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Li W, Wang J, Li C, Zong Z, Zhao J, Gao H, Liu D. Achieving Ultrasensitive Chromogenic Probes for Rapid, Direct Detection of Carbapenemase-Producing Bacteria in Sputum. JACS AU 2023; 3:227-238. [PMID: 36711106 PMCID: PMC9875220 DOI: 10.1021/jacsau.2c00607] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/12/2022] [Accepted: 12/16/2022] [Indexed: 06/18/2023]
Abstract
Carbapenemase-producing bacteria (CPB) stand as the most dangerous "superbugs" in the clinic. Rapid point-of-care (POC) detection of CPB in clinical samples is key to timely and effective infection management. We herein report the first ultrasensitive chromogenic probe that allows direct POC detection of CPB in clinical sputum samples at a sample-to-result time of less than 15 min. This chromogenic probe is modularly designed by conjugating the carbapenem core with a benzene derivative bearing an electronegativity-tunable substituent. Unexpectedly high sensitivity was achieved simply by choosing strong electron-withdrawing substituents, such as -N+(CH3)3, without resorting to complex molecular design. Through integrating the probes with a portable paper chip, 24 out of 80 clinical sputum samples from sepsis patients with lung infections were quickly diagnosed as CPB-positive, exhibiting 100% clinical sensitivity and specificity. This low-cost paper chip assay can be readily performed on-site, breaking through the dilemma of rapid CPB detection, especially in resource-limited settings.
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Affiliation(s)
- Wenshuai Li
- State
Key Laboratory of Medicinal Chemical Biology, Research Center for
Analytical Sciences, and Tianjin Key Laboratory of Molecular Recognition
and Biosensing, Frontiers Science Center for New Organic Matter, College
of Chemistry, Nankai University, Tianjin300071, China
| | - Jingjing Wang
- Department
of Intensive Care Unit, Key Laboratory for Critical Care Medicine
of the Ministry of Health, Emergency Medicine Research Institute,
Tianjin First Center Hospital, School of Medicine, Nankai University, Tianjin300071, China
| | - Chen Li
- College
of Arts and Sciences, Shanxi Agricultural
University, Taigu030801, China
| | - Zhiyou Zong
- State
Key Laboratory of Medicinal Chemical Biology, Research Center for
Analytical Sciences, and Tianjin Key Laboratory of Molecular Recognition
and Biosensing, Frontiers Science Center for New Organic Matter, College
of Chemistry, Nankai University, Tianjin300071, China
| | - Jinzhong Zhao
- College
of Arts and Sciences, Shanxi Agricultural
University, Taigu030801, China
| | - Hongmei Gao
- Department
of Intensive Care Unit, Key Laboratory for Critical Care Medicine
of the Ministry of Health, Emergency Medicine Research Institute,
Tianjin First Center Hospital, School of Medicine, Nankai University, Tianjin300071, China
| | - Dingbin Liu
- State
Key Laboratory of Medicinal Chemical Biology, Research Center for
Analytical Sciences, and Tianjin Key Laboratory of Molecular Recognition
and Biosensing, Frontiers Science Center for New Organic Matter, College
of Chemistry, Nankai University, Tianjin300071, China
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2
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Presnova GV, Zhdanov GA, Filatova LY, Ulyashova MM, Presnov DE, Rubtsova MY. Improvement of Seed-Mediated Growth of Gold Nanoparticle Labels for DNA Membrane-Based Assays. BIOSENSORS 2022; 13:2. [PMID: 36671837 PMCID: PMC9855534 DOI: 10.3390/bios13010002] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 12/03/2022] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
Gold nanoparticles (AuNPs) are popular labels for colorimetric detection of various analytes, involving proteins, nucleic acids, viruses, and whole cells because of their outstanding optical properties, inertness, and modification variability. In this work, we present an improved approach for enhancement of color intensity for DNA membrane microarrays based on seed-mediated growth of AuNP labels. Biotin-labeled DNA is hybridized with capture oligonucleotide probes immobilized on the microarrays. Then biotin is revealed by a streptavidin-AuNP conjugate followed by the detection of AuNPs. Optimization of seed-mediated enlargement of AuNPs by the reduction of tetrachloroauric acid with hydroxylamine made it possible to change the coloring of specific spots on the microarrays from pink to a more contrasting black with minor background staining. Mean size of the resulting AuNPs was four times larger than before the enhancement. Adjusting the pH of HAuCl4 solution to 3.5 and use of a large excess of hydroxylamine increased the signal/background ratio by several times. The method's applicability was demonstrated for quantification of a short oligonucleotide of 19 bases and full-length TEM-type β-lactamase genes of 860 bp responsible for the development of bacterial resistance against β-lactam antibiotics. Improved protocol for AuNP enlargement may be further transferred to any other membrane-based assays of nucleic acids with both instrumental and visual colorimetric detection.
