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Rapid Tuberculosis Diagnosis Using Reporter Enzyme Fluorescence. J Clin Microbiol 2019; 57:JCM.01462-19. [PMID: 31511338 PMCID: PMC6879286 DOI: 10.1128/jcm.01462-19] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 09/06/2019] [Indexed: 12/20/2022] Open
Abstract
Tuberculosis is the most frequent cause of death in humans from a single infectious agent. Due to low numbers of bacteria present in sputum during early infection, diagnosis does not usually occur until >3 to 4 months after symptoms develop. We created a new more sensitive diagnostic that can be carried out in 10 min with no processing or technical expertise. Tuberculosis is the most frequent cause of death in humans from a single infectious agent. Due to low numbers of bacteria present in sputum during early infection, diagnosis does not usually occur until >3 to 4 months after symptoms develop. We created a new more sensitive diagnostic that can be carried out in 10 min with no processing or technical expertise. This assay utilizes the Mycobacterium tuberculosis-specific biomarker BlaC in reporter enzyme fluorescence (REF) that has been optimized for clinical samples, designated REFtb, along with a more specific fluorogenic substrate, CDG-3. We report the first evaluation of clinical specimens with REFtb assays in comparison to the gold standards for tuberculosis diagnosis, culture and smear microscopy. REFtb assays allowed diagnosis of 160 patients from 16 different countries with a sensitivity of 89% for smear-positive, culture-positive samples and 88% for smear-negative, culture-positive samples with a specificity of 82%. The negative predictive value of REFtb for tuberculosis infection is 93%, and the positive predictive value is 79%. Overall, these data point toward the need for larger accuracy studies by third parties using a commercially available REFtb kit to determine whether incorporation of REFtb into the clinical toolbox for suspected tuberculosis patients would improve case identification. If results similar to our own can be obtained by all diagnostic laboratories, REFtb would allow proper treatment of more than 85% of patients that would be missed during their initial visit to a clinic using current diagnostic strategies, reducing the potential for further spread of disease.
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52
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Kim J, Kim Y, Abdelazem AZ, Kim HJ, Choo H, Kim HS, Kim JO, Park YJ, Min SJ. Development of carbapenem-based fluorogenic probes for the clinical screening of carbapenemase-producing bacteria. Bioorg Chem 2019; 94:103405. [PMID: 31806156 DOI: 10.1016/j.bioorg.2019.103405] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 09/18/2019] [Accepted: 10/26/2019] [Indexed: 11/16/2022]
Abstract
This report describes the synthesis of a library of fluorogenic carbapenemase substrates consisting of carbapenem derivatives, fluorescence dyes, and active cleavable linkers and their evaluation for specifically detecting carbapenemase-producing organisms (CPOs). We synthesized a series of compounds having three different types of linkers such as benzyl ether, carbamate, and amine using hydroxymethyl carbapenem 7a and hydroxyallyl carbapenem 7b as key intermediates. Probe 1b exhibited high stability and a prompt turn-on fluorescence signal upon hydrolysis by carbapenemases. In particular, the screening of clinical samples indicated that the probe 1b exhibited excellent selectivity to the CPOs over other β-lactamases or non-carbapenemase producing bacteria, which may be of clinical use for the rapid and accurate detection of CPOs for timely diagnosis and treatment.
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Affiliation(s)
- Juhyeon Kim
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea; Center for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Yihoon Kim
- Department of Applied Chemistry, Hanyang University, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Ahmed Z Abdelazem
- Biotechnology and Life Sciences Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Egypt
| | - Hak Joong Kim
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
| | - Hyunah Choo
- Center for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Hoon Seok Kim
- Department of Laboratory Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Jung Ok Kim
- Department of Laboratory Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Yeon-Joon Park
- Department of Laboratory Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Sun-Joon Min
- Department of Applied Chemistry, Hanyang University, Ansan, Gyeonggi-do 15588, Republic of Korea; Department of Chemical & Molecular Engineering, Hanyang University, Ansan, Gyeonggi-do 15588, Republic of Korea.
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53
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Cheng Y, Xie J, Lee KH, Gaur RL, Song A, Dai T, Ren H, Wu J, Sun Z, Banaei N, Akin D, Rao J. Rapid and specific labeling of single live Mycobacterium tuberculosis with a dual-targeting fluorogenic probe. Sci Transl Med 2019; 10:10/454/eaar4470. [PMID: 30111644 DOI: 10.1126/scitranslmed.aar4470] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 06/26/2018] [Indexed: 01/07/2023]
Abstract
Tuberculosis (TB) remains a public health crisis and a leading cause of infection-related death globally. Although in high demand, imaging technologies that enable rapid, specific, and nongenetic labeling of live Mycobacterium tuberculosis (Mtb) remain underdeveloped. We report a dual-targeting strategy to develop a small molecular probe (CDG-DNB3) that can fluorescently label single bacilli within 1 hour. CDG-DNB3 fluoresces upon activation of the β-lactamase BlaC, a hydrolase naturally expressed in Mtb, and the fluorescent product is retained through covalent modification of the Mtb essential enzyme decaprenylphosphoryl-β-d-ribose 2'-epimerase (DprE1). This dual-targeting probe not only discriminates live from dead Bacillus Calmette-Guérin (BCG) but also shows specificity for Mtb over other bacterial species including 43 nontuberculosis mycobacteria (NTM). In addition, CDG-DNB3 can image BCG phagocytosis in real time, as well as Mtb in patients' sputum. Together with a low-cost, self-driven microfluidic chip, we have achieved rapid labeling and automated quantification of live BCG. This labeling approach should find many potential applications for research toward TB pathogenesis, treatment efficacy assessment, and diagnosis.
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Affiliation(s)
- Yunfeng Cheng
- Departments of Radiology and Chemistry, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Jinghang Xie
- Departments of Radiology and Chemistry, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Kyung-Hyun Lee
- Departments of Radiology and Chemistry, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, CA 94305, USA.,Institute of Bioengineering and Nanotechnology, The Nanos, Singapore 138669, Singapore
| | - Rajiv L Gaur
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA.,Clinical Microbiology Laboratory, Stanford University Medical Center, Palo Alto, CA 94304, USA.,Division of Infectious Diseases and Geographic Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Aiguo Song
- Departments of Radiology and Chemistry, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Tingting Dai
- Departments of Radiology and Chemistry, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Hongjun Ren
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China
| | - Jiannan Wu
- National Tuberculosis Clinical Laboratory, Beijing Chest Hospital, Capital Medical University, Beijing 101149, P. R. China.,Beijing Key Laboratory for Drug Resistance Tuberculosis Research, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing 101149, P. R. China
| | - Zhaogang Sun
- National Tuberculosis Clinical Laboratory, Beijing Chest Hospital, Capital Medical University, Beijing 101149, P. R. China.,Beijing Key Laboratory for Drug Resistance Tuberculosis Research, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing 101149, P. R. China
| | - Niaz Banaei
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA.,Clinical Microbiology Laboratory, Stanford University Medical Center, Palo Alto, CA 94304, USA.,Division of Infectious Diseases and Geographic Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Demir Akin
- Center for Cancer Nanotechnology Excellence, Department of Radiology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Jianghong Rao
- Departments of Radiology and Chemistry, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, CA 94305, USA.
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54
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Durkee MS, Cirillo JD, Maitland KC. Fluorescence modeling of in vivo optical detection of Mycobacterium tuberculosis. BIOMEDICAL OPTICS EXPRESS 2019; 10:5445-5460. [PMID: 31646057 PMCID: PMC6788618 DOI: 10.1364/boe.10.005445] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/23/2019] [Accepted: 09/23/2019] [Indexed: 05/03/2023]
Abstract
Tuberculosis is one of the deadliest infectious diseases worldwide. New tools to study pathogenesis and monitor subjects in pre-clinical studies to develop treatment regimens are critical for progress. We developed an improved optical system for detecting bacteria in lungs of mice using internal illumination. We present a computational optical model of the full mouse torso to characterize the optical system. Simulated theoretical limits for the lowest detectable bacterial load support the experimental improvements with an internal illumination source, and suggest that protocol improvements could further lower the detection threshold.
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Affiliation(s)
- Madeleine S. Durkee
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Jeffrey D. Cirillo
- Department of Microbial Pathogenesis and Immunology, Texas A&M College of Medicine, Bryan, TX 77807, USA
| | - Kristen C. Maitland
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
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55
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Zhao M, Gao Y, Ye S, Ding J, Wang A, Li P, Shi H. A light-up near-infrared probe with aggregation-induced emission characteristics for highly sensitive detection of alkaline phosphatase. Analyst 2019; 144:6262-6269. [PMID: 31566642 DOI: 10.1039/c9an01505a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Developing activatable near-infrared (NIR) probes to specifically monitor and visualize the activities of cancer-related enzymes is highly significant yet challenging in early cancer diagnosis. Taking advantage of the unique photophysical characteristics of aggregation-induced emission (AIE) fluorophores, here we design and synthesize a novel activatable probe QMTP by conjugating an AIE fluorophore quinolone-malononitrile to a hydrophilic phosphate-modified phenol group. The probe was initially non-fluorescent in aqueous solution due to its good water solubility, but was readily activated to generate a strong NIR fluorescence upon treatment with alkaline phosphatase (ALP), which enables specific detection of ALP activity. Furthermore, we have employed QMTP to monitor and spatially map the activity of endogenous ALP both in cancer cells and in drug-treated zebrafish larvae. The experimental results reveal that the QMTP probe has great specificity and sensitivity for ALP detection. We thus believe that our work offers a promising tool for accurate detection of ALP-associated diseases in preclinical applications.
