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Zeng X, Wu C, Xiong Y, Zhan Z, Shen C, Lin F, Zhang J, Chen P. Target proteins-regulated DNA nanomachine-electroactive substance complexes enable separation-free electrochemical detection of clinical exosome. Biosens Bioelectron 2024; 256:116273. [PMID: 38621341 DOI: 10.1016/j.bios.2024.116273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 03/20/2024] [Accepted: 04/03/2024] [Indexed: 04/17/2024]
Abstract
Simple and reliable profiling of tumor-derived exosomes (TDEs) holds significant promise for the early detection of cancer. Nonetheless, this remains challenging owing to the substantial heterogeneity and low concentration of TDEs. Herein, we devised an accurate and highly sensitive electrochemical sensing strategy for TDEs via simultaneously targeting exosomal mucin 1 (MUC1) and programmed cell death ligand 1 (PD-L1). This approach employs high-affinity aptamers as specific recognition elements, utilizes rolling circle amplification and DNA nanospheres as effective bridges and signal amplifiers, and leverages methylene blue (MB) and doxorubicin (DOX) as robust signal reporters. The crux of this separation- and label-free method is the specific response of MB and DOX to G-quadruplex structures and DNA nanospheres, respectively. Quantifying TDEs using this strategy enabled precise discrimination of lung cancer patients (n = 25) from healthy donors (n = 12), showing 100% specificity (12/12), 92% sensitivity (23/25), and an overall accuracy of 94.6% (35/37), with an area under the receiver operating characteristic curve (AUC) of 0.97. Furthermore, the assay results strongly correlated with findings from computerized tomography and pathological analyses. Our approach could facilitate the early diagnosis of lung cancer through TDEs-based liquid biopsy.
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Affiliation(s)
- Xianghu Zeng
- Department of Laboratory Medicine, Department of Thoracic Surgery, Med+X Center for Manufacturing, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Chengyong Wu
- Department of Laboratory Medicine, Department of Thoracic Surgery, Med+X Center for Manufacturing, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Ying Xiong
- Department of Laboratory Medicine, Department of Thoracic Surgery, Med+X Center for Manufacturing, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Zixuan Zhan
- Department of Laboratory Medicine, Department of Thoracic Surgery, Med+X Center for Manufacturing, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Congcong Shen
- Department of Laboratory Medicine, Department of Thoracic Surgery, Med+X Center for Manufacturing, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Feng Lin
- Department of Laboratory Medicine, Department of Thoracic Surgery, Med+X Center for Manufacturing, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.
| | - Junlong Zhang
- Department of Laboratory Medicine, Department of Thoracic Surgery, Med+X Center for Manufacturing, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.
| | - Piaopiao Chen
- Department of Laboratory Medicine, Department of Thoracic Surgery, Med+X Center for Manufacturing, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.
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Liu C, Shen X, Yan L, Qu R, Wang Y, He Y, Zhan Z, Chen P, Lin F. Controllable self-assembled DNA nanomachine enable homogeneous rapid electrochemical one-pot assay of lung cancer circulating tumor cells. Biosens Bioelectron 2024; 246:115865. [PMID: 38035517 DOI: 10.1016/j.bios.2023.115865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 11/17/2023] [Accepted: 11/18/2023] [Indexed: 12/02/2023]
Abstract
A homogeneous rapid (45 min) one-pot electrochemical (EC) aptasensor was established to quantitatively detect circulating tumor cells (CTCs) in lung cancer patients using mucin 1 as a marker. The core of this study is that the three single-stranded DNA (Y1, Y2, and Y3) could be hybridized to form Y-shaped DNA (Y-DNA) and further self-assemble to form DNA nanosphere. The aptamer of mucin 1 could be complementary and paired with Y1, thus disrupting the conformation of the DNA nanosphere. When mucin 1 was present, the aptamer combined specifically with mucin 1, thus preserving the DNA nanosphere structure. Methylene blue (MB) acted as a signal reporter, which could be embedded between two base pairs in the DNA nanosphere to form a DNA nanosphere-MB complex, reducing free MB and resulting in a lower electrochemical signal. The results demonstrated that the linear ranges for mucin 1 and A549 cells were 1 ag/mL-1 fg/mL and 1-100 cells/mL, respectively, with minimum detectable concentrations were 1 ag/mL and 1 cell/mL, respectively. The quantitative analysis of CTCs in 44 clinical blood samples was performed, and the results were consistent with the computerized tomography (CT) images, pathological findings and folate receptor-polymerase chain reaction (FR-PCR) kits. The receiver operating characteristic (ROC) curve exhibited an area under the curve (AUC) value of 0.970. The assay revealed 100% specificity and 94.1% sensitivity. It is believed that this electrochemical aptasensor could provide a new approach to detect CTCs.
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Affiliation(s)
- Chengxin Liu
- Department of Thoracic Surgery, Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Xu Shen
- Department of Thoracic Surgery, Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Li Yan
- Department of Thoracic Surgery, Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Runlian Qu
- Department of Thoracic Surgery, Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Yue Wang
- Department of Thoracic Surgery, Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Yaqin He
- Department of Thoracic Surgery, Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Zixuan Zhan
- Department of Thoracic Surgery, Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Piaopiao Chen
- Department of Thoracic Surgery, Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.
| | - Feng Lin
- Department of Thoracic Surgery, Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.
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3
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Hu Q, Tang D, Li M, Liang X, Zhou J, Meng Y, Wei Y, Yan S, Lin R, Niu X, Zhang L. Hybrid chain reaction and selective recognition-based homogeneous dual-fluorescence analysis of circulating tumor cells in clinical ovarian cancer samples. Anal Chim Acta 2023; 1281:341877. [PMID: 38783734 DOI: 10.1016/j.aca.2023.341877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/03/2023] [Accepted: 10/04/2023] [Indexed: 05/25/2024]
Abstract
BACKGROUND Oncological analysis is important in tumor diagnosis. We constructed a dual-fluorescence and binary visual analysis system for circulating tumor cells (CTCs) using the folate receptor as a biomarker, combined with hybridization chain reaction and nanomaterial amplification. This strategy integrates terminal protection, selective recognition properties of N-methyl mesoporphyrin IX and CdTe quantum dots for Cu2+ and double-stranded templated copper nanoparticles, and inkjet printing technology. RESULTS In fluorescence mode, folate receptor and A2780 ovarian cancer cells were specifically detected with a limit of detection of 0.1 fg mL-1, and 10 cells mL-1 were observed. The detection limits of both the color and distance reading modes were comparable to those obtained in fluorescence mode. The applicability of the method for quantifying CTCs was validated using 27 (6 negative and 21 positive) clinical ovarian cancer samples; the results agreed with those of both the clinical folate receptor-polymerase chain reaction kit and radiological and pathological results. SIGNIFICANCE This dual-fluorescence and binary visual CTCs detection method provides multiple options for clinical tumor liquid biopsy.
