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Wu T, Shen C, Zhao Z, Lyu M, Bai H, Hu X, Zhao J, Zhang R, Qian K, Xu G, Ying B. Integrating Paper-Based Microfluidics and Lateral Flow Strip into Nucleic Acid Amplification Device toward Rapid, Low-Cost, and Visual Diagnosis of Multiple Mycobacteria. SMALL METHODS 2024:e2400095. [PMID: 38466131 DOI: 10.1002/smtd.202400095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/23/2024] [Indexed: 03/12/2024]
Abstract
Efficient diagnosis of mycobacterial infections can effectively manage and prevent the transmission of infectious diseases. Unfortunately, existing diagnostic strategies are challenged by long assay times, high costs, and highly specialized expertise to distinguish between pulmonary tuberculosis (PTB) and nontuberculous mycobacterial pulmonary diseases (NTM-PDs). Herein, in this study, an optimized 3D paper-based analytical device (µPAD) is incorporated with a closed lateral flow (LF) strip into a loop-mediated isothermal amplification (LAMP) device (3D-µPAD-LF-LAMP) for rapid, low-cost, and visual detection of pathogenic mycobacteria. The platform's microfluidic feature enhanced the nucleic acid amplification, thereby reducing the costs and time as compared to boiling, easyMAG, and QIAGEN techniques. Moreover, the LF unit is specifically designed to minimize aerosol contamination for a user-friendly and visual readout. 3D-µPAD-LF-LAMP is optimized and assessed using standard strains, demonstrating a limit of detection (LOD) down to 10 fg reaction-1 . In a cohort of 815 patients, 3D-µPAD-LF-LAMP displays significantly better sensitivity, specificity, negative predictive value (NPV), positive predictive value (PPV), and diagnostic accuracy than conventional bacterial culture and Xpert techniques. Collectively, 3D-µPAD-LF-LAMP demonstrates enhanced accessibility, efficiency, and practicality for the diagnosis of multiple pathogenic mycobacteria, which can be applied across diverse clinical settings, thereby ultimately improving public health outcomes.
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Affiliation(s)
- Tao Wu
- Department of Clinical Laboratory Medicine, People's Hospital of Ningxia Hui Autonomous Region, Ningxia Medical University, Ningxia Hui Autonomous Region, Yinchuan, 750001, China
| | - Chenlan Shen
- Department of Laboratory Medicine and National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, Sichuan Province, 610041, China
| | - Zhenzhen Zhao
- Department of Laboratory Medicine and National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, Sichuan Province, 610041, China
| | - Mengyuan Lyu
- Department of Laboratory Medicine and National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, Sichuan Province, 610041, China
| | - Hao Bai
- Department of Laboratory Medicine and National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, Sichuan Province, 610041, China
| | - Xuejiao Hu
- Division of Laboratory Medicine, Guangdong Provincial People's Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong Province, 510080, China
| | - Junwei Zhao
- Clinical Laboratory, The First Affiliated Hospital of Zhengzhou University, No.1 Jianshe Dong Road, ErQi District, Zhengzhou, Henan Province, China
| | - Ru Zhang
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Kun Qian
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Gaolian Xu
- Shanghai Sci-Tech InnoCenter for Infection & Immunity, Building A1, Bay Valley Science and Technology Park, Lane 1688, Guoquan North Road, Yangpu District, Shanghai, China
| | - Binwu Ying
- Department of Laboratory Medicine and National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, Sichuan Province, 610041, China
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Zhou M, Li X, Wen H, Huang B, Ren J, Zhang J. The construction of CRISPR/Cas9-mediated FRET 16S rDNA sensor for detection of Mycobacterium tuberculosis. Analyst 2023; 148:2308-2315. [PMID: 37083189 DOI: 10.1039/d3an00462g] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023]
Abstract
The simple and efficient detection of nucleic acids is important in the diagnosis of tuberculosis (TB) caused by Mycobacterium tuberculosis (M. tuberculosis). However, base mismatch will lead to false positive and false negative nucleic acid test, which seriously interferes with the accuracy of the final results. Herein, we demonstrated a CRISPR/Cas-9-mediated fluorescent strategy utilizing fluorescence resonance energy transfer (FRET) for the detection of bacteria. High-variable region of M. tuberculosis 16S rDNA fragment was used as the target, and CRISPR/Cas9 was used as the recognition element. The binding of the P1 probe of upconversion nanoparticles (UCNPs) @SiO2-P1 and the P2 probe of Fe3O4@Au-P2 caused the fluorescence quenching of UCNPs. In the presence of the target, the P2 probe hybridized with the target to form double-stranded DNA (dsDNA), which was recognized and cleaved by CRISPR/Cas9, resulting in the breaking of the P1-P2 duplex linkage. UCNPs moved away from Fe3O4@Au under a magnetic field, and the fluorescence signal was restored; bacteria were detected under the excitation of a 980 nm laser source. Using the CRISPR/Cas-9-mediated system, the sensor could distinguish single-base mismatches in 10 bases from the protospacer adjacent motif (PAM) region. The limit of detection (LOD) was 20 CFU mL-1 and the detection time was 2 h. It developed a new way of accurate nucleic acid detection for disease diagnosis.