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Affiliation(s)
- Meng Zhao
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, P. R. China.
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56
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Synthesis of Ergosterol Peroxide Conjugates as Mitochondria Targeting Probes for Enhanced Anticancer Activity. Molecules 2019; 24:molecules24183307. [PMID: 31514398 PMCID: PMC6766909 DOI: 10.3390/molecules24183307] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/10/2019] [Accepted: 09/10/2019] [Indexed: 01/19/2023] Open
Abstract
Inspired by the significant bioactivity of ergosterol peroxide, we designed and synthesized four fluorescent coumarin and ergosterol peroxide conjugates 8a–d through the combination of ergosterol peroxide with 7-N,N-diethylamino coumarins fluorophore. The cytotoxicity of synthesized conjugates against three human cancer cells (HepG2, SK-Hep1, and MCF-7) was evaluated. The results of fluorescent imaging showed that the synthesized conjugates 8a–d localized and enriched mainly in mitochondria, leading to significantly enhanced cytotoxicity over ergosterol peroxide. Furthermore, the results of biological functions of 8d showed that it could suppress cell colony formation, invasion, and migration; induce G2/M phase arrest of HepG2 cells, and increase the intracellular ROS level.
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57
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Paredes J, Miguel D, Resa S, Gonzalez-Garcia M, Diaz-Torres Y, Cuerva J, Crovetto L. Design, synthesis and photophysical studies of improved xanthene dye to detect acetate. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.11.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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58
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Chen Y, Xu M, Xu W, Song H, Hu L, Xue S, Zhang S, Qian X, Xie H. Highly selective and wash-free visualization of resistant bacteria with a relebactam-derived fluorogenic probe. Chem Commun (Camb) 2019; 55:9919-9922. [DOI: 10.1039/c9cc04533c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unprecedented relebactam-based fluorogenic probe is reported for the wash-free imaging of resistant bacteria.
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Affiliation(s)
- Yefeng Chen
- 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
| | - Minqiu Xu
- 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
| | - Weipan Xu
- 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
| | - Heng Song
- 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
| | - Liqiang Hu
- 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
| | - Shuyuan Xue
- 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
| | - Shuangzhan Zhang
- 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
| | - Xiana Qian
- 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
| | - 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
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59
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Qian X, Zhang S, Xue S, Mao W, Xu M, Xu W, Xie H. A carbapenem-based fluorescence assay for the screening of metallo-β-lactamase inhibitors. Bioorg Med Chem Lett 2019; 29:322-325. [DOI: 10.1016/j.bmcl.2018.11.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 11/05/2018] [Accepted: 11/09/2018] [Indexed: 10/27/2022]
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60
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Abstract
This book chapter describes the use of droplet microfluidics to phenotype single cells. The basic process flow includes the encapsulation of single cells with a specific probe into aqueous micro-droplets suspended in a biocompatible oil. The probe is chosen to measure the phenotype of interest. After incubation, the encapsulated cell turns the probe fluorescent and renders the entire droplet fluorescent. Enumerating drops that are fluorescent quantifies the concentration of cells possessing the phenotype of interest. Examining the distribution of fluorescence further allows one to quantify the heterogeneity among the cell population.
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Affiliation(s)
- Fengjiao Lyu
- Department of Mechanical Engineering, Stanford University, Stanford, CA, United States
| | - Lucas R Blauch
- Department of Mechanical Engineering, Stanford University, Stanford, CA, United States
| | - Sindy K Y Tang
- Department of Mechanical Engineering, Stanford University, Stanford, CA, United States.
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61
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Santos VS, Goletti D, Kontogianni K, Adams ER, Molina-Moya B, Dominguez J, Crudu V, Martins-Filho PRS, Ruhwald M, Lawson L, Bimba JS, Garcia-Basteiro AL, Petrone L, Kabeer BS, Reither K, Cuevas LE. Acute phase proteins and IP-10 as triage tests for the diagnosis of tuberculosis: systematic review and meta-analysis. Clin Microbiol Infect 2018; 25:169-177. [PMID: 30076971 DOI: 10.1016/j.cmi.2018.07.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 06/26/2018] [Accepted: 07/18/2018] [Indexed: 01/23/2023]
Abstract
OBJECTIVES We examined the data reported in studies for diagnostic purposes and to discuss whether their intended use could be extended to triage, as rule-in or rule-out tests to select individuals who should undergo further confirmatory tests. METHODS We searched Scopus, PubMed and Web of Science with the terms 'acute phase proteins,' 'IP-10,' 'tuberculosis,' 'screening' and 'diagnosis,' extracted the sensitivity and specificity of the biomarkers and explored methodologic differences to explain performance variations. Summary estimates were calculated using random-effects models for overall pooled accuracy. The hierarchical summary receiver operating characteristic model was used for meta-analysis. RESULTS We identified 14, four and one studies for C-reactive protein (CRP), interferon γ-induced protein 10 (IP-10) and alpha-1-acid glycoprotein (AGP). The pooled CRP sensitivity/specificity (95% confidence interval) was 89% (80-96) and 57% (36-65). Sensitivity/specificity were higher in high-tuberculosis-burden countries (90%/64%), HIV-infected individuals (91%/61%) and community-based studies (90%/62%). IP-10 sensitivity/specificity in TB vs. non-TB studies was 85%/63% and in TB and HIV coinfected vs. other lung conditions 94%/21%. However, IP-10 studies included diverse populations and a high risk of bias, resulting in very low-quality evidence. AGP had 86%/93% sensitivity/specificity. CONCLUSIONS Few studies have evaluated CRP, IP-10 and AGP for the triage of symptomatic patients. Their high sensitivity and moderate specificity warrant further prospective studies exploring whether their combined use could optimize performance.
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Affiliation(s)
- V S Santos
- Centre for Epidemiology and Public Health, Federal University of Alagoas, Arapiraca, Brazil
| | - D Goletti
- Department of Clinical and Clinical Research, 'L. Spallanzani' National Institute for Infectious Diseases (INMI), IRCCS, Rome, Italy
| | - K Kontogianni
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom
| | - E R Adams
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom
| | - B Molina-Moya
- Servei de Microbiologia, Hospital Universitari Germans Trias i Pujol, Institut d'Investigació Germans Trias i Pujol, Universitat Autònoma de Barcelona, Carretera del Canyet s/n, 08916, Badalona, Spain
| | - J Dominguez
- Servei de Microbiologia, Hospital Universitari Germans Trias i Pujol, Institut d'Investigació Germans Trias i Pujol, Universitat Autònoma de Barcelona, Carretera del Canyet s/n, 08916, Badalona, Spain
| | - V Crudu
- National TB Reference Laboratory, Phthisiopneumology Institute 'Chiril Draganiuc,' Chişinău, Republic of Moldova
| | - P R S Martins-Filho
- Investigative Pathology Laboratory, Federal University of Sergipe, Aracaju, Brazil
| | - M Ruhwald
- Center for Vaccine Research, Statens Serum Institut, Copenhagen, Denmark
| | - L Lawson
- Zankli Research Laboratory, Bingham University, Nassarawa State, Nigeria
| | - J S Bimba
- Zankli Research Laboratory, Bingham University, Nassarawa State, Nigeria
| | - A L Garcia-Basteiro
- Centro de Investigação em Saude de Manhiça (CISM), Rua 12, Cambeve CP 1929, Maputo, Mozambique; Amsterdam Institute for Global Health (AIGHD), Amsterdam, The Netherlands; Barcelona Institute for Global Health (ISGLobal), Barcelona, Spain
| | - L Petrone
- Department of Clinical and Clinical Research, 'L. Spallanzani' National Institute for Infectious Diseases (INMI), IRCCS, Rome, Italy
| | - B S Kabeer
- Department of Clinical and Clinical Research, 'L. Spallanzani' National Institute for Infectious Diseases (INMI), IRCCS, Rome, Italy
| | - K Reither
- Swiss Tropical and Public Health Institute, Basel, Switzerland; University of Basel, Basel, Switzerland
| | - L E Cuevas
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom.
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62
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Chan HL, Lyu L, Aw J, Zhang W, Li J, Yang HH, Hayashi H, Chiba S, Xing B. Unique Fluorescent Imaging Probe for Bacterial Surface Localization and Resistant Enzyme Imaging. ACS Chem Biol 2018; 13:1890-1896. [PMID: 29595947 DOI: 10.1021/acschembio.8b00172] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Emergence of antibiotic bacterial resistance has caused serious clinical issues worldwide due to increasingly difficult treatment. Development of a specific approach for selective visualization of resistant bacteria will be highly significant for clinical investigations to promote timely diagnosis and treatment of bacterial infections. In this article, we present an effective method that not only is able to selectively recognize drug resistant AmpC β-lactamases enzyme but, more importantly, is able to interact with bacterial cell wall components, resulting in a desired localization effect on the bacterial surface. A unique and specific enzyme-responsive cephalosporin probe (DFD-1) has been developed for the selective recognition of resistance bacteria AmpC β-lactamase, by employing fluorescence resonance energy transfer with an "off-on" bioimaging. To achieve the desired localization, a lipid-azide conjugate (LA-12) was utilized to facilitate its penetration into the bacterial surface, followed by copper-free click chemistry. This enables the probe DFD-1 to be anchored onto the cell surface. In the presence of AmpC enzymes, the cephalosporin β-lactam ring on DFD-1 will be hydrolyzed, leading to the quencher release, thus generating fluorescence for real-time resistant bacterial screening. More importantly, the bulky dibenzocyclooctyne group in DFD-1 allowed selective recognition toward the AmpC bacterial enzyme instead of its counterpart ( e.g., TEM-1 β-lactamase). Both live cell imaging and cell cytometry assays showed the great selectivity of DFD-1 to drug resistant bacterial pathogens containing the AmpC enzyme with significant fluorescence enhancement (∼67-fold). This probe presented promising capability to selectively localize and screen for AmpC resistance bacteria, providing great promise for clinical microbiological applications.
