1
|
Lochenie C, Duncan S, Zhou Y, Fingerhut L, Kiang A, Benson S, Jiang G, Liu X, Mills B, Vendrell M. Photosensitizer-Amplified Antimicrobial Materials for Broad-Spectrum Ablation of Resistant Pathogens in Ocular Infections. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2404107. [PMID: 38762778 DOI: 10.1002/adma.202404107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 05/17/2024] [Indexed: 05/20/2024]
Abstract
The emergence of multidrug resistant (MDR) pathogens and the scarcity of new potent antibiotics and antifungals are one of the biggest threats to human health. Antimicrobial photodynamic therapy (aPDT) combines light and photosensitizers to kill drug-resistant pathogens; however, there are limited materials that can effectively ablate different classes of infective pathogens. In the present work, a new class of benzodiazole-paired materials is designed as highly potent PDT agents with broad-spectrum antimicrobial activity upon illumination with nontoxic light. The results mechanistically demonstrate that the energy transfer and electron transfer between nonphotosensitive and photosensitive benzodiazole moieties embedded within pathogen-binding peptide sequences result in increased singlet oxygen generation and enhanced phototoxicity. Chemical optimization renders PEP3 as a novel PDT agent with remarkable activity against MDR bacteria and fungi as well as pathogens at different stages of development (e.g., biofilms, spores, and fungal hyphae), which also prove effective in an ex vivo porcine model of microbial keratitis. The chemical modularity of this strategy and its general compatibility with peptide-based targeting agents will accelerate the design of highly photosensitive materials for antimicrobial PDT.
Collapse
Affiliation(s)
- Charles Lochenie
- Centre for Inflammation Research, University of Edinburgh, 4-5 Little France Drive, Edinburgh, EH16 4UU, UK
- IRR Chemistry Hub, Institute for Regeneration and Repair, 4-5 Little France Drive, Edinburgh, EH16 4UU, UK
| | - Sheelagh Duncan
- Centre for Inflammation Research, University of Edinburgh, 4-5 Little France Drive, Edinburgh, EH16 4UU, UK
| | - Yanzi Zhou
- Centre for Inflammation Research, University of Edinburgh, 4-5 Little France Drive, Edinburgh, EH16 4UU, UK
- IRR Chemistry Hub, Institute for Regeneration and Repair, 4-5 Little France Drive, Edinburgh, EH16 4UU, UK
| | - Leonie Fingerhut
- Centre for Inflammation Research, University of Edinburgh, 4-5 Little France Drive, Edinburgh, EH16 4UU, UK
| | - Alex Kiang
- Centre for Inflammation Research, University of Edinburgh, 4-5 Little France Drive, Edinburgh, EH16 4UU, UK
| | - Sam Benson
- Centre for Inflammation Research, University of Edinburgh, 4-5 Little France Drive, Edinburgh, EH16 4UU, UK
- IRR Chemistry Hub, Institute for Regeneration and Repair, 4-5 Little France Drive, Edinburgh, EH16 4UU, UK
| | - Guanyu Jiang
- Fluorescence Research Group, Singapore University of Technology and Design, 8 Somapah Road, Singapore, 487372, Singapore
| | - Xiaogang Liu
- Fluorescence Research Group, Singapore University of Technology and Design, 8 Somapah Road, Singapore, 487372, Singapore
| | - Bethany Mills
- Centre for Inflammation Research, University of Edinburgh, 4-5 Little France Drive, Edinburgh, EH16 4UU, UK
| | - Marc Vendrell
- Centre for Inflammation Research, University of Edinburgh, 4-5 Little France Drive, Edinburgh, EH16 4UU, UK
- IRR Chemistry Hub, Institute for Regeneration and Repair, 4-5 Little France Drive, Edinburgh, EH16 4UU, UK
| |
Collapse
|
2
|
Shen Z, Pan Y, Yan D, Wang D, Tang BZ. AIEgen-Based Nanomaterials for Bacterial Imaging and Antimicrobial Applications: Recent Advances and Perspectives. Molecules 2023; 28:2863. [PMID: 36985835 PMCID: PMC10057855 DOI: 10.3390/molecules28062863] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/14/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
Microbial infections have always been a thorny problem. Multi-drug resistant (MDR) bacterial infections rendered the antibiotics commonly used in clinical treatment helpless. Nanomaterials based on aggregation-induced emission luminogens (AIEgens) recently made great progress in the fight against microbial infections. As a family of photosensitive antimicrobial materials, AIEgens enable the fluorescent tracing of microorganisms and the production of reactive oxygen (ROS) and/or heat upon light irradiation for photodynamic and photothermal treatments targeting microorganisms. The novel nanomaterials constructed by combining polymers, antibiotics, metal complexes, peptides, and other materials retain the excellent antimicrobial properties of AIEgens while giving other materials excellent properties, further enhancing the antimicrobial effect of the material. This paper reviews the research progress of AIEgen-based nanomaterials in the field of antimicrobial activity, focusing on the materials' preparation and their related antimicrobial strategies. Finally, it concludes with an outlook on some of the problems and challenges still facing the field.
Collapse
Affiliation(s)
- Zipeng Shen
- Center for AIE Research, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China
| | - Yinzhen Pan
- Center for AIE Research, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China
| | - Dingyuan Yan
- Center for AIE Research, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China
| | - Dong Wang
- Center for AIE Research, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China
| | - Ben Zhong Tang
- Shenzhen Institute of Molecular Aggregate Science and Engineering, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, China
| |
Collapse
|
3
|
Liu F, Chen S, Zou Y, Jiao Y, Tang Y. A simple and efficient fluorescent labeling method in Staphylococcus aureus for real-time tracking of invasive bacteria. Front Microbiol 2023; 14:1128638. [PMID: 36846783 PMCID: PMC9950555 DOI: 10.3389/fmicb.2023.1128638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 01/24/2023] [Indexed: 02/12/2023] Open
Abstract
Bacterial fluorescent labeling is a powerful tool for the diagnosis and treatment of bacterial infections. Here, we present a simple and efficient labeling strategy for Staphylococcus aureus. Intracellular labeling of bacteria was achieved by heat shock using Cyanine 5.5 (Cy5.5) near-infrared-I dyes in S. aureus (Cy5.5@S. aureus). Several key factors, such as Cy5.5 concentration and labeling time, were systematically evaluated. Further, the cytotoxicity of Cy5.5 and the stability of Cy5.5@S. aureus was evaluated by flow cytometry, inverted fluorescence microscopy, and transmission electron microscopy. In addition, Cy5.5@S. aureus were used to explore the phagocytic behavior of RAW264.7 macrophages. These results proved that Cy5.5@S. aureus had a uniform fluorescence intensity and high luminance; additionally, our method had no significant adverse effects on S. aureus compared to unlabeled S. aureus infections. Our method provides researchers with a useful option for analyzing the behavior of S. aureus as an infectious agent. This technique can be broadly applied to study host cell-bacteria interactions at the molecular level, and to in vivo tracing of bacterial infections.
Collapse
Affiliation(s)
- Fei Liu
- Naval Medical Center, Naval Medical University, Shanghai, China
| | - Sijie Chen
- Department of Nursing, The 940th Hospital of Joint Logistic Support Force of People’s Liberation Army (PLA), Lanzhou, China
| | - Yingxin Zou
- Naval Medical Center, Naval Medical University, Shanghai, China
| | - Yong Jiao
- Naval Medical Center, Naval Medical University, Shanghai, China
| | - Ying Tang
- Naval Medical Center, Naval Medical University, Shanghai, China,*Correspondence: Ying Tang,
| |
Collapse
|
4
|
Tian S, Huang H, Zhang Y, Shi H, Dong Y, Zhang W, Bai C. The role of confocal laser endomicroscopy in pulmonary medicine. Eur Respir Rev 2023; 32:32/167/220185. [PMID: 36697210 PMCID: PMC9879334 DOI: 10.1183/16000617.0185-2022] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 11/21/2022] [Indexed: 01/26/2023] Open
Abstract
Accurate diagnosis and subsequent therapeutic options in pulmonary diseases mainly rely on imaging methods and histological assessment. However, imaging examinations are hampered by the limited spatial resolution of images and most procedures that are related to histological assessment are invasive with associated complications. As a result, a high-resolution imaging technology - confocal laser endomicroscopy (CLE), which is at the forefront and enables real-time microscopic visualisation of the morphologies and architectures of tissues or cells - has been developed to resolve the clinical dilemma pertaining to current techniques. The current evidence has shown that CLE has the potential to facilitate advanced diagnostic capabilities, to monitor and to aid the tailored treatment regime for patients with pulmonary diseases, as well as to expand the horizon for unravelling the mechanism and therapeutic targets of pulmonary diseases. In the future, if CLE can be combined with artificial intelligence, early, rapid and accurate diagnosis will be achieved through identifying the images automatically. As promising as this technique may be, further investigations are required before it can enter routine clinical practice.
