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Jia X, Zhou J, Xiao F, Huang X, He W, Hu W, Kong Y, Yan W, Ji J, Qi Y, Wang Y, Tai J. Multiple cross displacement amplification combined with nanoparticle-based lateral flow biosensor for rapid and sensitive detection of Epstein-Barr virus. Front Cell Infect Microbiol 2024; 13:1321394. [PMID: 38259964 PMCID: PMC10800922 DOI: 10.3389/fcimb.2023.1321394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Accepted: 12/15/2023] [Indexed: 01/24/2024] Open
Abstract
Introduction Epstein-Barr virus (EBV) is a highly dangerous virus that is globally prevalent and closely linked to the development of nasopharyngeal cancer (NPC). Plasma EBV DNA analysis is an effective strategy for early detection, prognostication and monitoring of treatment response of NPC. Methods Here, we present a novel molecular diagnostic technique termed EBV-MCDA-LFB, which integrates multiple cross displacement amplification (MCDA) with nanoparticle-based lateral flow (LFB) to enable simple, rapid and specific detection of EBV. In the EBV-MCDA-LFB system, a set of 10 primers was designed for rapidly amplifying the highly conserved tandem repeat BamHI-W region of the EBV genome. Subsequently, the LFB facilitate direct assay reading, eliminating the use of extra instruments and reagents. Results The outcomes showed that the 65°C within 40 minutes was the optimal reaction setting for the EBV-MCDA system. The sensitivity of EBV-MCDA-LFB assay reached 7 copies per reaction when using EBV recombinant plasmid, and it showed 100% specificity without any cross-reactivity with other pathogens. The feasibility of the EBV-MCDA-LFB method for EBV detection was successfully validated by 49 clinical plasma samples. The complete detection process, consisting of rapid template extraction (15 minutes), MCDA reaction (65°C for 40 minutes), and LFB result reading (2 minutes), can be finalized within a 60-minutes duration. Discussion EBV-MCDA-LFB assay designed here is a fast, extremely sensitive and specific technique for detecting EBV in field and at the point-of-care (PoC), which is especially beneficial for countries and regions with a high prevalence of the disease and limited economic resources.
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Affiliation(s)
- Xinbei Jia
- Department of Otorhinolaryngology Head and Neck Surgery, Children’s Hospital Capital Institute of Pediatrics, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Juan Zhou
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Fei Xiao
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Xiaolan Huang
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Wenqiang He
- Department of Otolaryngology, Head and Neck Surgery, Children’s Hospital Capital Institute of Pediatrics, Beijing, China
| | - Wen Hu
- Department of Otolaryngology, Head and Neck Surgery, Children’s Hospital Capital Institute of Pediatrics, Beijing, China
| | - Yaru Kong
- Department of Otorhinolaryngology Head and Neck Surgery, Children’s Hospital Capital Institute of Pediatrics, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Weiheng Yan
- Department of Otorhinolaryngology Head and Neck Surgery, Children’s Hospital Capital Institute of Pediatrics, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Jie Ji
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children′s Hospital, Capital Medical University, National Center for Children′s Health, Beijing, China
| | - Yuwei Qi
- Department of Otolaryngology, Head and Neck Surgery, Children’s Hospital Capital Institute of Pediatrics, Beijing, China
| | - Yi Wang
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Jun Tai
- Department of Otorhinolaryngology Head and Neck Surgery, Children’s Hospital Capital Institute of Pediatrics, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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Huang J, Tong Y, Yang X, Chen Y, Wei X, Chen X, Li J, Li S. Biosensor-Based Multiple Cross Displacement Amplification for the Rapid Detection of Mycobacterium leprae. ACS Infect Dis 2023; 9:1932-1940. [PMID: 37738642 DOI: 10.1021/acsinfecdis.3c00213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/24/2023]
Abstract
Leprosy is an ancient disease caused by Mycobacterium leprae (ML) that remains a public health problem in poverty-stricken areas worldwide. Although many ML detection techniques have been used, a rapid and sensitive tool is essential for the early detection and treatment of leprosy. Herein, we developed a rapid ML detection technique by combining multiple cross displacement amplification (MCDA) with a nanoparticle-based lateral flow biosensor (LFB), termed ML-MCDA-LFB. MCDA induced a rapid isothermal reaction using specific primers targeting the RLEP gene, and the LFB enabled instant visual amplicon detection. The pure genomic DNA of ML and nucleic acids from various pathogens were employed to evaluate and optimize the ML-MCDA-LFB assay. The optimal conditions for ML-MCDA-LFB were 68 °C and 35 min, respectively. The limit of detection for pure ML genomic DNA was 150 fg per vessel, and the specificity of detection was 100% for the experimental strains. Additionally, the entire detection process could be performed within 40 min, including the isothermal amplification (35 min) and result confirmation (1-2 min). Hence, the ML-MCDA-LFB assay was shown to be a rapid, sensitive, and visual method for detecting ML and could be used as a potential tool for early clinical diagnosis and field screening of leprosy.
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Affiliation(s)
- Junfei Huang
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou 550004, P. R. China
| | - Yi Tong
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou 550004, P. R. China
| | - Xinggui Yang
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou 550004, P. R. China
| | - Yijiang Chen
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou 550004, P. R. China
| | - Xiaoyu Wei
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou 550004, P. R. China
| | - Xu Chen
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550003, P. R. China
| | - Jinlan Li
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou 550004, P. R. China
| | - Shijun Li
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou 550004, P. R. China
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Zeng X, Yang X, Yang L, Yi X, Chen X, Huang J, Wang Y, Li S. A modified multiple cross displacement amplification linked with a gold nanoparticle biosensor for the detection of Epstein-Barr virus in clinical applications. Front Microbiol 2023; 14:1268572. [PMID: 37886077 PMCID: PMC10598869 DOI: 10.3389/fmicb.2023.1268572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 09/25/2023] [Indexed: 10/28/2023] Open
Abstract
Epstein-Barr virus (EBV), a double-stranded DNA virus belonging to the family Herpesviridae, infects more than 95% of healthy adults by attacking the host immune system. Here, a novel detection protocol, utilizing the modified multiple cross displacement amplification (MCDA) technique combined with a gold nanoparticles-based lateral flow biosensors (AuNPs-LFB), was devised and developed to detect EBV infection (termed EBV-MCDA-LFB assay). Ten MCDA primers targeting the EBNA-LP gene were designed, including CP1* primers modified with 6-carboxyfluorescein (FAM) and D1* primers modified with biotin. Then, nucleic acid templates extracted from various pathogens and whole blood samples were used to optimize and evaluate the EBV-MCDA-LFB assay. As a result, the lowest concentration of EBNA-plasmids, which can be detected by MCDA-LFB assay with an optimal reaction condition of 67°C for 30 min, was 10 copies/reaction. Here, the MCDA-LFB assay can detect all EBV pathogens used in the study, and no cross-reactions with non-EBV organisms were observed. Meanwhile, the entire detection workflow of the EBV-MCDA-LFB assay for whole blood samples, including DNA template preparation (25 min), EBV-MCDA amplification (30 min), and AuNPs-LFB-mediated validation (2-5 min), can be completed within 1 h. Taken together, the EBV-MCDA-LFB assay established in the current study is a rapid, simplified, sensitive, specific, and easy-to-obtain technique that can be used as a screening or diagnostic tool for EBV infection in clinical applications, especially in resource-poor regions.
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Affiliation(s)
- Xiaoyan Zeng
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou, China
| | - Xinggui Yang
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, China
| | - Ludi Yang
- Tongren People's Hospital, Tongren, Guizhou, China
| | - Xu Yi
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou, China
| | - Xu Chen
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou, China
| | - Junfei Huang
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, China
| | - Yu Wang
- Department of Clinical Laboratory, The First People's Hospital of Guiyang, Guiyang, Guizhou, China
| | - Shijun Li
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, China
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Jia N, Wang C, Liu X, Huang X, Xiao F, Fu J, Sun C, Xu Z, Wang G, Zhou J, Wang Y. A CRISPR-Cas12a-based platform for ultrasensitive rapid highly specific detection of Mycobacterium tuberculosis in clinical application. Front Cell Infect Microbiol 2023; 13:1192134. [PMID: 37287467 PMCID: PMC10242030 DOI: 10.3389/fcimb.2023.1192134] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 05/09/2023] [Indexed: 06/09/2023] Open
Abstract
Tuberculosis, caused by Mycobacterium tuberculosis (MTB), is the second leading cause of death after COVID-19 pandemic. Here, we coupled multiple cross displacement amplification (MCDA) technique with CRISPR-Cas12a-based biosensing system to design a novel detection platform for tuberculosis diagnosis, termed MTB-MCDA-CRISPR. MTB-MCDA-CRISPR pre-amplified the specific sdaA gene of MTB by MCDA, and the MCDA results were then decoded by CRISPR-Cas12a-based detection, resulting in simple visual fluorescent signal readouts. A set of standard MCDA primers, an engineered CP1 primer, a quenched fluorescent ssDNA reporter, and a gRNA were designed targeting the sdaA gene of MTB. The optimal temperature for MCDA pre-amplification is 67°C. The whole experiment process can be completed within one hour, including sputum rapid genomic DNA extraction (15 minutes), MCDA reaction (40 minutes), and CRISPR-Cas12a-gRNA biosensing process (5 minutes). The limit of detection (LoD) of the MTB-MCDA-CRISPR assay is 40 fg per reaction. The MTB-MCDA-CRISPR assay does not cross reaction with non-tuberculosis mycobacterium (NTM) strains and other species, validating its specificity. The clinical performance of MTB-MCDA-CRISPR assay was higher than that of the sputum smear microscopy test and comparable to that of Xpert method. In summary, the MTB-MCDA-CRISPR assay is a promising and effective tool for tuberculosis infection diagnosis, surveillance and prevention, especially for point-of-care (POC) test and field deployment in source-limited regions.