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Affiliation(s)
- Qian Hu
- Laboratory of Molecular Translational Medicine, Centre for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Clinical Research Center for Birth Defects of Sichuan Province, West China Second Hospital, Sichuan University, Chengdu, Sichuan, 610041, China; Department of Gynecology and Obstetrics, West China Second Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Dan Tang
- Laboratory of Molecular Translational Medicine, Centre for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Clinical Research Center for Birth Defects of Sichuan Province, West China Second Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Mei Li
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Xiaodu Liang
- Department of Gynecology and Obstetrics, West China Second Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Juan Zhou
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Yanming Meng
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Yinhao Wei
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center, No.17 Renmin South Road Section Three, Chengdu, 610041, Sichuan, China
| | - Shixin Yan
- Sichuan University, Chengdu, Sichuan, 610041, China
| | - Ruoyu Lin
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Xiaoyu Niu
- Department of Gynecology and Obstetrics, West China Second Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.
| | - Lin Zhang
- Laboratory of Molecular Translational Medicine, Centre for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Clinical Research Center for Birth Defects of Sichuan Province, West China Second Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.
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Wang Y, Chen X, Shen X, He Y, Zhan Z, Liu C, Xie Y, Lin F, Huang K, Chen P. Simplified Rapid Enrichment of CTCs and Selective Recognition Prereduction Enable a Homogeneous ICP-MS Liquid Biopsy Strategy of Lung Cancer. Anal Chem 2023; 95:14244-14252. [PMID: 37705297 DOI: 10.1021/acs.analchem.3c02302] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
The effective enrichment and hypersensitivity analysis of circulating tumor cells (CTCs) in clinical whole blood samples are highly significant for clinical tumor liquid biopsy. In this study, we established an easy operation and affordable CTCs extraction technique while simultaneously performing the homogeneous inductively coupled plasma mass spectrometry (ICP-MS) determination of CTCs in lung cancer clinical samples based on selective recognition reactions and prereduction phenomena. Our strategy allowed for the pretreatment of whole blood samples in less than 45 min after step-by-step centrifugation, which only required lymphocyte separation solution and erythrocyte lysate. Furthermore, a three-stage signal amplification system consisting of catalytic hairpin assembly (CHA), selective recognition for C-Ag+-C structures and Ag+ of copper sulfide nanoparticles (CuS NPs), and prereduction of Hg2+ through ascorbic acid (AA) was constructed by using mucin 1 as the CTCs marker and the aptamer for identification probes. In optimal conditions, the detection limits of ICP-MS were as low as 0.3 ag/mL for mucin 1 and 0.25 cells/mL for A549 cells. This method analyzed CTCs in 58 clinical samples quantitatively, and the results were consistent with clinical CT images and pathological findings. The area under the curve (AUC) value of the receiver operating characteristic (ROC) curve was 0.957, which provided a specificity of 100% and a sensitivity of 91.5% for the assay. Therefore, the simplicity of the extraction method, the accessibility, and the high sensitivity of the assay method make the strategies attractive for clinical CTCs testing applications.
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Affiliation(s)
- Yue Wang
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Thoracic Surgery, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Xin Chen
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Xu Shen
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Thoracic Surgery, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yaqin He
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Thoracic Surgery, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Zixuan Zhan
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Thoracic Surgery, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Chengxin Liu
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Thoracic Surgery, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yi Xie
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Thoracic Surgery, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Feng Lin
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Thoracic Surgery, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Ke Huang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Piaopiao Chen
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Thoracic Surgery, Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
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5
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Ou X, Wan Z, Xiong Y, Huang K, Wei Z, Nuermaimaiti Z, Chen Y, Yiliya D, Lin H, Dai Z, Li Y, Chen P. Homogeneous Dual Fluorescence Count of CD4 in Clinical HIV-Positive Samples via Parallel Catalytic Hairpin Assembly and Multiple Recognitions. ACS APPLIED MATERIALS & INTERFACES 2023; 15:38285-38293. [PMID: 37526600 DOI: 10.1021/acsami.3c06742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Regularly measuring the level of CD4+ cells is necessary for monitoring progression and predicting prognosis in patients suffering from an infection with the human immunodeficiency virus (HIV). However, the current flow cytometry standard detection method is expensive and complicated. A parallel catalytic hairpin assembly (CHA)-assisted fluorescent aptasensor is reported for homogeneous CD4 count by targeting the CD4 protein expressed on the membrane of CD4+ cells. Detection was achieved using CdTe quantum dots (QDs) and methylene blue (MB) as signal reporters. CdTe QDs distinguished CHA-assisted release of Ag+ and C-Ag+-C and MB that has differentiated cytosine (C)-rich single-stranded DNA (ssDNA) and C-Ag+-C, generating changes in fluorescence intensity. With the assistance of the CHA strategy and luminescent nanomaterials, this method reached limits of detection of 0.03 fg/mL for the CD4 protein and 0.3 cells/mL for CD4+ cells with linear ranges of 0.1 to 100 fg/mL and 1 to 1000 cells/mL, respectively. The method was validated in 50 clinical whole blood samples consisting of 30 HIV-positive patients, 10 healthy volunteers, and 10 patients with cancer or other chronic infections. The findings from this method were in good agreement with the data from clinical flow cytometry. Due to its sensitivity, affordability, and ease of operation, the current method has demonstrated great potential for routine CD4 counts for the management of HIV, especially in communities and remote areas.
