Article
Environmental Sciences
Hongli Yang, Zaihua Zhang, Xiaohong Zhou, Norhefozge Binbr Abe Menen, Omid Rouhi
Summary: In this study, electrochemical immunosensing for monitoring carcinoembryonic antigen (CEA) was successfully achieved by immobilizing the antibody on a thionine, chitosan, or graphene oxide nanocomposite modified electrode. The resulting immunosensor showed exceptional sensitivity and selectivity towards CEA compounds, with a low detection limit of 0.8 pg/mL. The application of the immunosensor in detecting CEA in human serum samples demonstrated high accuracy and consistency with ELISA results.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Analytical
Zeinab Rahmati, Mahmoud Roushani, Hadi Hosseini
Summary: The combination of aptamer with new nanomaterials has significantly improved the performance of aptamer-based sensors. In this study, a label-free electrochemical aptasensor using N-C n-box shell with Thi for the measurement of CEA showed higher sensitivity and wider linearity from 0.1 fM to 30 nM.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Dandan Song, Jing Zheng, Nosang Myung, Jingli Xu, Min Zhang
Summary: A sandwich-type electrochemical immunosensor was developed for the detection of CEA, with excellent sensing performance and low detection limit. The magnetic assembly of nanocomposites simplifies further modification process, improving the reliability and reproducibility of the sensor.
Article
Chemistry, Analytical
Angelica Dominguez-Aragon, Erasto Armando Zaragoza-Contreras, Gabriela Figueroa-Miranda, Andreas Offenhausser, Dirk Mayer
Summary: A novel sandwich-type electrochemical immunosensor was developed for the quantitative detection of carcinoembryonic antigen, a significant tumor marker. The immobilization of antibodies was achieved through Au-S bonds using a novel photochemical technique, allowing control over antibody orientation. The SWCNH/Thi/AuNPs nanocomposite acted as a signal tag for detection and signal amplification. The immunoassay demonstrated a linear detection range from 0.001-200 ng/mL with a low detection limit of 0.1385 pg/mL. Carbon nanohorns hold promise as a conductive and binding matrix for signal amplification in clinical diagnostics.
Article
Chemistry, Analytical
Hayati Filik, Asiye Aslihan Avan, Nilay Altas Puntar, Mustafa Ozyurek, Zeynep Banu Gungor, Mine Kucur, Handan Kamis, Diclehan Ali Dicle
Summary: A sensitive sandwich-model immunoassay was designed for simultaneous electrochemical measurement of alphafetoprotein and carcinoembryonic antigen using multiple-label strategy. The immunoassay showed good linear relationship and low detection limits for both analytes. The sandwich-type immunosensor was successfully applied to real serum sample analysis.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
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.
Article
Biochemistry & Molecular Biology
Zhe Zhao, Ping Wang, Feng Tang, Yao Wang, Shujun Wang, Qing Liu, Yueyun Li
Summary: Here, an innovative sandwich-type electrochemical immunosensor based on multi-order Rubik's cube-type platinum nickel nanocubes and Au NPs/cPDA NTs was developed for ultrasensitive detection of CEA. The immunosensor exhibited a broad linear range, low detection limit, and excellent selectivity, reproducibility, and stability.
BIOELECTROCHEMISTRY
(2023)
Article
Environmental Sciences
Peng Huang, Lingzhang Meng, Jun Pang, Haiting Huang, Jing Ma, Linlin He, Parnian Amani
Summary: This study successfully developed a label-free electrochemical immunosensor based on a metal-organic framework (MOF)-graphene oxide nanocomposite for the detection of carcinoembryonic antigen (CEA), a tumor marker in lung cancer for early cancer diagnosis. The immunosensor showed improved sensitivity, stability, and selectivity, and demonstrated satisfactory accuracy in detecting CEA in human serum samples. These findings suggest that the prepared CEA immunosensor has potential for clinical applications and analysis of human fluids.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Priyanka Singh, Pranav K. Katkar, Umakant M. Patil, Raghvendra A. Bohara
Summary: This study successfully developed an immunosensor for detecting carcinoembryonic antigen by coating silver nanoparticles with silica, improving sensitivity and stability of the reaction with a detection limit of 0.01 ng/mL.
Article
Biochemical Research Methods
Maryam Jozghorbani, Mojtaba Fathi, Sayed Habib Kazemi, Navid Alinejadian
Summary: A label-free electrochemical immunosensor for detecting CEA was developed, which showed promising results for clinical screening through studying the electrochemical behavior of antibody-antigen immune complexes.