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Affiliation(s)
- Nan Jia
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Chaohong Wang
- Department of Clinical Laboratory, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing, China
| | - Xiaming Liu
- The Second Department of Geriatrics, Handan Central Hospital, Handan, Hebei, China
| | - Xiaolan Huang
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Fei Xiao
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Jin Fu
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Chunrong Sun
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Zheng Xu
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Guirong Wang
- Department of Clinical Laboratory, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing, China
| | - Juan Zhou
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Yi Wang
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
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Yang X, Huang J, Chen Y, Ying X, Tan Q, Chen X, Zeng X, Lei S, Wang Y, Li S. Development of CRISPR/Cas12b-Based Multiple Cross Displacement Amplification Technique for the Detection of Mycobacterium tuberculosis Complex in Clinical Settings. Microbiol Spectr 2023; 11:e0347522. [PMID: 36975805 PMCID: PMC10100757 DOI: 10.1128/spectrum.03475-22] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 03/02/2023] [Indexed: 03/29/2023] Open
Abstract
Tuberculosis (TB) is a chronic infectious disease with high mortality caused by the Mycobacterium tuberculosis complex (MTC). Its clinical symptoms include a prolonged cough with mucus, pleuritic chest pain, hemoptysis, etc., and predominant complications such as tuberculous meningitis and pleural effusion. Thus, developing rapid, ultrasensitive, and highly specific detection techniques plays an important role in controlling TB. Here, we devised CRISPR/CRISPR-associated 12b nuclease (CRISPR/Cas12b)-based multiple cross displacement amplification technique (CRISPR-MCDA) targeting the IS6110 sequence and used it to detect MTC pathogens. A newly engineered protospacer adjacent motif (PAM) site (TTTC) was modified in the linker region of the CP1 primer. In the CRISPR-MCDA system, the exponentially amplified MCDA amplicons with the PAM sites can guide the Cas12b/gRNA complex to quickly and accurately recognize its target regions, which successfully activates the CRISPR/Cas12b effector and enables ultrafast trans-cleavage of single-stranded DNA reporter molecules. The limit of detection of the CRISPR-MCDA assay was 5 fg/μL of genomic DNA extracted from the MTB reference strain H37Rv. The CRISPR-MCDA assay successfully detected all examined MTC strains and there was no cross-reaction with non-MTC pathogens, confirming that its specificity is 100%. The entire detection process can be completed within 70 min using real-time fluorescence analysis. Moreover, visualization detection (under UV light) was also designed to verify the results, eliminating the use of specialized instruments. In conclusion, the CRISPR-MCDA assay established in this report can be used as a valuable detection technique for MTC infection. IMPORTANCE The Mycobacterium tuberculosis complex pathogen is a crucial infectious agent of tuberculosis. Hence, improving the capability of MTC detection is one of the most urgently required strategies for preventing and controlling TB. In this report, we successfully developed and implemented CRISPR/Cas12b-based multiple cross displacement amplification targeting the IS6110 sequence to detect MTC pathogens. These results demonstrated that the CRISPR-MCDA assay developed in this study was a rapid, ultrasensitive, highly specific, and readily available method which can be used as a valuable diagnostic tool for MTC infection in clinical settings.
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Affiliation(s)
- Xinggui Yang
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, People’s Republic of China
| | - Junfei Huang
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, People’s Republic of China
| | - Yijiang Chen
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, People’s Republic of China
| | - Xia Ying
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, People’s Republic of China
| | - Qinqin Tan
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, People’s Republic of China
| | - Xu Chen
- Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou, People’s Republic of China
| | - Xiaoyan Zeng
- Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou, People’s Republic of China
| | - Shiguang Lei
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, People’s Republic of China
| | - Yi Wang
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, People’s Republic of China
| | - Shijun Li
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, People’s Republic of China
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Huang J, Yang X, Ren L, Jiang W, Huang Y, Liu Y, Liu C, Chen X, Li S. A novel, ultrafast, ultrasensitive diagnosis platform for the detection of SARS-COV-2 using restriction endonuclease-mediated reverse transcription multiple cross displacement amplification. J Med Virol 2023; 95:e28444. [PMID: 36579774 PMCID: PMC9880628 DOI: 10.1002/jmv.28444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 12/07/2022] [Accepted: 12/23/2022] [Indexed: 12/30/2022]
Abstract
Coronavirus disease 2019 (COVID-19) is a highly infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-COV-2). Though many methods have been used for detecting SARS-COV-2, development of an ultrafast and highly sensitive detection strategy to screen and/or diagnose suspected cases in the population, especially early-stage patients with low viral load, is significant for the prevention and treatment of COVID-19. In this study, a novel restriction endonuclease-mediated reverse transcription multiple cross displacement amplification (MCDA) combined with real-time fluorescence analysis (rRT-MCDA) was successfully established and performed to diagnose COVID-19 infection (COVID-19 rRT-MCDA). Two sets of specific SARS-COV-2 rRT-MCDA primers targeting opening reading frame 1a/b (ORF1ab) and nucleoprotein (NP) genes were designed and modified according to the reaction mechanism. The SARS-COV-2 rRT-MCDA test was optimized and evaluated using various pathogens and clinical samples. The optimal reaction condition of SARS-COV-2 rRT-MCDA assay was 65°C for 36 min. The SARS-COV-2 rRT-MCDA limit of detection (LoD) was 6.8 copies per reaction. Meanwhile, the specificity of SARS-COV-2 rRT-MCDA assay was 100%, and there was no cross-reaction with nucleic acids of other pathogens. In addition, the whole detection process of SARS-COV-2 rRT-MCDA, containing the RNA template processing (15 min) and real-time amplification (36 min), can be accomplished within 1 h. The SARS-COV-2 rRT-MCDA test established in the current report is a novel, ultrafast, ultrasensitive, and highly specific detection method, which can be performed as a valuable screening and/or diagnostic tool for COVID-19 in clinical application.
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Affiliation(s)
- Junfei Huang
- Guizhou Provincial Center for Disease Control and PreventionGuiyangGuizhouChina
| | - Xinggui Yang
- Guizhou Provincial Center for Disease Control and PreventionGuiyangGuizhouChina,Public Health SchoolGuizhou Medical UniversityGuiyangGuizhouChina
| | - Lijuan Ren
- Guizhou Provincial Center for Disease Control and PreventionGuiyangGuizhouChina
| | - Weijia Jiang
- Guizhou Provincial Center for Disease Control and PreventionGuiyangGuizhouChina
| | - Yan Huang
- Guizhou Provincial Center for Disease Control and PreventionGuiyangGuizhouChina
| | - Ying Liu
- Guizhou Provincial Center for Disease Control and PreventionGuiyangGuizhouChina
| | - Chunting Liu
- Guizhou Provincial Center for Disease Control and PreventionGuiyangGuizhouChina
| | - Xu Chen
- The Second Affiliated HospitalGuizhou University of Traditional Chinese MedicineGuiyangGuizhouChina
| | - Shijun Li
- Guizhou Provincial Center for Disease Control and PreventionGuiyangGuizhouChina,Public Health SchoolGuizhou Medical UniversityGuiyangGuizhouChina
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Zhou J, Xiao F, Fu J, Jia N, Huang X, Sun C, Liu C, Huan H, Wang Y. Rapid detection of monkeypox virus by multiple cross displacement amplification combined with nanoparticle-based biosensor platform. J Med Virol 2023; 95:e28479. [PMID: 36609918 DOI: 10.1002/jmv.28479] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/29/2022] [Accepted: 01/04/2023] [Indexed: 01/09/2023]
Abstract
The current outbreak of monkeypox virus (MPXV) has become a public health emergency of international concern that highlights the need for rapid, sensitive MPXV diagnostic assays. Here, we combined isothermal multiple cross displacement amplification (MCDA) with nanoparticle-based lateral flow biosensor (LFB) to devise a diagnostic test for the diagnosis of MPXV infection (called MPXV-MCDA-LFB) and differentiation of West and Central African MPXV isolates. The MPXV-MCDA-LFB protocol conducts isothermal MCDA reaction for DNA templates followed by LFB detection of preamplification target sequences. Two MCDA primer sets were designed targeting the D41L and ATI genes of Central and West African MPXV isolates, respectively, and the optimal condition of two MCDA reactions was 64°C for 30 min. The two MCDA reactions were decoded by LFB, which was devised for detecting three targets, including two amplicons yielded from two MCDA reactions and a chromatography control. Thus, the MPXV-MCDA-LFB assay could be completed within 50 min including rapid template preparation (15 min), MCDA reaction (30 min) and reporting of result (<5 min). The MPXV-MCDA-LFB method is very sensitive and can detect the target genes (D14L and ATI) with as low as five copies of plasmid template per reaction and 12.5 copies of pseudotyped virus in human blood samples. The MPXV-MCDA-LFB assay does not cross-react with non-MPXV templates, validating its specificity. Therefore, the MPXV-MCDA-LFB assay developed here is a useful tool for rapid and reliable diagnosis of MPXV infection.