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Affiliation(s)
- Xiaoqi Ou
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Urology, National Clinical Research Center for Geriatrics, Core Facilities of West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Zhengli Wan
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Urology, National Clinical Research Center for Geriatrics, Core Facilities of West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Ying Xiong
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Urology, National Clinical Research Center for Geriatrics, Core Facilities of West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Ke Huang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Zeliang Wei
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Urology, National Clinical Research Center for Geriatrics, Core Facilities of West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Zulimire Nuermaimaiti
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Urology, National Clinical Research Center for Geriatrics, Core Facilities of West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yanting Chen
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Urology, National Clinical Research Center for Geriatrics, Core Facilities of West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Duerdanna Yiliya
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Urology, National Clinical Research Center for Geriatrics, Core Facilities of West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Hongyin Lin
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Urology, National Clinical Research Center for Geriatrics, Core Facilities of West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Zhenjie Dai
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Urology, National Clinical Research Center for Geriatrics, Core Facilities of West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yi Li
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Urology, National Clinical Research Center for Geriatrics, Core Facilities of West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Piaopiao Chen
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Urology, National Clinical Research Center for Geriatrics, Core Facilities of West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
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6
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Zhang P, Xiong C, Liu Z, Chen H, Li S. CsPbBr3 nanocrystals as luminescent probe for in situ detection of chloride and iodide ions in water. Microchem J 2023. [DOI: 10.1016/j.microc.2023.108651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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7
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Xiong Y, Zeng X, Yan L, Wang Y, Lin Y, Ao K, Feng P, Xie Y, Chen P. Target Enzyme-Triggered Click Chemistry and Hybridization Chain Reaction for Fluorescence Nonculture Homogeneous Analysis of E. coli in Bloodstream Infections. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37262009 DOI: 10.1021/acsami.3c04065] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Escherichia coli is the major pathogen that causes bloodstream infections (BSI). It is critical to develop nonculture identification methods which can meet the urgent need of clinical diagnosis and treatment. In this study, we reported a homogeneous fluorescence E. coli analysis system using β-galactosidase (β-Gal) as the biomarker and double-stranded DNA-templated copper nanoparticles (dsDNA-Cu NPs) as the signal output. The product of the enzymatic hydrolysis reaction, p-aminophenol (PAP), could reduce Cu2+ to Cu+, triggering the alkyne-azido cycloaddition reaction (CuAAC). Subsequently, the hybrid chain reaction (HCR) was initiated, producing the dsDNA template used to generate Cu NPs in situ. The system achieved a wide linear range for β-Gal and E. coli 1-104 mU/L and 10-2-10 colony-forming unit (CFU)/mL, and a detection limit of 0.3 mU/L and 0.003 CFU/mL, respectively. 65 samples (45 blood and 20 urine) were collected to evaluate the clinical practicality. The results demonstrated remarkable area under the curve (AUC) values of 0.95 and 0.916 from uncultured urine and blood, respectively. It had 100% specificity and 83.3% sensitivity. The whole duration of the strategy was 3.5 h, which significantly reduced the turnaround time (TAT) and facilitated early BSI diagnosis to improve patients' prognosis. Our work had the potential to be an alternative to culture-based methods in clinics.
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Affiliation(s)
- Ying Xiong
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Xianghu Zeng
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Li Yan
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yue Wang
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yuling Lin
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Keping Ao
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Pan Feng
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yi Xie
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Piaopiao Chen
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
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8
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Jiang P, Bai Y, Yan L, Feng P, Huang K, Chen J, Chen P. Nanoarchitectonics-Assisted Simultaneous Fluorescence Detection of Urinary Dual miRNAs for Noninvasive Diagnosis of Prostate Cancer. Anal Chem 2023; 95:7676-7684. [PMID: 37129316 DOI: 10.1021/acs.analchem.3c00701] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Herein, we report a fluorescence strategy for the homogeneous and simultaneous analysis of urine miRNA-375 and miRNA-148a. The target miRNAs in urine bonded the devised dumbbell-shaped "C-Ag+-C" and "T-Hg2+-T" hairpin structures that could trigger cascade enzyme-free amplification. Then, the fluorescent CdTe quantum dots (QDs) and carbon dots (CDs) could selectively recognize Ag+ and Hg2+, to quantify the dual miRNAs concurrently. Under optimized conditions, the linear range was from 0.1 to 1000 fM and the limits of detection (LOD) for dual miRNAs reached 30 and 25 aM, respectively. The practicality was further evaluated with 45 clinical urine samples including prostate cancer (PC) and other patients, and the results were consistent with the clinical polymerase chain reaction (PCR) kit and ultrasonic and pathological findings. The receiver operating characteristic (ROC) curve analysis showed that the estimates of the area under the curve (AUC) were 0.739 for the serum prostate-specific antigen (PSA) and 0.941 for miRNA-375 and 0.946 for miRNA-148a. The sensitivity and specificity reached 75 and 100% for miRNA-375 and 71 and 94% for miRNA-148a, respectively, which was better than serum PSA. This strategy constructed a reliable system for dual miRNA detection in urine samples and proposed new insights into the rapid and noninvasive diagnosis of PC.
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Affiliation(s)
- Pengjun Jiang
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Institute of Urology, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yunjin Bai
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Institute of Urology, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Li Yan
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Institute of Urology, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Pan Feng
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Institute of Urology, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Ke Huang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Jie Chen
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Institute of Urology, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Piaopiao Chen
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Institute of Urology, Out-Patient Department, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
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9
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Chen P, Meng Y, Liu T, Peng W, Gao Y, He Y, Qu R, Zhang C, Hu W, Ying B. Sensitive Urine Immunoassay for Visualization of Lipoarabinomannan for Noninvasive Tuberculosis Diagnosis. ACS NANO 2023; 17:6998-7006. [PMID: 37010068 DOI: 10.1021/acsnano.3c01374] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Lipoarabinomannan (LAM) is a prospective noninvasive biomarker for tuberculosis (TB) diagnosis. Here, we report a visual immunoassay of high sensitivity for detecting LAM in urine samples toward TB diagnosis. This method uses a DNA-linked immunosorbent of LAM, followed by a transduction cascade into amplified visual signals using quantum dots (QDs) and calcein reaction with Cu2+ and copper nanoparticles (Cu NPs). The limit of detection (LOD) for LAM in the urine reaches 2.5 fg/mL and 25 fg/mL using a fluorometer and length readouts on strips, respectively, demonstrating an ultrahigh sensitivity. The clinical validation of the proposed assay was performed with 147 HIV-negative clinical urine specimens. The results show the sensitivity of test is 94.1% (16/17) for confirmed TB (culture-positive) and 85% (51/60) for unconfirmed TB (clinical diagnosis without positive culture results), respectively, when the test cutoff value is 40 fg/mL for TB. Its specificity is 89.2% (25/28) in non-TB and nontuberculous mycobacterial patients. The area under the curve (AUC) was 0.86 when controls were non-TB and LTBI patients, while the AUC was 0.92 when controls were only non-TB patients. This highly sensitive visual immunoassay of LAM has shown potential for noninvasive diagnosis of TB using urine samples.