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Affiliation(s)
- Hui Ling Chan
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Linna Lyu
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Junxin Aw
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Wenmin Zhang
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Juan Li
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Huang-Hao Yang
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Hirohito Hayashi
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Bengang Xing
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
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63
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Ji H, Wu L, Pu F, Ren J, Qu X. Point-of-Care Identification of Bacteria Using Protein-Encapsulated Gold Nanoclusters. Adv Healthc Mater 2018; 7:e1701370. [PMID: 29498235 DOI: 10.1002/adhm.201701370] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Revised: 01/29/2018] [Indexed: 01/07/2023]
Abstract
The rapid, simple, and reliable identification of the most prevalent pathogens is essential for clinical diagnostics, biology, and food safety. Herein, four protein-encapsulated gold nanoclusters (protein-AuNCs) are designed and prepared as a sensor array for rapid identification of bacteria. The discrimination of six kinds of bacteria, including two kinds of drug-resistant bacteria, is successfully realized by the as-fabricated sensor array. The strategy presented here shows the advantages of easy synthesis and convenient to use. Furthermore, 100% classification accuracy is achieved by the sensor array consisting of two protein-AuNCs probes, demonstrating the design with sufficient diagnostic capacity. Taken together, the developed sensor array holds great promise for facile diagnosis of bacterial infection in resource-limited settings.
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Affiliation(s)
- Haiwei Ji
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun Jilin 130022 China
- School of Chemistry and Pharmaceutical Engineering; Taishan Medical University; Shandong Taian 271016 China
| | - Li Wu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun Jilin 130022 China
- Department of Chemistry; University of Washington; Seattle WA 98195 USA
| | - Fang Pu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun Jilin 130022 China
| | - Jinsong Ren
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun Jilin 130022 China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun Jilin 130022 China
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64
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Trousil J, Ulmann V, Hrubý M. Fluorescence & bioluminescence in the quest for imaging, probing & analysis of mycobacterial infections. Future Microbiol 2018; 13:933-951. [PMID: 29893148 DOI: 10.2217/fmb-2017-0296] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Mycobacterioses represent a global health problem and rapid diagnostic improvements are urgently required. Mycobacteria-specific fluorescence and bioluminescence phenomena have been found to be useful for a wide range of mycobacteria-focused research. Here, we present a critical survey of the most promising techniques in this field and the potential of new methods under investigation. These approaches include acid-fast staining, intrinsic fluorescence of the coenzyme F420, fluorogenic substrates (e.g., β-lactamase-sensitive coumpounds) and recombination of mycobacteria or mycobacteriophages. Probably the most interesting and emerging host-inspecting approach is in vivo imaging. Detection of fluorescence in vivo, however, is complicated by light scattering, light absorption, and autofluorescence, caused by the tissues. Despite this, many of these systems show promise as the foundations for improved rapid analysis and imaging of mycobacterial infections, both in vitro and in vivo.
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Affiliation(s)
- Jiří Trousil
- Department of Supramolecular Polymer Systems, Institute of Macromolecular Chemistry of the Academy of Sciences of the Czech Republic, Heyrovského náměstí 2, 162 06 Prague 6, Czech Republic.,Department of Analytical Chemistry, Charles University, Faculty of Science, Hlavova 8, 128 43 Praha 2, Czech Republic
| | - Vít Ulmann
- Laboratory for Mycobacterial Diagnostics and Tuberculosis, Regional Institute of Public Health in Ostrava, Partyzánské náměstí 7, 702 00 Ostrava, Czech Republic
| | - Martin Hrubý
- Department of Supramolecular Polymer Systems, Institute of Macromolecular Chemistry of the Academy of Sciences of the Czech Republic, Heyrovského náměstí 2, 162 06 Prague 6, Czech Republic
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65
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Mao W, Wang Y, Qian X, Xia L, Xie H. A Carbapenem‐Based Off–On Fluorescent Probe for Specific Detection of Metallo‐β‐Lactamase Activities. Chembiochem 2018; 20:511-515. [DOI: 10.1002/cbic.201800126] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Indexed: 12/14/2022]
Affiliation(s)
- Wuyu Mao
- State Key Laboratory of Bioreactor EngineeringShanghai Key Laboratory of New Drug DesignSchool of PharmacyEast China University of Science and Technology Shanghai 200237 P.R. China
| | - Yaqun Wang
- State Key Laboratory of Bioreactor EngineeringShanghai Key Laboratory of New Drug DesignSchool of PharmacyEast China University of Science and Technology Shanghai 200237 P.R. China
| | - Xiana Qian
- State Key Laboratory of Bioreactor EngineeringShanghai Key Laboratory of New Drug DesignSchool of PharmacyEast China University of Science and Technology Shanghai 200237 P.R. China
| | - Lingying Xia
- State Key Laboratory of Bioreactor EngineeringShanghai Key Laboratory of New Drug DesignSchool of PharmacyEast China University of Science and Technology Shanghai 200237 P.R. China
| | - Hexin Xie
- State Key Laboratory of Bioreactor EngineeringShanghai Key Laboratory of New Drug DesignSchool of PharmacyEast China University of Science and Technology Shanghai 200237 P.R. China
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66
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Zaengle-Barone JM, Jackson AC, Besse DM, Becken B, Arshad M, Seed PC, Franz KJ. Copper Influences the Antibacterial Outcomes of a β-Lactamase-Activated Prochelator against Drug-Resistant Bacteria. ACS Infect Dis 2018; 4:1019-1029. [PMID: 29557647 PMCID: PMC6252259 DOI: 10.1021/acsinfecdis.8b00037] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The unabated rise in bacterial resistance to conventional antibiotics, coupled with collateral damage to normal flora incurred by overuse of broad-spectrum antibiotics, necessitates the development of new antimicrobials targeted against pathogenic organisms. Here, we explore the antibacterial outcomes and mode of action of a prochelator that exploits the production of β-lactamase enzymes by drug-resistant bacteria to convert a nontoxic compound into a metal-binding antimicrobial agent directly within the microenvironment of pathogenic organisms. Compound PcephPT (phenylacetamido-cephem-pyrithione) contains a cephalosporin core linked to 2-mercaptopyridine N-oxide (pyrithione) via one of its metal-chelating atoms, which minimizes its preactivation interaction with metal ions and its cytotoxicity. Spectroscopic and chromatographic assays indicate that PcephPT releases pyrithione in the presence of β-lactamase-producing bacteria. The prochelator shows enhanced antibacterial activity against strains expressing β-lactamases, with bactericidal efficacy improved by the presence of low-micromolar copper in the growth medium. Metal analysis shows that cell-associated copper accumulation by the prochelator is significantly lower than that induced by pyrithione itself, suggesting that the location of pyrithione release influences biological outcomes. Low-micromolar (4-8 μg/mL) minimum inhibitory concentration (MIC) values of PcephPT in ceftriaxone-resistant bacteria compared with median lethal dose (LD50) values greater than 250 μM in mammalian cells suggests favorable selectivity. Further investigation into the mechanisms of prochelators will provide insight for the design of new antibacterial agents that manipulate cellular metallobiology as a strategy against infection.
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Affiliation(s)
| | - Abigail C. Jackson
- Department of Chemistry, Duke University, 124 Science Dr. Durham, North Carolina 27708, United States
| | - David M. Besse
- Department of Chemistry, Duke University, 124 Science Dr. Durham, North Carolina 27708, United States
| | - Bradford Becken
- Department of Pediatrics, Duke University, Durham, North Carolina 27710, United States
| | - Mehreen Arshad
- Department of Pediatrics, Duke University, Durham, North Carolina 27710, United States
| | - Patrick C. Seed
- Ann and Robert H. Lurie Children’s Hospital and Stanley Manne Children’s Research Institute, 225 E. Chicago Ave. Chicago, Illinois 60611, United States
- Department of Microbiology and Immunology, Northwestern University, 300 E. Superior St. Chicago, Illinois 60611, United States
| | - Katherine J. Franz
- Department of Chemistry, Duke University, 124 Science Dr. Durham, North Carolina 27708, United States
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67
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Kolbe K, Veleti SK, Johnson EE, Cho YW, Oh S, Barry CE. Role of Chemical Biology in Tuberculosis Drug Discovery and Diagnosis. ACS Infect Dis 2018; 4:458-466. [PMID: 29364647 DOI: 10.1021/acsinfecdis.7b00242] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The use of chemical techniques to study biological systems (often referred to currently as chemical biology) has become a powerful tool for both drug discovery and the development of novel diagnostic strategies. In tuberculosis, such tools have been applied to identifying drug targets from hit compounds, matching high-throughput screening hits against large numbers of isolated protein targets and identifying classes of enzymes with important functions. Metabolites unique to mycobacteria have provided important starting points for the development of innovative tools. For example, the unique biology of trehalose has provided both novel diagnostic strategies as well as probes of in vivo biological processes that are difficult to study any other way. Other mycobacterial metabolites are potentially valuable starting points and have the potential to illuminate new aspects of mycobacterial pathogenesis.