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Affiliation(s)
- Juan Zhou
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, People's Republic of China
| | - Fei Xiao
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, People's Republic of China
| | - Jin Fu
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, People's Republic of China
| | - Nan Jia
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, People's Republic of China
| | - Xiaolan Huang
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, People's Republic of China
| | - Chunrong Sun
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, People's Republic of China
| | - Chunyan Liu
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, People's Republic of China
| | - Hui Huan
- Department of Infectious Diseases, Affiliated Children's Hospital, Capital Institute of Pediatrics, Beijing, People's Republic of China
| | - Yi Wang
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, People's Republic of China
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Jia N, Zhou J, Xiao F, Zheng B, Huang X, Sun C, Fu J, Xu Z, Chen M, Wang Y. A CRISPR-Cas12a-Based platform for ultrasensitive, rapid, and highly specific detection of Mycoplasma pneumonia in clinical application. Front Bioeng Biotechnol 2023; 11:1022066. [PMID: 36733967 PMCID: PMC9887289 DOI: 10.3389/fbioe.2023.1022066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 01/09/2023] [Indexed: 01/19/2023] Open
Abstract
Mycoplasma pneumoniae (MP), which is responsible for a majority of community-acquired pneumonia (CAP) in children, has been largely underestimated. Here, we coupled multiple cross displacement amplification (MCDA) technique with CRISPR-Cas12a-based biosensing system to design a novel detection platform termed MP-MCDA-CRISPR assay for MP infection diagnosis and clinical application. The MP-MCDA-CRISPR assay amplified the CARDS gene of MP by MCDA method, followed by trans-cleavage of the reporter molecular upon the formation of CRISPR-Cas12a-gRNA-target DNA complex, which was confirmed by the release of fluorescent signals. A set of standard MCDA primers, an engineered CP1 primer, a quenched fluorescent ssDNA reporter, and a gRNA were designed targeting the CARDS gene of MP. The optimal temperature for MCDA pre-amplification is 64°C, and the time for CRISPR-Cas12a-gRNA biosensing process is 5 min. The limit of detection (LoD) of the MP-MCDA-CRISPR assay is 50 fg per reaction without any cross-reaction with other non-MP pathogens. The MP-MCDA-CRISPR assay accurately identified the 50 real time-PCR positive clinical samples and 78 negative ones. Taken together, the MP-MCDA-CRISPR assay designed here is a promising diagnostic tool for point-of care (POC) testing of MP infection.
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Affiliation(s)
- Nan Jia
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Juan Zhou
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Fei Xiao
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Baoying Zheng
- Respiratory Medicine, Capital Institute of Pediatrics, Beijing, China
| | - Xiaolan Huang
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Chunrong Sun
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Jin Fu
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Zheng Xu
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Min Chen
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Yi Wang
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China,*Correspondence: Yi Wang,
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Yang X, Wang Y, Liu Y, Huang J, Wei X, Tan Q, Zeng X, Ying X, Li S. Rapid, ultrasensitive, and highly specific identification of Brucella abortus utilizing multiple cross displacement amplification combined with a gold nanoparticles-based lateral flow biosensor. Front Microbiol 2022; 13:1071928. [PMID: 36523830 PMCID: PMC9744775 DOI: 10.3389/fmicb.2022.1071928] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 11/04/2022] [Indexed: 10/28/2023] Open
Abstract
Brucella abortus (B. abortus) as an important infectious agent of bovine brucellosis cannot be ignored, especially in countries/regions dominated by animal husbandry. Thus, the development of an ultrasensitive and highly specific identification technique is an ideal strategy to control the transmission of bovine brucellosis. In this report, a novel detection protocol, which utilizes multiple cross displacement amplification (MCDA) combined with a gold nanoparticles-based lateral flow biosensor (AuNPs-LFB) targeting the BruAb2_0168 gene was successfully devised and established for the identification of B. abortus (termed B. abortus-MCDA-LFB). Ten specific primers containing engineered C1-FAM (carboxyfluorescein) and D1-biotin primers were designed according to the MCDA reaction mechanism. These genomic DNA extracted from various bacterial strains and whole blood samples were used to optimize and evaluate the B. abortus-MCDA-LFB assay. As a result, the optimal reaction conditions for the B. abortus-MCDA-LFB assay were 66°C for 40 min. The limit of detection of the B. abortus-MCDA-LFB was 10 fg/μl (~3 copies/μl) for genomic DNA extracted from pure cultures of B. abortus isolate. Meanwhile, the B. abortus-MCDA-LFB assay accurately identified all tested B. abortus strains, and there was no cross-reaction with non-B. abortus pathogens. Moreover, the detection workflow of the B. abortus-MCDA-LFB assay for whole blood samples can be completed within 70 min, and the cost of a single test is approximately 5.0 USD. Taken together, the B. abortus-MCDA-LFB assay is a visual, fast, ultrasensitive, low-cost, easy-to-operate, and highly specific detection method, which can be used as a rapid identification tool for B. abortus infections.
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Affiliation(s)
- Xinggui Yang
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, China
| | - Yue Wang
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, China
| | - Ying Liu
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, China
| | - Junfei Huang
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, China
| | - Xiaoyu Wei
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, China
| | - Qinqin Tan
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, China
| | - Xiaoyan Zeng
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou, China
| | - Xia Ying
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, China
| | - Shijun Li
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, China
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10
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Jiao WW, Wang GR, Sun L, Xiao J, Li JQ, Wang YC, Quan ST, Huang HR, Shen AD. Multiple Cross Displacement Amplification Combined With Real-Time Polymerase Chain Reaction Platform: A Rapid, Sensitive Method to Detect Mycobacterium tuberculosis. Front Microbiol 2022; 12:812690. [PMID: 35003045 PMCID: PMC8733396 DOI: 10.3389/fmicb.2021.812690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 12/07/2021] [Indexed: 11/25/2022] Open
Abstract
In this study, we evaluated the diagnostic accuracy of multiple cross displacement amplification (MCDA) combined with real-time PCR platform in pulmonary tuberculosis (PTB) patients. Total 228 PTB patients and 141 non-TB cases were enrolled. Based on the analysis of the first available sample of all participants, MCDA assay showed a higher overall sensitivity (64.0%), with a difference of more than 10% compared with Xpert MTB/RIF (Xpert) assay (51.8%, P < 0.05) and combined liquid and solid culture (47.8%, P < 0.001) for PTB diagnosis. In particular, MCDA assay detected 31 probable TB patients, which notably increased the percentage of confirmed TB from 57.9% (132/228) to 71.5% (163/228). The specificities of microscopy, culture, Xpert and MCDA assay were 100% (141/141), 100% (141/141), 100% (141/141), and 98.6% (139/141), respectively. Among the patients with multiple samples, per patient sensitivity of MCDA assay was 60.5% (52/86) when only the first available sputum sample was taken into account, and the sensitivity increased to 75.6% (65/86) when all samples tested by MCDA assay were included into the analysis. Therefore, MCDA assay established in this study is rapid, accurate and affordable, which has the potential in assisting the accurate and rapid diagnosis of PTB and speed up initiation of TB treatment in settings equipped with real-time PCR platform.