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Affiliation(s)
- Piaopiao Chen
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yanming Meng
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Tangyuheng Liu
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Wu Peng
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yue Gao
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yaqin He
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Runlian Qu
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Chunying Zhang
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Walter Hu
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Binwu Ying
- Department of Laboratory Medicine, Med+X Center for Manufacturing, Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
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10
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Chen P, Cen L, Wang Y, Bai Y, Shi T, Chen X. Rapid binary visual detection of oxalate in urine samples of urolithiasis patients via competitive recognition and distance reading test strips. J Mater Chem B 2023; 11:2530-2537. [PMID: 36853266 DOI: 10.1039/d2tb02666j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Urolithiasis is a common disease with wide ranging effects, with oxalate stones being the most prevalent type. Existing clinical diagnostic methods rely on complex instruments and professionals, are difficult to distinguish between stone types, and have insufficient sensitivity. Moreover, high-sensitivity point-of-care testing (POCT) methods remain scarce. We constructed a rapid homogeneous dual fluorescence and binary visualization analysis system to diagnose oxalate urolithiasis because oxalate can efficiently reduce Cu2+ to Cu+, which can be selectively competitively recognized by both calcein and cadmium telluride quantum dots (CdTe QDs). Under optimized conditions, the system exhibited high sensitivity to oxalate ranging from 10 pM to 10 nM within 3 min. Following that, visualized test strips of calcein and QDs were generated by inkjet printing; oxalate concentrations as low as 10 nM can be easily identified by reading the quenching distance on the strip. We then analyzed 66 clinical urine samples: 11 healthy, 10 oxalate-negative, and 45 oxalate-positive samples. The fluorescence and visual mode results were highly consistent with clinical computed tomography (CT) images and clinical diagnostics. Therefore, our analysis strategy has the potential to use POCT for the assessment of oxalate urolithiasis.
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Affiliation(s)
- Piaopiao Chen
- Department of Laboratory Medicine, Med + X Center for Manufacturing, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.
| | - Lihang Cen
- Department of Clinical Laboratory, Liuzhou Key Laboratory of Molecular Diagnosis, Guangxi Key Laboratory of Molecular Diagnosis and Application, Affiliated Liutie Central Hospital of Guangxi Medical University, Liuzhou, Guangxi, 545007, China
| | - Yue Wang
- Department of Laboratory Medicine, Med + X Center for Manufacturing, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.
| | - Yunjin Bai
- Department of Laboratory Medicine, Med + X Center for Manufacturing, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.
| | - Tian Shi
- Department of Laboratory Medicine, Med + X Center for Manufacturing, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.
| | - Xianhua Chen
- Department of Clinical Laboratory, Liuzhou Key Laboratory of Molecular Diagnosis, Guangxi Key Laboratory of Molecular Diagnosis and Application, Affiliated Liutie Central Hospital of Guangxi Medical University, Liuzhou, Guangxi, 545007, China
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11
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Yang H, Li K, Wang Y, Yuan X, Zhang M. A label-free strategy for H2O2 assay by chemical vapor generation-atomic fluorescence spectrometry. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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12
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Fu YB, Wen QL, Ding HT, Yang N, Chai XY, Zhang Y, Ling J, Shi YG, Cao Q. Green and simple synthesis of NH2-functionalized CsPbBr3 perovskite nanocrystals for detection of iodide ion. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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13
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Jiang X, Bai Y, Liu Q, Yan L, Long T, Li M, Huang J, Ying B, Chen P. Three-fluorescence sensor for minute-time scale low-cost analysis of urinary oxalate in urolithiasis metabolic assessment. Anal Chim Acta 2022; 1237:340586. [DOI: 10.1016/j.aca.2022.340586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/18/2022] [Accepted: 11/01/2022] [Indexed: 11/08/2022]
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14
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Chen P, Peng W, Qu R, He Y, Liu T, Huang J, Ying B. Fluorescence Aptasensor of Tuberculosis Interferon-γ in Clinical Samples Regulated by Steric Hindrance and Selective Identification. Anal Chem 2022; 94:9122-9129. [PMID: 35694824 DOI: 10.1021/acs.analchem.2c01530] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Although there are many interferon gamma (IFN-γ)-based tools for tuberculosis (TB) diagnosis, they are less sensitive and laborious. Here, we developed an IFN-γ aptasensor using pyrophosphate-cerium coordination polymeric nanoparticles (PPi-Ce CPNs) as signal reporters and a double-stranded DNA as a probe. The sensor was realized by sterically regulating the polymerization elongation of terminal deoxynucleotidyl transferase (TdT) and the selective recognition reaction of PPi-Ce CPNs. This method employs PPi-Ce CPNs to selectively identify Cu2+ and polyT-templated copper nanoparticles (Cu NPs), as well as a TdT-assisted amplification technique. Our data showed that under optimized experimental conditions, a limit of detection of as low as 0.25 fg/mL was achieved, with a linear range of 1-100 fg/mL, and a good target protein specificity. The detection sensitivity was an order of magnitude higher than that observed with Cu NPs when used as signal reporters. This IFN-γ quantification technique was further validated in clinical samples using 57 clinical TB patients (22 negative and 35 positive). Our findings agreed with those from enzyme-linked immunosorbent assay, GeneXpert MTB/rifampin assay, and polymerase chain reaction detection of TB-DNA and those from clinical imaging techniques. Therefore, our analytical system may provide an additional and more sensitive tool for the early diagnosis of TB.