Collapse
Affiliation(s)
- Sen Tian
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Naval Medical University, Shanghai, China,These authors contributed equally to this work
| | - Haidong Huang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Naval Medical University, Shanghai, China,These authors contributed equally to this work
| | - Yifei Zhang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Naval Medical University, Shanghai, China,Department of Biomedical Engineering, University of Shanghai for Science and Technology, Shanghai, China,These authors contributed equally to this work
| | - Hui Shi
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Naval Medical University, Shanghai, China
| | - Yuchao Dong
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Naval Medical University, Shanghai, China
| | - Wei Zhang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Naval Medical University, Shanghai, China
| | - Chong Bai
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Naval Medical University, Shanghai, China,Department of Biomedical Engineering, University of Shanghai for Science and Technology, Shanghai, China,Corresponding author: Chong Bai ()
| |
Collapse
|
5
|
Welling MM, Warbroek K, Khurshid C, van Oosterom MN, Rietbergen DDD, de Boer MGJ, Nelissen RGHH, van Leeuwen FWB, Pijls BG, Buckle T. A radio- and fluorescently labelled tracer for imaging and quantification of bacterial infection on orthopaedic prostheses : a proof of principle study. Bone Joint Res 2023; 12:72-79. [PMID: 36649933 PMCID: PMC9872039 DOI: 10.1302/2046-3758.121.bjr-2022-0216.r1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
AIMS Arthroplasty surgery of the knee and hip is performed in two to three million patients annually. Periprosthetic joint infections occur in 4% of these patients. Debridement, antibiotics, and implant retention (DAIR) surgery aimed at cleaning the infected prosthesis often fails, subsequently requiring invasive revision of the complete prosthetic reconstruction. Infection-specific imaging may help to guide DAIR. In this study, we evaluated a bacteria-specific hybrid tracer (99mTc-UBI29-41-Cy5) and its ability to visualize the bacterial load on femoral implants using clinical-grade image guidance methods. METHODS 99mTc-UBI29-41-Cy5 specificity for Stapylococcus aureus was assessed in vitro using fluorescence confocal imaging. Topical administration was used to highlight the location of S. aureus cultured on femoral prostheses using fluorescence imaging and freehand single photon emission CT (fhSPECT) scans. Gamma counting and fhSPECT were used to quantify the bacterial load and monitor cleaning with chlorhexidine. Microbiological culturing helped to relate the imaging findings with the number of (remaining) bacteria. RESULTS Bacteria could be effectively stained in vitro and on prostheses, irrespective of the presence of biofilm. Infected prostheses revealed bacterial presence on the transition zone between the head and neck, and in the screw hole. Qualitative 2D fluorescence images could be complemented with quantitative 3D fhSPECT scans. Despite thorough chlorhexidine treatments, 28% to 44% of the signal remained present in the locations of the infection that were identified using imaging, which included 500 to 2,000 viable bacteria. CONCLUSION The hybrid tracer 99mTc-UBI29-41-Cy5 allowed effective bacterial staining. Qualitative real-time fluorescence guidance could be effectively combined with nuclear imaging that enables quantitative monitoring of the effectiveness of cleaning strategies.Cite this article: Bone Joint Res 2023;12(1):72-79.
Collapse
Affiliation(s)
- Mick M. Welling
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, Netherlands
| | - Kim Warbroek
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, Netherlands
| | - Chrow Khurshid
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, Netherlands
| | - Matthias N. van Oosterom
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, Netherlands
| | - Daphne D. D. Rietbergen
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, Netherlands,Department of Radiology, Section Nuclear Medicine, Leiden University Medical Center, Leiden, Netherlands
| | - Mark G. J. de Boer
- Departments of Internal Medicine and Infectious Diseases, Leiden University Medical Center, Leiden, Netherlands
| | | | - Fijs W. B. van Leeuwen
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, Netherlands
| | - Bart G. Pijls
- Department of Orthopedics, Leiden University Medical Center, Leiden, Netherlands
| | - Tessa Buckle
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, Netherlands, Tessa Buckle. E-mail:
| |
Collapse
|
6
|
Marjanovic-Painter B, Kleynhans J, Zeevaart JR, Rohwer E, Ebenhan T. A decade of ubiquicidin development for PET imaging of infection: A systematic review. Nucl Med Biol 2023; 116-117:108307. [PMID: 36435145 DOI: 10.1016/j.nucmedbio.2022.11.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/25/2022] [Accepted: 11/07/2022] [Indexed: 11/15/2022]
Abstract
BACKGROUND Ubiquicidin is a peptide fragment with selective binding to negatively charged bacterial cell membranes. Besides its earlier labelling with gamma emitting radionuclides, it has been labelled with Positron Emission Tomography (PET) radionuclides in the last decade for imaging infection and distinguishing infectious disease from sterile inflammation. This systematic review aims to evaluate the technology readiness level of PET based ubiquicidin radiopharmaceuticals. METHODS Two independent researchers reviewed all articles and abstracts pertaining ubiquicidin and PET imaging that are currently available. Scopus, Google Scholar and PubMed/Medline were used in the search. Upon completion of the literature search all articles and abstracts were evaluated and duplicates were excluded. All non-PET articles as well as review articles without new data were deemed ineligible. RESULTS From a total of 17 papers and 10 abstracts the studies were grouped into development, preclinical and clinical studies. Development was published in 15/17 (88%) publications and 6/10 (60%) abstracts, preclinical applications in 9/17 (53%) publications and 1/10 (10%) of abstracts. Finally, clinical studies made up 6/17 (35%) of full publications and 4/10 (40%) of the available abstracts. Development results were the most abundant. All the findings in the different areas of development of ubiquicidin as PET radiopharmaceutical are summarized in this paper. CONCLUSION Labelling procedures are generally uncomplicated and relatively fast and there are indications of adequate product stability. The production of PET radiopharmaceuticals based on UBI will therefore not be a barrier for clinical introduction of this technology. Systematization and unification of criteria for preclinical imaging and larger clinical trials are needed to ensure the translation of this radiopharmaceutical into the clinic. Therefore a conclusion with regards to the clinical relevance of ubiquicidin based PET is not yet possible.
Collapse
Affiliation(s)
| | - Janke Kleynhans
- Nuclear Medicine Research Infrastructure NPC, Pretoria, South Africa
| | - Jan Rijn Zeevaart
- Radiochemistry, The South African Nuclear Energy Corporation, Pelindaba, South Africa; Nuclear Medicine Research Infrastructure NPC, Pretoria, South Africa
| | - Egmont Rohwer
- Department of Chemistry, University of Pretoria, Pretoria, South Africa
| | - Thomas Ebenhan
- Radiochemistry, The South African Nuclear Energy Corporation, Pelindaba, South Africa; Department of Nuclear Medicine, University of Pretoria, Pretoria, South Africa; Nuclear Medicine Research Infrastructure NPC, Pretoria, South Africa.
| |
Collapse
|
7
|
Roy SK, Purkait A, Shome R, Das S, Das D, Ghosh SS, Jana CK. Proline selective labeling via on-site construction of naphthoxazole (NapOx). Chem Commun (Camb) 2022; 58:5909-5912. [PMID: 35475487 DOI: 10.1039/d2cc01268e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chemoselective construction of naphthoxazoles (NapOx) via a three-component annulation reaction enables proline selective labeling of peptides in solution or in solid-phase synthesis. The fluorogenic peptides possess low cytotoxicity, efficient cell membrane permeability and excellent bioimaging potential for biomedical applications.
Collapse
Affiliation(s)
- Subhra Kanti Roy
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, India.
| | - Anisha Purkait
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, India.
| | - Rajib Shome
- Department of Biosciences and Engineering, Indian Institute of Technology Guwahati, 781039, India
| | - Saurav Das
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, India.
| | - Debapratim Das
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, India.
| | - Siddhartha Sankar Ghosh
- Department of Biosciences and Engineering, Indian Institute of Technology Guwahati, 781039, India
| | - Chandan K Jana
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, India.
| |
Collapse
|
8
|
Bacteria eat nanoprobes for aggregation-enhanced imaging and killing diverse microorganisms. Nat Commun 2022; 13:1255. [PMID: 35273187 PMCID: PMC8913676 DOI: 10.1038/s41467-022-28920-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 02/17/2022] [Indexed: 12/13/2022] Open
Abstract
Currently optical-based techniques for in vivo microbial population imaging are limited by low imaging depth and highly light-scattering tissue; and moreover, are generally effective against only one specific group of bacteria. Here, we introduce an imaging and therapy strategy, in which different bacteria actively eat the glucose polymer (GP)-modified gold nanoparticles through ATP-binding cassette (ABC) transporter pathway, followed by laser irradiation-mediated aggregation in the bacterial cells. As a result, the aggregates display ~15.2-fold enhancement in photoacoustic signals and ~3.0-fold enhancement in antibacterial rate compared with non-aggregated counterparts. Significantly, the developed strategy allows ultrasensitive imaging of bacteria in vivo as low ~105 colony-forming unit (CFU), which is around two orders of magnitude lower than most optical contrast agents. We further demonstrate the developed strategy enables the detection of ~107 CFU bacteria residing within tumour or gut. This technique enables visualization and treatment of diverse bacteria, setting the crucial step forward the study of microbial ecosystem. The authors demonstrate a strategy for bacterial uptake of gold nanoparticles modified with glucose polymer. The particles aggregate in the bacterial cells upon laser irradiation, resulting in enhanced photoacoustic signal and antibacterial activity, enabling sensitive imaging of bacteria in vivo.
Collapse
|
9
|
Islam MA, Karim A, Ethiraj B, Raihan T, Kadier A. Antimicrobial peptides: Promising alternatives over conventional capture ligands for biosensor-based detection of pathogenic bacteria. Biotechnol Adv 2022; 55:107901. [PMID: 34974156 DOI: 10.1016/j.biotechadv.2021.107901] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 11/19/2021] [Accepted: 12/25/2021] [Indexed: 02/07/2023]
Abstract
The detection of pathogenic bacteria using biosensing techniques could be a potential alternative to traditional culture based methods. However, the low specificity and sensitivity of conventional biosensors, critically related to the choice of bio-recognition elements, limit their practical applicability. Mammalian antibodies have been widely investigated as biorecognition ligands due to high specificity and technological advancement in antibody production. However, antibody-based biosensors are not considered as an efficient approach due to the batch-to-batch inconsistencies as well as low stability. In recent years, antimicrobial peptides (AMPs) have been increasingly investigated as ligands as they have demonstrated high stability and possessed multiple sites for capturing bacteria. The conjugation of chemo-selective groups with AMPs has allowed effective immobilization of peptides on biosensor surface. However, the specificity of AMPs is a major concern for consideration as an efficient ligand. In this article, we have reviewed the advances and concerns, particularly the selectivity of AMPs for specific detection of pathogenic bacteria. This review also focuses the state-of-the-art mechanisms, challenges and prospects for designing potential AMP conjugated biosensors. The application of AMP in different biosensing transducers such as electrochemical, optical and piezoelectric varieties has been widely discussed. We argue that this review would provide insights to design and construct AMP conjugated biosensors for the pathogenic bacteria detection.