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Affiliation(s)
- Wei-Wei Jiao
- Key Laboratory of Major Diseases in Children, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, National Center for Children's Health, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Gui-Rong Wang
- National Tuberculosis Clinical Laboratory, Beijing Key Laboratory for Drug Resistance Tuberculosis Research, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - Lin Sun
- Key Laboratory of Major Diseases in Children, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, National Center for Children's Health, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Jing Xiao
- Key Laboratory of Major Diseases in Children, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, National Center for Children's Health, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Jie-Qiong Li
- Key Laboratory of Major Diseases in Children, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, National Center for Children's Health, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Ya-Cui Wang
- Key Laboratory of Major Diseases in Children, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, National Center for Children's Health, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Shu-Ting Quan
- Key Laboratory of Major Diseases in Children, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, National Center for Children's Health, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Hai-Rong Huang
- National Tuberculosis Clinical Laboratory, Beijing Key Laboratory for Drug Resistance Tuberculosis Research, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - A-Dong Shen
- Key Laboratory of Major Diseases in Children, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, National Center for Children's Health, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China.,Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
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11
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Chen X, Huang L, Zhou Q, Tan Y, Tan X, Dong S. A Nanoparticle-Based Biosensor Combined With Multiple Cross Displacement Amplification for the Rapid and Visual Diagnosis of Neisseria gonorrhoeae in Clinical Application. Front Microbiol 2021; 12:747140. [PMID: 34721348 PMCID: PMC8551913 DOI: 10.3389/fmicb.2021.747140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 09/20/2021] [Indexed: 11/13/2022] Open
Abstract
Gonorrhea is a sexually transmitted disease caused by the host-adapted human pathogen, Neisseria gonorrhoeae. The morbidity is increasing and poses a major public health concern, especially in resource-scarce regions. Therefore, a rapid, visual, sensitive, specific, cost-saving, and simple assay for N. gonorrhoeae detection is critical for prompt treatment and the prevention of further transmission. Here, for the first time, we report a novel assay called the multiple cross displacement amplification combined with gold nanoparticle-based lateral flow biosensor (MCDA-LFB), which we constructed for the rapid and visual identification of N. gonorrhoeae in clinical samples. We successfully devised a set of MCDA primers based on the N. gonorrhoeae-specific gene, orf1. Optimal assay conditions were determined at 67°C, including genomic DNA preparation (∼15 min), MCDA amplification (30 min), and LFB reading (∼2 min), which can be completed within 50 min. The limit of detection (LoD) of the assay was 20 copies/test (in a 25-μl reaction mixture). Assay specificity was 100%, with no cross-reactions with other pathogens. Thus, our N. gonorrhoeae-MCDA-LFB is a rapid, specific, visual, cost-saving, and easy-to-use assay for N. gonorrhoeae diagnostics, and may have great potential for point-of-care (POC) testing in clinical settings, especially in resource-limited regions.
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Affiliation(s)
- Xu Chen
- The Second Clinical College, Guizhou University of Traditional Chinese Medicine, Guiyang, China.,Clinical Medical Laboratory of the Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, China.,Guizhou Provincial Center for Disease Control and Prevention, Guiyang, China
| | - Liming Huang
- The Second Clinical College, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Qingxue Zhou
- Clinical Laboratory, Hangzhou Women's Hospital, Hangzhou, China
| | - Yan Tan
- Guizhou Provincial Center for Clinical Laboratory, Guiyang, China
| | - Xuhong Tan
- The Second Clinical College, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Shilei Dong
- Department of Clinical Laboratory, Zhejiang Hospital, Hangzhou, China
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12
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Chen X, Tan Y, Wang S, Wu X, Liu R, Yang X, Wang Y, Tai J, Li S. A CRISPR-Cas12b-Based Platform for Ultrasensitive, Rapid, and Highly Specific Detection of Hepatitis B Virus Genotypes B and C in Clinical Application. Front Bioeng Biotechnol 2021; 9:743322. [PMID: 34692662 PMCID: PMC8529042 DOI: 10.3389/fbioe.2021.743322] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 08/31/2021] [Indexed: 12/13/2022] Open
Abstract
Hepatitis B virus (HBV) is one of the most dangerous and prevalent agents that causes acute and chronic liver diseases in humans. Genotyping plays an important role in determining clinical outcomes and response to antiviral treatment in HBV-infected patients. Here, we first devised a CRISPR-based testing platform, termed "CRISPR-HBV," for ultrasensitive, highly specific, and rapid detection of two major HBV genotypes (HBV-B and HBV-C) in clinical application. The CRISPR-HBV employed multiple cross displacement amplification (MCDA) for rapid preamplification and then Cas12b-based detection for decoding the targets. Finally, the detection result was read out with real-time fluorescence and a lateral flow biosensor. The sensitivity of CRISPR-HBV was 10 copies per test. The specificity was one hundred percent, and no cross reactions were observed in other HBV genotypes and pathogens. The whole detection process, including DNA template extraction (15 min), preamplification reaction of MCDA (30 min at 65°C), CRISPR-Cas12b-based detection (5 min at 37°C), and results readout (∼2 min), could be completed within 1 h. The feasibility of the CRISPR-HBV assay for genotyping HBV-B and -C as successfully validated with clinical samples. Hence, the CRISPR-HBV assay has remarkable potential to develop a point-of-care testing for identifying and distinguishing HBV genotypes B and C in clinical settings, especially in resource-scarcity countries.
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Affiliation(s)
- Xu Chen
- Central Laboratory of the Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Yan Tan
- Guizhou Provincial Center for Clinical Laboratory, Guiyang, China
| | - Shuoshi Wang
- Central Laboratory of the Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Xueli Wu
- Central Laboratory of the Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Rui Liu
- Central Laboratory of the Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Xinggui Yang
- Public Health School, Guizhou Medical University, Guiyang, China
| | - Yi Wang
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Jun Tai
- Department of Otolaryngology, Head and Neck Surgery, Children's Hospital Capital Institute of Pediatrics, Beijing, China
| | - Shijun Li
- Guizhou Provincial Centre for Disease Control and Prevention, Guiyang, China
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13
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Wang Y, Zhao X, Cheng J, Tang X, Chen X, Yu H, Li S. Development and Application of a Multiple Cross Displacement Amplification Combined With Nanoparticle-Based Lateral Flow Biosensor Assay to Detect Candida tropicalis. Front Microbiol 2021; 12:681488. [PMID: 34177867 PMCID: PMC8222920 DOI: 10.3389/fmicb.2021.681488] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 05/18/2021] [Indexed: 12/27/2022] Open
Abstract
Candida tropicalis is an increasingly opportunistic pathogen that causes serious invasive candidiasis threatening a patient’s life. Traditional methods to detect C. tropicalis infection depends on time-consuming, culture-based gold-standard methods. So, we sought to establish a new method that could detect target pathogens quickly, accurately, and straightforwardly. Herein, a combination of multiple cross displacement amplification (MCDA) and lateral flow biosensors (LFB) was employed to detect C. tropicalis. In the MCDA system, 10 primers were designed to identify the specific genes of C. tropicalis and amplify the genes in an isothermal amplification device. Then, MCDA amplification reaction products could be identified visibly by color change, and all the amplification products would be tested by LFB with no special equipment. The results demonstrated that the optimal reaction condition of C. tropicalis-MCDA assay was 64°C within 30 min, and only 10 fg DNA was required in each reaction. No cross-reaction was found between C. tropicalis strains and non-C. tropicalis strains. For 300 sputum samples, the results showed that MCDA-LFB assay could rapidly and successfully detect all of the C. tropicalis-positive (28/300) samples detected by the gold-standard method. The entire procedure, including specimen processing (40 min), isothermal reaction (30 min) and result reporting (within 2 min), could be completed within 75 min. Briefly, the study results demonstrated that the detection ability of C. tropicalis-MCDA-LFB assay was better than culture methods with more simplicity, rapidity, sensitivity and specificity. Hence, MCDA-LFB strategy is an effective tool to rapidly detect C. tropicalis in clinical samples, especially in resource-poor areas.
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Affiliation(s)
- Yu Wang
- Department of Clinical Laboratory, The First People's Hospital of Guiyang, Guiyang, China.,Laboratory of Bacterial Infectious Disease of Experimental Center, Guizhou Provincial Centre for Disease Control and Prevention, Guiyang, China
| | - Xue Zhao
- Department of Clinical Laboratory, The First People's Hospital of Guiyang, Guiyang, China
| | - Jinzhi Cheng
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
| | - Xiaomin Tang
- Laboratory of Bacterial Infectious Disease of Experimental Center, Guizhou Provincial Centre for Disease Control and Prevention, Guiyang, China
| | - Xu Chen
- Central Laboratory of the Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Honglan Yu
- Department of Clinical Laboratory, The First People's Hospital of Guiyang, Guiyang, China
| | - Shijun Li
- Laboratory of Bacterial Infectious Disease of Experimental Center, Guizhou Provincial Centre for Disease Control and Prevention, Guiyang, China
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14
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Jiang L, Li X, Gu R, Mu D. Rapid Detection of Aspergillus fumigatus Using Multiple Cross Displacement Amplification Combined With Nanoparticles-Based Lateral Flow. Front Cell Infect Microbiol 2021; 11:622402. [PMID: 33928041 PMCID: PMC8076636 DOI: 10.3389/fcimb.2021.622402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 03/22/2021] [Indexed: 11/13/2022] Open
Abstract
Aspergillus fumigatus is an opportunistic, ubiquitous, saprophytic mold which can cause infection in the lungs, nose, eyes, brain, and bones in humans, especially in immunocompromised patients. However, it is difficult to diagnose A. fumigatus infection quickly. Here, we introduce a new detection method, namely multiple cross displacement amplification (MCDA) combined with nanoparticle-based lateral flow biosensor (LFB) (MCDA-LFB), which was proved to be fast, reliable, and simple for detecting A. fumigatus. We designed a set of 10 primers targeting the gene annexin ANXC4 of A. fumigatus. The best MCDA condition is 66 °C for 35 min. The minimum concentration that can be detected by this method was 10 fg. In the case of 100 sputum samples, 20 (20%) and 15 (15%) samples were positive by MCDA-LFB and PCR method, respectively. MCDA-LFB and traditional culture method showed the same results. Compared with the culture method, the diagnostic accuracy of MCDA-LFB can reach 100%. It showed that the MCDA-LFB method has better detection ability than the PCR method. We found that the whole process could be controlled within 60 min including the preparation of DNA (20 min), MCDA reaction (35 min) and results reporting (2 min). These results show that this assay is suitable for the rapid, sensitive and specific detection of A. fumigatus in clinical samples.