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Affiliation(s)
- Piaopiao Chen
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Wu Peng
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Runlian Qu
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yaqin He
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Tangyuheng Liu
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Jin Huang
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Binwu Ying
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
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15
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Chen P, Jiang P, Lin Q, Zeng X, Liu T, Li M, Yuan Y, Song S, Zhang J, Huang J, Ying B, Chen J. Simultaneous Homogeneous Fluorescence Detection of AFP and GPC3 in Hepatocellular Carcinoma Clinical Samples Assisted by Enzyme-Free Catalytic Hairpin Assembly. ACS APPLIED MATERIALS & INTERFACES 2022; 14:28697-28705. [PMID: 35699181 DOI: 10.1021/acsami.2c09135] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Simultaneous sensitive and cost-effective detection of multiple tumor markers has shown great potential for cancer diagnostics. Herein, we reported a simple enzyme-free parallel catalytic hairpin assembly (CHA) amplification strategy with N-methyl mesoporphyrin IX (NMM) and quantum dots (QDs) as signal reporters for the homogeneous fluorescent simultaneous detection of alpha-fetoprotein (AFP) and glypican-3 (GPC3). Upon selective binding, the released single-stranded DNA (ssDNA) from the two-aptamer double-stranded DNA (dsDNA) probes triggers CHA amplification, further releasing the G-quadruplex sequence and Ag+ from the C-Ag+-C structures at the same time. Then, NMM and CdTe QDs selectively recognize G-quadruplex and Ag+, respectively. Under optimized conditions, limits of detections (LODs) as low as 3 fg/mL for AFP and 0.25 fg/mL for GPC3 were achieved using fluorescence readout. Using color- and distance-based visual readouts, an LOD of 1 fg/mL for GPC3 was reached. This method was applied to quantitatively analyze AFP and GPC3 in 41 clinical serum samples of hepatocellular carcinoma (HCC) patients. The quantitative test results for AFP and GPC3 were consistent with those obtained using the electrochemiluminescence immunoassay (ECL-IA) clinical kit and correlated with radiological and pathological findings. The results of clinical tests demonstrated the potential of GPC3 as a tumor biomarker, and we propose a cut-off value of 2 ng/mL GPC3 for HCC.
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Affiliation(s)
- Piaopiao Chen
- Department of Laboratory Medicine, Med+X Center for Manufacturing Department of Radiology, Department of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Pengjun Jiang
- Department of Laboratory Medicine, Med+X Center for Manufacturing Department of Radiology, Department of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Qianli Lin
- Department of Laboratory Medicine, Med+X Center for Manufacturing Department of Radiology, Department of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Xianghu Zeng
- Department of Laboratory Medicine, Med+X Center for Manufacturing Department of Radiology, Department of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Tangyuheng Liu
- Department of Laboratory Medicine, Med+X Center for Manufacturing Department of Radiology, Department of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Mei Li
- Department of Laboratory Medicine, Med+X Center for Manufacturing Department of Radiology, Department of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yuan Yuan
- Department of Laboratory Medicine, Med+X Center for Manufacturing Department of Radiology, Department of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Siyang Song
- Department of Laboratory Medicine, Med+X Center for Manufacturing Department of Radiology, Department of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Junlong Zhang
- Department of Laboratory Medicine, Med+X Center for Manufacturing Department of Radiology, Department of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Jin Huang
- Department of Laboratory Medicine, Med+X Center for Manufacturing Department of Radiology, Department of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Binwu Ying
- Department of Laboratory Medicine, Med+X Center for Manufacturing Department of Radiology, Department of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Jie Chen
- Department of Laboratory Medicine, Med+X Center for Manufacturing Department of Radiology, Department of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
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16
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Rational design of an allosteric G-quadruplex aptamer probe for ultra-sensitive detection of melamine in milk. Int J Biol Macromol 2022; 210:430-438. [PMID: 35500779 DOI: 10.1016/j.ijbiomac.2022.04.198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 04/25/2022] [Accepted: 04/26/2022] [Indexed: 11/22/2022]
Abstract
Efficient and accurate detection of melamine in dairy products remains a crucial yet challenging task. Herein, an allosterically modulated G-quadruplex-integrated aptamer is rationally designed with thymine-rich recognition termini for melamine binding. The detection process is facile by simply introducing the analyte into the mixture consisting of G-quadruplex aptamer probes, exonuclease III, and thioflavin T (ThT). The detection feasibility is confirmed by the polyacrylamide gel electrophoresis and fluorescence measurement results. This exonuclease III-assisted signal amplifiable approach works well in a linear range from 0.1 nM to 0.1 μM. Moreover, a detection limit as low as 83 pM is easily achieved, which is almost five orders of magnitude smaller than the maximum allowable melamine levels (about 8 μM) defined by many countries all over the world. The whole assay time for each test is no longer than 1 h. Additionally, the scheme is highly specific and satisfactory recovery rates (from 91% to 104%) are readily obtained when challenged with melamine-spiked milk samples. Therefore, the label-free, turn-on, low-cost, and time-efficient method can be used for reliable detection of melamine in an easily manipulated and ultra-sensitive manner, which may find its utilization in the field of food safety, biomedical engineering, and clinical diagnosis.
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17
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Chen P, He Y, Liu T, Li F, Huang K, Tang D, Jiang P, Wang S, Zhou J, Huang J, Xie Y, Wei Y, Chen J, Hu W, Ying B. Homogeneous two-dimensional visual and fluorescence analysis of circulating tumor cells in clinical samples via steric hindrance regulated enzymes recognition cleavage and elongation. Biosens Bioelectron 2022; 202:114009. [DOI: 10.1016/j.bios.2022.114009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/11/2022] [Accepted: 01/14/2022] [Indexed: 12/11/2022]
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18
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Chen P, Bai Y, Tang S, Wang N, He Y, Huang K, Huang J, Ying B, Cao Y. Homogeneous Binary Visual and Fluorescence Detection of Tetanus Toxoid in Clinical Samples Based on Enzyme-Free Parallel Hybrid Chain Reaction. NANO LETTERS 2022; 22:1710-1717. [PMID: 35119287 DOI: 10.1021/acs.nanolett.1c04818] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Here, we report a simple aptamer-based toxoid test with both fluorescence and binary visual readouts. This test is established based on our recent finding that CdTe quantum dots could differentiate DNA templated Cu NPs from Cu2+. Through the further integration with enzyme-free triple parallel hybridization chain reaction, cation exchange reaction, and inkjet printing, we demonstrated specific detection of tetanus toxoid with a limit-of-detection (LOD) of 0.25 fg/mL using fluorescence readout. Using color- and distance-based binary visual readouts, we were able to achieve LODs of 10 fg/mL and 1 fg/mL, respectively. The quantitative test results for tetanus toxoid using both fluorescence and visual readouts were successfully validated in 84 clinical serum samples. Moreover, our strategy also enabled accurate monitoring of tetanus toxoid levels in patients before and after drug treatment. On the basis of our clinical test results, we recommend a cutoff value of 5 fg/mL for tetanus infection.