ANALYTICAL BIOCHEMISTRY
(2021)
Article
Biotechnology & Applied Microbiology
Linlin Cao, Wen Zhang, Sumei Lu, Chengjie Guo, Peijun Wang, Dantong Zhang, Wanshan Ma
Summary: In this study, a snowflake Cu2S/Pd/CuO nanocomposite was developed to construct an original label-free electrochemical immunosensor for ultrasensitive detection of CEA levels. The immunosensor showed excellent detection performance and potential value for clinical application in detecting human serum samples.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Jingxian Li, Hongfen Yang, Ren Cai, Weihong Tan
Summary: A novel sandwich-type immunosensor was developed using Pt@ SnS2 as a matrix and N,B-Eu MOFs as a signal amplifier. The immunosensor showed high sensitivity and selectivity for the detection of CEA. It exhibited excellent ECL performance and stability, making it suitable for real human serum.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Analytical
Yuan-Yuan Tan, Hong-Sheng Tan, Mingjun Liu, Shan-Shan Li
Summary: In order to prevent and diagnose carcinoembryonic antigen (CEA) at an early stage, it is necessary to develop more accurate detection methods. This study constructed a new sensitive electrochemical ratiometric immunosensor for CEA determination using chitosan-ferrocenecarboxaldehyde-gold nanospheres (ChiFc-Au) and reduced graphene oxide-Pd@Au nanocomposites-thionine (rGO-Pd@Au-Thi). The immunosensor utilized dual-signal output to generate two electrical signals (IFc and IThi) that were positively correlated with CEA concentration. Compared to other immunosensors, the proposed immunosensor exhibited a wider linear range and a lower detection limit, making it suitable for CEA measurement in human serum samples.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Biochemistry & Molecular Biology
Mengmeng Zhang, Lisha Mei, Li Zhang, Xiao Wang, Xiaochen Liao, Xiuwen Qiao, Chenglin Hong
Summary: In this study, Ti3C2 MXene anchored CuAu-LDH two-dimensional hydroxide heterojunctions were fabricated for dual-mode electrochemical immunosensors, improving sensitivity for biomarker detection and demonstrating excellent electrocatalytic activity.
BIOELECTROCHEMISTRY
(2021)
Article
Chemistry, Analytical
Jittima Choosang, Suntisak Khumngern, Natha Nontipichet, Panote Thavarungkul, Proespichaya Kanatharana, Apon Numnuam
Summary: An electrochemical immunosensor was developed using a 3D porous chitosan cryogel incorporated with poly(3,4ethylenedioxythiophene), Prussian blue, and gold nanoparticles modified screen-printed carbon electrode. The immunosensor exhibited high sensitivity, a linear range from 1.0 x 10-4 to 1.0 x 103 pg mL-1, and a detection limit of 5.05 x 10-5 pg mL-1. It also demonstrated excellent reproducibility, reusability, stability, and selectivity. Furthermore, the immunosensor successfully quantified CEA in real samples with good agreement with the immunoturbidimetry technique.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Analytical
Yujia Ying, Huilin Li
Summary: Enzymes play a crucial role as biological catalysts in accelerating biochemical reactions in living organisms. This study proposes a convenient method for monitoring enzymatic catalytic processes using native top-down mass spectrometry. By exploring the heterogeneity of the chymotrypsin sample and using tandem mass spectrometry, the researchers were able to monitor covalent and noncovalent enzymatic complexes, substrates, and products during catalysis. The results demonstrate that this method has the potential to be a promising tool for characterizing biocatalysts.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Kang Yang, Shuaibo Shi, Jinyu Wu, Shaolong Han, Shengdi Tai, Shishen Zhang, Kun Zhang
Summary: H2O and D2O are important analogues closely related to various industries and monitoring fields. This study successfully distinguishes and detects H2O and D2O by designing a novel eu(III)-macrocycle with dual emitters, Eu-2a, and conducting fluorescence titration experiments.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Julia Kuligowski, Alvaro Perez-Rubio, Marta Moreno-Torres, Polina Soluyanova, Judith Perez-Rojas, Ivan Rienda, David Perez-Guaita, Eugenia Pareja, Ramon Trullenque-Juan, Jose Castell, Marcha Verheijen, Florian Caiment, Ramiro Jover, Guillermo Quintas
Summary: This study introduces a novel variable selection approach called cluster PLS (c-PLS) to assess the joint impact of variable groups selected based on biological characteristics on the predictive performance of a multivariate model. The usefulness of c-PLS is shown using miRNomic and metabolomic datasets obtained from the analysis of liver tissue biopsies.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Meixue Lai, Lijie Zhong, Siyi Liu, Yitian Tang, Tingting Han, Huali Deng, Yu Bao, Yingming Ma, Wei Wang, Li Niu, Shiyu Gan
Summary: This study presents a method for constructing wearable sweat electrolyte sensors using carbon fiber-based solid-contact ion-selective electrodes (SC-ISEs). By using carbon fibers extracted from commercial cloth as electrode material, the cost and reproducibility issues of flexible SC-ISEs were addressed. The results showed that the carbon fiber-based SC-ISEs exhibited reversible voltammetric and stable impedance performances, and had high reproducibility of standard potentials between normal and bending states.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Ke Yang, Ying Liu, Min Deng, Peipei Wang, Dan Cheng, Songjiao Li, Longwei He