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Affiliation(s)
- Katharina Kolbe
- Tuberculosis Research Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Disease, NIH, Bethesda, Maryland 20892, United States
| | - Sri Kumar Veleti
- Tuberculosis Research Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Disease, NIH, Bethesda, Maryland 20892, United States
| | - Emma E. Johnson
- Tuberculosis Research Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Disease, NIH, Bethesda, Maryland 20892, United States
| | - Young-Woo Cho
- Tuberculosis Research Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Disease, NIH, Bethesda, Maryland 20892, United States
| | - Sangmi Oh
- Tuberculosis Research Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Disease, NIH, Bethesda, Maryland 20892, United States
| | - Clifton E. Barry
- Tuberculosis Research Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Disease, NIH, Bethesda, Maryland 20892, United States
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68
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Kamariza M, Shieh P, Ealand CS, Peters JS, Chu B, Rodriguez-Rivera FP, Babu Sait MR, Treuren WV, Martinson N, Kalscheuer R, Kana BD, Bertozzi CR. Rapid detection of Mycobacterium tuberculosis in sputum with a solvatochromic trehalose probe. Sci Transl Med 2018; 10:eaam6310. [PMID: 29491187 PMCID: PMC5985656 DOI: 10.1126/scitranslmed.aam6310] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 02/06/2018] [Indexed: 01/05/2023]
Abstract
Tuberculosis (TB) is the leading cause of death from an infectious bacterial disease. Poor diagnostic tools to detect active disease plague TB control programs and affect patient care. Accurate detection of live Mycobacterium tuberculosis (Mtb), the causative agent of TB, could improve TB diagnosis and patient treatment. We report that mycobacteria and other corynebacteria can be specifically detected with a fluorogenic trehalose analog. We designed a 4-N,N-dimethylamino-1,8-naphthalimide-conjugated trehalose (DMN-Tre) probe that undergoes >700-fold increase in fluorescence intensity when transitioned from aqueous to hydrophobic environments. This enhancement occurs upon metabolic conversion of DMN-Tre to trehalose monomycolate and incorporation into the mycomembrane of Actinobacteria. DMN-Tre labeling enabled the rapid, no-wash visualization of mycobacterial and corynebacterial species without nonspecific labeling of Gram-positive or Gram-negative bacteria. DMN-Tre labeling was detected within minutes and was inhibited by heat killing of mycobacteria. Furthermore, DMN-Tre labeling was reduced by treatment with TB drugs, unlike the clinically used auramine stain. Lastly, DMN-Tre labeled Mtb in TB-positive human sputum samples comparably to auramine staining, suggesting that this operationally simple method may be deployable for TB diagnosis.
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Affiliation(s)
| | - Peyton Shieh
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Christopher S Ealand
- Department of Science and Technology/National Research Foundation Centre of Excellence for Biomedical Tuberculosis Research, Faculty of Health Sciences, University of Witwatersrand, National Health Laboratory Service, Johannesburg, South Africa
| | - Julian S Peters
- Department of Science and Technology/National Research Foundation Centre of Excellence for Biomedical Tuberculosis Research, Faculty of Health Sciences, University of Witwatersrand, National Health Laboratory Service, Johannesburg, South Africa
| | - Brian Chu
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | | | - Mohammed R Babu Sait
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich Heine University Duesseldorf, Universitätsstrasse 1, 40225 Duesseldorf, Germany
| | - William V Treuren
- Department of Microbiology and Immunology, Stanford University, Stanford, CA 94305, USA
| | - Neil Martinson
- Department of Science and Technology/National Research Foundation Centre of Excellence for Biomedical Tuberculosis Research, Faculty of Health Sciences, University of Witwatersrand, National Health Laboratory Service, Johannesburg, South Africa
- Perinatal HIV Research Unit (PHRU), SA MRC Soweto Matlosana Collaborating Centre for HIV/AIDS and TB, University of the Witwatersrand, Johannesburg, South Africa
| | - Rainer Kalscheuer
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich Heine University Duesseldorf, Universitätsstrasse 1, 40225 Duesseldorf, Germany
| | - Bavesh D Kana
- Department of Science and Technology/National Research Foundation Centre of Excellence for Biomedical Tuberculosis Research, Faculty of Health Sciences, University of Witwatersrand, National Health Laboratory Service, Johannesburg, South Africa
- Medical Research Council-Centre for the AIDS Programme of Research in South Africa (CAPRISA) HIV-TB Pathogenesis and Treatment Research Unit, Durban, South Africa
| | - Carolyn R Bertozzi
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA.
- Howard Hughes Medical Institute, Stanford University, Stanford, CA 94305, USA
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69
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Sharan R, Yang HJ, Sule P, Cirillo JD. Imaging Mycobacterium tuberculosis in Mice with Reporter Enzyme Fluorescence. J Vis Exp 2018:56801. [PMID: 29553533 PMCID: PMC5931367 DOI: 10.3791/56801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Reporter enzyme fluorescence (REF) utilizes substrates that are specific for enzymes present in target organisms of interest for imaging or detection by fluorescence or bioluminescence. We utilize BlaC, an enzyme expressed constitutively by all M. tuberculosis strains. REF allows rapid quantification of bacteria in lungs of infected mice. The same group of mice can be imaged at many time points, greatly reducing costs, enumerating bacteria more quickly, allowing novel observations in host-pathogen interactions, and increasing statistical power, since more animals per group are readily maintained. REF is extremely sensitive due to the catalytic nature of the BlaC enzymatic reporter and specific due to the custom flourescence resonance energy transfer (FRET) or fluorogenic substrates used. REF does not require recombinant strains, ensuring normal host-pathogen interactions. We describe the imaging of M. tuberculosis infection using a FRET substrate with maximal emission at 800 nm. The wavelength of the substrate allows sensitive deep tissue imaging in mammals. We will outline aerosol infection of mice with M. tuberculosis, anesthesia of mice, administration of the REF substrate, and optical imaging. This method has been successfully applied to evaluating host-pathogen interactions and efficacy of antibiotics targeting M. tuberculosis.
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Affiliation(s)
- Riti Sharan
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center
| | - Hee-Jeong Yang
- Tuberculosis Research Section, Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health
| | - Preeti Sule
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center
| | - Jeffrey D Cirillo
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center;
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70
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Fluorescent Antibiotics: New Research Tools to Fight Antibiotic Resistance. Trends Biotechnol 2018; 36:523-536. [PMID: 29478675 DOI: 10.1016/j.tibtech.2018.01.004] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 01/10/2018] [Accepted: 01/11/2018] [Indexed: 01/02/2023]
Abstract
Better understanding how multidrug-resistant (MDR) bacteria can evade current and novel antibiotics requires a better understanding of the chemical biology of antibiotic action. This necessitates using new tools and techniques to advance our knowledge of bacterial responses to antibiotics, ideally in live cells in real time, to selectively investigate bacterial growth, division, metabolism, and resistance in response to antibiotic challenge. In this review, we discuss the preparation and biological evaluation of fluorescent antibiotics, focussing on how these reporters and assay methods can help elucidate resistance mechanisms. We also examine the potential utility of such probes for real-time in vivo diagnosis of infections.
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71
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Bag SS, Yashmeen A. Sensing the chemical cleavage of fluorescent β-lactams via FRET/exciplex or excimer emission. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.12.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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72
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Elings W, Tassoni R, van der Schoot SA, Luu W, Kynast JP, Dai L, Blok AJ, Timmer M, Florea BI, Pannu NS, Ubbink M. Phosphate Promotes the Recovery of Mycobacterium tuberculosis β-Lactamase from Clavulanic Acid Inhibition. Biochemistry 2017; 56:6257-6267. [PMID: 29087696 PMCID: PMC5707625 DOI: 10.1021/acs.biochem.7b00556] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
![]()
The rise of multi-
and even totally antibiotic resistant forms
of Mycobacterium tuberculosis underlines the need
for new antibiotics. The pathogen is resistant to β-lactam compounds
due to its native serine β-lactamase, BlaC. This resistance
can be circumvented by administration of a β-lactamase inhibitor.
We studied the interaction between BlaC and the inhibitor clavulanic
acid. Our data show hydrolysis of clavulanic acid and recovery of
BlaC activity upon prolonged incubation. The rate of clavulanic acid
hydrolysis is much higher in the presence of phosphate ions. A specific
binding site for phosphate is identified in the active site pocket,
both in the crystalline state and in solution. NMR spectroscopy experiments
show that phosphate binds to this site with a dissociation constant
of 30 mM in the free enzyme. We conclude that inhibition of BlaC by
clavulanic acid is reversible and that phosphate ions can promote
the hydrolysis of the inhibitor.