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Affiliation(s)
- Piaopiao Chen
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Precision Medicine Industrial Technology Institute, Department of Urology, Department of Emergency Medicine, Laboratory of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yunjin Bai
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Precision Medicine Industrial Technology Institute, Department of Urology, Department of Emergency Medicine, Laboratory of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Shiyuan Tang
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Precision Medicine Industrial Technology Institute, Department of Urology, Department of Emergency Medicine, Laboratory of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.,Disaster Medical Center, Sichuan University, Chengdu, Sichuan 610041, China
| | - Nian Wang
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Precision Medicine Industrial Technology Institute, Department of Urology, Department of Emergency Medicine, Laboratory of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yaqin He
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Precision Medicine Industrial Technology Institute, Department of Urology, Department of Emergency Medicine, Laboratory of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Ke Huang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Jin Huang
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Precision Medicine Industrial Technology Institute, Department of Urology, Department of Emergency Medicine, Laboratory of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Binwu Ying
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Precision Medicine Industrial Technology Institute, Department of Urology, Department of Emergency Medicine, Laboratory of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yu Cao
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Precision Medicine Industrial Technology Institute, Department of Urology, Department of Emergency Medicine, Laboratory of Emergency Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.,Disaster Medical Center, Sichuan University, Chengdu, Sichuan 610041, China
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19
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Li K, Yang H, Yuan X, Zhang M. A novel and indirect method for L-cysteine detection in traditional Chinese medicines by chemical vapor generation-atomic fluorescence spectrometry. Microchem J 2022. [DOI: 10.1016/j.microc.2021.106891] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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20
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Tang Z, Wei Z, Huang K, Wei Y, Li D, Yan S, Huang J, Geng J, Tao C, Chen P, Ying B. Fluorescence and visual immunoassay of HIV-1 p24 antigen in clinical samples via multiple selective recognitions of CdTe QDs. Mikrochim Acta 2021; 188:422. [PMID: 34791532 DOI: 10.1007/s00604-021-05075-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 10/19/2021] [Indexed: 02/05/2023]
Abstract
Human immunodeficiency virus (HIV) infection inflicts significant economic and social burdens on many countries worldwide. Given the substantial morbidity and mortality from HIV infection, there is an urgent need for accurate and early detection of the virus. In this study, immunofluorescence and visual techniques are described that detect the HIV-1 p24 antigen, which relied on selective recognition of Ag+/Ag nanoparticles (Ag NPs) and Cu2+/Cu+ using cadmium telluride quantum dots (CdTe QDs). After the sandwich immunoreactions were accomplished, the alkaline phosphatase (ALP) hydrolyzed L-ascorbic acid 2-phosphate (AAP) to form ascorbic acid (AA) that further reduces Ag+ and Cu2+ to Ag NPs and Cu+, respectively. This method was highly sensitive and selective and could detect as low as 1 pg/mL of p24 antigen by naked eyes and had a good linearity in the concentration range 1-100 pg/mL. When using Ag+ and Cu2+ as media, the limit of detection (LOD) of the new method was 0.3 pg/mL and 0.2 pg/mL, respectively. Compared with clinical electrochemiluminescence immunoassay (ECLIA) results and clinical data, this method demonstrated good consistency for the quantification of HIV-1 p24 antigen in 34 clinical serum samples. In addition, this method could accurately distinguish HIV from other viruses and infections such as hepatitis B virus, systemic lupus erythematosus, hepatitis C virus, Epstein-Barr virus, cytomegalovirus, lipemia, and hemolysis. Therefore, our dual-mode analysis method may provide additional solutions to identify clinical HIV infection. An immunofluorescence and visualization dual-mode strategy for the detection of p24 antigen was constructed based on immune recognition reaction and a phenomenon that cadmium telluride quantum dots (CdTe QDs) can selectively recognize Ag+/Ag nanoparticles (Ag NPs) and Cu2+/Cu+.
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Affiliation(s)
- Zhuoyun Tang
- Department of Laboratory Medicine, Department of Dermatology, State Key Laboratory of Biotherapy and Cancer Center, Med+X Center for Manufacturing, Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Zeliang Wei
- Department of Laboratory Medicine, Department of Dermatology, State Key Laboratory of Biotherapy and Cancer Center, Med+X Center for Manufacturing, Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Ke Huang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, 610068, Sichuan, China
| | - Yinhao Wei
- Department of Laboratory Medicine, Department of Dermatology, State Key Laboratory of Biotherapy and Cancer Center, Med+X Center for Manufacturing, Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Dongdong Li
- Department of Laboratory Medicine, Department of Dermatology, State Key Laboratory of Biotherapy and Cancer Center, Med+X Center for Manufacturing, Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Shixin Yan
- Department of Laboratory Medicine, Department of Dermatology, State Key Laboratory of Biotherapy and Cancer Center, Med+X Center for Manufacturing, Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Jin Huang
- Department of Laboratory Medicine, Department of Dermatology, State Key Laboratory of Biotherapy and Cancer Center, Med+X Center for Manufacturing, Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Jia Geng
- Department of Laboratory Medicine, Department of Dermatology, State Key Laboratory of Biotherapy and Cancer Center, Med+X Center for Manufacturing, Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
| | - Chuanmin Tao
- Department of Laboratory Medicine, Department of Dermatology, State Key Laboratory of Biotherapy and Cancer Center, Med+X Center for Manufacturing, Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
| | - Piaopiao Chen
- Department of Laboratory Medicine, Department of Dermatology, State Key Laboratory of Biotherapy and Cancer Center, Med+X Center for Manufacturing, Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
| | - Binwu Ying
- Department of Laboratory Medicine, Department of Dermatology, State Key Laboratory of Biotherapy and Cancer Center, Med+X Center for Manufacturing, Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
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21
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Wang X, Chen X, Zhou R, Hu P, Huang K, Chen P. Filter-Assisted Separation of Multiple Nanomaterials: Mechanism and Application in Atomic/Mass Spectrometry/Fluorescence Label-Free Multimode Bioassays. Anal Chem 2021; 93:3889-3897. [PMID: 33595278 DOI: 10.1021/acs.analchem.0c04562] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Atomic spectrometry (AS) has been widely used in bioassay, but it requires steps to immobilize or separate the signal molecules. In this work, based on the phenomenon that the filter membrane can selectively separate multiple nanomaterials (nanoparticles (NPs) and quantum dots (QDs)) and its related ions, including poly(thymine)-templated Cu NPs and free Cu2+, Ag NPs and free Ag+, CdTe QDs and Cd2+, we constructed multimode and label-free biosensors by chemical vapor generation-atomic fluorescence spectrometry (CVG-AFS), inductively coupled plasma mass spectrometry (ICP-MS), and fluorescence. In this strategy, terminal deoxynucleotidyl transferase (TdT) and polynucleotide kinase (PNK), H2O2, and mucin 1 can be sensitively detected using Cu2+, Ag+, and Cd2+ as the signal probe, respectively. As a result, TdT and T4 PNK in single cells level can be accurately quantified. In addition, the possible separation mechanism of filter membrane was proposed, both Donnan repulsion by charged functional layer and entrapment effect by nanomaterials size contributed to the outstanding separation performance. Subsequently, on the basis that CdTe QDs can selectively identify Cu NPs/Cu2+, Ag NPs/Ag+, and C-Ag+-C/Ag+, cation-exchange reaction (CER) was introduced in this platform due to its unique advantages, including improving the sensitivity of the above system (an order of magnitude), converting the non-CVG metal elements into CVG elements, and using low-cost AFS to substitute the high-cost ICP-MS. In addition, we performed theoretical calculations of the selective CER using density functional theory (DFT). Therefore, this label-free and simple separation AS/ICP-MS sensing platform shows great potential for biomarker analysis.