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Affiliation(s)
- Galina V. Presnova
- Department of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Gleb A. Zhdanov
- Department of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Luibov Yu. Filatova
- Department of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Mariya M. Ulyashova
- Department of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Denis E. Presnov
- D.V. Skobeltsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
- MSU Quantum Technology Centre, 119991 Moscow, Russia
- Cryoelectronics Lab, Faculty of Physics, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Maya Yu. Rubtsova
- Department of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
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3
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Filippova AA, Presnova GV, Grigorenko VG, Ulyashova MM, Rubtsova MY. A Method for Processing Digital Images of Colorimetric Biochips for Quantitative Determination of Bacterial Antibiotic Resistance Genes. APPL BIOCHEM MICRO+ 2022. [DOI: 10.1134/s0003683822090046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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4
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Rubtsova MY, Filippova AA, Fursova NK, Grigorenko VG, Presnova GV, Ulyashova MM, Egorov AM. Quantitative Determination of Beta-Lactamase mRNA in the RNA Transcripts of Antibiotic-Resistant Bacteria Using Colorimetric Biochips. JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1134/s1061934822050124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Multiplex Digital Quantification of β-Lactamase Genes in Antibiotic-Resistant Bacteria by Counting Gold Nanoparticle Labels on Silicon Microchips. BIOSENSORS 2022; 12:bios12040226. [PMID: 35448287 PMCID: PMC9024738 DOI: 10.3390/bios12040226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 04/06/2022] [Accepted: 04/07/2022] [Indexed: 11/21/2022]
Abstract
Digital quantification based on counting of individual molecules is a promising approach for different biomedical applications due to its enhanced sensitivity. Here, we present a method for the digital detection of nucleic acids (DNA and RNA) on silicon microchips based on the counting of gold nanoparticles (GNPs) in DNA duplexes by scanning electron microscopy (SEM). Biotin-labeled DNA is hybridized with capture oligonucleotide probes immobilized on the microchips. Then biotin is revealed by a streptavidin–GNP conjugate followed by the detection of GNPs. Sharp images of each nanoparticle allow the visualization of hybridization results on a single-molecule level. The technique was shown to provide highly sensitive quantification of both short oligonucleotide and long double-strand DNA sequences up to 800 bp. The lowest limit of detection of 0.04 pM was determined for short 19-mer oligonucleotide. The method’s applicability was demonstrated for the multiplex quantification of several β-lactamase genes responsible for the development of bacterial resistance against β-lactam antibiotics. Determination of nucleic acids is effective for both specific DNA in lysates and mRNA in transcripts. The method is also characterized by high selectivity for single-nucleotide polymorphism discrimination. The proposed principle of digital quantification is a perspective for studying the mechanisms of bacterial antibiotic resistance and bacterial response to drugs.