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Affiliation(s)
- Wouter Elings
- Leiden Institute of Chemistry, Leiden University , Einsteinweg 55, Leiden, The Netherlands
| | - Raffaella Tassoni
- Leiden Institute of Chemistry, Leiden University , Einsteinweg 55, Leiden, The Netherlands
| | | | - Wendy Luu
- Leiden Institute of Chemistry, Leiden University , Einsteinweg 55, Leiden, The Netherlands
| | - Josef P Kynast
- Leiden Institute of Chemistry, Leiden University , Einsteinweg 55, Leiden, The Netherlands
| | - Lin Dai
- Leiden Institute of Chemistry, Leiden University , Einsteinweg 55, Leiden, The Netherlands
| | - Anneloes J Blok
- Leiden Institute of Chemistry, Leiden University , Einsteinweg 55, Leiden, The Netherlands
| | - Monika Timmer
- Leiden Institute of Chemistry, Leiden University , Einsteinweg 55, Leiden, The Netherlands
| | - Bogdan I Florea
- Leiden Institute of Chemistry, Leiden University , Einsteinweg 55, Leiden, The Netherlands
| | - Navraj S Pannu
- Leiden Institute of Chemistry, Leiden University , Einsteinweg 55, Leiden, The Netherlands
| | - Marcellus Ubbink
- Leiden Institute of Chemistry, Leiden University , Einsteinweg 55, Leiden, The Netherlands
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73
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Song A, Cheng Y, Xie J, Banaei N, Rao J. Intramolecular substitution uncages fluorogenic probes for detection of metallo-carbapenemase-expressing bacteria. Chem Sci 2017; 8:7669-7674. [PMID: 29568429 PMCID: PMC5849144 DOI: 10.1039/c7sc02416a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Accepted: 09/21/2017] [Indexed: 12/18/2022] Open
Abstract
This work reports a novel caging strategy for designing fluorogenic probes to detect the activity of β-lactamases. The caging strategy uses a thiophenyl linker connected to a fluorophore caged by a good leaving group-dinitrophenyl. The uncaging proceeds in two steps through the sulfa-releasing and subsequent intramolecular substitution. The length of the linker has been examined and optimized to maximize the rate of intramolecular reaction and thus the rate of fluorescence activation. Finally based on this strategy, we prepared a green fluorogenic probe CAT-7 and validated its selectivity for detecting metallo-carbapenemases (VIM-27, IMP-1, NDM-1) in carbapenem-resistant Enterobacteriaceae (CRE) lysates.
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Affiliation(s)
- Aiguo Song
- Molecular Imaging Program at Stanford , Departments of Radiology and Chemistry , Stanford University , 1201 Welch Road , Stanford , CA 94305-5484 , USA .
| | - Yunfeng Cheng
- Molecular Imaging Program at Stanford , Departments of Radiology and Chemistry , Stanford University , 1201 Welch Road , Stanford , CA 94305-5484 , USA .
| | - Jinghang Xie
- Molecular Imaging Program at Stanford , Departments of Radiology and Chemistry , Stanford University , 1201 Welch Road , Stanford , CA 94305-5484 , USA .
| | - Niaz Banaei
- Department of Pathology , Clinical Microbiology Laboratory , Stanford Hospital and Clinics , Palo Alto , CA 94304 , USA
| | - Jianghong Rao
- Molecular Imaging Program at Stanford , Departments of Radiology and Chemistry , Stanford University , 1201 Welch Road , Stanford , CA 94305-5484 , USA .
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74
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Gliddon HD, Herberg JA, Levin M, Kaforou M. Genome-wide host RNA signatures of infectious diseases: discovery and clinical translation. Immunology 2017; 153:171-178. [PMID: 28921535 PMCID: PMC5765383 DOI: 10.1111/imm.12841] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 09/11/2017] [Accepted: 09/11/2017] [Indexed: 12/31/2022] Open
Abstract
The use of whole blood gene expression to derive diagnostic biomarkers capable of distinguishing between phenotypically similar diseases holds great promise but remains a challenge. Differential gene expression analysis is used to identify the key genes that undergo changes in expression relative to healthy individuals, as well as to patients with other diseases. These key genes can act as diagnostic, prognostic and predictive markers of disease. Gene expression ‘signatures’ in the blood hold the potential to be used for the diagnosis of infectious diseases, where current diagnostics are unreliable, ineffective or of limited potential. For diagnostic tests based on RNA signatures to be useful clinically, the first step is to identify the minimum set of gene transcripts that accurately identify the disease in question. The second requirement is rapid and cost‐effective detection of the gene expression levels. Signatures have been described for a number of infectious diseases, but ‘clinic‐ready’ technologies for RNA detection from clinical samples are limited, though existing methods such as RT‐PCR are likely to be superseded by a number of emerging technologies, which may form the basis of the translation of gene expression signatures into routine diagnostic tests for a range of disease states.
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Affiliation(s)
- Harriet D Gliddon
- London Centre for Nanotechnology, University College London, London, UK
| | | | - Michael Levin
- Department of Medicine, Imperial College London, London, UK
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75
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Staderini M, Megia-Fernandez A, Dhaliwal K, Bradley M. Peptides for optical medical imaging and steps towards therapy. Bioorg Med Chem 2017; 26:2816-2826. [PMID: 29042225 DOI: 10.1016/j.bmc.2017.09.039] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 09/22/2017] [Accepted: 09/29/2017] [Indexed: 12/20/2022]
Abstract
Optical medical imaging is a rapidly growing area of research and development that offers a multitude of healthcare solutions both diagnostically and therapeutically. In this review, some of the most recently described peptide-based optical probes are reviewed with a special emphasis on their in vivo use and potential application in a clinical setting.
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Affiliation(s)
- Matteo Staderini
- School of Chemistry, EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, UK
| | - Alicia Megia-Fernandez
- School of Chemistry, EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, UK
| | - Kevin Dhaliwal
- EPSRC IRC Proteus Hub, MRC Centre of Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Mark Bradley
- School of Chemistry, EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, UK; EPSRC IRC Proteus Hub, MRC Centre of Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK.
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76
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Mao W, Qian X, Zhang J, Xia L, Xie H. Specific Detection of Extended-Spectrum β-Lactamase Activities with a Ratiometric Fluorescent Probe. Chembiochem 2017; 18:1990-1994. [DOI: 10.1002/cbic.201700447] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Wuyu Mao
- 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 P.R. China
| | - Xiana Qian
- 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 P.R. China
| | - Jian Zhang
- 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 P.R. China
| | - Lingying Xia
- 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 P.R. 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 P.R. China
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77
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Mao W, Xie H. Identifying pathogens that carry carbapenemases to help reduce antimicrobial resistance. Future Microbiol 2017; 12:1027-1029. [PMID: 28795876 DOI: 10.2217/fmb-2017-0151] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Wuyu Mao
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science & Technology, Shanghai 200237, China
| | - Hexin Xie
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science & Technology, Shanghai 200237, China
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78
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Oommen S, Banaji N. Laboratory Diagnosis of Tuberculosis: Advances in Technology and Drug Susceptibility Testing. Indian J Med Microbiol 2017; 35:323-331. [DOI: 10.4103/ijmm.ijmm_16_204] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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79
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Yang HJ, Kong Y, Cheng Y, Janagama H, Hassounah H, Xie H, Rao J, Cirillo JD. Real-time Imaging of Mycobacterium tuberculosis, Using a Novel Near-Infrared Fluorescent Substrate. J Infect Dis 2017; 215:405-414. [PMID: 27421748 PMCID: PMC6061879 DOI: 10.1093/infdis/jiw298] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 07/06/2016] [Indexed: 11/14/2022] Open
Abstract
Slow growth of Mycobacterium tuberculosis, the causative agent of tuberculosis, hinders advancement in all areas of research toward prevention and treatment. Real-time imaging with reporter enzyme fluorescence (REF) that uses custom fluorogenic substrates for bacterial enzymes allows rapid and specific detection of M. tuberculosis in live animals. We have synthesized a novel REF substrate, CNIR800, that carries a near-infrared (NIR) fluorochrome IRDye 800CW, with a quencher connected through the lactam ring that is hydrolyzed by the enzyme BlaC (β-lactamase) that is naturally expressed by M. tuberculosis. CNIR800 produces long-wavelength emission at 795 nm upon excitation (745 nm) and exhibits significantly improved signal to noise ratios for detection of M. tuberculosis. The detection threshold with CNIR800 is approximately 100 colony-forming units (CFU) in vitro and <1000 CFU in the lungs of mice. Additionally, fluorescence signal from cleaved CNIR800 reaches maximal levels 4-6 hours after administration in live animals, allowing accurate evaluation of antituberculous drug efficacy. Thus, CNIR800 represents an excellent substrate for accurate detection of M. tuberculosis rapidly and specifically in animals, facilitating research toward understanding pathogenic mechanisms, evaluation of therapeutic outcomes, and screening new vaccines.