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Affiliation(s)
- Xiu Wang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Xin Chen
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Ronghui Zhou
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Pingyue Hu
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Ke Huang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Piaopiao Chen
- Department of Laboratory Medicine, State Key Laboratory of Biotherapy and Cancer Center, Med+X Center for Manufacturing, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, Sichuan 610041, China
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Wang X, Chen W, Yang H, Yuan X, Huang K, Chen P, Ying B. Homogeneous assay based on the pre-reduction and selective cation exchange for detection of multiple targets by atomic spectrometry. Talanta 2020; 219:121387. [PMID: 32887089 DOI: 10.1016/j.talanta.2020.121387] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 07/03/2020] [Accepted: 07/06/2020] [Indexed: 02/05/2023]
Abstract
In view of the high sensitivity and good selectivity, chemical vapor generation atomic spectrometry (CVG-AS) and inductively coupled plasma mass spectrometer (ICP-MS), especially low-cost atomic fluorescence spectrometry (AFS) have been widely used in bioassay. However, the existing AS method is mostly based on heterogeneous strategies, and can't detect multiple targets in one system. In this study, we present the discovery and mechanism study of a phenomenon of Hg2+ pre-reduction that the concentration of Hg2+ decreased when it was mixed with the reductants (ascorbic acid (AA), SnCl2, or NaBH4/KBH4) over long-time reaction (hours) by CVG-AFS and ICP-MS. A homogeneous Cu2+ assay method was developed based on the competition reaction of Cu2+ and Hg2+ for consuming AA, and its application in the detection of pyrophosphate (PPi) and alkaline phosphatase (ALP) was investigated based on the PPi complexation with Cu2+, and ALP hydrolyzation of PPi using CVG-AFS as a representative detector. Subsequently, in order to further verify the applicability of the system, cation exchange reaction (CER) was utilized here based on the selectively recognize Ag+ and C-Ag+-C by CuS nanoparticles (NPs). As the exchanged Cu2+ from CuS NPs can be sensitively and selectively detected via above-mentioned Cu2+ assay method, this strategy can be extended for the Ag+, DNA and prostate specific antigen (PSA) detection based on base complementary pairing and the specific recognition of aptamer. Under the optimal experimental conditions, the system showed high sensitivity for the detection of Cu2+, PPi, ALP, Ag+, DNA, and PSA, with limit of detections (LODs) of 0.12 nmol L-1, 25 μmol L-1, 0.025 U/L, 0.2 nmol L-1, 0.05 nmol L-1, and 0.03 ng/mL, respectively. The method was successfully used to determination Cu2+, ALP, and PSA in human serums, showing similar results with those of ICP-MS and kits methods.
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Affiliation(s)
- Xiu Wang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan, 610068, China
| | - Wanli Chen
- College of Chemistry and Chemical Engineering, China West Normal University, Nanchong, 637000, China
| | - Haiyan Yang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan, 610068, China
| | - Xin Yuan
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, 611137, China
| | - Ke Huang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan, 610068, China.
| | - Piaopiao Chen
- Department of Laboratory Medicine, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, Sichuan, 610041, China.
| | - Binwu Ying
- Department of Laboratory Medicine, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, Sichuan, 610041, China.
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Tong YJ, Qi JX, Song AM, Zhong XL, Jiang W, Zhang L, Liang RP, Qiu JD. Electronic synergy between ligands of luminol and isophthalic acid for fluorescence ratiometric detection of Hg2+. Anal Chim Acta 2020; 1128:11-18. [DOI: 10.1016/j.aca.2020.06.047] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 06/16/2020] [Accepted: 06/18/2020] [Indexed: 02/07/2023]
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Chen P, Zheng C, Chen C, Huang K, Wang X, Hu P, Geng J. Thiol inhibition of Hg cold vapor generation in SnCl 2/NaBH 4 system: A homogeneous bioassay for H 2O 2/glucose and butyrylcholinesterase/pesticide sensing by atomic spectrometry. Anal Chim Acta 2020; 1111:8-15. [PMID: 32312400 DOI: 10.1016/j.aca.2020.03.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 02/18/2020] [Accepted: 03/14/2020] [Indexed: 02/08/2023]
Abstract
Recently, the use of atomic spectrometry (AS) for biochemical analysis has attracted considerable attention due to its high sensitivity, selectivity and anti-interference ability. In this work, we conducted a detailed study on a phenomenon of thiol inhibition of mercury (Hg2+) cold vapor generation (CVG) and found L-cysteine (L-Cys), glutathione (GSH), dithiothreitol, N-Acetyl-L-cysteine, 3-mercaptopropionic acid, β-mercaptoethanol, and NaI can inhibit the CVG of Hg2+, while EDTA has no inhibitory effect. Furthermore, changing the content of -SH can effectively adjust the CVG atomic fluorescence spectrometer (CVG-AFS) signal of Hg2+. As as a consequence, an AS-based homogeneous bioassay was constructed by adjusting the oxidation ratio and production quantity of -SH in the system. The quantitative analysis of the system was demonstrated by using AFS as a representative detector. Hydrogen peroxide (H2O2) and glucose were used as representative analytes for the validation of Hg2+ atomic fluorescence signal turn-off strategy, and butyrylcholinesterase (BChE) as well as parathion (organophosphorus pesticides, OPs) as utilized as representative targets for the signal turn-on strategy. Under optimal experimental conditions, the homogeneous CVG-AFS sensor can be successfully used to detect 3 μM H2O2, 30 μM glucose, 0.25 U/L BChE, and 0.4 μg/mL parathion. In addition, the detection results of glucose and BChE in human serum samples agreed well with those obtained by using glucometer and kit, showing the promising potential of this method for practical applications. Therefore, this work provides a perspective for the construction of AS-based homogeneous bioassays and shows great potential for the detection of biomarkers.