Collapse
Affiliation(s)
- M Amirul Islam
- Interdisciplinary Institute for Technological Innovation (3IT), CNRS UMI-3463, Laboratory for Quantum Semiconductors and Photon-based BioNanotechnology, Department of Electrical and Computer Engineering, Université de Sherbrooke, 3000, boul. de l'Université, Sherbrooke, Québec J1K 0A5, Canada.
| | - Ahasanul Karim
- Department of Soil Sciences and Agri-Food Engineering, Université Laval, Quebec, QC G1V 0A6, Canada
| | - Baranitharan Ethiraj
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai, India
| | - Topu Raihan
- Deapartment of Genetic Engineering and Biotechnology, Shahjalal, University of Science and Technology, Sylhet 3114, Bangladesh
| | - Abudukeremu Kadier
- Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics and Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China
| |
Collapse
|
10
|
Thakur R, Suri CR, Kaur IP, Rishi P. Review. Crit Rev Ther Drug Carrier Syst 2022; 40:49-100. [DOI: 10.1615/critrevtherdrugcarriersyst.2022040322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
11
|
Reimler J, Studer A. Visible-Light Mediated Tryptophan Modification in Oligopeptides Employing Acylsilanes. Chemistry 2021; 27:15392-15395. [PMID: 34498756 DOI: 10.1002/chem.202102749] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Indexed: 12/25/2022]
Abstract
A method for the selective tryptophan modification and labelling of tryptophan-containing peptides is described. Photoirradiation of acylsilanes generates reactive siloxycarbenes which undergo H-N-insertion into the indole moiety of tryptophan to give stable silyl protected hemiaminals. This method is successfully applied to chemically modify various tryptophan containing oligopeptides. The method enables the selective introduction of alkynes to peptides that are eligible for further alkyne-azide click chemistry. In addition, the dansyl fluorophore can be conjugated to a peptide using this approach.
Collapse
Affiliation(s)
- Jannik Reimler
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| |
Collapse
|
12
|
Tegge W, Guerra G, Höltke A, Schiller L, Beutling U, Harmrolfs K, Gröbe L, Wullenkord H, Xu C, Weich H, Brönstrup M. Selective Bacterial Targeting and Infection-Triggered Release of Antibiotic Colistin Conjugates. Angew Chem Int Ed Engl 2021; 60:17989-17997. [PMID: 34097810 PMCID: PMC8456958 DOI: 10.1002/anie.202104921] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/28/2021] [Indexed: 12/18/2022]
Abstract
In order to render potent, but toxic antibiotics more selective, we have explored a novel conjugation strategy that includes drug accumulation followed by infection-triggered release of the drug. Bacterial targeting was achieved using a modified fragment of the human antimicrobial peptide ubiquicidin, as demonstrated by fluorophore-tagged variants. To limit the release of the effector colistin only to infection-related situations, we introduced a linker that was cleaved by neutrophil elastase (NE), an enzyme secreted by neutrophil granulocytes at infection sites. The linker carried an optimized sequence of amino acids that was required to assure sufficient cleavage efficiency. The antibacterial activity of five regioisomeric conjugates prepared by total synthesis was masked, but was released upon exposure to recombinant NE when the linker was attached to amino acids at the 1- or the 3-position of colistin. A proof-of-concept was achieved in co-cultures of primary human neutrophils and Escherichia coli that induced the secretion of NE, the release of free colistin, and an antibacterial efficacy that was equal to that of free colistin.
Collapse
Affiliation(s)
- Werner Tegge
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Giulia Guerra
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Alexander Höltke
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Lauritz Schiller
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Ulrike Beutling
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Kirsten Harmrolfs
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Lothar Gröbe
- Flow Cytometry and Cell Sorting PlatformHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Hannah Wullenkord
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Chunfa Xu
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Herbert Weich
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
| | - Mark Brönstrup
- Department of Chemical BiologyHelmholtz Centre for Infection ResearchInhoffenstrasse 738124BraunschweigGermany
- German Center for Infection Research (DZIF), SiteHannover-BraunschweigGermany
- Center of Biomolecular Drug Research (BMWZ)Leibniz Universität30167HannoverGermany
| |
Collapse
|
13
|
Tegge W, Guerra G, Höltke A, Schiller L, Beutling U, Harmrolfs K, Gröbe L, Wullenkord H, Xu C, Weich H, Brönstrup M. Zielgerichtete bakterielle Lokalisation und infektionsinduzierte Freisetzung von antibiotischen Colistin‐Konjugaten. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Werner Tegge
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Giulia Guerra
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Alexander Höltke
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Lauritz Schiller
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Ulrike Beutling
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Kirsten Harmrolfs
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Lothar Gröbe
- Flow Cytometry and Cell Sorting Platform Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Hannah Wullenkord
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Chunfa Xu
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Herbert Weich
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Mark Brönstrup
- Abteilung für Chemische Biologie Helmholtz-Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
- Deutsches Zentrum für Infektionsforschung (DZIF), Standort Hannover-Braunschweig Deutschland
- Biomolekulares Wirkstoffzentrum (BMWZ) Leibniz Universität 30167 Hannover Deutschland
| |
Collapse
|
14
|
Jiang C, Huang H, Kang X, Yang L, Xi Z, Sun H, Pluth MD, Yi L. NBD-based synthetic probes for sensing small molecules and proteins: design, sensing mechanisms and biological applications. Chem Soc Rev 2021; 50:7436-7495. [PMID: 34075930 PMCID: PMC8763210 DOI: 10.1039/d0cs01096k] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Compounds with a nitrobenzoxadiazole (NBD) skeleton exhibit prominent useful properties including environmental sensitivity, high reactivity toward amines and biothiols (including H2S) accompanied by distinct colorimetric and fluorescent changes, fluorescence-quenching ability, and small size, all of which facilitate biomolecular sensing and self-assembly. Amines are important biological nucleophiles, and the unique activity of NBD ethers with amines has allowed for site-specific protein labelling and for the detection of enzyme activities. Both H2S and biothiols are involved in a wide range of physiological processes in mammals, and misregulation of these small molecules is associated with numerous diseases including cancers. In this review, we focus on NBD-based synthetic probes as advanced chemical tools for biomolecular sensing. Specifically, we discuss the sensing mechanisms and selectivity of the probes, the design strategies for multi-reactable multi-quenching probes, and the associated biological applications of these important constructs. We also highlight self-assembled NBD-based probes and outline future directions for NBD-based chemosensors. We hope that this comprehensive review will facilitate the development of future probes for investigating and understanding different biological processes and aid the development of potential theranostic agents.
Collapse
Affiliation(s)
- Chenyang Jiang
- State Key Laboratory of Organic-Inorganic Composites and Beijing Key Lab of Bioprocess, Beijing University of Chemical Technology (BUCT), Beijing 100029, China.
| | - Haojie Huang
- State Key Laboratory of Organic-Inorganic Composites and Beijing Key Lab of Bioprocess, Beijing University of Chemical Technology (BUCT), Beijing 100029, China.
| | - Xueying Kang
- State Key Laboratory of Organic-Inorganic Composites and Beijing Key Lab of Bioprocess, Beijing University of Chemical Technology (BUCT), Beijing 100029, China.
| | - Liu Yang
- Department of Chemistry and Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, China.
| | - Zhen Xi
- State Key Laboratory of Elemento-Organic Chemistry and Department of Chemical Biology, College of Chemistry, National Pesticide Engineering Research Center, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China.
| | - Hongyan Sun
- Department of Chemistry and Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, China. and Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute of City University of Hong Kong, Shenzhen 518057, China
| | - Michael D Pluth
- Department of Chemistry and Biochemistry, Materials Science Institute, Knight Campus for Accelerating Scientific Impact, Institute of Molecular Biology, University of Oregon, Eugene, OR 97403, USA.
| | - Long Yi
- State Key Laboratory of Organic-Inorganic Composites and Beijing Key Lab of Bioprocess, Beijing University of Chemical Technology (BUCT), Beijing 100029, China.
| |
Collapse
|
15
|
Wang Z, Cong TD, Zhong W, Lau JW, Kwek G, Chan-Park MB, Xing B. Cyanine-Dyad Molecular Probe for the Simultaneous Profiling of the Evolution of Multiple Radical Species During Bacterial Infections. Angew Chem Int Ed Engl 2021; 60:16900-16905. [PMID: 34018295 DOI: 10.1002/anie.202104100] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/12/2021] [Indexed: 12/16/2022]
Abstract
Real-time monitoring of the evolution of bacterial infection-associated multiple radical species is critical to accurately profile the pathogenesis and host-defense mechanisms. Here, we present a unique dual wavelength near-infrared (NIR) cyanine-dyad molecular probe (HCy5-Cy7) for simultaneous monitoring of reactive oxygen and nitrogen species (RONS) variations both in vitro and in vivo. HCy5-Cy7 specifically turns on its fluorescence at 660 nm via superoxide or hydroxyl radical (O2 .- , . OH)-mediated oxidation of reduced HCy5 moiety to Cy5, while peroxynitrite or hypochlorous species (ONOO- , ClO- )-induced Cy7 structural degradation causes the emission turn-off at 800 nm. Such multispectral but reverse signal responses allow multiplex manifestation of in situ oxidative and nitrosative stress events during the pathogenic and defensive processes in both bacteria-infected macrophage cells and living mice. Most importantly, this study may also provide new perspectives for understanding the bacterial pathogenesis and advancing the precision medicine against infectious diseases.