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Affiliation(s)
- Hee-Jeong Yang
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Bryan
| | - Ying Kong
- Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis
| | - Yunfeng Cheng
- Department of Radiology, Stanford University, California
| | - Harish Janagama
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Bryan
| | - Hany Hassounah
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Bryan
| | - Hexin Xie
- Department of Radiology, Stanford University, California
| | - Jianghong Rao
- Department of Radiology, Stanford University, California
| | - Jeffrey D Cirillo
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Bryan
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80
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Nooshabadi F, Yang HJ, Cheng Y, Durkee MS, Xie H, Rao J, Cirillo JD, Maitland KC. Intravital excitation increases detection sensitivity for pulmonary tuberculosis by whole-body imaging with β-lactamase reporter enzyme fluorescence. JOURNAL OF BIOPHOTONICS 2017; 10:821-829. [PMID: 27753271 PMCID: PMC5703064 DOI: 10.1002/jbio.201600132] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 08/08/2016] [Accepted: 09/18/2016] [Indexed: 05/08/2023]
Abstract
Tuberculosis is a pulmonary disease with an especially high mortality rate in immuno-compromised populations, specifically children and HIV positive individuals. The causative agent, Mycobacterium tuberculosis (Mtb), is a very slow growing and difficult organism to work with, making both diagnosis and development of effective treatments cumbersome. We utilize a fiber-optic fluorescence microendoscope integrated with a whole-body imaging system for in vivo Mtb detection. The system exploits an endogenous enzyme of Mtb (β-lactamase, or BlaC) using a BlaC-specific NIR fluorogenic substrate. In the presence of BlaC, this substrate is cleaved and becomes fluorescent. Using intravital illumination of the lung to excite this probe, sensitivity of the optical system increases over trans- and epi-illumination methods of whole-body fluorescence imaging. We demonstrate that integration of these imaging technologies with BlaC-specific fluorescent reporter probe improves the level of detection to ∼100 colony forming units, a 100× increase in sensitivity in comparison to epi-illumination and a 10× increase in sensitivity in comparison to previous work in intravital excitation of tdTomato-expressing Mtb. This lower detection threshold enables the study of early stage bacterial infections with clinical strains of Mtb and longitudinal studies of disease pathogenesis and therapeutic efficacy with multiple time points in a single animal.
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Affiliation(s)
- Fatemeh Nooshabadi
- Biomedical Engineering Department, 3120 TAMU, Texas A&M University, College Station, TX 77843, United States
| | - Hee-Jeong Yang
- Microbial Pathogenesis and Immunology Department, Texas A&M University Health Science Center, Bryan, Texas 77807, United States
| | - Yunfeng Cheng
- Radiology Department, Stanford University, Stanford, CA 94304, United States
| | - Madeleine S. Durkee
- Biomedical Engineering Department, 3120 TAMU, Texas A&M University, College Station, TX 77843, United States
| | - Hexin Xie
- Radiology Department, Stanford University, Stanford, CA 94304, United States
| | - Jianghong Rao
- Radiology Department, Stanford University, Stanford, CA 94304, United States
| | - Jeffrey D. Cirillo
- Microbial Pathogenesis and Immunology Department, Texas A&M University Health Science Center, Bryan, Texas 77807, United States
| | - Kristen C. Maitland
- Biomedical Engineering Department, 3120 TAMU, Texas A&M University, College Station, TX 77843, United States
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81
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Nooshabadi F, Yang HJ, Cheng Y, Durkee MS, Xie H, Rao J, Cirillo JD, Maitland KC. Intravital excitation increases detection sensitivity for pulmonary tuberculosis by whole-body imaging with β-lactamase reporter enzyme fluorescence. JOURNAL OF BIOPHOTONICS 2017; 10:821-829. [PMID: 27753271 DOI: 10.1002/jbio.v10.6-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 08/08/2016] [Accepted: 09/18/2016] [Indexed: 05/22/2023]
Abstract
Tuberculosis is a pulmonary disease with an especially high mortality rate in immuno-compromised populations, specifically children and HIV positive individuals. The causative agent, Mycobacterium tuberculosis (Mtb), is a very slow growing and difficult organism to work with, making both diagnosis and development of effective treatments cumbersome. We utilize a fiber-optic fluorescence microendoscope integrated with a whole-body imaging system for in vivo Mtb detection. The system exploits an endogenous enzyme of Mtb (β-lactamase, or BlaC) using a BlaC-specific NIR fluorogenic substrate. In the presence of BlaC, this substrate is cleaved and becomes fluorescent. Using intravital illumination of the lung to excite this probe, sensitivity of the optical system increases over trans- and epi-illumination methods of whole-body fluorescence imaging. We demonstrate that integration of these imaging technologies with BlaC-specific fluorescent reporter probe improves the level of detection to ∼100 colony forming units, a 100× increase in sensitivity in comparison to epi-illumination and a 10× increase in sensitivity in comparison to previous work in intravital excitation of tdTomato-expressing Mtb. This lower detection threshold enables the study of early stage bacterial infections with clinical strains of Mtb and longitudinal studies of disease pathogenesis and therapeutic efficacy with multiple time points in a single animal.
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Affiliation(s)
- Fatemeh Nooshabadi
- Biomedical Engineering Department, 3120 TAMU, Texas A&M University, College Station, TX, 77843, United States
| | - Hee-Jeong Yang
- Microbial Pathogenesis and Immunology Department, Texas A&M University Health Science Center, Bryan, TX, 77807, United States
| | - Yunfeng Cheng
- Radiology Department, Stanford University, Stanford, CA, 94304, United States
| | - Madeleine S Durkee
- Biomedical Engineering Department, 3120 TAMU, Texas A&M University, College Station, TX, 77843, United States
| | - Hexin Xie
- Radiology Department, Stanford University, Stanford, CA, 94304, United States
| | - Jianghong Rao
- Radiology Department, Stanford University, Stanford, CA, 94304, United States
| | - Jeffrey D Cirillo
- Microbial Pathogenesis and Immunology Department, Texas A&M University Health Science Center, Bryan, TX, 77807, United States
| | - Kristen C Maitland
- Biomedical Engineering Department, 3120 TAMU, Texas A&M University, College Station, TX, 77843, United States
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82
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Mao W, Xia L, Xie H. Detection of Carbapenemase-Producing Organisms with a Carbapenem-Based Fluorogenic Probe. Angew Chem Int Ed Engl 2017; 56:4468-4472. [DOI: 10.1002/anie.201612495] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 01/27/2017] [Indexed: 01/22/2023]
Affiliation(s)
- Wuyu Mao
- 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 P.R. China
| | - Lingying Xia
- 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 P.R. 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 P.R. China
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83
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Mao W, Xia L, Xie H. Detection of Carbapenemase-Producing Organisms with a Carbapenem-Based Fluorogenic Probe. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612495] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Wuyu Mao
- 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 P.R. China
| | - Lingying Xia
- 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 P.R. 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 P.R. China
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84
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Yelleswarapu VR, Jeong HH, Yadavali S, Issadore D. Ultra-high throughput detection (1 million droplets per second) of fluorescent droplets using a cell phone camera and time domain encoded optofluidics. LAB ON A CHIP 2017; 17:1083-1094. [PMID: 28225099 DOI: 10.1039/c6lc01489e] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Droplet-based assays-in which ultra-sensitive molecular measurements are made by performing millions of parallel experiments in picoliter droplets-have generated enormous enthusiasm due to their single molecule resolution and robustness to reaction conditions. These assays have great untapped potential for point of care diagnostics but are currently confined to laboratory settings due to the instrumentation necessary to serially generate, control, and measure tens of millions of droplets. To address this challenge, we have developed the microdroplet megascale detector (μMD) that can generate and detect the fluorescence of millions of droplets per second (1000× faster than conventional approaches) using only a conventional cell phone camera. The key innovation of our approach is borrowed from the telecommunications industry, wherein we modulate the excitation light with a pseudorandom sequence that enables individual droplets to be resolved that would otherwise overlap due to the limited frame rate of digital cameras. Using this approach, the μMD measures droplets at a rate of 106 droplets per sec (ϕ = 166 mL h-1) in 120 parallel microfluidic channels and achieves a limit of detection LOD = 1 μM Rhodamine dye, sufficient for typical droplet based assays. We incorporate this new droplet detection technology with our previously reported parallelized droplet production strategy, incorporating 200 parallel droplet makers and only one set of continuous and droplet phase inputs and one output line. By miniaturizing and integrating droplet based diagnostics into a handheld format, the μMD platform can translate ultra-sensitive droplet based assays into a self-contained platform for practical use in clinical and industrial settings.
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Affiliation(s)
- Venkata R Yelleswarapu
- Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
| | - Heon-Ho Jeong
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Sagar Yadavali
- Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
| | - David Issadore
- Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, Pennsylvania, USA. and Department of Electrical and Systems Engineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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85
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Klötzner DP, Klehs K, Heilemann M, Heckel A. A new photoactivatable near-infrared-emitting QCy7 fluorophore for single-molecule super-resolution microscopy. Chem Commun (Camb) 2017; 53:9874-9877. [DOI: 10.1039/c7cc04996j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In this work we present a new photoactivatable QCy7-based fluorophore and demonstrate its application in single-molecule super-resolution microscopy.
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Affiliation(s)
- Dean-Paulos Klötzner
- Goethe University Frankfurt
- Institute of Organic Chemistry and Chemical Biology
- 60438 Frankfurt
- Germany
| | - Kathrin Klehs
- Goethe University Frankfurt
- Institute of Physical and Theoretical Chemistry
- 60438 Frankfurt
- Germany
| | - Mike Heilemann
- Goethe University Frankfurt
- Institute of Physical and Theoretical Chemistry
- 60438 Frankfurt
- Germany
| | - Alexander Heckel
- Goethe University Frankfurt
- Institute of Organic Chemistry and Chemical Biology
- 60438 Frankfurt
- Germany
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86
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Aw J, Widjaja F, Ding Y, Mu J, Liang Y, Xing B. Enzyme-responsive reporter molecules for selective localization and fluorescence imaging of pathogenic biofilms. Chem Commun (Camb) 2017; 53:3330-3333. [DOI: 10.1039/c6cc09296a] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A novel enzyme-responsive reporter molecule (ERM-1) for selective localization of AmpC in pathogenic biofilms.