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6
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Rubtsova MY, Ulyashova MM, Pobolelova YI, Presnova GV, Egorov AM. Biochip for the Simultaneous Identification of Beta-Lactamase and Carbapenemase Genes Conferring Bacterial Resistance to Beta-Lactam Antibiotics. APPL BIOCHEM MICRO+ 2020. [DOI: 10.1134/s000368382002012x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Abstract
Microarray technologies have been a major research tool in the last decades. In addition they have been introduced into several fields of diagnostics including diagnostics of infectious diseases. Microarrays are highly parallelized assay systems that initially were developed for multiparametric nucleic acid detection. From there on they rapidly developed towards a tool for the detection of all kind of biological compounds (DNA, RNA, proteins, cells, nucleic acids, carbohydrates, etc.) or their modifications (methylation, phosphorylation, etc.). The combination of closed-tube systems and lab on chip devices with microarrays further enabled a higher automation degree with a reduced contamination risk. Microarray-based diagnostic applications currently complement and may in the future replace classical methods in clinical microbiology like blood cultures, resistance determination, microscopic and metabolic analyses as well as biochemical or immunohistochemical assays. In addition, novel diagnostic markers appear, like noncoding RNAs and miRNAs providing additional room for novel nucleic acid based biomarkers. Here I focus an microarray technologies in diagnostics and as research tools, based on nucleic acid-based arrays.
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Han ST, Fei Y, Huang JY, Xu M, Chen LC, Liao DJ, Tan YJ. Establishment of a Simple and Quick Method for Detecting Extended-Spectrum β-Lactamase (ESBL) Genes in Bacteria. J Biomol Tech 2016; 27:132-137. [PMID: 27672351 DOI: 10.7171/jbt.16-2704-001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Extended-spectrum β-lactamase (ESBL) genes that render bacteria resistant to antibiotics are commonly detected using phenotype testing, which is time consuming and not sufficiently accurate. To establish a better method, we used phenotype testing to identify ESBL-positive bacterial strains and conducted PCR to screen for TEM (named after the patient Temoneira who provided the first sample), sulfhydryl reagent variable (SHV), cefotaxime (CTX)-M-1, and CTX-M-9, the 4 most common ESBL types and subtypes. We then performed multiplex PCR with 1 primer containing a biotin and hybridized the PCR products with gene-specific probes that were coupled with microbeads and coated with a specific fluorescence. The hybrids were linked to streptavidin-R-phycoerythrins (SA-PEs) and run through a flow cytometer, which sorted the fluorescently dyed microbeads and quantified the PEs. The results from single PCR, multiplex PCR, and cytometry were consistent with each other. We used this method to test 169 clinical specimens that had been determined for phenotypes and found 154 positive for genotypes, including 30 of the 45 samples that were negative for phenotypes. The CTX-M genotype tests alone, counting both positive and negative cases, showed 99.41% (168/169) consistency with the ESBL phenotype test. Thus, we have established a multiplex-PCR system as a simple and quick method that is high throughput and accurate for detecting 4 common ESBL types and subtypes.
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Affiliation(s)
- Song-Tao Han
- Clinical Laboratory, Baiyun Hospital affiliated to Guizhou Medical University Hospital, Guiyang 550058, P.R. China;; Central Laboratory, Guizhou Medical University Hospital, Guiyang 550004, P.R. China
| | - Ying Fei
- Department of Microbiology and Immunology, Guizhou Medical University Hospital, Guiyang 550004, P.R. China
| | - Jin-You Huang
- Clinical Laboratory, Baiyun Hospital affiliated to Guizhou Medical University Hospital, Guiyang 550058, P.R. China
| | - Mei Xu
- Clinical Laboratory, Baiyun Hospital affiliated to Guizhou Medical University Hospital, Guiyang 550058, P.R. China
| | - Li-Chan Chen
- The Hormel Institute, University of Minnesota, Austin, Minnesota 55912, USA; and
| | - D Joshua Liao
- Department of Pathology, Guizhou Medical University Hospital, Guiyang 550004, P.R. China
| | - Yu-Jie Tan
- Clinical Laboratory, Baiyun Hospital affiliated to Guizhou Medical University Hospital, Guiyang 550058, P.R. China;; Central Laboratory, Guizhou Medical University Hospital, Guiyang 550004, P.R. China
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9
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Orlović J, Miljković-Selimović B, Dinić M, Ristić L. Resistance in Staphylococcus Aureus: The Never-Ending Story. ACTA FACULTATIS MEDICAE NAISSENSIS 2016. [DOI: 10.1515/afmnai-2016-0017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Summary
Combating Staphylococcus aureus (S. aureus) infections using antibacterial drugs is actually an ongoing effort to overcome resistance mechanism of this microorganism. In this paper, we discussed (1) the mechanisms of resistance to some of the most commonly used antimicrobial agents in the treatment of S. aureus: methicillin, vancomicyn and quinolones. In addition, (2) efflux pump mechanisms involved in maintaining homeostasis in the presence of compounds that inhibit S. aureus growth and reproduction, as well as mechanisms of resistance to a number of antibiotics, have been reviewed.