Summary: A near-infrared fluorescent probe has been developed to accurately measure the levels of peroxynitrite (ONOO-) in the endoplasmic reticulum (ER) in acute lung injury (ALI). The probe demonstrated rapid response, high selectivity, good sensitivity, and enhanced fluorescence intensity in response to ONOO-. It was successfully used to detect changes in ONOO- levels and showed significant increases in an ALI cell model and an ALI mouse model.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Yanping Wang, Yuemei Chen, Kejun Li, Jinrong Zhou, Xin Yuan, Mei Zhang, Ke Huang
Summary: In this work, a portable analytical system based on point discharge chemical vapor generation atomic emission spectrometry (PD-CVG-AES) coupling with gold filament enrichment was designed. The highly sensitive analysis of Hg2+ indirectly realized the detection of ascorbic acid (AA). The measurement is based on the fact that Ag+ can decrease the concentration of Hg2+ by forming Ag-Hg amalgam in the presence of the reductant SnCl2, while AA can pre-reduce Ag+ to Ag0, leading to the generation of silver nanoparticles (Ag NPs). The developed novel analytical strategy broadens the application of microplasma-based AES and offers a higher level of sensitivity compared to current AA detection techniques.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Yundi Huang, Bo Song, Kaiwen Chen, Deshu Kong, Jingli Yuan
Summary: This study developed two lysosome-targetable background-free TGL probes for efficient and accurate detection of 1O2, which can be used for monitoring endogenous 1O2 concentrations in lysosomes and discriminating variability induced by different photosensitizers. Furthermore, a smart luminescent sensor film was successfully prepared for on-site 1O2 production detection during PDT processes, offering a promising clinical monitoring tool for skin diseases.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Wei Lang, Jia-Mei Qin, Qian-Yong Cao
Summary: A novel polymer-based probe P1 was successfully synthesized for fluorescently ratiometric sensing of H2S with high selectivity and sensitivity. A smartphone sensing platform was constructed to conduct visual quantitative detection of H2S. P1 can be employed in evaluating the level fluctuations of H2S in living cells, testing water samples/wine samples, and monitoring food freshness.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Yuanyuan Qin, Shuda Liu, Shuyun Meng, Dong Liu, Tianyan You
Summary: The study developed a split aptamer-based sandwich-type ratiometric biosensor for the detection of 17 beta-estradiol (E2) using photoelectrochemical and electrochemical assays. The biosensor utilized split aptamer fragments to recognize E2 and trigger a hybridization chain reaction, resulting in the production of double-stranded DNA labeled with CdTe quantum dots. This DNA complex was able to sensitize CdTe quantum dots and generate response signals for E2 detection. The developed biosensor demonstrated high sensitivity and accuracy with two linear ranges and low detection limits.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Siriwan Teepoo, Jongjit Jantra, Khaunnapa Panapong, David Taiwo Ajayi
Summary: A novel immunochromatographic assay based on hyperbranched Au plasmonic blackbodies with a smartphone readout was developed for rapid and sensitive detection of leucomalachite green residues in fish and shrimp products.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Andrea L. Larraga-Urdaz, Borja Moreira-Alvarez, Jorge Ruiz Encinar, Jose M. Costa-Fernandez, Maria Luisa Fernandez-Sanchez
Summary: A major challenge in the 21st century is the development of point-of-care diagnostic tools. In this study, a highly sensitive and simple bioassay using AuNPs and MNAzymes was developed for rapid detection and quantification of miRNA-4739. The proposed strategy shows potential for breast cancer diagnosis.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Xiaohan Zhao, Anyu Wang, Lingzi Zhai, Jiuhe Gao, Sizhe Lyu, Yingshan Jiang, Tian Zhong, Ying Xiao, Xi Yu
Summary: A novel method using polystyrene-coated magnetic nanoparticles for extracting monohydroxy polycyclic aromatic hydrocarbons from urine samples was investigated. The proposed method is simple, sensitive, and efficient, with desirable sensitivity for analyzing low-abundance metabolites in large volumes of complex urine samples.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Ke Quan, Yuqing Zeng, Wenke Zhang, Fengfeng Li, Mengjiao Li, Zhihe Qing, Linlin Wu
Summary: In this study, a visual and reusable biosensor was developed for detecting substrates that are closely associated with human physiological health. The immobilized oxidase showed higher stability and sensitivity under harsh conditions, enabling reliable detection of substrates in complex fluids.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Dongjuan Wang, Xiuqian Ding, Jinling Xie, Juan Wang, Guanhao Li, Xin Zhou
Summary: In this study, a three-in-one sensor was developed for real-time detection of biogenic amines (BAs) with high sensitivity and selectivity. The sensor showed multimodal responses and could be used to fabricate portable devices for on-site non-destructive assessment of food spoilage indicators.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Jinting Meng, Zihao Xu, Shasha Zheng, Hongqun Yang, Tianfu Wang, Hong Wang, Yingwei Zhang
Summary: This study demonstrates the development of a cascade signal amplification system using a multi-pedal DNA walker and strand displacement reactions for the electrochemical detection of miRNA-155. The biosensor exhibited high sensitivity, selectivity, and the potential for clinical applications.
ANALYTICA CHIMICA ACTA
(2024)