1
|
Liu G, Li W, Li S, Xu J, Wang X, Xu H, Liu D, Gao H. Culture-free detection of β-lactamase-Producing bacteria in urinary tract infections using a paper sensor. Biosens Bioelectron 2024; 257:116300. [PMID: 38657378 DOI: 10.1016/j.bios.2024.116300] [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: 02/04/2024] [Revised: 04/05/2024] [Accepted: 04/15/2024] [Indexed: 04/26/2024]
Abstract
Developing simple, inexpensive, fast, sensitive, and specific probes for antibiotic-resistant bacteria is crucial for the management of urinary tract infections (UTIs). We here propose a paper-based sensor for the rapid detection of β-lactamase-producing bacteria in the urine samples of UTI patients. By conjugating a strongly electronegative group -N+(CH3)3 with the core structures of cephalosporin and carbapenem antibiotics, two visual probes were achieved to respectively target the extended-spectrum/AmpC β-lactamases (ESBL/AmpC) and carbapenemase, the two most prevalent factors causing antibiotic resistance. By integrating these probes into a portable paper sensor, we confirmed 10 and 8 cases out of 30 clinical urine samples as ESBL/AmpC- and carbapenemase-positive, respectively, demonstrating 100% clinical sensitivity and specificity. This paper sensor can be easily conducted on-site, without resorting to bacterial culture, providing a solution to the challenge of rapid detection of β-lactamase-producing bacteria, particularly in resource-limited settings.
Collapse
Affiliation(s)
- Guangming Liu
- Department of Urology, Tianjin First Center Hospital, Nankai University, Tianjin 300071, China
| | - Wenshuai Li
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Recognition and Biosensing, Frontiers Science Centers for Cell Responses and New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Siya Li
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Recognition and Biosensing, Frontiers Science Centers for Cell Responses and New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jia Xu
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Recognition and Biosensing, Frontiers Science Centers for Cell Responses and New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xinsheng Wang
- Department of Urology, Tianjin First Center Hospital, Nankai University, Tianjin 300071, China
| | - Hua Xu
- Department of Intensive Care Unit, Key Laboratory for Critical Care Medicine of the Ministry of Health, Emergency Medicine Research Institute, Tianjin First Center Hospital, Nankai University, Tianjin 300071, China
| | - Dingbin Liu
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Recognition and Biosensing, Frontiers Science Centers for Cell Responses and New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, 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, Nankai University, Tianjin 300071, China.
| |
Collapse
|
2
|
Li W, Li J, Xu H, Gao H, Liu D. Rapid and visual identification of β-lactamase subtypes for precision antibiotic therapy. Nat Commun 2024; 15:719. [PMID: 38267434 PMCID: PMC10808423 DOI: 10.1038/s41467-024-44984-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 01/09/2024] [Indexed: 01/26/2024] Open
Abstract
The abuse of antibiotics urgently requires rapid identification of drug-resistant bacteria at the point of care (POC). Here we report a visual paper sensor that allows rapid (0.25-3 h) discrimination of the subtypes of β-lactamase (the major cause of bacterial resistance) for precision antibiotic therapy. The sensor exhibits high performance in identifying antibiotic-resistant bacteria with 100 real samples from patients with diverse bacterial infections, demonstrating 100% clinical sensitivity and specificity. Further, this sensor can enhance the accuracy of antibiotic use from 48% empirically to 83%, and further from 50.6% to 97.6% after eliminating fungal infection cases. Our work provides a POC testing platform for guiding effective management of bacterial infections in both hospital and community settings.
Collapse
Affiliation(s)
- Wenshuai Li
- State Key Laboratory of Medicinal Chemical Biology, Frontiers Science Centers for Cell Responses and New Organic Matter, College of Chemistry, Nankai University, Tianjin, 300071, China
- Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University, Tianjin, 300071, China
| | - Jingqi Li
- State Key Laboratory of Medicinal Chemical Biology, Frontiers Science Centers for Cell Responses and New Organic Matter, College of Chemistry, Nankai University, Tianjin, 300071, China
- Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University, Tianjin, 300071, China
| | - Hua Xu
- 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, Tianjin, 300071, 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, Tianjin, 300071, China
| | - Dingbin Liu
- State Key Laboratory of Medicinal Chemical Biology, Frontiers Science Centers for Cell Responses and New Organic Matter, College of Chemistry, Nankai University, Tianjin, 300071, China.
- Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University, Tianjin, 300071, China.
| |
Collapse
|
3
|
Zhou Q, Catalán P, Bell H, Baumann P, Cooke R, Evans R, Yang J, Zhang Z, Zappalà D, Zhang Y, Blackburn GM, He Y, Jin Y. An Ion-Pair Induced Intermediate Complex Captured in Class D Carbapenemase Reveals Chloride Ion as a Janus Effector Modulating Activity. ACS CENTRAL SCIENCE 2023; 9:2339-2349. [PMID: 38161376 PMCID: PMC10755735 DOI: 10.1021/acscentsci.3c00609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 11/17/2023] [Accepted: 11/17/2023] [Indexed: 01/03/2024]
Abstract
Antibiotic-resistant Enterobacterales that produce oxacillinase (OXA)-48-like Class D β-lactamases are often linked to increased clinical mortality. Though the catalytic mechanism of OXA-48 is known, the molecular origin of its biphasic kinetics has been elusive. We here identify selective chloride binding rather than decarbamylation of the carbamylated lysine as the source of biphasic kinetics, utilizing isothermal titration calorimetry (ITC) to monitor the complete reaction course with the OXA-48 variant having a chemically stable N-acetyl lysine. Further structural investigation enables us to capture an unprecedented inactive acyl intermediate wedged in place by a halide ion paired with a conserved active site arginine. Supported by mutagenesis and mathematical simulation, we identify chloride as a "Janus effector" that operates by allosteric activation of the burst phase and by inhibition of the steady state in kinetic assays of β-lactams. We show that chloride-induced biphasic kinetics directly affects antibiotic efficacy and facilitates the differentiation of clinical isolates encoding Class D from Class A and B carbapenemases. As chloride is present in laboratory and clinical procedures, our discovery greatly expands the roles of chloride in modulating enzyme catalysis and highlights its potential impact on the pharmacokinetics and efficacy of antibiotics during in vivo treatment.
Collapse
Affiliation(s)
- Qi Zhou
- Key
Laboratory of Synthetic and Natural Functional Molecule, College of
Chemistry and Materials Science, Northwest
University, Xi’an 710127, P. R. China
| | - Pablo Catalán
- Grupo
Interdisciplinar de Sistemas Complejos, Departamento de Matemáticas, Universidad Carlos III de Madrid, 28911 Leganés, Spain
| | - Helen Bell
- School
of Chemistry, Cardiff University, Cardiff, CF10 3AT, United Kingdom
| | - Patrick Baumann
- School
of Chemistry, Cardiff University, Cardiff, CF10 3AT, United Kingdom
- Manchester
Institute of Biotechnology, University of
Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
| | - Rebekah Cooke
- School
of Chemistry, Cardiff University, Cardiff, CF10 3AT, United Kingdom
| | - Rhodri Evans
- School
of Chemistry, Cardiff University, Cardiff, CF10 3AT, United Kingdom
- Manchester
Institute of Biotechnology, University of
Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
| | - Jianhua Yang
- Key
Laboratory of Synthetic and Natural Functional Molecule, College of
Chemistry and Materials Science, Northwest
University, Xi’an 710127, P. R. China
| | - Zhen Zhang
- Key
Laboratory of Synthetic and Natural Functional Molecule, College of
Chemistry and Materials Science, Northwest
University, Xi’an 710127, P. R. China
- School
of Chemistry, Cardiff University, Cardiff, CF10 3AT, United Kingdom
| | - Davide Zappalà
- School
of Chemistry, Cardiff University, Cardiff, CF10 3AT, United Kingdom
| | - Ye Zhang
- Key
Laboratory of Synthetic and Natural Functional Molecule, College of
Chemistry and Materials Science, Northwest
University, Xi’an 710127, P. R. China
| | - George Michael Blackburn
- School
of Biosciences, University of Sheffield, Firth Court, Western Bank, Sheffield S10 2TN, United Kingdom
| | - Yuan He
- Key
Laboratory of Synthetic and Natural Functional Molecule, College of
Chemistry and Materials Science, Northwest
University, Xi’an 710127, P. R. China
| | - Yi Jin
- School
of Chemistry, Cardiff University, Cardiff, CF10 3AT, United Kingdom
- Manchester
Institute of Biotechnology, University of
Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
| |
Collapse
|
4
|
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.