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10
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Chen Y, Xianyu Y, Wu J, Zheng W, Rao J, Jiang X. Point-of-Care Detection of β-Lactamase in Milk with a Universal Fluorogenic Probe. Anal Chem 2016; 88:5605-9. [DOI: 10.1021/acs.analchem.6b01122] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Yiping Chen
- Beijing Engineering Research Center for BioNanotechnology & CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, 11 BeiYiTiao, ZhongGuanCun, Beijing 100190, China
| | - Yunlei Xianyu
- Beijing Engineering Research Center for BioNanotechnology & CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, 11 BeiYiTiao, ZhongGuanCun, Beijing 100190, China
| | - Jing Wu
- Beijing Engineering Research Center for BioNanotechnology & CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, 11 BeiYiTiao, ZhongGuanCun, Beijing 100190, China
| | - Wenfu Zheng
- Beijing Engineering Research Center for BioNanotechnology & CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, 11 BeiYiTiao, ZhongGuanCun, Beijing 100190, China
| | - Jianghong Rao
- Molecular
Imaging Program at Stanford, Departments of Radiology and Chemistry, Stanford University, 1201 Welch Road, Stanford, California 94305-5484,United States
| | - Xingyu Jiang
- Beijing Engineering Research Center for BioNanotechnology & CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, 11 BeiYiTiao, ZhongGuanCun, Beijing 100190, China
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11
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Miljković-Selimović B, Dinić M, Orlović J, Babić T. Staphylococcus aureus: Immunopathogenesis and Human Immunity. ACTA FACULTATIS MEDICAE NAISSENSIS 2015. [DOI: 10.1515/afmnai-2015-0025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
SummaryConsidering a large number of pathogen factors that enable high virulence of a microorganism such as Staphylococcus aureus (S. aureus), it is essential to see them through the continuous adaptation to the newly acquired mechanisms of the host immune response and efforts to overcome these, allowing the bacteria a perfect ecological niche for growth, reproduction, and location of new hosts. Past efforts to create a vaccine that would provide effective protection against infections caused by S. aureus remained without success. The reasons for this stem from the outstanding adaptability skills of this microorganism to almost all environmental conditions, the existence of a numerous virulence factors whose mechanisms of action are not well known, as well as insufficient knowledge of the immune response to S. aureus infections. This review article deals with this issue from another perspective and emphasizes actual knowledge on virulence factors and immune response to S. aureus.
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12
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Grigorenko VG, Andreeva IP, Rubtsova MY, Egorov AM. Recombinant horseradish peroxidase: Production and analytical applications. BIOCHEMISTRY (MOSCOW) 2015; 80:408-16. [DOI: 10.1134/s0006297915040033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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13
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Rochelet M, Solanas S, Betelli L, Neuwirth C, Vienney F, Hartmann A. Amperometric detection of extended-spectrum β-lactamase activity: application to the characterization of resistant E. coli strains. Analyst 2015; 140:3551-6. [PMID: 25849107 DOI: 10.1039/c4an01786b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The amperometric detection of extended-spectrum β-lactamase (ESBL) with carbon screen-printed sensors was investigated in the presence of the Nitrocefin, a commercially-available β-lactamase chromogenic cephalosporin substrate. Using an ESBL isolated from a clinical sample, it was shown for the first time that the intensity of a specific anodic pic current (EP = ∼+0.3 V vs. Ag/AgCl) resulting from the catalytic hydrolysis of the β-lactam ring was proportional to the amount of ESBL. The proof-of-principle of a novel susceptibility assay for the rapid and accurate identification of ESBL- producing bacteria was then demonstrated. The detection scheme relied on (i) the culture of the sample in a medium containing the cefotaxime supplemented or not with the clavulanic acid inhibitor to allow the specific determination of ESBL producers (ii) followed by the incubation of the bacteria with the Nitrocefin and (iii) the measurement of the enzyme product by cyclic voltammetry. The amperometric assay was further applied to the characterization of E. coli strains and to the quantification of the ESBL producers. A detection limit of 5 × 10(4) cfu mL(-1) ESBL-producing E. coli was achieved after a 10 min incubation time. In contrast to the approved routine assays, the electrochemical approach, which did not require isolated colonies to be performed, provided quantified results regarding ESBL activity within a few hours. Finally, owing to its cost-effectiveness, portability and simplicity, this test holds great promise for clinical and environmental applications.