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Affiliation(s)
- Luxi Jiang
- Department of Respiratory Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Xiaomeng Li
- Department of Respiratory Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China.,Graduate School of Clinical Medicine, Bengbu Medical College, Bengbu, China
| | - Rumeng Gu
- Department of Respiratory Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China.,Graduate School of Clinical Medicine, Bengbu Medical College, Bengbu, China
| | - Deguang Mu
- Department of Respiratory Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China
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15
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Zhu X, Wang X, Li S, Luo W, Zhang X, Wang C, Chen Q, Yu S, Tai J, Wang Y. Rapid, Ultrasensitive, and Highly Specific Diagnosis of COVID-19 by CRISPR-Based Detection. ACS Sens 2021; 6:881-888. [PMID: 33645226 PMCID: PMC7945583 DOI: 10.1021/acssensors.0c01984] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 02/01/2021] [Indexed: 12/26/2022]
Abstract
Coronavirus Disease 2019 (COVID-19), which is caused by SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2), has rapidly spread leading to a global pandemic. Here, we combined multiple cross displacement amplification (MCDA) with CRISPR-Cas12a-based detection to develop a novel diagnostic test (MCCD) and applied for the diagnosis of COVID-19, called COVID-19 MCCD. The MCCD protocol conducts reverse transcription MCDA (RT-MCDA) reaction for RNA templates followed by CRISPR-Cas12a/CrRNA complex detection of predefined target sequences after which degradation of a single-strand DNA (ssDNA) molecule confirms detection of the target sequence. Two MCDA primer sets and two CrRNAs were designed targeting the opening reading frame 1a/b (ORF1ab) and nucleoprotein (N) of SARS-CoV-2. The optimal conditions include two RT-MCDA reactions at 63 °C for 35 min and a CRISPR-Cas12a/CrRNA detection reaction at 37 °C for 5 min. The COVID-19 MCCD assay can be visualized on a lateral flow biosensor (LFB) and completed within 1 h including RNA extraction (15 min), RT-MCDA reaction (35 min), CRISPR-Cas12a/CrRNA detection reaction (5 min), and reporting of result (within 2 min). The COVID-19 MCCD assay is very sensitive and detects the target gene with as low as seven copies per test and does not cross-react with non-SARS-CoV-2 templates. SARS-CoV-2 was detected in 37 of 37 COVID-19 patient samples, and nonpositive results were detected from 77 non-COVID-19 patients. Therefore, the COVID-19 MCCD assay is a useful tool for the reliable and quick diagnosis of SARS-CoV-2 infection.
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Affiliation(s)
- Xiong Zhu
- Central and Clinical Laboratory of Sanya
People’s Hospital, Sanya, Hainan572000, People’s
Republic of China
| | - Xiaoxia Wang
- Central and Clinical Laboratory of Sanya
People’s Hospital, Sanya, Hainan572000, People’s
Republic of China
| | - Shijun Li
- Guizhou Provincial Center for Disease Control and
Prevention, Laboratory of Bacterial Infectious Disease of Experimental
Center, Guiyang550004, P. R. China
| | - Wenkai Luo
- Central and Clinical Laboratory of Sanya
People’s Hospital, Sanya, Hainan572000, People’s
Republic of China
| | - Xinping Zhang
- Central and Clinical Laboratory of Sanya
People’s Hospital, Sanya, Hainan572000, People’s
Republic of China
| | - Chongzhen Wang
- Central and Clinical Laboratory of Sanya
People’s Hospital, Sanya, Hainan572000, People’s
Republic of China
| | - Qian Chen
- Central and Clinical Laboratory of Sanya
People’s Hospital, Sanya, Hainan572000, People’s
Republic of China
| | - Shuyi Yu
- Central and Clinical Laboratory of Sanya
People’s Hospital, Sanya, Hainan572000, People’s
Republic of China
| | - Jun Tai
- Department of Otolaryngology, Head and Neck Surgery,
Children’s Hospital Capital Institute of Pediatrics,
Beijing100020, P. R. China
| | - Yi Wang
- Experimental Research Center, Capital
Institute of Pediatrics, Beijing100020, P. R.
China
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16
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Yan L, Zhao F, Niu L, Cai Y, Wu L, Zhu X, Nong J, Hu S. Simultaneous detection of Streptococcuspneumoniae and prevention of carryover contamination using multiple cross displacement amplification with Antarctic thermal sensitive uracil-DNA-glycosylase and a lateral flow biosensor. FEMS Microbiol Lett 2021; 368:6104480. [PMID: 33469645 DOI: 10.1093/femsle/fnab006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 01/15/2021] [Indexed: 11/12/2022] Open
Abstract
Streptococcus pneumoniae is an important clinical pathogenic bacterium that is the primary cause of meningitis, septicemia and community-acquired pneumonia. The mortality rate of pneumococcal disease is high, especially in children younger than 5-years-old. Rapid and accurate detection of S.pneumoniae is critical for clinical diagnosis. A ply gene-based multiple cross displacement amplification (MCDA) assay, amplifying DNA under 65°C for 40 min, was established to detect S.pneumoniae. Antarctic thermal sensitive uracil-DNA-glycosylase (AUDG) was applied to prevent carryover contamination. A lateral flow biosensor (LFB) was used to indicate the MCDA results. The ply-MCDA assay could detect as low as 10 fg of S. pneumoniae DNA and 447 colony forming units (CFU)/mL of spiked sputum samples. The analytical sensitivity of the ply-MCDA assay to detect clinical specimens was 100 times higher than that of PCR. The specificity of the ply-MCDA assay was evaluated using 15 S.pneumoniae strains and 25 non-S. pneumoniae strains, which confirmed the high selectivity of the ply-MCDA assay for S.pneumoniae. The AUDG enzyme could effectively eliminate carryover contamination and thus prevented false-positive results. In conclusion, ply-AUDG-MCDA-LFB is a simple, rapid and accurate method to detect S.pneumoniae.
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Affiliation(s)
- Linlin Yan
- Department of Clinical Laboratory, Peking University Shougang Hospital, No. 9 Jinyuanzhuang Road, Shijingshan District, Beijing 100144, China
| | - Fan Zhao
- Department of Clinical Laboratory, Peking University Shougang Hospital, No. 9 Jinyuanzhuang Road, Shijingshan District, Beijing 100144, China
| | - Lina Niu
- Department of Pathogen Biology, School of Basic Medicine and Life Science, Hainan Medical University, No. 3 Xueyuan Road, Longhua district, Haikou 571101, China
| | - Yu Cai
- Department of Clinical Laboratory, Peking University Shougang Hospital, No. 9 Jinyuanzhuang Road, Shijingshan District, Beijing 100144, China
| | - Lei Wu
- Department of Clinical Laboratory, Peking University Shougang Hospital, No. 9 Jinyuanzhuang Road, Shijingshan District, Beijing 100144, China
| | - Xiaoxue Zhu
- Department of Clinical Laboratory, Peking University Shougang Hospital, No. 9 Jinyuanzhuang Road, Shijingshan District, Beijing 100144, China
| | - Jinqing Nong
- Department of Clinical Laboratory, Peking University Shougang Hospital, No. 9 Jinyuanzhuang Road, Shijingshan District, Beijing 100144, China
| | - Shoukui Hu
- Department of Clinical Laboratory, Peking University Shougang Hospital, No. 9 Jinyuanzhuang Road, Shijingshan District, Beijing 100144, China
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17
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Cheng X, Dou Z, Yang J, Gu Y, Liu D, Xie L, Ren T, Liu Y, Yu Z, Tang Y, Wang M. Highly Sensitive and Rapid Identification of Streptococcus agalactiae Based on Multiple Cross Displacement Amplification Coupled With Lateral Flow Biosensor Assay. Front Microbiol 2020; 11:1926. [PMID: 32983004 PMCID: PMC7485445 DOI: 10.3389/fmicb.2020.01926] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 07/22/2020] [Indexed: 12/30/2022] Open
Abstract
Streptococccus agalactiae (S. agalactiae) is an important neonatal pathogen that is associated with mortality and morbidity. Therefore, we developed a rapid, accurate, and sensitive method based on multiple cross displacement amplification (MCDA) for the detection of the target pathogen. Four sets of MCDA primers were designed for targeting the S. agalactiae-specific groEL gene, and one set of MCDA primers with the optimum amplification efficiency was screened for establishing the S. agalactiae-MCDA assay. As a result, the newly-developed assay could be conducted at a fixed temperature (61°C) for only 30 min, eliminating the use of complex instruments. A portable and user-friendly nanoparticle-based lateral flow biosensor (LFB) assay was employed for reporting MCDA results within 2 min. Our results suggested that the detection limit of the S. agalactiae-MCDA-LFB assay is 300 fg per reaction, and no cross-reaction occurred with non-S. agalactiae strains. For 260 vaginal and rectal swabs, the detection rate of the MCDA-LFB assay was 7.7%, which was in accordance with the reference method of enrichment/qPCR, and higher by 4.6% than the CHROMagar culture. Moreover, the total procedure time of the MCDA-LFB assay was around 50 min, including sample collection, template preparation, MCDA reaction, and result reporting. Therefore, the MCDA-LFB assay is superior to enrichment/qPCR and CHROMagar culture and has great promise for point-of-care testing of S. agalactiae from vaginal and rectal swabs of pregnant women in resource-limited settings.