Collapse
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
| |
Collapse
|
5
|
Wang Q, Zhu L, Yu Y, Guan H, Xu Z. Microbial Screening of Marine Natural Product Inhibitors for the 6′-Aminoglycoside Acetyltransferase 2″-Aminoglycoside Phosphotransferase [AAC(6′)-APH(2″)] Bifunctional Enzyme by Ultra-High Performance Liquid Chromatography–Mass Spectrometry (UHPLC-MS). ANAL LETT 2021. [DOI: 10.1080/00032719.2021.1903025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Qian Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycoengineering, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
- Laboratory for Marine Drugs and Bioproducts, Innovation Center for Marine Drugs Screening and Evaluation, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Li Zhu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycoengineering, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
- Laboratory for Marine Drugs and Bioproducts, Innovation Center for Marine Drugs Screening and Evaluation, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Yi Yu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycoengineering, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
- Laboratory for Marine Drugs and Bioproducts, Innovation Center for Marine Drugs Screening and Evaluation, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Huashi Guan
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycoengineering, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
- Laboratory for Marine Drugs and Bioproducts, Innovation Center for Marine Drugs Screening and Evaluation, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Zhe Xu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycoengineering, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
- Laboratory for Marine Drugs and Bioproducts, Innovation Center for Marine Drugs Screening and Evaluation, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| |
Collapse
|
6
|
Lei JE, Wang Q, Lin Y, Li F, Ma C, He Y, Xu JR. Rapid detection of extended-spectrum β-Lactamases producers in Enterobacteriaceae using a calorimetry approach. J Appl Microbiol 2020; 130:1523-1530. [PMID: 32890446 DOI: 10.1111/jam.14841] [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: 04/30/2020] [Revised: 08/04/2020] [Accepted: 08/26/2020] [Indexed: 11/29/2022]
Abstract
AIM To design and assess a novel protocol that employs isothermal titration calorimetry (ITC) for rapid detection of extended-spectrum β-lactamase (ESBL)-producers in clinical pathogens. METHODS AND RESULTS A total of 69 clinical Enterobacteriaceae isolates were examined in the new ESBL-ITC test by examining the heat profiles associated with enzyme hydrolysis of different substrates (imipenem, cefotaxime and clavulanic acid). The presence of β-lactamase genes in the bacteria tested was confirmed by PCR and DNA sequencing. Comparative analysis between ESBL-ITC and conventional minimum inhibitory concentrations (MIC)/combined disk method (CDM) showed high agreement between the two assays. However, the ESBL-ITC test had a remarkable advantage of providing testing result within 1 h, in comparison to the 32-48 h required by MIC/CDM. CONCLUSIONS The ESBL-ITC test developed in this work offers a new option for rapid and accurate detection of ESBL-producers. SIGNIFICANCE AND IMPACT OF THE STUDY Timely detection of ESBL-producers is vital to guide the decision-making process in clinical treatment as well as in hospital-infection control. The new ESBL-ITC test provides a rapid phenotypic assay that can be further adapted for clinical diagnosis of ESBL-producing pathogens.
Collapse
Affiliation(s)
- J-E Lei
- Department of Microbiology and Immunology, School of Basic Medical Science of Xi'anJiaotong University Health Science Center, Key Laboratory of Environmental and Genes Related to Disease, Ministry of Education, Xi'an, China.,Department of Clinical Laboratory, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Q Wang
- College of Chemistry and Materials Science, Key Laboratory of Synthetic and Natural Functional Molecule, Ministry of Education, Northwest University, Xi'an, Shaanxi, China
| | - Y Lin
- Scion (New Zealand Forest Research Institute), Rotorua, New Zealand
| | - F Li
- Department of Clinical Laboratory, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - C Ma
- Department of Clinical Laboratory, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Y He
- College of Chemistry and Materials Science, Key Laboratory of Synthetic and Natural Functional Molecule, Ministry of Education, Northwest University, Xi'an, Shaanxi, China
| | - J-R Xu
- Department of Microbiology and Immunology, School of Basic Medical Science of Xi'anJiaotong University Health Science Center, Key Laboratory of Environmental and Genes Related to Disease, Ministry of Education, Xi'an, China
| |
Collapse
|
7
|
Chen J, Li H, Xie H, Xu D. A novel method combining aptamer-Ag 10NPs based microfluidic biochip with bright field imaging for detection of KPC-2-expressing bacteria. Anal Chim Acta 2020; 1132:20-27. [PMID: 32980107 DOI: 10.1016/j.aca.2020.07.061] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 07/04/2020] [Accepted: 07/24/2020] [Indexed: 12/23/2022]
Abstract
The β-lactam drugs resistance poses a serious threat to human health throughout the world. Klebsiella pneumoniae carbapenemase 2 (KPC-2) is a carbapenemase that produced in bacteria can hydrolyze carbapenems, which typically considered as the antibiotics of last resort. Therefore, there is an urgent need to quickly and accurately detect whether bacteria express KPC-2. In this paper, a PDMS/glass microfluidic biochip integrated with aptamer-modified Ag10NPs nano-biosensors was developed for rapid, simple and specific pathogenic bacteria detection, more importantly, the biochip was combined with bright field imaging, then the captured bacteria could be observed and counted directly without using extra chemical labeling. KPC-2-expressing Escherichia coli (KPC-2 E.coli) was used as the target bacterium with a detected limit of 102 CFU and capture efficiency exceeded 90%. This method is remarkably specific towards KPC-2 E.coli over other non-resistant bacteria, and pathogen assay only takes ∼1 h to complete in a ready-to-use microfluidic biochip. Furthermore, the effective capture and fast counting of microfluidic biochip system demonstrates its potential for the rapid detection of antibiotic-resistant bacteria.