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Affiliation(s)
- Murielle Rochelet
- Université de Bourgogne, UMR1347 Agroécologie, 17 rue Sully, 21000 Dijon, France.
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14
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Zhou S, Wang D, Zhao Y, Wu Y. A rapid HPLC method for indirect quantification of β-lactamase activity in milk. J Dairy Sci 2015; 98:2197-204. [DOI: 10.3168/jds.2014-8845] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Accepted: 11/22/2014] [Indexed: 11/19/2022]
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15
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Abstract
Molecular diagnostics comprises a main analytical division in clinical laboratory diagnostics. The analysis of RNA or DNA helps to diagnose infectious diseases and identify genetic determined disorders or even cancer. Starting from mono-parametric tests within the last years, technologies have evolved that allow for the detection of many parameters in parallel, e.g., by using multiplex nucleic acid amplification techniques, microarrays, or next-generation sequencing technologies. The introduction of closed-tube systems as well as lab-on-a-chip devices further resulted in a higher automation degree with a reduced contamination risk. These applications complement or even stepwise replace classical methods in clinical microbiology like virus cultures, resistance determination, microscopic and metabolic analyses, as well as biochemical or immunohistochemical assays. In addition, novel diagnostic markers appear, like noncoding RNAs and miRNAs providing additional room for novel biomarkers. This article provides an overview of microarrays as diagnostics devices and research tools. Introduced in 1995 for transcription analysis, microarrays are used today to detect several different biomolecules like DNA, RNA, miRNA, and proteins among others. Mainly used in research, some microarrays also found their way to clinical diagnostics. Further, closed lab-on-a-chip devices that use DNA microarrays as detection tools are discussed, and additionally, an outlook toward applications of next-generation sequencing tools in diagnostics will be given.
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Affiliation(s)
- Volker A. Erdmann
- Free University of Berlin Institute of Chemistry/Biochemistry, Thielallee 63, Berlin Germany
| | - Stefan Jurga
- Nanobiomedical Center, Adam Mickiewicz University, Umultowska 85 Poznań, Poland
| | - Jan Barciszewski
- Institute of Bioorganic Chemistry of the Polish Academy of Sciences, Z. Noskowskiego 12/14 Poznań, Poland
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16
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Sakai K, Trabasso P, Moretti ML, Mikami Y, Kamei K, Gonoi T. Identification of fungal pathogens by visible microarray system in combination with isothermal gene amplification. Mycopathologia 2014; 178:11-26. [PMID: 24952715 PMCID: PMC4098066 DOI: 10.1007/s11046-014-9756-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Accepted: 04/21/2014] [Indexed: 11/24/2022]
Abstract
The increasing incidence of infectious diseases caused by fungi in immunocompromised patients has encouraged researchers to develop rapid and accurate diagnosis methods. Identification of the causative fungal species is critical in deciding the appropriate treatment, but it is not easy to get satisfactory results due to the difficulty of fungal cultivation and morphological identification from clinical samples. In this study, we established a microarray system that can identify 42 species from 24 genera of clinically important fungal pathogens by using a chemical color reaction in the detection process. The array uses the internal transcribed spacer region of the rRNA gene for identification of fungal DNA at the species level. The specificity of this array was tested against a total of 355 target and nontarget fungal species. The fungal detection was succeeded directly from 103 CFU/ml for whole blood samples, and 50 fg DNA per 1 ml of serum samples indicating that the array system we established is sensitive to identify infecting fungi from clinical sample. Furthermore, we conducted isothermal amplification in place of PCR amplification and labeling. The successful identification with PCR-amplified as well as isothermally amplified target genes demonstrated that our microarray system is an efficient and robust method for identifying a variety of fungal species in a sample.