Collapse
Affiliation(s)
- Zhimin Wang
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 21 Nanyang link, 637371, Singapore, Singapore
| | - Thang Do Cong
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 21 Nanyang link, 637371, Singapore, Singapore
| | - Wenbin Zhong
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore, Singapore
| | - Jun Wei Lau
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 21 Nanyang link, 637371, Singapore, Singapore
| | - Germain Kwek
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 21 Nanyang link, 637371, Singapore, Singapore
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore, Singapore
| | - Bengang Xing
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 21 Nanyang link, 637371, Singapore, Singapore.,School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, 637459, Singapore, Singapore
| |
Collapse
|
16
|
Wang Z, Cong TD, Zhong W, Lau JW, Kwek G, Chan‐Park MB, Xing B. Cyanine‐Dyad Molecular Probe for the Simultaneous Profiling of the Evolution of Multiple Radical Species During Bacterial Infections. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Zhimin Wang
- Division of Chemistry and Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University 21 Nanyang link 637371 Singapore Singapore
| | - Thang Do Cong
- Division of Chemistry and Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University 21 Nanyang link 637371 Singapore Singapore
| | - Wenbin Zhong
- School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive 637459 Singapore Singapore
| | - Jun Wei Lau
- Division of Chemistry and Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University 21 Nanyang link 637371 Singapore Singapore
| | - Germain Kwek
- Division of Chemistry and Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University 21 Nanyang link 637371 Singapore Singapore
| | - Mary B. Chan‐Park
- School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive 637459 Singapore Singapore
| | - Bengang Xing
- Division of Chemistry and Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University 21 Nanyang link 637371 Singapore Singapore
- School of Chemical and Biomedical Engineering Nanyang Technological University 70 Nanyang Drive 637459 Singapore Singapore
| |
Collapse
|
17
|
Baibek A, Üçüncü M, Short B, Ramage G, Lilienkampf A, Bradley M. Dyeing fungi: amphotericin B based fluorescent probes for multiplexed imaging. Chem Commun (Camb) 2021; 57:1899-1902. [PMID: 33491716 DOI: 10.1039/d0cc08177a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The clinically used antifungal polyene amphotericin B was conjugated, via the mycosamine and the aglycon moieties, to fluorophores. The Cy5 conjugated probe showed selective labelling of fungi in the presence of bacteria, allowing multiplexed imaging and identification of microbial species in a co-culture of fungi and Gram-positive and Gram-negative bacteria.
Collapse
Affiliation(s)
- Assel Baibek
- EaStChem School of Chemistry, The University of Edinburgh, Edinburgh, UK.
| | - Muhammed Üçüncü
- EaStChem School of Chemistry, The University of Edinburgh, Edinburgh, UK. and Department of Analytical Chemistry, Faculty of Pharmacy, Izmir Katip Celebi University, Izmir, Turkey
| | - Bryn Short
- The University of the West of Scotland, Institute of Healthcare, Policy and Practice, Paisley, UK
| | - Gordon Ramage
- School of Medicine, Dentistry and Nursing, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | | | - Mark Bradley
- EaStChem School of Chemistry, The University of Edinburgh, Edinburgh, UK.
| |
Collapse
|
18
|
Fernandes S, Williams G, Williams E, Ehrlich K, Stone J, Finlayson N, Bradley M, Thomson RR, Akram AR, Dhaliwal K. Solitary pulmonary nodule imaging approaches and the role of optical fibre-based technologies. Eur Respir J 2021; 57:2002537. [PMID: 33060152 PMCID: PMC8174723 DOI: 10.1183/13993003.02537-2020] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 09/29/2020] [Indexed: 12/18/2022]
Abstract
Solitary pulmonary nodules (SPNs) are a clinical challenge, given there is no single clinical sign or radiological feature that definitively identifies a benign from a malignant SPN. The early detection of lung cancer has a huge impact on survival outcome. Consequently, there is great interest in the prompt diagnosis, and treatment of malignant SPNs. Current diagnostic pathways involve endobronchial/transthoracic tissue biopsies or radiological surveillance, which can be associated with suboptimal diagnostic yield, healthcare costs and patient anxiety. Cutting-edge technologies are needed to disrupt and improve, existing care pathways. Optical fibre-based techniques, which can be delivered via the working channel of a bronchoscope or via transthoracic needle, may deliver advanced diagnostic capabilities in patients with SPNs. Optical endomicroscopy, an autofluorescence-based imaging technique, demonstrates abnormal alveolar structure in SPNs in vivo Alternative optical fingerprinting approaches, such as time-resolved fluorescence spectroscopy and fluorescence-lifetime imaging microscopy, have shown promise in discriminating lung cancer from surrounding healthy tissue. Whilst fibre-based Raman spectroscopy has enabled real-time characterisation of SPNs in vivo Fibre-based technologies have the potential to enable in situ characterisation and real-time microscopic imaging of SPNs, which could aid immediate treatment decisions in patients with SPNs. This review discusses advances in current imaging modalities for evaluating SPNs, including computed tomography (CT) and positron emission tomography-CT. It explores the emergence of optical fibre-based technologies, and discusses their potential role in patients with SPNs and suspected lung cancer.
Collapse
Affiliation(s)
- Susan Fernandes
- Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Gareth Williams
- Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Elvira Williams
- Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Katjana Ehrlich
- Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - James Stone
- Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, UK
- Centre for Photonics and Photonic Materials, Dept of Physics, The University of Bath, Bath, UK
| | - Neil Finlayson
- Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, UK
- Institute for Integrated Micro and Nano Systems, School of Engineering, The University of Edinburgh, Edinburgh, UK
| | - Mark Bradley
- Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, UK
- EaStCHEM, School of Chemistry, The University of Edinburgh, Edinburgh, UK
| | - Robert R. Thomson
- Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, UK
- Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK
| | - Ahsan R. Akram
- Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Kevin Dhaliwal
- Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| |
Collapse
|
19
|
Liu W, Miao L, Li X, Xu Z. Development of fluorescent probes targeting the cell wall of pathogenic bacteria. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213646] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
20
|
Peñate Medina T, Kolb JP, Hüttmann G, Huber R, Peñate Medina O, Ha L, Ulloa P, Larsen N, Ferrari A, Rafecas M, Ellrichmann M, Pravdivtseva MS, Anikeeva M, Humbert J, Both M, Hundt JE, Hövener JB. Imaging Inflammation - From Whole Body Imaging to Cellular Resolution. Front Immunol 2021; 12:692222. [PMID: 34248987 PMCID: PMC8264453 DOI: 10.3389/fimmu.2021.692222] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 05/12/2021] [Indexed: 01/31/2023] Open
Abstract
Imaging techniques have evolved impressively lately, allowing whole new concepts like multimodal imaging, personal medicine, theranostic therapies, and molecular imaging to increase general awareness of possiblities of imaging to medicine field. Here, we have collected the selected (3D) imaging modalities and evaluated the recent findings on preclinical and clinical inflammation imaging. The focus has been on the feasibility of imaging to aid in inflammation precision medicine, and the key challenges and opportunities of the imaging modalities are presented. Some examples of the current usage in clinics/close to clinics have been brought out as an example. This review evaluates the future prospects of the imaging technologies for clinical applications in precision medicine from the pre-clinical development point of view.
Collapse
Affiliation(s)
- Tuula Peñate Medina
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center, Schleswig-Holstein Kiel University, Kiel, Germany
- *Correspondence: Tuula Peñate Medina, ; Jan-Bernd Hövener,
| | - Jan Philip Kolb
- Institute of Biomedical Optics, University of Lübeck, Lübeck, Germany
| | - Gereon Hüttmann
- Institute of Biomedical Optics, University of Lübeck, Lübeck, Germany
- Airway Research Center North (ARCN), Member of the German Center of Lung Research (DZL), Gießen, Germany
| | - Robert Huber
- Institute of Biomedical Optics, University of Lübeck, Lübeck, Germany
| | - Oula Peñate Medina
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center, Schleswig-Holstein Kiel University, Kiel, Germany
- Institute for Experimental Cancer Research (IET), University of Kiel, Kiel, Germany
| | - Linh Ha
- Department of Dermatology, Allergology and Venereology, University Hospital Schleswig-Holstein Lübeck (UKSH), Lübeck, Germany
| | - Patricia Ulloa
- Department of Radiology and Neuroradiology, University Medical Centers Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Naomi Larsen
- Department of Radiology and Neuroradiology, University Medical Centers Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Arianna Ferrari
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center, Schleswig-Holstein Kiel University, Kiel, Germany
| | - Magdalena Rafecas
- Institute of Medical Engineering (IMT), University of Lübeck, Lübeck, Germany
| | - Mark Ellrichmann
- Interdisciplinary Endoscopy, Medical Department1, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Mariya S. Pravdivtseva
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center, Schleswig-Holstein Kiel University, Kiel, Germany
- Department of Radiology and Neuroradiology, University Medical Centers Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Mariia Anikeeva
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center, Schleswig-Holstein Kiel University, Kiel, Germany
| | - Jana Humbert
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center, Schleswig-Holstein Kiel University, Kiel, Germany
- Department of Radiology and Neuroradiology, University Medical Centers Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Marcus Both
- Department of Radiology and Neuroradiology, University Medical Centers Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Jennifer E. Hundt
- Lübeck Institute for Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
| | - Jan-Bernd Hövener
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center, Schleswig-Holstein Kiel University, Kiel, Germany
- *Correspondence: Tuula Peñate Medina, ; Jan-Bernd Hövener,
| |
Collapse
|
21
|
Gunasekaran R, Lalitha P, Megia-Fernandez A, Bradley M, Williams RL, Dhaliwal K, Prajna NV, Mills B. Exploratory Use of Fluorescent SmartProbes for the Rapid Detection of Microbial Isolates Causing Corneal Ulcer. Am J Ophthalmol 2020; 219:341-350. [PMID: 32574778 DOI: 10.1016/j.ajo.2020.06.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/06/2020] [Accepted: 06/09/2020] [Indexed: 12/28/2022]
Abstract
PURPOSE To explore the use of optical SmartProbes for the rapid evaluation of corneal scrapes from patients with suspected microbial keratitis, as a clinical alternative to Gram stain. DESIGN Experimental study with evaluation of a diagnostic technology. METHODS Corneal scrapes were collected from 267 patients presenting with microbial keratitis at a referral cornea clinic in South India. Corneal scrapes were flooded with SmartProbes (BAC One or BAC Two) and evaluated by fluorescence microscopy (without the need for sample washing or further processing). The SmartProbe-labeled samples were scored as bacteria/fungi/none (BAC One) or gram-negative bacteria/none (BAC Two) and compared to Gram stain results. RESULTS Compared to Gram stain, BAC One demonstrated sensitivity and specificity of 80.0% and 87.5%, respectively, positive and negative predictive values (PPV, NPV) of 93.8% and 65.1%, and an accuracy of 82.2. BAC Two demonstrated sensitivity and specificity of 93.3% and 84.8%, respectively, an NPV of 99.2%, and an accuracy of 85.6%. When the corresponding culture results were compared to the Gram stain result, the sensitivity and specificity were 73.4% and 70.7%, the PPV and NPVs were 86.5% and 51.0%, and overall accuracy was 72.6. CONCLUSIONS Fluorescent SmartProbes offer a comparative method to Gram stain for delineating gram-positive or gram-negative bacteria or fungi within corneal scrapes. We demonstrate equivalent or higher sensitivity, specificity, PPV and NPVs, and accuracy than culture to Gram stain. Our approach has scope for point-of-care clinical application to aid in the diagnosis of microbial keratitis.