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Affiliation(s)
- Ming Zhou
- Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, P. R. China.
| | - Xin Li
- Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, P. R. China.
| | - Herui Wen
- Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, P. R. China.
| | - Bin Huang
- Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, P. R. China.
| | - Jiali Ren
- Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Changsha, 410004, P. R. China.
| | - Jialin Zhang
- Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, P. R. China.
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
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Huang J, Liang Z, Liu Y, Zhou J, He F. Development of an MSPQC Nucleic Acid Sensor Based on CRISPR/Cas9 for the Detection of Mycobacterium tuberculosis. Anal Chem 2022; 94:11409-11415. [PMID: 35930710 DOI: 10.1021/acs.analchem.2c02538] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Accurate and rapid detection of nucleic acid plays a vital role in the clinical treatment of tuberculosis caused by Mycobacterium tuberculosis (M.TB). However, false-negative and false-positive results caused by base mismatches could affect the detection accuracy. Inspired by the unique property of CRISPR/Cas9, we proposed a new MSPQC M.TB sensor based on the CRISPR/Cas9 system, which can distinguish single-base mismatches in 10 bases from the protospacer adjacent motif (PAM) region. In the proposed sensor, single-stranded DNA on Au interdigital electrodes was used as a capture probe for the target and an initiator for hybridization chain reaction (HCR). HCR was used to generate long double-stranded DNA (dsDNA), which could span the Au interdigital electrodes. CRISPR/Cas9 was used as recognition components to recognize capture/target dsDNA. When the target existed, the capture probe hybridized with the target to form dsDNA, which could be recognized and cut by CRISPR/Cas9. Thus, the DNA connection between electrodes was cut off and resulted in the MSPQC response. When no target existed, the capture probe remained single-stranded and could not be recognized and cut by CRISPR/Cas9. Therefore, DNA connection between electrodes was reserved. Moreover, silver staining technology was utilized to improve the sensitivity of detection. M.TB was detected by the proposed sensor using specific sequence fragments of 16S rRNA of M.TB as the target. The detection time was down to 2.3 h. The limit of detection (LOD) was 30 CFU/mL.
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Affiliation(s)
- Ji Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Zi Liang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Yu Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Jiandang Zhou
- Department of Clinical Laboratory, The Third Xiangya Hospital, Xiangya Medical College of Central South University, Changsha 410208, P. R. China
| | - Fengjiao He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
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Zhao Z, Wu T, Wang M, Chen X, Liu T, Si Y, Zhou Y, Ying B. A new droplet digital PCR assay: improving detection of paucibacillary smear-negative pulmonary tuberculosis. Int J Infect Dis 2022; 122:820-828. [PMID: 35870796 DOI: 10.1016/j.ijid.2022.07.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 06/30/2022] [Accepted: 07/16/2022] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Smear-negative pulmonary tuberculosis (PTB) is difficult to diagnose. Current diagnosis and treatment monitoring methods have inherent limitations. Droplet digital PCR (ddPCR) is a new technique with high sensitivity. This study presents a novel ddPCR for rapid and sensitive identification of Mycobacterium tuberculosis (MTB). METHODS MTB DNA was detected in respiratory specimens from suspected PTB cases using ddPCR assay, which was directed at two different locations within IS6110. We, for the first time, evaluated the clinical diagnostic ability of this ddPCR for paucibacillary smear-negative PTB. RESULTS A total of 605 PTB suspects were recruited, including 263 confirmed PTB patients (84.03% from smear-negative PTB) and 342 non-PTB. The sensitivity and specificity of IS6110 ddPCR were 61.22% (95% confidence interval (CI), 55.00%-67.10%) and 95.03% (95% CI, 92.20%-97.10%) for total PTB, and 57.92% (95% CI, 51.10%-64.50%) and 94.57% (95% CI, 91.20%-96.90%) for smear-negative PTB. ddPCR assay outperformed Xpert MTB/RIF (53.08% vs. 28.46%, p = 0.020) in smear-negative PTB detection. Furthermore, effective anti-tuberculosis treatment was linked to significantly lower IS6110 copies detected by ddPCR. CONCLUSIONS Herein, we developed and validated a highly sensitive and robust ddPCR assay for MTB quantification in respiratory specimens, which improve diagnosis and therapeutic effect evaluation of smear-negative PTB.