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Affiliation(s)
- Kanae Sakai
- Division of BioResources, Medical Mycology Research Center, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba, Japan
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17
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Lu X, Nie S, Xia C, Huang L, He Y, Wu R, Zhang L. A rapid two-step algorithm detects and identifies clinical macrolide and beta-lactam antibiotic resistance in clinical bacterial isolates. J Microbiol Methods 2014; 102:26-31. [PMID: 24769404 DOI: 10.1016/j.mimet.2014.04.006] [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: 02/03/2014] [Revised: 04/12/2014] [Accepted: 04/13/2014] [Indexed: 10/25/2022]
Abstract
PURPOSE Aiming to identify macrolide and beta-lactam resistance in clinical bacterial isolates rapidly and accurately, a two-step algorithm was developed based on detection of eight antibiotic resistance genes. METHODS Targeting at genes linked to bacterial macrolide (msrA, ermA, ermB, and ermC) and beta-lactam (blaTEM, blaSHV, blaCTX-M-1, blaCTX-M-9) antibiotic resistances, this method includes a multiplex real-time PCR, a melting temperature profile analysis as well as a liquid bead microarray assay. Liquid bead microarray assay is applied only when indistinguishable Tm profile is observed. RESULTS The clinical validity of this method was assessed on clinical bacterial isolates. Among the total 580 isolates that were determined by our diagnostic method, 75% of them were identified by the multiplex real-time PCR with melting temperature analysis alone, while the remaining 25% required both multiplex real-time PCR with melting temperature analysis and liquid bead microarray assay for identification. Compared with the traditional phenotypic antibiotic susceptibility test, an overall agreement of 81.2% (kappa=0.614, 95% CI=0.550-0.679) was observed, with a sensitivity and specificity of 87.7% and 73% respectively. Besides, the average test turnaround time is 3.9h, which is much shorter in comparison with more than 24h for the traditional phenotypic tests. CONCLUSIONS Having the advantages of the shorter operating time and comparable high sensitivity and specificity with the traditional phenotypic test, our two-step algorithm provides an efficient tool for rapid determination of macrolide and beta-lactam antibiotic resistances in clinical bacterial isolates.
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Affiliation(s)
- Xuedong Lu
- Department of Laboratory Medicine, Futian Hospital, Guangdong Medical College, Shenzhen 518033, China.
| | - Shuping Nie
- Department of Laboratory Medicine, Futian Hospital, Guangdong Medical College, Shenzhen 518033, China
| | - Chengjing Xia
- Department of Laboratory Medicine, Futian Hospital, Guangdong Medical College, Shenzhen 518033, China
| | - Lie Huang
- Department of Laboratory Medicine, Futian Hospital, Guangdong Medical College, Shenzhen 518033, China
| | - Ying He
- Department of Laboratory Medicine, Futian Hospital, Guangdong Medical College, Shenzhen 518033, China
| | - Runxiang Wu
- Department of Laboratory Medicine, Futian Hospital, Guangdong Medical College, Shenzhen 518033, China
| | - Li Zhang
- Department of Laboratory Medicine, Futian Hospital, Guangdong Medical College, Shenzhen 518033, China; Department of Cell and Molecular Biology, Uppsala University, Biomedical Center, Box 596, SE-751 24 Uppsala, Sweden.