Collapse
Affiliation(s)
| | - Prajna Lalitha
- Departments of Ocular Microbiology, Aravind Eye Hospital, Madurai, India
| | | | - Mark Bradley
- EaStChem, School of Chemistry, University of Edinburgh, Edinburgh, United Kingdom
| | - Rachel L Williams
- Department of Eye and Vision Science, University of Liverpool, Liverpool, United Kingdom
| | - Kevin Dhaliwal
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | | | - Bethany Mills
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom.
| |
Collapse
|
22
|
Mills B, Megia-Fernandez A, Norberg D, Duncan S, Marshall A, Akram AR, Quinn T, Young I, Bruce AM, Scholefield E, Williams GOS, Krstajić N, Choudhary TR, Parker HE, Tanner MG, Harrington K, Wood HAC, Birks TA, Knight JC, Haslett C, Dhaliwal K, Bradley M, Ucuncu M, Stone JM. Molecular detection of Gram-positive bacteria in the human lung through an optical fiber-based endoscope. Eur J Nucl Med Mol Imaging 2020; 48:800-807. [PMID: 32915268 PMCID: PMC7485201 DOI: 10.1007/s00259-020-05021-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 08/31/2020] [Indexed: 12/13/2022]
Abstract
Purpose The relentless rise in antimicrobial resistance is a major societal challenge and requires, as part of its solution, a better understanding of bacterial colonization and infection. To facilitate this, we developed a highly efficient no-wash red optical molecular imaging agent that enables the rapid, selective, and specific visualization of Gram-positive bacteria through a bespoke optical fiber–based delivery/imaging endoscopic device. Methods We rationally designed a no-wash, red, Gram-positive-specific molecular imaging agent (Merocy-Van) based on vancomycin and an environmental merocyanine dye. We demonstrated the specificity and utility of the imaging agent in escalating in vitro and ex vivo whole human lung models (n = 3), utilizing a bespoke fiber–based delivery and imaging device, coupled to a wide-field, two-color endomicroscopy system. Results The imaging agent (Merocy-Van) was specific to Gram-positive bacteria and enabled no-wash imaging of S. aureus within the alveolar space of whole ex vivo human lungs within 60 s of delivery into the field-of-view, using the novel imaging/delivery endomicroscopy device. Conclusion This platform enables the rapid and specific detection of Gram-positive bacteria in the human lung. Electronic supplementary material The online version of this article (10.1007/s00259-020-05021-4) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Bethany Mills
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK.
| | - Alicia Megia-Fernandez
- School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, UK
| | - Dominic Norberg
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Sheelagh Duncan
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Adam Marshall
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Ahsan R Akram
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Thomas Quinn
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Irene Young
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Annya M Bruce
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Emma Scholefield
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Gareth O S Williams
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Nikola Krstajić
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Tushar R Choudhary
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK.,The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK
| | - Helen E Parker
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK.,Department of Applied Physics, Royal Institute of Technology, KTH, SE-106 91, Stockholm, Sweden
| | - Michael G Tanner
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK.,Scottish Universities Physics Alliance (SUPA), Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | - Kerrianne Harrington
- Centre for Photonics and Photonic Materials, Department of Physics, University of Bath, Bath, BA2 7AY, UK
| | - Harry A C Wood
- Centre for Photonics and Photonic Materials, Department of Physics, University of Bath, Bath, BA2 7AY, UK
| | - Timothy A Birks
- Centre for Photonics and Photonic Materials, Department of Physics, University of Bath, Bath, BA2 7AY, UK
| | - Jonathan C Knight
- Centre for Photonics and Photonic Materials, Department of Physics, University of Bath, Bath, BA2 7AY, UK
| | - Christopher Haslett
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Kevin Dhaliwal
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Mark Bradley
- School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, UK.
| | - Muhammed Ucuncu
- School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, UK. .,Department of Analytical Chemistry, Faculty of Pharmacy, Izmir Katip Celebi University, Izmir, Turkey.
| | - James M Stone
- Centre for Photonics and Photonic Materials, Department of Physics, University of Bath, Bath, BA2 7AY, UK.
| |
Collapse
|
23
|
Locke LW, Shankaran K, Gong L, Stoodley P, Vozar SL, Cole SL, Tweedle MF, Wozniak DJ. Evaluation of Peptide-Based Probes toward In Vivo Diagnostic Imaging of Bacterial Biofilm-Associated Infections. ACS Infect Dis 2020; 6:2086-2098. [PMID: 32603591 PMCID: PMC7429274 DOI: 10.1021/acsinfecdis.0c00125] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The clinical management of bacterial biofilm infections represents an enormous challenge in today's healthcare setting. The NIH estimates that 65% of bacterial infections are biofilm-related, and therapeutic outcomes are positively correlated with early intervention. Currently, there is no reliable imaging technique to detect biofilm infections in vivo, and current clinical protocols for accurate and direct biofilm identification are nonexistent. In orthopedic implant-associated biofilm infections, for example, current detection methods are based on nonspecific X-ray or radiolabeled white blood cell imaging, coupled with peri-prosthetic tissue or fluid samples taken invasively, and must be cultured. This approach is time-consuming and often fails to detect biofilm bacteria due to sampling errors and a lack of sensitivity. The ability to quantify bacterial biofilms by real-time noninvasive imaging is an urgent unmet clinical need that would revolutionize the management and treatment of these devastating types of infections. In the present study, we assembled a collection of fluorescently labeled peptide candidates to specifically explore their biofilm targeting properties. We evaluated these fluorescently labeled peptides using various in vitro assays for their ability to specifically and nondestructively target biofilms produced by model bacterial pathogen Pseudomonas aeruginosa. The lead candidate that emerged, 4Iphf-HN17, demonstrated rapid biofilm labeling kinetics, a lack of bactericidal activity, and biofilm targeting specificity in human cell infection models. In vivo fluorescently labeled 4Iphf-HN17 showed enhanced accumulation in biofilm-infected wounds, thus warranting further study.
Collapse
Affiliation(s)
- Landon W. Locke
- Dept. of Microbial Infection and Immunity, The Ohio State University
| | - Kothandaraman Shankaran
- Dept. of Radiology, The Wright Center for Innovation in Biomedical Eng, The Ohio State University
| | - Li Gong
- Dept. of Radiology, The Wright Center for Innovation in Biomedical Eng, The Ohio State University
| | - Paul Stoodley
- Dept. of Microbial Infection and Immunity, The Ohio State University
| | | | - Sara L. Cole
- Campus Microscopy and Imaging Facility, The Ohio State University
| | - Michael F. Tweedle
- Dept. of Radiology, The Wright Center for Innovation in Biomedical Eng, The Ohio State University
| | - Daniel J. Wozniak
- Dept. of Microbial Infection and Immunity, The Ohio State University,Dept. of Microbiology, The Ohio State University
| |
Collapse
|
24
|
Advances in antimicrobial peptides-based biosensing methods for detection of foodborne pathogens: A review. Food Control 2020. [DOI: 10.1016/j.foodcont.2020.107116] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
25
|
Zhu Y, Wang J, Sun Y, Cai Q. A magneto-fluorescence bacteria assay strategy based on dual colour sulfide fluorescent nanoparticles with high near-IR conversion efficiency. Analyst 2020; 145:4436-4441. [PMID: 32469359 DOI: 10.1039/d0an00816h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Anti-Stokes fluorescence induced by near-IR (NIR) radiation is particularly advantageous for the bioassay of complex samples, but most of the commonly used NIR-induced fluorescence nanomaterials such as up-conversion nanoparticles (UCNPs) do not exhibit satisfactory fluorescence intensity and work against achieving a highly sensitive bioassay. In this study, we a construct sensitive and specific bacteria biosensor based on the NIR-stimulated CaS: Eu, Sm, Mn and SrS: Ce, Sm, Mn nanoparticles. The fluorescent nanoparticles are conjugated with bacteria recognition fragments. In addition, the independent emission bands of these two types of fluorescent nanoparticles make it possible to detect and quantify Gram-positive strain and Gram-negative strain, simultaneously. Intense fluorescence and magnetic enrichment of magneto-fluorescence systems enable bacteria discrimination with the naked eye and improve sensitivity in trace bacteria detection (<20 CFU mL-1). The linear relationship between the fluorescence intensity and bacterial concentration is established with a detection range of 25-106 CFU mL-1. Furthermore, this NIR-excited assay strategy demonstrates better anti-interference capability than UV/visible-excited assay methods, showing high potential and practical value for medical diagnostics and bacteria monitoring.