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Affiliation(s)
- Zhenzhen Zhao
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Tao Wu
- Department of Clinical Laboratory Medicine, People's Hospital of Ningxia Hui Autonomous Region (First Affiliated Hospital of Northwest Minzu University), Yinchuan, Ningxia Hui Autonomous Region, China
| | - Minjin Wang
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Xiaojuan Chen
- Department of Laboratory Medicine, The People's Hospital of Leshan, Leshan, Sichuan, China
| | - Tangyuheng Liu
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yanjun Si
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yanhong Zhou
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Binwu Ying
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
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Zhang J, He F. Mycobacterium tuberculosis piezoelectric sensor based on AuNPs-mediated enzyme assisted signal amplification. Talanta 2022; 236:122902. [PMID: 34635273 DOI: 10.1016/j.talanta.2021.122902] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 09/13/2021] [Accepted: 09/19/2021] [Indexed: 10/20/2022]
Abstract
Rapid diagnosis of tuberculosis disease (TB) still remained a pressing need for TB control efforts all over the world. However, the existing detection approaches cannot satisfy demand of rapid detection of clinical Mycobacterium tuberculosis (M. tuberculosis) because of the long detection time and high cost. Herein, we proposed a new M. tuberculosis piezoelectric sensor based on AuNPs-mediated enzyme assisted signal amplification. A hairpin-shaped DNA duplex with a protrusion of the 3' end was designed. In the presence of specific 16 S rDNA fragment of M. tuberculosis, the hairpin probe was opened, which triggered the selective cleavage of hairpin probe by Exonuclease III (Exo III), resulting in the release of uncut DNA probe and target DNA. The released target DNA hybridized with another hairpin-shaped DNA duplex, and a new digestion cycle was started, thus generating large amounts of uncut DNA probes. The uncut DNA was pulled to the electrode surface by the hybridization with capture probe modified on the electrode. Subsequently detection probe labeled AuNPs was hybridized with uncut DNA and entered between the two electrodes. The AuNPs linked to hybridized detection probe were grown in the HAuCl4 and Nicotinamide adenine dinucleotide (NADH) solution and offered the conductive connection between the gaps of electrode. The changes were monitored by the piezoelectric sensor. The piezoelectric biosensor could achieve a detection of M. tuberculosis (102-108 CFU mL-1) within 3 h, the detection limit (LOD) was 30 CFU mL-1. The methodology could be transformed into different microbial targets, which is suitable for further development of small portable equipment and multifunctional detection.
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Affiliation(s)
- Jialin Zhang
- Institute of Molecular Materials Chemistry and Technology, School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, PR China; State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Fengjiao He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China.
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Evaluation of a new assay for nontuberculous mycobacteria species identification in diagnostic material and cultures. Tuberculosis (Edinb) 2021; 130:102124. [PMID: 34488079 DOI: 10.1016/j.tube.2021.102124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 08/30/2021] [Accepted: 09/01/2021] [Indexed: 11/21/2022]
Abstract
The purpose of the present study was to evaluate a real-time PCR system for 12 nontuberculous mycobacteria (NTM) species identification developed by Central Tuberculosis Research Institute (CTRI; Moscow, Russia) in cooperation with Syntol LLC (Moscow, Russia). NTM cultures (210 strains, 19 species), Mycobacterium tuberculosis complex (MTBC) cultures (21 strains, 2 species), non-mycobacterial microorganisms (18 strains, 13 species) were used for the first stage of the assay evaluation. Clinical samples (sputum, N = 973) positive for smear microscopy and MTBC/NTM DNA by a PCR-based screening assay collected from 819 patients were used for specificity and sensitivity evaluation. Sensitivity for determining the NTM species directly from diagnostic material was 99.71%, with the specificity of 100%. The sensitivity and specificity for NTM species identification in cultures was 99.67% and 100%, respectively. Both sensitivity and specificity for determining MTBC in cultures was 100%.