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Affiliation(s)
- Piaopiao Chen
- Department of Laboratory Medicine, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, Sichuan, 610041, China
| | - Chengbin Zheng
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Chuan Chen
- Department of Laboratory Medicine, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, Sichuan, 610041, China; Institute of Pharmacology & School of Pharmacy, North Sichuan Medical College, Nanchong, Sichuan, 637000, China
| | - Ke Huang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan, 610068, China
| | - Xiu Wang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan, 610068, China
| | - Pingyue Hu
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan, 610068, China
| | - Jia Geng
- Department of Laboratory Medicine, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, Sichuan, 610041, China.
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Chen P, Huang K, Zhang P, Sawyer E, Wu Z, Wei X, Ying B, Geng J. Exonuclease III-assisted strand displacement reaction-driven cyclic generation of G-quadruplex strategy for homogeneous fluorescent detection of melamine. Talanta 2019; 203:255-260. [DOI: 10.1016/j.talanta.2019.05.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 05/01/2019] [Accepted: 05/02/2019] [Indexed: 02/06/2023]
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26
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Chen P, Huang K, Dai R, Sawyer E, Sun K, Ying B, Wei X, Geng J. Sensitive CVG-AFS/ICP-MS label-free nucleic acid and protein assays based on a selective cation exchange reaction and simple filtration separation. Analyst 2019; 144:2797-2802. [PMID: 30882111 DOI: 10.1039/c8an01926f] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Nowadays, label-free atomic spectrometric bioassays are attracting great research interest because of their advantages of low cost, simple design and operation, etc. Herein, a novel and simple chemical vapor generation-atomic fluorescence spectrometry (CVG-AFS)/inductively coupled plasma-mass spectrometry (ICP-MS) label-free detection method is presented for highly sensitive and selective assay of DNA and proteins. This work mainly combined a phenomenon that CdTe quantum dots (QDs) can be used to selectively differentiate free Hg2+ and the T-Hg2+-T complex, with the use of simple membrane filtration separation to improve the performance of the label-free bioassay methods. Upon hybridization with the DNA/protein (carcinoembryonic antigen, CEA) target, the T-Hg2+-T hairpin structure was opened and Hg2+ was released; this initiated the cation exchange reaction between Hg2+ and CdTe QDs which released Cd2+ simultaneously. Subsequently, the free Cd2+ was separated by the filtration membrane without separating the CdTe QDs, which could then be separated from the sample matrices for the CVG-AFS/ICP-MS assay. Under the optimal conditions, this method possessed high sensitivity for DNA and CEA determination with limits of detection (LODs) of 0.2 nM and 0.2 ng mL-1, and linear dynamic ranges of 1-160 nM and 0.5-20 ng mL-1, respectively, and exhibited excellent DNA sequence specificity and protein selectivity. This method preserves the advantages of the label-free atomic spectrometric bioassay, and combined with the selective cation exchange reaction and simple filtration separation to improve the performance.
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Affiliation(s)
- Piaopiao Chen
- Department of Laboratory Medicine, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, Sichuan 610041, China.
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Chen P, Sawyer E, Sun K, Zhang X, Chen C, Ying B, Wei X, Wu Z, Geng J. A general strategy for label-free homogeneous bioassays based on selective recognition and silver ion-mediated conformational switch. Talanta 2019; 201:9-15. [DOI: 10.1016/j.talanta.2019.03.088] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 03/11/2019] [Accepted: 03/24/2019] [Indexed: 12/26/2022]
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28
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A sensitive and label-free sensor for melamine and iodide by target-regulating the formation of G-quadruplex. Microchem J 2019. [DOI: 10.1016/j.microc.2019.01.044] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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29
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Dai R, Hu P, Wang X, Wang S, Song X, Huang K, Chen P. Visual/CVG-AFS/ICP-MS multi-mode and label-free detection of target nucleic acids based on a selective cation exchange reaction and enzyme-free strand displacement amplification. Analyst 2019; 144:4407-4412. [PMID: 31210203 DOI: 10.1039/c9an00642g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Visual/CVG-AFS/ICP-MS three-mode detection of DNA based on the selective cation exchange reaction and enzyme-free strand displacement amplification.
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Affiliation(s)
- Rui Dai
- College of Chemistry and Material Science
- Sichuan Normal University
- Chengdu
- China
| | - Pingyue Hu
- College of Chemistry and Material Science
- Sichuan Normal University
- Chengdu
- China
| | - Xiu Wang
- College of Chemistry and Material Science
- Sichuan Normal University
- Chengdu
- China
| | - Shixin Wang
- College of Chemistry and Material Science
- Sichuan Normal University
- Chengdu
- China
| | - Xinmei Song
- College of Chemistry and Material Science
- Sichuan Normal University
- Chengdu
- China
| | - Ke Huang
- College of Chemistry and Material Science
- Sichuan Normal University
- Chengdu
- China
| | - Piaopiao Chen
- Department of Laboratory Medicine
- State Key Laboratory of Biotherapy and Cancer Center
- West China Hospital
- Sichuan University and Collaborative Innovation Center for Biotherapy
- Chengdu
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