Collapse
Affiliation(s)
- Yanli Zhu
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Hunan University, Changsha 410082, Hunan, China
| | | | | | | |
Collapse
|
26
|
Morris MA, Malek M, Hashemian MH, Nguyen BT, Manuse S, Lewis K, Nowick JS. A Fluorescent Teixobactin Analogue. ACS Chem Biol 2020; 15:1222-1231. [PMID: 32045203 DOI: 10.1021/acschembio.9b00908] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
This report describes the first synthesis and application of a fluorescent teixobactin analogue that exhibits antibiotic activity and binds to the cell walls of Gram-positive bacteria. The teixobactin analogue, Lys(Rhod)9,Arg10-teixobactin, has a fluorescent tag at position 9 and an arginine in place of the natural allo-enduracididine residue at position 10. The fluorescent teixobactin analogue retains partial antibiotic activity, with minimum inhibitory concentrations of 4-8 μg/mL across a panel of Gram-positive bacteria, as compared to 1-4 μg/mL for the unlabeled Arg10-teixobactin analogue. Lys(Rhod)9,Arg10-teixobactin is prepared by a regioselective labeling strategy that labels Lys9 with an amine-reactive rhodamine fluorophore during solid-phase peptide synthesis, with the resulting conjugate tolerating subsequent solid-phase peptide synthesis reactions. Treatment of Gram-positive bacteria with Lys(Rhod)9,Arg10-teixobactin results in septal and lateral staining, which is consistent with an antibiotic targeting cell wall precursors. Concurrent treatment of Lys(Rhod)9,Arg10-teixobactin and BODIPY FL vancomycin results in septal colocalization, providing further evidence that Lys(Rhod)9,Arg10-teixobactin binds to cell wall precursors. Controls with either Gram-negative bacteria, or an inactive fluorescent homologue with Gram-positive bacteria, showed little or no staining in fluorescence micrographic studies. Lys(Rhod)9,Arg10-teixobactin can thus serve as a functional probe to study Gram-positive bacteria and their interactions with teixobactin.
Collapse
Affiliation(s)
- Michael A. Morris
- Department of Chemistry, University of California, Irvine, Irvine, California 92697, United States
| | - Melody Malek
- Department of Chemistry, University of California, Irvine, Irvine, California 92697, United States
| | - Mohammad H. Hashemian
- Department of Chemistry, University of California, Irvine, Irvine, California 92697, United States
| | - Betty T. Nguyen
- Department of Chemistry, University of California, Irvine, Irvine, California 92697, United States
| | - Sylvie Manuse
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Kim Lewis
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - James S. Nowick
- Department of Chemistry, University of California, Irvine, Irvine, California 92697, United States
- Department of Pharmaceutical Sciences, University of California, Irvine, Irvine, California 92697, United States
| |
Collapse
|
27
|
Baibek A, Üçüncü M, Blackburn EA, Bradley M, Lilienkampf A. Wash‐free
,
peptide‐based
fluorogenic probes for microbial imaging. Pept Sci (Hoboken) 2020. [DOI: 10.1002/pep2.24167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Assel Baibek
- EaStCHEM School of Chemistry Joseph Black Building, University of Edinburgh Edinburgh UK
| | - Muhammed Üçüncü
- EaStCHEM School of Chemistry Joseph Black Building, University of Edinburgh Edinburgh UK
| | - Elizabeth A. Blackburn
- The Wellcome Centre for Cell Biology Michael Swann Building, University of Edinburgh Edinburgh UK
| | - Mark Bradley
- EaStCHEM School of Chemistry Joseph Black Building, University of Edinburgh Edinburgh UK
| | - Annamaria Lilienkampf
- EaStCHEM School of Chemistry Joseph Black Building, University of Edinburgh Edinburgh UK
| |
Collapse
|
28
|
Perperidis A, Dhaliwal K, McLaughlin S, Vercauteren T. Image computing for fibre-bundle endomicroscopy: A review. Med Image Anal 2020; 62:101620. [PMID: 32279053 PMCID: PMC7611433 DOI: 10.1016/j.media.2019.101620] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 11/18/2019] [Indexed: 12/12/2022]
Abstract
Endomicroscopy is an emerging imaging modality, that facilitates the acquisition of in vivo, in situ optical biopsies, assisting diagnostic and potentially therapeutic interventions. While there is a diverse and constantly expanding range of commercial and experimental optical biopsy platforms available, fibre-bundle endomicroscopy is currently the most widely used platform and is approved for clinical use in a range of clinical indications. Miniaturised, flexible fibre-bundles, guided through the working channel of endoscopes, needles and catheters, enable high-resolution imaging across a variety of organ systems. Yet, the nature of image acquisition though a fibre-bundle gives rise to several inherent characteristics and limitations necessitating novel and effective image pre- and post-processing algorithms, ranging from image formation, enhancement and mosaicing to pathology detection and quantification. This paper introduces the underlying technology and most prevalent clinical applications of fibre-bundle endomicroscopy, and provides a comprehensive, up-to-date, review of relevant image reconstruction, analysis and understanding/inference methodologies. Furthermore, current limitations as well as future challenges and opportunities in fibre-bundle endomicroscopy computing are identified and discussed.
Collapse
Affiliation(s)
- Antonios Perperidis
- Institute of Sensors, Signals and Systems (ISSS), Heriot Watt University, EH14 4AS, UK; EPSRC IRC "Hub" in Optical Molecular Sensing & Imaging, MRC Centre for Inflammation Research, Queen's Medical Research Institute (QMRI), University of Edinburgh, EH16 4TJ, UK.
| | - Kevin Dhaliwal
- EPSRC IRC "Hub" in Optical Molecular Sensing & Imaging, MRC Centre for Inflammation Research, Queen's Medical Research Institute (QMRI), University of Edinburgh, EH16 4TJ, UK.
| | - Stephen McLaughlin
- Institute of Sensors, Signals and Systems (ISSS), Heriot Watt University, EH14 4AS, UK.
| | - Tom Vercauteren
- School of Biomedical Engineering and Imaging Sciences, King's College London, WC2R 2LS, UK.
| |
Collapse
|
29
|
Gao X, Wu H, Hao Z, Ji X, Lin X, Wang S, Liu Y. A multifunctional plasmonic chip for bacteria capture, imaging, detection, and in situ elimination for wound therapy. NANOSCALE 2020; 12:6489-6497. [PMID: 32154542 DOI: 10.1039/d0nr00638f] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A multifunctional plasmonic gold chip has been constructed for early diagnosis and highly effective killing of bacteria, which is critical for human health. The chip features high bacterial capture efficiency, plasmon-enhanced fluorescence (PEF) and surface-enhanced Raman scattering (SERS) and can act as a highly sensitive sensor for dual-mode bacteria imaging and detection (down to 102 CFU mL-1) with good reliability and accuracy. The developed assay can distinguish Gram-positive S. aureus bacteria from Gram-negative E. coli bacteria, providing valuable information for therapy. Importantly, the chip presents excellent photothermal antibacterial activity (98%) and can inactivate both Gram-positive and Gram-negative bacteria in situ. Furthermore, the chip was used to effectively promote the wound healing process in bacteria infected mice in vivo, showing great potential for antibacterial applications.
Collapse
Affiliation(s)
- Xia Gao
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Haotian Wu
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Zhe Hao
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Xiangyi Ji
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Xiaodong Lin
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Shuo Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China.
| | - Yaqing Liu
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China. and Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing 100048, China
| |
Collapse
|
30
|
Roy E, Nagar A, Chaudhary S, Pal S. AIEgen‐Based Fluorescent Nanomaterials for Bacterial Detection and its Inhibition. ChemistrySelect 2020. [DOI: 10.1002/slct.201904092] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ekta Roy
- Department of Chemistry Government Engineering College Jhalawar Rajasthan India
| | - Achala Nagar
- Department of Chemistry Government Engineering College Jhalawar Rajasthan India
| | - Sandeep Chaudhary
- Department of Chemistry Malaviya National Institute of Technology Jaipur Rajasthan
| | - Souvik Pal
- Department of Chemistry National Taiwan Normal University Taipei Taiwan
| |
Collapse
|
31
|
Akram AR, Chankeshwara SV, Scholefield E, Aslam T, McDonald N, Megia-Fernandez A, Marshall A, Mills B, Avlonitis N, Craven TH, Smyth AM, Collie DS, Gray C, Hirani N, Hill AT, Govan JR, Walsh T, Haslett C, Bradley M, Dhaliwal K. In situ identification of Gram-negative bacteria in human lungs using a topical fluorescent peptide targeting lipid A. Sci Transl Med 2019; 10:10/464/eaal0033. [PMID: 30355797 DOI: 10.1126/scitranslmed.aal0033] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 12/29/2017] [Accepted: 05/31/2018] [Indexed: 12/22/2022]
Abstract
Respiratory infections in mechanically ventilated patients caused by Gram-negative bacteria are a major cause of morbidity. Rapid and unequivocal determination of the presence, localization, and abundance of bacteria is critical for positive resolution of the infections and could be used for patient stratification and for monitoring treatment efficacy. Here, we developed an in situ approach to visualize Gram-negative bacterial species and cellular infiltrates in distal human lungs in real time. We used optical endomicroscopy to visualize a water-soluble optical imaging probe based on the antimicrobial peptide polymyxin conjugated to an environmentally sensitive fluorophore. The probe was chemically stable and nontoxic and, after in-human intrapulmonary microdosing, enabled the specific detection of Gram-negative bacteria in distal human airways and alveoli within minutes. The results suggest that pulmonary molecular imaging using a topically administered fluorescent probe targeting bacterial lipid A is safe and practical, enabling rapid in situ identification of Gram-negative bacteria in humans.