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18
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Lupo A, Papp-Wallace KM, Sendi P, Bonomo RA, Endimiani A. Non-phenotypic tests to detect and characterize antibiotic resistance mechanisms in Enterobacteriaceae. Diagn Microbiol Infect Dis 2013; 77:179-94. [PMID: 24091103 DOI: 10.1016/j.diagmicrobio.2013.06.001] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2013] [Accepted: 06/12/2013] [Indexed: 02/07/2023]
Abstract
In the past 2 decades, we have observed a rapid increase of infections due to multidrug-resistant Enterobacteriaceae. Regrettably, these isolates possess genes encoding for extended-spectrum β-lactamases (e.g., blaCTX-M, blaTEM, blaSHV) or plasmid-mediated AmpCs (e.g., blaCMY) that confer resistance to last-generation cephalosporins. Furthermore, other resistance traits against quinolones (e.g., mutations in gyrA and parC, qnr elements) and aminoglycosides (e.g., aminoglycosides modifying enzymes and 16S rRNA methylases) are also frequently co-associated. Even more concerning is the rapid increase of Enterobacteriaceae carrying genes conferring resistance to carbapenems (e.g., blaKPC, blaNDM). Therefore, the spread of these pathogens puts in peril our antibiotic options. Unfortunately, standard microbiological procedures require several days to isolate the responsible pathogen and to provide correct antimicrobial susceptibility test results. This delay impacts the rapid implementation of adequate antimicrobial treatment and infection control countermeasures. Thus, there is emerging interest in the early and more sensitive detection of resistance mechanisms. Modern non-phenotypic tests are promising in this respect, and hence, can influence both clinical outcome and healthcare costs. In this review, we present a summary of the most advanced methods (e.g., next-generation DNA sequencing, multiplex PCRs, real-time PCRs, microarrays, MALDI-TOF MS, and PCR/ESI MS) presently available for the rapid detection of antibiotic resistance genes in Enterobacteriaceae. Taking into account speed, manageability, accuracy, versatility, and costs, the possible settings of application (research, clinic, and epidemiology) of these methods and their superiority against standard phenotypic methods are discussed.
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Affiliation(s)
- Agnese Lupo
- Institute for Infectious Diseases, University of Bern, Bern, Switzerland
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19
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Zhou S, Zhao Y, Mecklenburg M, Yang D, Xie B. A novel thermometric biosensor for fast surveillance of β-lactamase activity in milk. Biosens Bioelectron 2013; 49:99-104. [PMID: 23722048 DOI: 10.1016/j.bios.2013.05.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 04/12/2013] [Accepted: 05/02/2013] [Indexed: 10/26/2022]
Abstract
Regulatory restrictions on antibiotic residues in dairy products have resulted in the illegal addition of β-lactamase to lower antibiotic levels in milk in China. Here we demonstrate a fast, sensitive and convenient method based on enzyme thermistor (ET) for the surveillance of β-lactamase in milk. A fixed amount of penicillin G, which is a specific substrate of β-lactamase, was incubated with the milk sample, and an aliquot of the mixture was directly injected into the ET system to give a temperature change corresponding to the remained penicillin G. The amount of β-lactamase present in sample was deduced by the penicillin G consumed during incubation. This method was successfully applied to quantify β-lactamase in milk with the linear range of 1.1-20 UmL(-1) and the detection limit of 1.1 UmL(-1). The recoveries ranged from 93% to 105%, with relative standard deviations (RSDs) below 8%. The stability of the column equipped in ET was also studied, and only 5% decrease of activity was observed after 60 days of use. Compared with the conventional culture-based assay, the advantages of high throughput, timesaving and accurate quantification have made this method an ideal alternative for routine use.
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Affiliation(s)
- Shuang Zhou
- China National Center for Food Safety Risk Assessment, Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing 100021, PR China.
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Rochelet M, Vienney F, Solanas S, Membrilla A, Hartmann A. An electrochemical DNA biosensor for the detection of CTX-M extended-spectrum β-lactamase-producing Escherichia coli in soil samples. J Microbiol Methods 2013; 92:153-6. [DOI: 10.1016/j.mimet.2012.11.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 11/28/2012] [Accepted: 11/28/2012] [Indexed: 10/27/2022]
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