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Affiliation(s)
- Junxin Aw
- Division of Chemistry and Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore
- Singapore
| | - Frances Widjaja
- Division of Chemistry and Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore
- Singapore
| | - Yichen Ding
- Centre for Environmental Life Sciences Engineering (SCELSE)
- School of Biological Sciences
- Nanyang Technological University
- Singapore
- Singapore
| | - Jing Mu
- Division of Chemistry and Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore
- Singapore
| | - Yang Liang
- Centre for Environmental Life Sciences Engineering (SCELSE)
- School of Biological Sciences
- Nanyang Technological University
- Singapore
- Singapore
| | - Bengang Xing
- Division of Chemistry and Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore
- Singapore
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87
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Zhang CJ, Cai X, Xu S, Zhan R, Jien W, Liu B. A light-up endoplasmic reticulum probe based on a rational design of red-emissive fluorogens with aggregation-induced emission. Chem Commun (Camb) 2017; 53:10792-10795. [DOI: 10.1039/c7cc05205g] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Fine-tuning the interaction between electron donors and acceptors generates a red-emissive AIEgen which was further developed into an ER targeting imaging probe for specific ER imaging with high selectivity.
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Affiliation(s)
- Chong-Jing Zhang
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
- Singapore
| | - Xiaolei Cai
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
- Singapore
| | - Shidang Xu
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
- Singapore
| | - Ruoyu Zhan
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
- Singapore
| | - Wu Jien
- Department of Chemistry
- National University of Singapore
- Singapore
- Singapore
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
- Singapore
- Institute of Materials Research and Engineering
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88
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Mao W, Xia L, Wang Y, Xie H. A Self-Immobilizing and Fluorogenic Probe for β-Lactamase Detection. Chem Asian J 2016; 11:3493-3497. [DOI: 10.1002/asia.201601344] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 10/25/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Wuyu Mao
- 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 P.R. China
| | - Lingying Xia
- 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 P.R. China
| | - Yaqun Wang
- 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 P.R. 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 P.R. China
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89
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Abstract
Tuberculosis (TB) is an airborne infectious disease caused by organisms of the Mycobacterium tuberculosis complex. Although primarily a pulmonary pathogen, M. tuberculosis can cause disease in almost any part of the body. Infection with M. tuberculosis can evolve from containment in the host, in which the bacteria are isolated within granulomas (latent TB infection), to a contagious state, in which the patient will show symptoms that can include cough, fever, night sweats and weight loss. Only active pulmonary TB is contagious. In many low-income and middle-income countries, TB continues to be a major cause of morbidity and mortality, and drug-resistant TB is a major concern in many settings. Although several new TB diagnostics have been developed, including rapid molecular tests, there is a need for simpler point-of-care tests. Treatment usually requires a prolonged course of multiple antimicrobials, stimulating efforts to develop shorter drug regimens. Although the Bacillus Calmette-Guérin (BCG) vaccine is used worldwide, mainly to prevent life-threatening TB in infants and young children, it has been ineffective in controlling the global TB epidemic. Thus, efforts are underway to develop newer vaccines with improved efficacy. New tools as well as improved programme implementation and financing are necessary to end the global TB epidemic by 2035.
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90
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Sule P, Tilvawala R, Behinaein P, Walkup GK, Cirillo JD. New directions using reporter enzyme fluorescence (REF) as a tuberculosis diagnostic platform. Tuberculosis (Edinb) 2016; 101S:S78-S82. [PMID: 27729258 DOI: 10.1016/j.tube.2016.09.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Although tuberculosis (TB) is one of the most common causes of morbidity and mortality in humans worldwide and diagnostic methods have been in place for more than 100 years, diagnosis remains a challenge. The main problems with diagnosis relate to the time needed to obtain a definitive result, difficulty in obtaining sputum, the primary clinical material used, and the ability of the causative agent, Mycobacterium tuberculosis, to cause disease in nearly any tissue within the body. In order to decrease incidence of TB, discovery of a novel interventions will be required, since current technologies have only been able to control numbers of infections, not reduce them. Diagnostic innovation is particularly needed because there are no effective pediatric or extrapulmonary TB diagnostic methods and multiple-drug resistance is only identified in less than 25% of those patients that are thought to have it. The most common diagnostic method worldwide remains acid-fast stain on sputum, with a threshold of ∼10,000 bacteria/ml that is only reached ∼5-6 months after development of symptoms. In order to obtain definitive diagnostic results earlier during the disease process, we have developed a diagnostic method designated reporter enzyme fluorescence (REF) that utilizes BlaC produced by M. tuberculosis and custom substrates to produce a specific fluorescent signal with as few as 10 bacteria/ml in clinical samples. We believe that the unique biology of the REF technique will allow it to contribute new diagnostic information that is complementary to all existing diagnostic tests as well as those currently known to be in development.
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Affiliation(s)
- Preeti Sule
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Center for Airborne Pathogens Research and Imaging, Medical Research & Education Building, 8447 State Hwy 47, Bryan, TX 77807, USA
| | - Ronak Tilvawala
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Center for Airborne Pathogens Research and Imaging, Medical Research & Education Building, 8447 State Hwy 47, Bryan, TX 77807, USA
| | - Parnia Behinaein
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Center for Airborne Pathogens Research and Imaging, Medical Research & Education Building, 8447 State Hwy 47, Bryan, TX 77807, USA
| | - Grant K Walkup
- Agios Pharmaceuticals, 88 Sydney St., Cambridge, MA 02139, USA
| | - Jeffrey D Cirillo
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Center for Airborne Pathogens Research and Imaging, Medical Research & Education Building, 8447 State Hwy 47, Bryan, TX 77807, USA.
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91
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Nicol MP, Gnanashanmugam D, Browning R, Click ES, Cuevas LE, Detjen A, Graham SM, Levin M, Makhene M, Nahid P, Perez-Velez CM, Reither K, Song R, Spiegel HML, Worrell C, Zar HJ, Walzl G. A Blueprint to Address Research Gaps in the Development of Biomarkers for Pediatric Tuberculosis. Clin Infect Dis 2016; 61Suppl 3:S164-72. [PMID: 26409279 DOI: 10.1093/cid/civ613] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Childhood tuberculosis contributes significantly to the global tuberculosis disease burden but remains challenging to diagnose due to inadequate methods of pathogen detection in paucibacillary pediatric samples and lack of a child-specific host biomarker to identify disease. Accurately diagnosing tuberculosis in children is required to improve case detection, surveillance, healthcare delivery, and effective advocacy. In May 2014, the National Institutes of Health convened a workshop including researchers in the field to delineate priorities to address this research gap. This blueprint describes the consensus from the workshop, identifies critical research steps to advance this field, and aims to catalyze efforts toward harmonization and collaboration in this area.