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Affiliation(s)
- Xueqin Cheng
- Department of Respiratory and Critical Care Medicine, Taihe Hospital, Hubei University of Medicine, Shiyan, China.,Hubei Key Laboratory of Embryonic Stem Cell Research, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Zhiqian Dou
- Department of Gynaecology and Obstetrics, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Jing Yang
- Department of Pharmacy, Wuhan General Hospital of the Chinese People's Liberation Army, Wuhan, China
| | - Yulong Gu
- Department of Clinical Laboratory, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Dexi Liu
- Department of Stomatology, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Ling Xie
- Department of Dermatology, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Tao Ren
- Department of Respiratory and Critical Care Medicine, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Yan Liu
- Department of Respiratory and Critical Care Medicine, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Zhifang Yu
- Department of Respiratory and Critical Care Medicine, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Yijun Tang
- Department of Respiratory and Critical Care Medicine, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Meifang Wang
- Department of Respiratory and Critical Care Medicine, Taihe Hospital, Hubei University of Medicine, Shiyan, China
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18
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Li DX, Shu GL, Wang WJ, Wu Y, Niu HC. Simple, Rapid and Sensitive Detection of Pseudomonas aeruginesa by Colorimetric Multiple Cross Displacement Amplification. Curr Med Sci 2020; 40:372-379. [PMID: 32337699 DOI: 10.1007/s11596-020-2169-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 03/15/2020] [Indexed: 11/28/2022]
Abstract
Pseudomonas aeruginosa (P. aeruginosa) is a major opportunistic pathogen in hospital-acquired infections. Thus, early diagnosis is the best strategy for fighting against these infections. In this report, we incorporated multiple cross displacement amplification (MCDA) combined with the malachite green (MG) for rapid, sensitive, specific and visual detection of P. aeruginosa by targeting the oprl gene. The MCDA-MG assay was conducted at 67°C for only 40 min during the amplification stage, and then products were directly detected by using colorimetric indicators (MG), eliminating the use of an electrophoresis instrument or amplicon analysis equipment. The entire process, including specimen processing (35 min), amplification (40 min) and detection (5 min), can be finished within 80 min. All 30 non-P. aeruginosa strains tested negative, indicating the high specificity of the MCDA primers. The analytical sensitivity of the MCDA-MG assay was 100 fg of genomic templates per reaction in pure culture, which was in complete accordance with MCDA by gel electrophoresis and real-time turbidity. The assay was also successfully applied to detecting P. aeruginosa in stool samples. Therefore, the rapidity, simplicity, and nearly equipment-free platform of the MCDA-MG technique make it possible for clinical diagnosis, and more.
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Affiliation(s)
- Dong-Xun Li
- Changping District Center for Disease Control and Prevention, Beijing, 102206, China.
| | - Gao-Lin Shu
- Changping District Center for Disease Control and Prevention, Beijing, 102206, China
| | - Wei-Jun Wang
- Changping District Center for Disease Control and Prevention, Beijing, 102206, China
| | - Yang Wu
- Changping District Center for Disease Control and Prevention, Beijing, 102206, China
| | - Huan-Cai Niu
- Changping District Center for Disease Control and Prevention, Beijing, 102206, China
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Chen X, Ma K, Yi X, Xiao Z, Xiong L, Wang Y, Li S. A Novel Detection of Enterococcus faecalis Using Multiple Cross Displacement Amplification Linked with Gold Nanoparticle Lateral Flow Biosensor. Infect Drug Resist 2019; 12:3771-3781. [PMID: 31824177 PMCID: PMC6900465 DOI: 10.2147/idr.s235325] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 11/22/2019] [Indexed: 02/06/2023] Open
Abstract
Background Enterococcus faecalis, an opportunistic bacterial pathogen, is one of the most frequently isolated bacterial species and cause of serious nosocomial infections in recent decades. A reliable and rapid assay for E. faecalis detection is significant for the diagnosis and follow-up treatment. Methods A novel assay method, named multiple cross displacement amplification linked with nanoparticle-based lateral flow biosensor (MCDA-LFB), was applied for detecting E. faecalis strains. A set of special 10 primers was designed according to E. faecalis-specific gene Ef0027. The MCDA amplification conditions, including the target DNA concentration, reaction temperature and time, were optimized. The sensitivity and specificity of MCDA method were tested in the current study, and then, the MCDA-LFB technology was applied to detect the E. faecalis strain from clinical samples. Results The E. faecalis specific primers were valid for the establishment of MCDA-LFB technology forthe detection of E. faecalis based on the Ef0027 gene. The MCDA amplification condition was optimized at 62°C for 35 min. The MCDA products were directly sensed and displayed with a biosensor. The full process, comprising genomic DNA template preparation (approximately 30 mins), amplification of MCDA (35 mins), and the product identification (approximately 2 mins), could be achieved in 70 mins. The MCDA technique could detect as little as 10 fg per reaction system of pure E. faecalis genomic DNA. The specificity of E. faecalis-MCDA-LFB method is 100%, with no cross-reactions to non-E. faecalis strains. Conclusion The MCDA-LFB technique established in the present study is a reliable, simple, rapid, sensitive and specific method to assay E. faecalis and can be applied for the detection of clinical samples.
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Affiliation(s)
- Xu Chen
- Central Laboratory of the Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550003, People's Republic of China.,Laboratory of Bacterial Infectious Disease of Experimental Centre, Guizhou Provincial Centre for Disease Control and Prevention, Guiyang, Guizhou 550004, People's Republic of China
| | - Kai Ma
- Clinical Laboratory Centre of the Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550003, People's Republic of China
| | - Xu Yi
- Central Laboratory of the Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550003, People's Republic of China
| | - Ziyu Xiao
- School of Public Health, Guizhou Medical University, Guiyang, Guizhou 550025, People's Republic of China
| | - Lijuan Xiong
- Clinical Laboratory Centre of the Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550003, People's Republic of China
| | - Yu Wang
- Department of Clinical Laboratory Centre, The First People's Hospital of Guiyang, Guiyang, Guizhou 550004, People's Republic of China
| | - Shijun Li
- Laboratory of Bacterial Infectious Disease of Experimental Centre, Guizhou Provincial Centre for Disease Control and Prevention, Guiyang, Guizhou 550004, People's Republic of China
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20
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Wang Y, Wang Y, Quan S, Jiao W, Li J, Sun L, Wang Y, Qi X, Wang X, Shen A. Establishment and Application of a Multiple Cross Displacement Amplification Coupled With Nanoparticle-Based Lateral Flow Biosensor Assay for Detection of Mycoplasma pneumoniae. Front Cell Infect Microbiol 2019; 9:325. [PMID: 31608243 PMCID: PMC6767991 DOI: 10.3389/fcimb.2019.00325] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 08/28/2019] [Indexed: 12/15/2022] Open
Abstract
Mycoplasma pneumoniae (M. pneumoniae) is responsible for pneumonia, and is a causative agent of other respiratory tract infections (e.g., bronchiolitis and tracheobronchitis). Herein, we established and applied a multiple cross displacement amplification (MCDA) coupled with a nanoparticle-based lateral flow biosensor (LFB) assay (MCDA–LFB) for rapid, simple, and reliable detection of target pathogen. A set of 10 primers was designed based on M. pneumoniae-specific P1 gene, and optimal reaction conditions were found to be 30 min at 65°C. The detection results were visually reported using a biosensor within 2 min. The M. pneumoniae–MCDA–LFB method specifically detected only M. pneumoniae templates, and no cross-reactivity was generated from non-M. pneumoniae isolates. The analytical sensitivity for this assay was 50 fg of genomic templates in the pure cultures, as obtained from colorimetric indicator and real-time turbidimeter analysis. The assay was applied to 197 oropharyngeal swab samples collected from children highly suspected of M. pneumoniae infection, and compared to culture-based method and real-time PCR assay. The detection rates of M. pneumoniae using a culture-based method, real-time PCR assay, and MCDA–LFB assay were 8.1%, 33.0%, and 52.3%, respectively, which indicated that the MCDA–LFB assay was superior to the culture-based method and real-time PCR method for detection of target agent. Using this protocol, 25 min for rapid template extraction followed by MCDA reaction (30 min) combined with LFB detection (2 min) resulted in a total assay time of ~60 min. In conclusion, the MCDA–LFB assay established in this report was a simple, rapid, sensitive, and reliable assay to detect M. pneumoniae strains, and can be used as a potential diagnostic tool for M. pneumoniae in basic and clinical laboratories.