Collapse
Affiliation(s)
- Jing Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry Engineering, Nanjing University, No 163, Xianlin Avenue, Nanjing, 210023, PR China
| | - Hui Li
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry Engineering, Nanjing University, No 163, Xianlin Avenue, Nanjing, 210023, PR China
| | - Hexin Xie
- State Key Laboratory of Bioreactor Engineering Shanghai Key Laboratory of New Drug Design School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, PR China
| | - Danke Xu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry Engineering, Nanjing University, No 163, Xianlin Avenue, Nanjing, 210023, PR China.
| |
Collapse
|
8
|
On-chip Carba NP test for accurate and high throughput detection of carbapenemase-producing Enterobacteriaceae. Talanta 2020; 210:120656. [DOI: 10.1016/j.talanta.2019.120656] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 12/09/2019] [Accepted: 12/19/2019] [Indexed: 12/22/2022]
|
9
|
Schoepp NG, Liaw EJ, Winnett A, Savela ES, Garner OB, Ismagilov RF. Differential DNA accessibility to polymerase enables 30-minute phenotypic β-lactam antibiotic susceptibility testing of carbapenem-resistant Enterobacteriaceae. PLoS Biol 2020; 18:e3000652. [PMID: 32191697 PMCID: PMC7081982 DOI: 10.1371/journal.pbio.3000652] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 02/14/2020] [Indexed: 12/22/2022] Open
Abstract
The rise in carbapenem-resistant Enterobacteriaceae (CRE) infections has created a global health emergency, underlining the critical need to develop faster diagnostics to treat swiftly and correctly. Although rapid pathogen-identification (ID) tests are being developed, gold-standard antibiotic susceptibility testing (AST) remains unacceptably slow (1-2 d), and innovative approaches for rapid phenotypic ASTs for CREs are urgently needed. Motivated by this need, in this manuscript we tested the hypothesis that upon treatment with β-lactam antibiotics, susceptible Enterobacteriaceae isolates would become sufficiently permeabilized, making some of their DNA accessible to added polymerase and primers. Further, we hypothesized that this accessible DNA would be detectable directly by isothermal amplification methods that do not fully lyse bacterial cells. We build on these results to develop the polymerase-accessibility AST (pol-aAST), a new phenotypic approach for β-lactams, the major antibiotic class for gram-negative infections. We test isolates of the 3 causative pathogens of CRE infections using ceftriaxone (CRO), ertapenem (ETP), and meropenem (MEM) and demonstrate agreement with gold-standard AST. Importantly, pol-aAST correctly categorized resistant isolates that are undetectable by current genotypic methods (negative for β-lactamase genes or lacking predictive genotypes). We also test contrived and clinical urine samples. We show that the pol-aAST can be performed in 30 min sample-to-answer using contrived urine samples and has the potential to be performed directly on clinical urine specimens.
Collapse
Affiliation(s)
- Nathan G. Schoepp
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California, United States of America
| | - Eric J. Liaw
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California, United States of America
| | - Alexander Winnett
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California, United States of America
| | - Emily S. Savela
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California, United States of America
| | - Omai B. Garner
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, California, United States of America
| | - Rustem F. Ismagilov
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California, United States of America
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California, United States of America
| |
Collapse
|
10
|
Chen H, Ding F, Zhou Z, He X, Shen J. FRET-based sensor for visualizing pH variation with colorimetric/ratiometric strategy and application for bioimaging in living cells, bacteria and zebrafish. Analyst 2020; 145:4283-4294. [DOI: 10.1039/d0an00841a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Acid–base balance plays a key role in regulating biological processes, and the cells must stabilize the pH within a certain range, and pH instability will cause a series of diseases.
Collapse
Affiliation(s)
- Hong Chen
- Luoyang Key Laboratory of Organic Functional Molecules
- College of Food and Drug
- Luoyang Normal University
- Luoyang
- China
| | - Feng Ding
- Department of Microbiology & Immunology
- School of Basic Medical Sciences
- Wenzhou Medical University
- Wenzhou
- China
| | - Zhan Zhou
- College of Chemistry and Chemical Engineering
- Henan Key Laboratory of Function-Oriented Porous Materials
- Luoyang Normal University
- Luoyang
- China
| | - Xiaojun He
- School of Ophthalmology & Optometry
- School of Biomedical Engineering
- Wenzhou Medical University
- Wenzhou
- China
| | - Jianliang Shen
- School of Ophthalmology & Optometry
- School of Biomedical Engineering
- Wenzhou Medical University
- Wenzhou
- China
| |
Collapse
|