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7
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Twabi HH, Mukoka-Thindwa M, Shani D, Nliwasa M, Corbett EL. Non-Tuberculous Mycobacterial Pulmonary Disease identified during community-based screening for Mycobacterium Tuberculosis: a case report. Malawi Med J 2021; 33:65-67. [PMID: 34422236 PMCID: PMC8360289 DOI: 10.4314/mmj.v33i1.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
There is a rising prevalence of Non-Tuberculous Mycobacterial (NTM) disease in sub-Saharan Africa identified on culture specimens. However, distinguishing mycobacterial colonisations from infection from identified NTMs on culture in the sub-Saharan Africa setting remains to be established. A 49-year-old man presented with the cardinal symptoms of tuberculosis (TB) in a community TB prevalence survey in Blantyre, Malawi. Mycobacteriology was atypical, prompting a line probe assay which revealed Mycobacterium avium complex (MAC) species. The epidemiology of Mycobacterium tuberculosis complex (MTBC) is better known than that of NTM. Up-scaling culture and speciation may be a solution to this gap in knowledge of the burden of disease of NTM. Like most resource-poor settings, TB culture is not routinely done in the diagnosis and management of TB in Malawi. Furthermore, the treatment of NTM is not analogous to that of MTBC. The multi-drug regimens used for NTM disease treatment includes a newer macrolide (azithromycin, clarithromycin), ethambutol, and rifamycin, and require prolonged durations of therapy aimed at facilitating clearance of the mycobacteria and minimizing the emergence of drug resistance. Clinicians must thus be aware of this rising burden of NTM disease and consider other diagnostic options to better investigate this disease in patients.
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Affiliation(s)
- Hussein H Twabi
- Helse Nord Tuberculosis Initiative, University of Malawi, College of Medicine.,Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine.,London School of Hygiene and Tropical Medicine
| | - Madalo Mukoka-Thindwa
- Helse Nord Tuberculosis Initiative, University of Malawi, College of Medicine.,Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine.,London School of Hygiene and Tropical Medicine
| | - Doris Shani
- Helse Nord Tuberculosis Initiative, University of Malawi, College of Medicine
| | - Marriott Nliwasa
- Helse Nord Tuberculosis Initiative, University of Malawi, College of Medicine
| | - Elizabeth L Corbett
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine.,London School of Hygiene and Tropical Medicine
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Zhang Z, Fang J, Bo Y, Xue J, Liu J, Hong Z, Du Y. Terahertz and Raman Spectroscopic Investigation of Anti-tuberculosis Drug-Drug Cocrystallization Involving 4-aminosalicylic Acid and Pyrazinamide. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129547] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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9
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Kong L, Xie B, Liu Q, Hua L, Bhusal A, Bao C, Hu J, Xu S. Application of acid-fast staining combined with GeneXpert MTB/RIF in the diagnosis of non-tuberculous mycobacteria pulmonary disease. Int J Infect Dis 2021; 104:711-717. [PMID: 33460835 DOI: 10.1016/j.ijid.2020.12.091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/25/2020] [Accepted: 12/30/2020] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE To evaluate the clinical diagnostic value of positive acid-fast staining combined with negative GeneXpert MTB/RIF in the diagnosis of non-tuberculous mycobacteria pulmonary disease (NTM-PD). METHODS A total of 133 inpatients with confirmed NTM-PD were included consecutively between January 1, 2018 and December 31, 2019, at Tongji Hospital and Jinyintan Hospital, Tongji Medical College of Huazhong University of Science and Technology, in Wuhan, China. One hundred patients with confirmed pulmonary tuberculosis (PTB) were randomly included as the control group. RESULTS The sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of positive acid-fast staining combined with a negative GeneXpert MTB/RIF result were 51.13% (95% confidence interval (CI) 42.52-59.73%), 97.00% (95% CI 93.60-100.40%), 95.78% (95% CI 90.98-100.57%), and 59.88% (95% CI 52.25-67.51%), respectively. When subjects were limited to patients with positive acid-fast staining, the sensitivity of a negative GeneXpert MTB/RIF result was 88.31% (95% CI 80.97-95.65%). When acid-fast staining was conducted ≥3 times, the sensitivity of this combination diagnosis method increased to 61.67% (95% CI 49.00-74.33%). CONCLUSIONS Positive acid-fast staining combined with a negative GeneXpert MTB/RIF result could be an effective and time-saving method for the diagnosis of NTM-PD.