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Affiliation(s)
- Yacui Wang
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Diseases, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Yi Wang
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Diseases, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Shuting Quan
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Diseases, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Weiwei Jiao
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Diseases, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Jieqiong Li
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Diseases, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Lin Sun
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Diseases, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Yonghong Wang
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Diseases, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Xue Qi
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Diseases, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Xingyun Wang
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Diseases, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Adong Shen
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Diseases, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
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21
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Jiao WW, Wang Y, Wang GR, Wang YC, Xiao J, Sun L, Li JQ, Wen SA, Zhang TT, Ma Q, Huang HR, Shen AD. Development and Clinical Validation of Multiple Cross Displacement Amplification Combined With Nanoparticles-Based Biosensor for Detection of Mycobacterium tuberculosis: Preliminary Results. Front Microbiol 2019; 10:2135. [PMID: 31572340 PMCID: PMC6753184 DOI: 10.3389/fmicb.2019.02135] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 08/30/2019] [Indexed: 11/25/2022] Open
Abstract
Tuberculosis is still a major threat to global public health. Here, a novel diagnosis assay, termed as multiple cross displacement amplification combined with nanoparticle-based lateral flow biosensor (MCDA-LFB), was developed to simultaneously detect IS6110 and IS1081 of Mycobacterium tuberculosis (MTB) in DNA extracted from reference strain H37Rv and clinical samples. The amplification can be finished within 30 min at a fixed temperature (67°C), thus the whole procedure, including rapid template preparation (15 min), isothermal reaction (30 min) and result reporting (2 min), can be completed within 50 min. The limit of detection of multiplex MCDA assay was 10 fg per reaction. By using the multiplex MCDA protocol, cross-reaction with non-mycobacteria and non-tuberculous mycobacteria (NTM) strains was not observed. Among clinically diagnosed TB patients, the sensitivity of liquid culture, Xpert MTB/RIF and multiplex MCDA assay was 42.0% (50/119), 49.6% (59/119), and 88.2% (105/119), respectively. Among culture positive samples, the sensitivity of Xpert MTB/RIF and multiplex MCDA assay was 86.0% (43/50) and 98.0% (49/50), respectively. Among culture negative samples, the sensitivity of Xpert MTB/RIF and multiplex MCDA assay was 23.2% (16/69) and 81.2% (56/69), respectively. The specificity was 100% (60/60) for Xpert MTB/RIF and 98.3% (59/60) for multiplex MCDA. Therefore, the multiplex MCDA assay for MTB detection is rapid, sensitive and easy to use and may be a promising test for early diagnosis of TB.
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Affiliation(s)
- Wei-Wei Jiao
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Yi Wang
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Gui-Rong Wang
- National Tuberculosis Clinical Laboratory, Beijing Key Laboratory for Drug Resistance Tuberculosis Research, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - Ya-Cui Wang
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Jing Xiao
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Lin Sun
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Jie-Qiong Li
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Shu-An Wen
- National Tuberculosis Clinical Laboratory, Beijing Key Laboratory for Drug Resistance Tuberculosis Research, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - Ting-Ting Zhang
- National Tuberculosis Clinical Laboratory, Beijing Key Laboratory for Drug Resistance Tuberculosis Research, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - Qi Ma
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Hai-Rong Huang
- National Tuberculosis Clinical Laboratory, Beijing Key Laboratory for Drug Resistance Tuberculosis Research, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - A-Dong Shen
- Key Laboratory of Major Diseases in Children, Ministry of Education, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Disease, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
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Li S, Liu C, Liu Y, Ma Q, Wang Y, Wang Y. Development of a multiple cross displacement amplification combined with nanoparticles-based biosensor assay to detect Neisseria meningitidis. Infect Drug Resist 2019; 12:2077-2087. [PMID: 31406466 PMCID: PMC6642637 DOI: 10.2147/idr.s210735] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 06/17/2019] [Indexed: 01/16/2023] Open
Abstract
Background Neisseria meningitidis is a leading pathogen of meningococcal disease in humans worldwide. Multiple cross displacement mplification (MCDA) combined with nanoparticles-based lateral flow biosensor (MCDA-LFB) has been reported for the rapid detection of several bacterial pathogens in recent years. Here, therefore we developed an MCDA-LFB assay for the rapid detection of N. meningitis. Methods A set of 10 primers specifically to recognize 10 different regions of the ctrA gene of N. meningitidis were designed. MCDA was developed and combined with a LFB to detect the ctrA gene of N. meningitidis. The reaction time and temperature condition for the MCDA-LFB were optimized and then the MCDA-LFB was applied to detect the DNA from clinical samples. Results MCDA-LFB assay was successfully established for the detection of N. meningitidis based on the ctrA gene. The MCDA assay was optimized at 64°C for only 35 mins and the products of amplification were directly sensed by LFB. The whole operation, including DNA template preparation (~20 mins), MCDA reaction (35 mins) and results interpretation (~2 mins) could be finished in no more than 60 mins. The detection limit was as low as 10 fg/reaction (around 3 CFUs/reaction) of pure N. meningitidis DNA, with no cross-reaction with other bacterial DNA. Conclusion The MCDA-LFB techniques developed in the present study are an effective tool for the rapid detection of N. meningitidis, especially in resource-poor countries in meningococcal disease epidemic period.
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Affiliation(s)
- Shijun Li
- Laboratory of Bacterial Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, 550004, People's Republic of China
| | - Chunting Liu
- Laboratory of Bacterial Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, 550004, People's Republic of China
| | - Ying Liu
- Laboratory of Bacterial Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, 550004, People's Republic of China
| | - Qing Ma
- Laboratory of Bacterial Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, 550004, People's Republic of China
| | - Yue Wang
- Laboratory of Bacterial Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, 550004, People's Republic of China
| | - Yi Wang
- Key Laboratory of Major Diseases in Children, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 10045, People's Republic of China.,Ministry of Education, National Key Discipline of Pediatrics (Capital Medial University), Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health , Beijing, 10045, People's Republic of China
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Gong L, Liu E, Che J, Li J, Liu X, Xu H, Liang J. Multiple Cross Displacement Amplification Coupled With Gold Nanoparticles-Based Lateral Flow Biosensor for Detection of the Mobilized Colistin Resistance Gene mcr-1. Front Cell Infect Microbiol 2019; 9:226. [PMID: 31316917 PMCID: PMC6610462 DOI: 10.3389/fcimb.2019.00226] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 06/11/2019] [Indexed: 01/21/2023] Open
Abstract
Fast dissemination of the mobilized colistin resistance (mcr) gene mcr-1 in Enterobacteriaceae causes a huge threat to the treatment of severe infection. In the current report, a multiple cross displacement amplification (MCDA) coupled with the detection of amplified products by gold nanoparticles-based lateral flow biosensor (LFB) assay (MCDA-LFB) was established to identify the mcr-1 gene with simpleness, rapidity, specificity, and sensitivity. The MCDA-LFB assay was performed at a isothermal temperature (63°C) for only 30 min during the amplification stage, and the reaction products were directly identified by using LFB which obtained the result within 2 min. The entire process of experiments, from templates extraction to result judging, was accomplished in <60 min. For the analytical specificity of this method, all of the 16 mcr-1-producing strains were positive, and all of the non-mcr-1 isolates produced the negative results. The sensitivity of mcr-1-MCDA-LFB assay was as little as 600 fg of plasmid DNA per reaction in pure culture, and approximately 4.5 × 103 CFU/mL (~4.5 CFU/reaction) in spiked fecal samples. Therefore, this technique established in the present study is suitable for the surveillance of mcr-1 gene in clinic and livestock industry.
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Affiliation(s)
- Lin Gong
- Department of Disinfection and Pest Control, Wuhan Centers for Disease Prevention and Control, Wuhan, China
| | - Ernan Liu
- Department of Disinfection and Pest Control, Wuhan Centers for Disease Prevention and Control, Wuhan, China
| | - Jie Che
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, Chinese Center for Disease Control and Prevention, National Institute for Communicable Disease Control and Prevention, Beijing, China
| | - Juan Li
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, Chinese Center for Disease Control and Prevention, National Institute for Communicable Disease Control and Prevention, Beijing, China
| | - Xiaoli Liu
- Department of Disinfection and Pest Control, Wuhan Centers for Disease Prevention and Control, Wuhan, China
| | - Huiqiong Xu
- Department of Disinfection and Pest Control, Wuhan Centers for Disease Prevention and Control, Wuhan, China
| | - Jiansheng Liang
- Department of Disinfection and Pest Control, Wuhan Centers for Disease Prevention and Control, Wuhan, China
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Zhao F, Niu L, Yan L, Nong J, Wang C, Wang J, Gao N, Zhu X, Wu L, Zheng F, Hu S. Establishment and Application of Multiple Cross Displacement Amplification Coupled With Lateral Flow Biosensor (MCDA-LFB) for Visual and Rapid Detection of Candida albicans in Clinical Samples. Front Cell Infect Microbiol 2019; 9:102. [PMID: 31058099 PMCID: PMC6477880 DOI: 10.3389/fcimb.2019.00102] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 03/25/2019] [Indexed: 12/24/2022] Open
Abstract
Candida albicans is an opportunistic pathogenic yeast that predominantly causes invasive candidiasis. The conventional diagnosis of C. albicans infection depends on time-consuming, culture-based gold-standard methods. Here, a multiple cross displacement amplification (MCDA) assay, combined with a gold nanoparticle-based lateral flow biosensor (LFB) visualization method, was developed for the rapid detection of C. albicans. The internal transcribed spacer II, a region between 5.8 and 28 S fungal ribosomal DNA, is a C. albicans species-specific sequence that was used as the MCDA assay target. As an isothermal amplification method, the MCDA reaction with optimized conditions could be completed within only 40 min at a constant temperature (64°C). Then, the amplification reaction products could be visibly detected by a LFB without special equipment. The developed MCDA-LFB assay for C. albicans detection was a specific and accurate method, and could distinguish C. albicans from other pathogens. Just 200 fg of genomic DNA template from pure cultures of C. albicans could be detected using the MCDA-LFB method. The limit of detection (LOD) of the new method was more sensitive than that of both qPCR and loop-mediated isothermal amplification (LAMP). Of 240 clinical sputum samples, all of the C. albicans-positive (87/240) samples identified by the gold-standard method were successfully detected by the MCDA-LFB assay. Moreover, the true positive rate of the newly developed assay was not only higher than that of qPCR (100 vs. 86.2%), but also higher than that of LAMP (100 vs. 94.3%). Thus, the MCDA-LFB assay might be a simple, specific, and sensitive method for the rapid diagnosis of C. albicans in clinical samples.
