using exonuclease III-assisted recycling and rolling circle amplification strategies. The proposed method successfully detected CEA in human serum samples, providing a potential platform for clinical diagnostics of CEA.
ANALYTICAL BIOCHEMISTRY
(2022)
Article
Chemistry, Analytical
Zaifa Pan, Di Yang, Jing Lin, Kang Shao, Shuxian Shi, Yuan-Jie Teng, Huijun Liu, Yuanbin She
Summary: Carcinoembryonic antigen (CEA) is an important biomarker for cancer diagnosis. A novel fluorescence aptasensor was designed using near-infrared persistent luminescence nanoparticles (PLNPs) for accurate detection of CEA in pleural effusion. The sensor effectively eliminates the interference from autofluorescence and has high accuracy and low detection limit.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Xiu-hua Wei, Xing Qiao, Jie Fan, Yuan-qiang Hao, Yin-tang Zhang, Yan-li Zhou, Mao-tian Xu
Summary: A label-free electrochemiluminescence biosensor based on CdS quantum dots and gold nanoparticles was developed for sensitive determination of carcinoembryonic antigen (CEA), with a detection limit of 8.5 x 10(-5) ng/mL. The biosensor showed good analytical performance in detecting CEA in human serum samples.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Analytical
Zahra Shekari, Hamid R. Zare, Ali Falahati
Summary: The study developed a sandwich-type electrochemical aptasensor for simultaneous detection of CEA and CA 15-3 in breast cancer using a nanocomposite biosensing substrate and probes. The redox probes of hemin and ferrocene provided electrochemical signals, and the aptasensor showed good reliability when compared to the ELISA method in analyzing clinical serum samples.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Zhenzhong Zhang, Yunxia Luan, Shaoguo Ru, Hayan Teng, Yuejiao Li, Minhao Liu, Jun Wang
Summary: This study developed an ultrasensitive electrochemical aptasensor for the detection of prometryn pollution, using highly affinitive and specific aptamer and Ag@Au nanoflowers (Ag@AuNFs) for signal amplification. The aptasensor had high sensitivity, good repeatability, and could specifically detect prometryn.
Article
Chemistry, Multidisciplinary
Yanmin Zhang, Chenfang Sun, Yuchen Duan, Shanshan Cheng, Wenping Hu
Summary: This study presents the design and fabrication of a carbon dots-functionalized organic field effect transistor for biosensing applications. By utilizing the advantages of carbon dots, low-abundance proteins were successfully detected while maintaining device performance.The experimental results demonstrate that this biosensor exhibits an extremely low limit of detection and high selectivity, highlighting its potential for early cancer detection.
Article
Chemistry, Analytical
Anabel Villalonga, Concepcion Parrado, Raul Diaz, Alfredo Sanchez, Beatriz Mayol, Paloma Martinez-Ruiz, Diana Vilela, Reynaldo Villalonga
Summary: We have developed a novel labeling strategy for electrochemical aptasensors based on enzymatic marking via supramolecular host-guest interactions. This approach utilizes a modified DNA aptamer and a covalently attached neoglycoconjugate to achieve highly selective detection of specific biomarkers.