Collapse
Affiliation(s)
- Ahsan R Akram
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK. .,Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Sunay V Chankeshwara
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK.,EaStCHEM, University of Edinburgh School of Chemistry, Joseph Black Building, West Mains Road, Edinburgh EH9 3FJ, UK
| | - Emma Scholefield
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Tashfeen Aslam
- EaStCHEM, University of Edinburgh School of Chemistry, Joseph Black Building, West Mains Road, Edinburgh EH9 3FJ, UK
| | - Neil McDonald
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Alicia Megia-Fernandez
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK.,EaStCHEM, University of Edinburgh School of Chemistry, Joseph Black Building, West Mains Road, Edinburgh EH9 3FJ, UK
| | - Adam Marshall
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK.,Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Bethany Mills
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Nicolaos Avlonitis
- EaStCHEM, University of Edinburgh School of Chemistry, Joseph Black Building, West Mains Road, Edinburgh EH9 3FJ, UK
| | - Thomas H Craven
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK.,Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Annya M Smyth
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - David S Collie
- The Roslin Institute and R(D)SVS, University of Edinburgh, Easter Bush Veterinary Centre, Roslin, Midlothian EH25 9RG, UK
| | - Calum Gray
- Clinical Research Imaging Facility, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Nik Hirani
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Adam T Hill
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - John R Govan
- Division of Infection and Pathway Medicine, University of Edinburgh, The Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, UK
| | - Timothy Walsh
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK.,Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Christopher Haslett
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK.,Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Mark Bradley
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK. .,EaStCHEM, University of Edinburgh School of Chemistry, Joseph Black Building, West Mains Road, Edinburgh EH9 3FJ, UK
| | - Kevin Dhaliwal
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK. .,Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| |
Collapse
|
32
|
Terrey MJ, Holmes A, Perry CC, Cross WB. C–H Olefination of Tryptophan Residues in Peptides: Control of Residue Selectivity and Peptide–Amino Acid Cross-linking. Org Lett 2019; 21:7902-7907. [DOI: 10.1021/acs.orglett.9b02894] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Myles J. Terrey
- Department of Chemistry and Forensic Science, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, U.K
| | - Ashley Holmes
- Department of Chemistry and Forensic Science, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, U.K
| | - Carole C. Perry
- Department of Chemistry and Forensic Science, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, U.K
| | - Warren B. Cross
- Department of Chemistry and Forensic Science, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, U.K
| |
Collapse
|
33
|
Development and validation of an alternative parameter for quantification of signals emitted by fluorescently labelled bacteria in microscopic images. J Microbiol Methods 2019; 166:105717. [PMID: 31505168 DOI: 10.1016/j.mimet.2019.105717] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 09/06/2019] [Accepted: 09/06/2019] [Indexed: 11/21/2022]
Abstract
In this study, an alternative parameter for quantifying the signals of fluorescently labelled bacteria (e.g. propidium iodide, Cyanine 3, etc.) in microscopic images was investigated. Three common parameters (mean grey value (MGV), mean grey value which is corrected for the background (MGVcwB) and the signal to background ratio (SBR) per bacterial cell) are used as reference parameters. As an alternative, the coefficient of variation (CV) is defined as the ratio of the logarithm of the standard deviation and the logarithm of the mean grey value of a bacterial cell in a microscopic image. The actual fluorescence value was safeguarded by measuring commercially available fluorescence latex microspheres at regular time intervals within our study. The precision and the correlation of the respective values of MGV, MGVcwB, SBR and CV taken from identical images were measured and subsequently normalized in order to enhance the inter-parameter comparability. The average precision of CV was the highest (89% ± 14) with decreasing numbers for MGVcwB, SBR, and MGV (78% ± 25, 71% ± 32, and, 52% ± 22, respectively). Changes in operational parameters, e.g., microscope settings, protocol steps, etc., yielded good results for the CV but less precise results for MGV, MGVcwB, and SBR in the analyses of identical images. In conclusion, using the alternative parameter CV, changes in the composition of microbial ecosystems may thus be investigated at the highest precision level.
Collapse
|
34
|
Tang J, Chu B, Wang J, Song B, Su Y, Wang H, He Y. Multifunctional nanoagents for ultrasensitive imaging and photoactive killing of Gram-negative and Gram-positive bacteria. Nat Commun 2019; 10:4057. [PMID: 31492849 PMCID: PMC6731231 DOI: 10.1038/s41467-019-12088-7] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Accepted: 08/15/2019] [Indexed: 01/05/2023] Open
Abstract
Simultaneous imaging and treatment of infections remains a major challenge, with most current approaches being effective against only one specific group of bacteria or not being useful for diagnosis. Here we develop multifunctional nanoagents that can potentially be used for imaging and treatment of infections caused by diverse bacterial pathogens. The nanoagents are made of fluorescent silicon nanoparticles (SiNPs) functionalized with a glucose polymer (e.g., poly[4-O-(α-D-glucopyranosyl)-D-glucopyranose]) and loaded with chlorin e6 (Ce6). They are rapidly internalized into Gram-negative and Gram-positive bacteria by a mechanism dependent on an ATP-binding cassette (ABC) transporter pathway. The nanoagents can be used for imaging bacteria by tracking the green fluorescence of SiNPs and the red fluorescence of Ce6, allowing in vivo detection of as few as 105 colony-forming units. The nanoagents exhibit in vivo photodynamic antibacterial efficiencies of 98% against Staphylococcus aureus and 96% against Pseudomonas aeruginosa under 660 nm irradiation.
Collapse
Affiliation(s)
- Jiali Tang
- Laboratory of Nanoscale Biochemical Analysis, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
| | - Binbin Chu
- Laboratory of Nanoscale Biochemical Analysis, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
| | - Jinhua Wang
- Laboratory of Nanoscale Biochemical Analysis, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
| | - Bin Song
- Laboratory of Nanoscale Biochemical Analysis, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
| | - Yuanyuan Su
- Laboratory of Nanoscale Biochemical Analysis, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
| | - Houyu Wang
- Laboratory of Nanoscale Biochemical Analysis, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China.
| | - Yao He
- Laboratory of Nanoscale Biochemical Analysis, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China.
| |
Collapse
|
35
|
Welling MM, de Korne CM, Spa SJ, van Willigen DM, Hensbergen AW, Bunschoten A, Duszenko N, Smits WK, Roestenberg M, van Leeuwen FWB. Multimodal Tracking of Controlled Staphylococcus aureus Infections in Mice. ACS Infect Dis 2019; 5:1160-1168. [PMID: 31016979 PMCID: PMC6630532 DOI: 10.1021/acsinfecdis.9b00015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Indexed: 12/14/2022]
Abstract
There is a need to develop diagnostic and analytical tools that allow noninvasive monitoring of bacterial growth and dissemination in vivo. For such cell-tracking studies to hold translational value to controlled human infections, in which volunteers are experimentally colonized, they should not require genetic modification, and they should allow tracking over a number of replication cycles. To gauge if an antimicrobial peptide tracer, 99mTc-UBI29-41-Cy5, which contains both a fluorescent and a radioactive moiety, could be used for such in vivo bacterial tracking, we performed longitudinal imaging of a thigh-muscle infection with 99mTc-UBI29-41-Cy5-labeled Staphylococcus aureus. Mice were imaged using SPECT and fluorescence-imaging modalities at various intervals during a 28 h period. Biodistribution analyses were performed to quantitate radioactivity in the abscess and other tissues. SPECT and fluorescence imaging in mice showed clear retention of the 99mTc-UBI29-41-Cy5-labeled bacteria following inoculation in the thigh muscle. Despite bacterial replication, the signal intensity in the abscess only modestly decreased within a 28 h period: 52% of the total injected radioactivity per gram of tissue (%ID/g) at 4 h postinfection (pi) versus 44%ID/g at 28 h pi (15% decrease). After inoculation, a portion of the bacteria disseminated from the abscess, and S. aureus cultures were obtained from radioactive urine samples. Bacterial staining with 99mTc-UBI29-41-Cy5 allowed noninvasive bacterial-cell tracking during a 28 h period. Given the versatility of the presented bacterial-tracking method, we believe that this concept could pave the way for precise imaging capabilities during controlled-human-infection studies.
Collapse
Affiliation(s)
- Mick M. Welling
- Interventional
Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, 2333ZA Leiden, The Netherlands
| | - Clarize M. de Korne
- Interventional
Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, 2333ZA Leiden, The Netherlands
- Department
of Parasitology and Department of Infectious Diseases, Leiden University Medical Center, 2333ZA Leiden, The Netherlands
| | - Silvia J. Spa
- Interventional
Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, 2333ZA Leiden, The Netherlands
| | - Danny M. van Willigen
- Interventional
Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, 2333ZA Leiden, The Netherlands
| | - Albertus W. Hensbergen
- Interventional
Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, 2333ZA Leiden, The Netherlands
| | - Anton Bunschoten
- Interventional
Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, 2333ZA Leiden, The Netherlands
- Laboratory
of BioNanoTechnology, Department of Agrotechnology and Food Sciences, Wageningen University & Research, 6708PB Wageningen, The Netherlands
| | - Nikolas Duszenko
- Interventional
Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, 2333ZA Leiden, The Netherlands
- Department
of Parasitology and Department of Infectious Diseases, Leiden University Medical Center, 2333ZA Leiden, The Netherlands
| | - Wiep Klaas Smits
- Department
of Medical Microbiology, Section Experimental Bacteriology, Leiden University Medical Center, 2333ZA Leiden, The Netherlands
| | - Meta Roestenberg
- Department
of Parasitology and Department of Infectious Diseases, Leiden University Medical Center, 2333ZA Leiden, The Netherlands
| | - Fijs W. B. van Leeuwen
- Interventional
Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, 2333ZA Leiden, The Netherlands
- Laboratory
of BioNanoTechnology, Department of Agrotechnology and Food Sciences, Wageningen University & Research, 6708PB Wageningen, The Netherlands
| |
Collapse
|
36
|
Eldaly AK, Altmann Y, Akram A, McCool P, Perperidis A, Dhaliwal K, McLaughlin S. Bayesian bacterial detection using irregularly sampled optical endomicroscopy images. Med Image Anal 2019; 57:18-31. [PMID: 31261017 DOI: 10.1016/j.media.2019.06.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 06/14/2019] [Accepted: 06/20/2019] [Indexed: 01/21/2023]
Abstract
Pneumonia is a major cause of morbidity and mortality of patients in intensive care. Rapid determination of the presence and gram status of the pathogenic bacteria in the distal lung may enable a more tailored treatment regime. Optical Endomicroscopy (OEM) is an emerging medical imaging platform with preclinical and clinical utility. Pulmonary OEM via multi-core fibre bundles has the potential to provide in vivo, in situ, fluorescent molecular signatures of the causes of infection and inflammation. This paper presents a Bayesian approach for bacterial detection in OEM images. The model considered assumes that the observed pixel fluorescence is a linear combination of the actual intensity value associated with tissues or background, corrupted by additive Gaussian noise and potentially by an additional sparse outlier term modelling anomalies (bacteria). The bacteria detection problem is formulated in a Bayesian framework and prior distributions are assigned to the unknown model parameters. A Markov chain Monte Carlo algorithm based on a partially collapsed Gibbs sampler is used to sample the posterior distribution of the unknown parameters. The proposed algorithm is first validated by simulations conducted using synthetic datasets for which good performance is obtained. Analysis is then conducted using two ex vivo lung datasets in which fluorescently labelled bacteria are present in the distal lung. A good correlation between bacteria counts identified by a trained clinician and those of the proposed method, which detects most of the manually annotated regions, is observed.