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Affiliation(s)
- Fan Zhao
- Department of Clinical Laboratory, Peking University Shougang Hospital, Beijing, China
| | - Lina Niu
- Department of Pathogen Biology, School of Basic Medicine and Lifescience, Hainan Medical University, Haikou, China.,Key Laboratory of Translation Medicine Tropical Diseases, Haikou, China.,Hainan Medical University-University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, Haikou, China
| | - Linlin Yan
- Department of Clinical Laboratory, Peking University Shougang Hospital, Beijing, China
| | - Jinqing Nong
- Department of Clinical Laboratory, Peking University Shougang Hospital, Beijing, China
| | - Chunmei Wang
- Department of Clinical Laboratory, Peking University Shougang Hospital, Beijing, China
| | - Jing Wang
- Department of Clinical Laboratory, Peking University Shougang Hospital, Beijing, China
| | - Naishu Gao
- Department of Clinical Laboratory, Peking University Shougang Hospital, Beijing, China
| | - Xiaoxue Zhu
- Department of Clinical Laboratory, Peking University Shougang Hospital, Beijing, China
| | - Lei Wu
- Department of Clinical Laboratory, Peking University Shougang Hospital, Beijing, China
| | - Fengzhi Zheng
- Department of Clinical Laboratory, Peking University Shougang Hospital, Beijing, China
| | - Shoukui Hu
- Department of Clinical Laboratory, Peking University Shougang Hospital, Beijing, China
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Wang Y, Li H, Wang Y, Zhang L, Zhang J, Xu J, Ye C. Nanoparticle-based lateral flow biosensor combined with multiple cross displacement amplification for rapid, visual and sensitive detection of Vibrio cholerae. FEMS Microbiol Lett 2018; 364:4636548. [PMID: 29155937 DOI: 10.1093/femsle/fnx234] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Accepted: 11/15/2017] [Indexed: 11/13/2022] Open
Abstract
Vibrio cholerae is an important human pathogen that is responsible for cholera, a severe acute watery diarrhea. In the current study, a multiple cross displacement amplification (MCDA) coupled with amplicon detection by chromatographic lateral flow biosensor (LFB) method (MCDA-LFB) was successfully established and evaluated for the identification of V. cholerae. A set of 10 primers was designed specifically to recognize 10 different regions of the V. cholerae-specific gene ompW. The optimized time and temperature conditions for the MCDA were 30 min and 63°C, respectively. The MCDA-LFB assay correctly identified 31 strains of V. cholerae but did not detect 13 non-cholerae Vibrio strains and 30 non-Vibrio strains. The sensitivity of MCDA-LFB for target pathogen detection in pure culture was 10 fg per reaction. In the case of spiked shrimp samples without enrichment, the limit of detection was 4.1 CFUs per reaction or equivalent to 4.1 × 102 CFU g-1. The whole process, including shrimp homogenates processing (30 min), MCDA reaction (30 min) and results reporting (2 min), could be finished within 65 min. These results show that this assay is suitable for the rapid, sensitive and specific detection of V. cholerae in food, environmental and clinical samples.
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Affiliation(s)
- Yi Wang
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention, Changping, Beijing 102206, PR, China
| | - Hui Li
- Department of Microbiology, GuiZhou Medical University, Guiyang, Guizhou 550004, PR China
| | - Yan Wang
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention, Changping, Beijing 102206, PR, China
| | - Lu Zhang
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention, Changping, Beijing 102206, PR, China
| | - Jingyun Zhang
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention, Changping, Beijing 102206, PR, China
| | - Jianguo Xu
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention, Changping, Beijing 102206, PR, China
| | - Changyun Ye
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention, Changping, Beijing 102206, PR, China
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Wang Y, Li H, Li D, Li K, Wang Y, Xu J, Ye C. Multiple Cross Displacement Amplification Combined with Gold Nanoparticle-Based Lateral Flow Biosensor for Detection of Vibrio parahaemolyticus. Front Microbiol 2016; 7:2047. [PMID: 28066368 PMCID: PMC5177632 DOI: 10.3389/fmicb.2016.02047] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 12/06/2016] [Indexed: 12/21/2022] Open
Abstract
Vibrio parahaemolyticus (V. parahaemolyticus) is a marine seafood-borne pathogen causing severe illnesses in humans and aquatic animals. In the present study, multiple cross displacement amplification was combined with a lateral flow biosensor (MCDA-LFB) to detect the toxR gene of V. parahaemolyticus in DNA extracts from pure cultures and spiked oyster homogenates. Amplification was carried out at a constant temperature (62°C) for only 30 min, and amplification products were directly applied to the biosensor. The entire process, including oyster homogenate processing (30 min), isothermal amplification (30 min) and results indicating (∼2 min), could be completed within 65 min. Amplification product was detectable from as little as 10 fg of pure V. parahaemolyticus DNA and from approximately 4.2 × 102 CFU in 1 mL of oyster homogenate. No cross-reaction with other Vibrio species and with non-Vibrio species was observed. Therefore, the MCDA-LFB method established in the current report is suitable for the rapid screening of V. parahaemolyticus in clinical, food, and environmental samples.
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Affiliation(s)
- Yi Wang
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention Beijing, China
| | - Hui Li
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and PreventionBeijing, China; Department of Microbiology, Guizhou Medical UniversityGuiyang, China
| | - Dongxun Li
- Changping District Center for Disease Control and Prevention Beijing, China
| | - Kewei Li
- Institute of Microbiology, Jilin Provincial Center for Disease Control and Prevention Changchun, China
| | - Yan Wang
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention Beijing, China
| | - Jianguo Xu
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention Beijing, China
| | - Changyun Ye
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention Beijing, China
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Wang Y, Wang Y, Xu J, Ye C. Development of Multiple Cross Displacement Amplification Label-Based Gold Nanoparticles Lateral Flow Biosensor for Detection of Shigella spp. Front Microbiol 2016; 7:1834. [PMID: 27917160 PMCID: PMC5114309 DOI: 10.3389/fmicb.2016.01834] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 11/01/2016] [Indexed: 11/16/2022] Open
Abstract
Shigella spp., the etiological agent of shigellosis or “bacillary dysentery,” are responsible for considerable morbidity and mortality in excess of a million deaths globally per year. Although PCR-based techniques (such as PCR-based dipstick biosensors) have been used for the molecular diagnosis of infectious disease, these assays were restricted due to the need for a sophisticated thermal cycling apparatus to denature target templates. To facilitate simple and rapid detection of target pathogens, we successfully devised an inexpensive, reliable and nearly instrument-free molecular technique, which incorporates multiple cross displacement amplification (MCDA) combined with a newly designed lateral flow biosensor (LFB) for visual, sensitive and specific detection of Shigella. The MCDA-LFB assay was conducted at 65°C for only 20 min during the amplification stage, and then products were directly analyzed on the biosensor, alleviating the use of special reagents, electrophoresis equipment and amplicon detection instruments. The entire process, including specimen processing (35 min), amplification (20) and detection (2–5 min), can be finished within 1 h. The MCDA-LFB assay demonstrated high specificity for Shigella detection. The analytical sensitivity of the assay was 10 fg of genomic templates per reaction in pure culture and 5.86 CFU per tube in human fecal samples, which was consistent with MCDA by colorimetric indicator, gel electrophoresis, real time turbidity and fluorescence detection. Hence, the simplicity, rapidity and nearly instrument-free platform of the MCDA-LFB assay make it practical for ‘on-site’ diagnosis, point-of-care testing and more. Moreover, the proof-of-concept approach can be reconfigured to detect a wide variety of target sequences by re-designing the specific MCDA primers.
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Affiliation(s)
- Yi Wang
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention Beijing, China
| | - Yan Wang
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention Beijing, China
| | - Jianguo Xu
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention Beijing, China
| | - Changyun Ye
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention Beijing, China
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