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Affiliation(s)
- Luxia Kong
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of the Health Ministry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Bangruan Xie
- Department of Tuberculosis and Infection, Wuhan Jinyintan Hospital, Wuhan, Hubei, China
| | - Qian Liu
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of the Health Ministry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Lijuan Hua
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of the Health Ministry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Anish Bhusal
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of the Health Ministry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Chen Bao
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of the Health Ministry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jiannan Hu
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of the Health Ministry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Shuyun Xu
- Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of the Health Ministry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
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Zhang Z, Wang Q, Xue J, Du Y, Liu J, Hong Z. Vibrational Spectroscopic Investigation into Novel Ternary Eutectic Formed between Pyrazinamide, Fumaric Acid, and Isoniazid. ACS OMEGA 2020; 5:17266-17274. [PMID: 32715212 PMCID: PMC7376892 DOI: 10.1021/acsomega.0c01486] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 06/22/2020] [Indexed: 06/11/2023]
Abstract
To improve the efficacy of anti-tuberculosis (anti-TB) therapy, drug-drug co-crystallization stands for an alternative approach to settle the tuberculosis problem. Directly co-crystallizing two typical parent anti-TB drugs (pyrazinamide, PZA and isoniazid, INH) into a single binary co-crystal could not be obtained successfully. Multicomponent eutectic are highly effective and useful for enhancing the dissolution rate, bioavailability, and physical stability of the poorly water-soluble active pharmaceutical ingredient (API) drugs, when the attempts of forming a binary co-crystal have failed. Therefore, the ternary eutectic composition conception was proposed in this study, in which fumaric acid (FA) was chosen as the molecule to connect two first-line anti-tubercular drugs. First of all, three starting materials (including PZA, INH, and FA) were grinded at a 1:1:1 molar ratio, the eutectic composition was investigated through vibrational spectroscopic techniques, including terahertz time-domain spectroscopy (THz-TDS) and Raman spectroscopy. Additionally, the density functional theory (DFT) was utilized to simulate the optimized structures and vibrational modes of two possible theoretical eutectic composition forms. The THz absorption spectrum of the theoretical form I shows much more consistency with the experimental results than that of form II. Raman spectra also help to characterize the differences in vibrational modes between the eutectic composition and the starting parent compounds. The results provide us with both structural information and intermolecular hydrogen bonding interactions within specific multicomponent eutectic composition formulations based on Raman and terahertz vibrational spectroscopic techniques in combination with theoretical calculations.
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Affiliation(s)
- Ziming Zhang
- Centre
for THz Research, China Jiliang University, Hangzhou 310018, Zhejiang, China
| | - Qiqi Wang
- Centre
for THz Research, China Jiliang University, Hangzhou 310018, Zhejiang, China
| | - Jiadan Xue
- Department
of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang, China
| | - Yong Du
- Centre
for THz Research, China Jiliang University, Hangzhou 310018, Zhejiang, China
| | - Jianjun Liu
- Centre
for THz Research, China Jiliang University, Hangzhou 310018, Zhejiang, China
| | - Zhi Hong
- Centre
for THz Research, China Jiliang University, Hangzhou 310018, Zhejiang, China
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11
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Trunzo NE, Hong KL. Recent Progress in the Identification of Aptamers Against Bacterial Origins and Their Diagnostic Applications. Int J Mol Sci 2020; 21:ijms21145074. [PMID: 32708376 PMCID: PMC7404326 DOI: 10.3390/ijms21145074] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 07/15/2020] [Accepted: 07/16/2020] [Indexed: 12/18/2022] Open
Abstract
Aptamers have gained an increasing role as the molecular recognition element (MRE) in diagnostic assay development, since their first conception thirty years ago. The process to screen for nucleic acid-based binding elements (aptamers) was first described in 1990 by the Gold Laboratory. In the last three decades, many aptamers have been identified for a wide array of targets. In particular, the number of reports on investigating single-stranded DNA (ssDNA) aptamer applications in biosensing and diagnostic platforms have increased significantly in recent years. This review article summarizes the recent (2015 to 2020) progress of ssDNA aptamer research on bacteria, proteins, and lipids of bacterial origins that have implications for human infections. The basic process of aptamer selection, the principles of aptamer-based biosensors, and future perspectives will also be discussed.