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Affiliation(s)
- Mark Patrick Nicol
- Division of Medical Microbiology and Institute for Infectious Diseases and Molecular Medicine, University of Cape Town and National Health Laboratory Service of South Africa
| | | | - Renee Browning
- National Institute of Allergy and Infectious Diseases, Bethesda, Maryland
| | - Eleanor S Click
- Division of Tuberculosis Elimination, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Luis E Cuevas
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, United Kingdom
| | - Anne Detjen
- International Union Against Tuberculosis and Lung Disease, Paris, France
| | - Steve M Graham
- International Union Against Tuberculosis and Lung Disease, Paris, France Centre for International Child Health, University of Melbourne, and Department of Paediatrics and Murdoch Childrens Research Institute, Royal Children's Hospital Burnet Institute, Melbourne, Australia
| | - Michael Levin
- Department of Pediatrics, Imperial College, London, United Kingdom
| | - Mamodikoe Makhene
- National Institute of Allergy and Infectious Diseases, Bethesda, Maryland
| | - Payam Nahid
- Pulmonary and Critical Care Medicine, University of California, San Francisco
| | - Carlos M Perez-Velez
- Division of Infectious Diseases, Banner-University Medical Center Phoenix, University of Arizona College of Medicine
| | - Klaus Reither
- Swiss Tropical and Public Health Institute, University of Basel, Switzerland
| | - Rinn Song
- Division of Infectious Diseases, Boston Children's Hospital Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
| | - Hans M L Spiegel
- HJF-DAIDS, a Division of The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc, Contractor to National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
| | - Carol Worrell
- National Institute of Allergy and Infectious Diseases, Bethesda, Maryland
| | - Heather J Zar
- Department of Paediatrics and Child Health, Red Cross Children's Hospital and Medical Research Council Unit on Child and Adolescent Health, University of Cape Town
| | - Gerhard Walzl
- Department of Science and Technology and National Research Foundation Centre of Excellence for Biomedical Tuberculosis Research/Medical Research Council Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa
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92
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Xu T, Liang C, Ji S, Ding D, Kong D, Wang L, Yang Z. Surface-Induced Hydrogelation for Fluorescence and Naked-Eye Detections of Enzyme Activity in Blood. Anal Chem 2016; 88:7318-23. [DOI: 10.1021/acs.analchem.6b01660] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Tengyan Xu
- State Key Laboratory of Medicinal Chemical Biology,
College of Pharmacy
and Tianjin Key Laboratory of Molecular Drug Research and ‡Key Laboratory
of Bioactive Materials, Ministry of Education, College of Life Sciences,
and Synergetic Innovation Center of Chemical Science and Engineering
(Tianjin), Nankai University, Tianjin 300071, People’s Republic of China
| | - Chunhui Liang
- State Key Laboratory of Medicinal Chemical Biology,
College of Pharmacy
and Tianjin Key Laboratory of Molecular Drug Research and ‡Key Laboratory
of Bioactive Materials, Ministry of Education, College of Life Sciences,
and Synergetic Innovation Center of Chemical Science and Engineering
(Tianjin), Nankai University, Tianjin 300071, People’s Republic of China
| | - Shenglu Ji
- State Key Laboratory of Medicinal Chemical Biology,
College of Pharmacy
and Tianjin Key Laboratory of Molecular Drug Research and ‡Key Laboratory
of Bioactive Materials, Ministry of Education, College of Life Sciences,
and Synergetic Innovation Center of Chemical Science and Engineering
(Tianjin), Nankai University, Tianjin 300071, People’s Republic of China
| | - Dan Ding
- State Key Laboratory of Medicinal Chemical Biology,
College of Pharmacy
and Tianjin Key Laboratory of Molecular Drug Research and ‡Key Laboratory
of Bioactive Materials, Ministry of Education, College of Life Sciences,
and Synergetic Innovation Center of Chemical Science and Engineering
(Tianjin), Nankai University, Tianjin 300071, People’s Republic of China
| | - Deling Kong
- State Key Laboratory of Medicinal Chemical Biology,
College of Pharmacy
and Tianjin Key Laboratory of Molecular Drug Research and ‡Key Laboratory
of Bioactive Materials, Ministry of Education, College of Life Sciences,
and Synergetic Innovation Center of Chemical Science and Engineering
(Tianjin), Nankai University, Tianjin 300071, People’s Republic of China
| | - Ling Wang
- State Key Laboratory of Medicinal Chemical Biology,
College of Pharmacy
and Tianjin Key Laboratory of Molecular Drug Research and ‡Key Laboratory
of Bioactive Materials, Ministry of Education, College of Life Sciences,
and Synergetic Innovation Center of Chemical Science and Engineering
(Tianjin), Nankai University, Tianjin 300071, People’s Republic of China
| | - Zhimou Yang
- State Key Laboratory of Medicinal Chemical Biology,
College of Pharmacy
and Tianjin Key Laboratory of Molecular Drug Research and ‡Key Laboratory
of Bioactive Materials, Ministry of Education, College of Life Sciences,
and Synergetic Innovation Center of Chemical Science and Engineering
(Tianjin), Nankai University, Tianjin 300071, People’s Republic of China
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93
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Tay A, Pavesi A, Yazdi SR, Lim CT, Warkiani ME. Advances in microfluidics in combating infectious diseases. Biotechnol Adv 2016; 34:404-421. [PMID: 26854743 PMCID: PMC7125941 DOI: 10.1016/j.biotechadv.2016.02.002] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 02/03/2016] [Accepted: 02/04/2016] [Indexed: 12/11/2022]
Abstract
One of the important pursuits in science and engineering research today is to develop low-cost and user-friendly technologies to improve the health of people. Over the past decade, research efforts in microfluidics have been made to develop methods that can facilitate low-cost diagnosis of infectious diseases, especially in resource-poor settings. Here, we provide an overview of the recent advances in microfluidic devices for point-of-care (POC) diagnostics for infectious diseases and emphasis is placed on malaria, sepsis and AIDS/HIV. Other infectious diseases such as SARS, tuberculosis, and dengue are also briefly discussed. These infectious diseases are chosen as they contribute the most to disability-adjusted life-years (DALYs) lost according to the World Health Organization (WHO). The current state of research in this area is evaluated and projection toward future applications and accompanying challenges are also discussed.
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Affiliation(s)
- Andy Tay
- BioSystems and Micromechanics (BioSyM) IRG, Singapore-MIT Alliance for Research and Technology (SMART) Centre, Singapore 138602, Singapore; Department of Biomedical Engineering, National University of Singapore, Singapore 117575, Singapore; Department of Bioengineering, University of California Los Angeles, CA 90025, United States
| | - Andrea Pavesi
- BioSystems and Micromechanics (BioSyM) IRG, Singapore-MIT Alliance for Research and Technology (SMART) Centre, Singapore 138602, Singapore
| | - Saeed Rismani Yazdi
- BioSystems and Micromechanics (BioSyM) IRG, Singapore-MIT Alliance for Research and Technology (SMART) Centre, Singapore 138602, Singapore; Polytechnic University of Milan, Milan 20133, Italy
| | - Chwee Teck Lim
- BioSystems and Micromechanics (BioSyM) IRG, Singapore-MIT Alliance for Research and Technology (SMART) Centre, Singapore 138602, Singapore; Mechanobiology Institute, National University of Singapore, Singapore 117411, Singapore; Department of Biomedical Engineering, National University of Singapore, Singapore 117575, Singapore
| | - Majid Ebrahimi Warkiani
- BioSystems and Micromechanics (BioSyM) IRG, Singapore-MIT Alliance for Research and Technology (SMART) Centre, Singapore 138602, Singapore; School of Mechanical and Manufacturing Engineering, Australian Centre for NanoMedicine, University of New South Wales, Sydney, NSW 2052, Australia.
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94
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A chemiluminescent platform for smartphone monitoring of H 2O 2 in human exhaled breath condensates. Methods 2016; 109:123-130. [PMID: 27233749 DOI: 10.1016/j.ymeth.2016.05.017] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Revised: 05/20/2016] [Accepted: 05/22/2016] [Indexed: 11/22/2022] Open
Abstract
Noninvasive measurement of oxidative markers in clinical samples has the potential to rapidly provide information for disease management, but is limited by the need for expensive analytical instrumentation that precludes home monitoring or point-of-care applications. We have developed a simple to use diagnostic platform for airway hydrogen peroxide (H2O2) that combines optimized reaction-based chemiluminescent designs with an inexpensive home-built darkbox and readily available smartphone cameras. Specialized photography software applications and analysis of pixel intensity enables quantification of sample concentrations. Using this platform, sample H2O2 concentrations as low as 264nM can be detected. The platform has been used to measure H2O2 in the exhaled breath condensates of human subjects, showing good agreement with the standard Amplex Red assay.
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95
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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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96
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Shapiro AB. Investigation of β-lactam antibacterial drugs, β-lactamases, and penicillin-binding proteins with fluorescence polarization and anisotropy: a review. Methods Appl Fluoresc 2016; 4:024002. [DOI: 10.1088/2050-6120/4/2/024002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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97
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Spacer-free BODIPY fluorogens in antimicrobial peptides for direct imaging of fungal infection in human tissue. Nat Commun 2016; 7:10940. [PMID: 26956772 PMCID: PMC4786873 DOI: 10.1038/ncomms10940] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 02/03/2016] [Indexed: 12/12/2022] Open
Abstract
Fluorescent antimicrobial peptides are promising structures for in situ, real-time imaging of fungal infection. Here we report a fluorogenic probe to image Aspergillus fumigatus directly in human pulmonary tissue. We have developed a fluorogenic Trp-BODIPY amino acid with a spacer-free C-C linkage between Trp and a BODIPY fluorogen, which shows remarkable fluorescence enhancement in hydrophobic microenvironments. The incorporation of our fluorogenic amino acid in short antimicrobial peptides does not impair their selectivity for fungal cells, and enables rapid and direct fungal imaging without any washing steps. We have optimized the stability of our probes in human samples to perform multi-photon imaging of A. fumigatus in ex vivo human tissue. The incorporation of our unique BODIPY fluorogen in biologically relevant peptides will accelerate the development of novel imaging probes with high sensitivity and specificity.
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98
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A fluorogenic substrate of beta-lactamases and its potential as a probe to detect the bacteria resistant to the third-generation oxyimino-cephalosporins. Biosens Bioelectron 2016; 77:1026-31. [DOI: 10.1016/j.bios.2015.10.081] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Revised: 10/24/2015] [Accepted: 10/28/2015] [Indexed: 11/19/2022]
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99
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Zhang H, Wang K, Xuan X, Lv Q, Nie Y, Guo H. Cancer cell-targeted two-photon fluorescence probe for the real-time ratiometric imaging of DNA damage. Chem Commun (Camb) 2016; 52:6308-11. [DOI: 10.1039/c6cc02290a] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A sequential ICT fluorescence probe (ANF–Glu) was successfully utilized to spatially and temporally image DNA damage in cancer cells.
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Affiliation(s)
- Hua Zhang
- Henan Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Key Laboratory of Green Chemical Media and Reactions
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering Institution
| | - Kui Wang
- Henan Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Key Laboratory of Green Chemical Media and Reactions
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering Institution
| | - Xiaopeng Xuan
- Henan Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Key Laboratory of Green Chemical Media and Reactions
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering Institution
| | - Qingzhang Lv
- Henan Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Key Laboratory of Green Chemical Media and Reactions
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering Institution
| | - Yamin Nie
- Henan Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Key Laboratory of Green Chemical Media and Reactions
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering Institution
| | - Haiming Guo
- Henan Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Key Laboratory of Green Chemical Media and Reactions
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering Institution
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100
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