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12
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Kim HW, Lee CH, Lee JH. Clinical evaluation of an automated Real-Prep system for extracting nucleic acids to detect mycobacterial infection. J Microbiol Methods 2020; 174:105960. [PMID: 32442656 DOI: 10.1016/j.mimet.2020.105960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 05/11/2020] [Accepted: 05/18/2020] [Indexed: 10/24/2022]
Abstract
Real-time PCR tests have been widely used to detect mycobacterial infection. The quality of extracted DNA is crucial for obtaining accurate results of the real-time PCR tests, and automated extraction methods are faster and more effective than manual extraction. The novel Real-Prep automated extraction system has not yet been verified by direct comparisons to existing methods. In this study, we compared it with manual extraction, and the Nextractor system, an automated extraction method commonly used in Korea. From August to December 2018, 238 specimens, including sputum, bronchial washing, pericardial fluid, bronchial aspiration, pleural fluid, and closed pus samples, were collected and examined at Yeungnam University Hospital. After decontamination, smear microscopy, and culturing, DNA was extracted using the three methods. The DNA extraction efficiency (total amount of DNA [ng]/input specimen volume [μL]) and purity (A260/280 ratio), which indicates the presence of contaminants, were compared. Real-time PCR tests were conducted using the DNA extracted by each method. The cycle threshold, which is inversely related to the initial amount of mycobacterial DNA, and the percentage agreement between the PCR results of the three methods were evaluated. Our study revealed that the DNA extraction efficiency of the Real-Prep system was higher than that of manual extraction. There was no significant difference in DNA purity between the methods, and the percentage agreement for Mycobacterium tuberculosis and non-tuberculous mycobacteria among all three methods was almost perfect. The performance of the Real-Prep system was similar to that of the Nextractor system and superior to that of manual extraction. The Real-Prep system, a new automated nucleic acid extraction device, has a clear benefit because of its relative speed and low hands-on time. Therefore, the Real-Prep system is a useful substitute for manual DNA extraction, which has the potential to reduce workloads in laboratories and as a sensitive non-tuberculous mycobacteria detection method throughout the world.
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Affiliation(s)
- Hyung Woo Kim
- Department of Laboratory Medicine, Yeungnam University College of Medicine, Hyunchoongro 170, Daegu, Republic of Korea
| | - Chae Hoon Lee
- Department of Laboratory Medicine, Yeungnam University College of Medicine, Hyunchoongro 170, Daegu, Republic of Korea
| | - Jong Ho Lee
- Department of Laboratory Medicine, Yeungnam University College of Medicine, Hyunchoongro 170, Daegu, Republic of Korea.
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Mitrushkina VI, Smerdin SV, Stavitskaya NV, Lapyreva IA, Lazebny SV. A clinical observation of a Mycobacterium avium skin lesion in a patient with pulmonary tuberculosis. VESTNIK DERMATOLOGII I VENEROLOGII 2020. [DOI: 10.25208/0042-4609-2019-95-6-61-67] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Affiliation(s)
- V. I. Mitrushkina
- Moscow Regional Clinical Tuberculosis Dispensary, Ministry of Health of the Moscow region
| | - S. V. Smerdin
- Moscow Regional Clinical Tuberculosis Dispensary, Ministry of Health of the Moscow region
| | - N. V. Stavitskaya
- Moscow Regional Clinical Tuberculosis Dispensary, Ministry of Health of the Moscow region
| | - I. A. Lapyreva
- Moscow Regional Clinical Tuberculosis Dispensary, Ministry of Health of the Moscow region
| | - S. V. Lazebny
- Moscow Regional Clinical Tuberculosis Dispensary, Ministry of Health of the Moscow region
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