Collapse
Affiliation(s)
- Ahmed Karam Eldaly
- Electrical and Electronic Engineering Department, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom; MRC Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, United Kingdom; Biomedical Engineering Department, Faculty of Engineering, Helwan University, Cairo, Egypt.
| | - Yoann Altmann
- Electrical and Electronic Engineering Department, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom.
| | - Ahsan Akram
- MRC Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, United Kingdom.
| | - Paul McCool
- Medical Devices Unit, NHS Greater Glasgow & Clyde, United Kingdom.
| | - Antonios Perperidis
- Electrical and Electronic Engineering Department, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom; MRC Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, United Kingdom.
| | - Kevin Dhaliwal
- MRC Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, United Kingdom.
| | - Stephen McLaughlin
- Electrical and Electronic Engineering Department, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom.
| |
Collapse
|
37
|
Akram AR, Avlonitis N, Scholefield E, Vendrell M, McDonald N, Aslam T, Craven TH, Gray C, Collie DS, Fisher AJ, Corris PA, Walsh T, Haslett C, Bradley M, Dhaliwal K. Enhanced avidity from a multivalent fluorescent antimicrobial peptide enables pathogen detection in a human lung model. Sci Rep 2019; 9:8422. [PMID: 31182770 PMCID: PMC6557859 DOI: 10.1038/s41598-019-44804-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 05/20/2019] [Indexed: 12/19/2022] Open
Abstract
Rapid in situ detection of pathogens coupled with high resolution imaging in the distal human lung has the potential to provide new insights and diagnostic utility in patients in whom pneumonia is suspected. We have previously described an antimicrobial peptide (AMP) Ubiquicidin (fragment UBI29-41) labelled with an environmentally sensitive fluorophore that optically detected bacteria in vitro but not ex vivo. Here, we describe further chemical development of this compound and demonstrate that altering the secondary structure of the AMP to generate a tri-branched dendrimeric scaffold provides enhanced signal in vitro and ex vivo and consequently allows the rapid detection of pathogens in situ in an explanted human lung. This compound (NBD-UBIdend) demonstrates bacterial labelling specificity for a broad panel of pathogenic bacteria and Aspergillus fumigatus. NBD-UBIdend demonstrated high signal-to-noise fluorescence amplification upon target engagement, did not label host mammalian cells and was non-toxic and chemically robust within the inflamed biological environment. Intrapulmonary delivery of NBD-UBIdend, coupled with optical endomicroscopy demonstrated real-time, in situ detection of bacteria in explanted whole human Cystic Fibrosis lungs.
Collapse
Affiliation(s)
- Ahsan R Akram
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh BioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, United Kingdom.
| | - Nicolaos Avlonitis
- EaStCHEM, The University of Edinburgh School of Chemistry, Joseph Black Building, West Mains Road, EH9 3FJ, Edinburgh, United Kingdom
| | - Emma Scholefield
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh BioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, United Kingdom
| | - Marc Vendrell
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh BioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, United Kingdom
| | - Neil McDonald
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh BioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, United Kingdom
| | - Tashfeen Aslam
- EaStCHEM, The University of Edinburgh School of Chemistry, Joseph Black Building, West Mains Road, EH9 3FJ, Edinburgh, United Kingdom
| | - Thomas H Craven
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh BioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, United Kingdom
| | - Calum Gray
- Clinical Research Imaging Centre, Queen's Medical Research Institute, Edinburgh BioQuarter, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, United Kingdom
| | - David S Collie
- The Roslin Institute and R(D)SVS, The University of Edinburgh, Easter Bush Veterinary Centre, Roslin, Midlothian, United Kingdom
| | - Andrew J Fisher
- Institute of Transplantation, Newcastle University, Freeman Hospital, High Heaton, Newcastle upon Tyne, NE7 7DN, United Kingdom
| | - Paul A Corris
- Institute of Transplantation, Newcastle University, Freeman Hospital, High Heaton, Newcastle upon Tyne, NE7 7DN, United Kingdom
| | - Timothy Walsh
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh BioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, United Kingdom
| | - Christopher Haslett
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh BioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, United Kingdom
| | - Mark Bradley
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh BioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, United Kingdom.
- EaStCHEM, The University of Edinburgh School of Chemistry, Joseph Black Building, West Mains Road, EH9 3FJ, Edinburgh, United Kingdom.
| | - Kevin Dhaliwal
- EPSRC IRC PROTEUS Hub, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh BioQuarter, 47 Little France Crescent, Edinburgh, EH16 4TJ, United Kingdom.
| |
Collapse
|
38
|
Parker HE, Stone JM, Marshall ADL, Choudhary TR, Thomson RR, Dhaliwal K, Tanner MG. Fibre-based spectral ratio endomicroscopy for contrast enhancement of bacterial imaging and pulmonary autofluorescence. BIOMEDICAL OPTICS EXPRESS 2019; 10:1856-1869. [PMID: 31086708 PMCID: PMC6485003 DOI: 10.1364/boe.10.001856] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 02/21/2019] [Accepted: 02/25/2019] [Indexed: 06/01/2023]
Abstract
Fibre-based optical endomicroscopy (OEM) permits high resolution fluorescence microscopy in endoscopically accessible tissues. Fibred OEM has the potential to visualise pathologies targeted with fluorescent imaging probes and provide an in vivo in situ molecular pathology platform to augment disease understanding, diagnosis and stratification. Here we present an inexpensive widefield ratiometric fibred OEM system capable of enhancing the contrast between similar spectra of pathologically relevant fluorescent signals without the burden of complex spectral unmixing. As an exemplar, we demonstrate the potential of the platform to detect fluorescently labelled Gram-negative bacteria in the challenging environment of highly autofluorescent lung tissue in whole ex vivo human lungs.
Collapse
Affiliation(s)
- Helen E. Parker
- EPSRC Proteus IRC Hub in Optical Molecular Sensing & Imaging, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - James M. Stone
- EPSRC Proteus IRC Hub in Optical Molecular Sensing & Imaging, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
- Centre for Photonics and Photonic Materials, Department of Physics, University of Bath, Bath, UK
| | - Adam D. L. Marshall
- EPSRC Proteus IRC Hub in Optical Molecular Sensing & Imaging, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Tushar R. Choudhary
- EPSRC Proteus IRC Hub in Optical Molecular Sensing & Imaging, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
- Institute of Biological Chemistry, Biophysics and Bioengineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK
| | - Robert R. Thomson
- EPSRC Proteus IRC Hub in Optical Molecular Sensing & Imaging, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
- Scottish Universities Physics Alliance (SUPA), Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK
| | - Kevin Dhaliwal
- EPSRC Proteus IRC Hub in Optical Molecular Sensing & Imaging, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Michael G. Tanner
- EPSRC Proteus IRC Hub in Optical Molecular Sensing & Imaging, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
- Scottish Universities Physics Alliance (SUPA), Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK
| |
Collapse
|
39
|
Selectivity of Antimicrobial Peptides: A Complex Interplay of Multiple Equilibria. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1117:175-214. [DOI: 10.1007/978-981-13-3588-4_11] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
40
|
Chu W, Yang Y, Qin S, Cai J, Bai M, Kong H, Zhang E. Low-toxicity amphiphilic molecules linked by an aromatic nucleus show broad-spectrum antibacterial activity and low drug resistance. Chem Commun (Camb) 2019; 55:4307-4310. [DOI: 10.1039/c9cc00857h] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Amphiphilic molecules linked by an aromatic nucleus, possessing strong bactericidal activity, high selectivity, less drug resistance, and high in vivo efficacy against MRSA, were developed.
Collapse
Affiliation(s)
- Wenchao Chu
- School of Pharmaceutical Sciences
- Institute of Drug Discovery and Development
- Key Laboratory of Advanced Pharmaceutical Technology
- Ministry of Education of China
- Zhengzhou University
| | - Yi Yang
- School of Pharmaceutical Sciences
- Institute of Drug Discovery and Development
- Key Laboratory of Advanced Pharmaceutical Technology
- Ministry of Education of China
- Zhengzhou University
| | - Shangshang Qin
- School of Pharmaceutical Sciences
- Institute of Drug Discovery and Development
- Key Laboratory of Advanced Pharmaceutical Technology
- Ministry of Education of China
- Zhengzhou University
| | - Jianfeng Cai
- Department of Chemistry
- University of South Florida
- Tampa
- USA
| | - Mengmeng Bai
- School of Pharmaceutical Sciences
- Institute of Drug Discovery and Development
- Key Laboratory of Advanced Pharmaceutical Technology
- Ministry of Education of China
- Zhengzhou University
| | - Hongtao Kong
- School of Pharmaceutical Sciences
- Institute of Drug Discovery and Development
- Key Laboratory of Advanced Pharmaceutical Technology
- Ministry of Education of China
- Zhengzhou University
| | - En Zhang
- School of Pharmaceutical Sciences
- Institute of Drug Discovery and Development
- Key Laboratory of Advanced Pharmaceutical Technology
- Ministry of Education of China
- Zhengzhou University
| |
Collapse
|
41
|
Terrey MJ, Perry CC, Cross WB. Postsynthetic Modification of Phenylalanine Containing Peptides by C–H Functionalization. Org Lett 2018; 21:104-108. [DOI: 10.1021/acs.orglett.8b03536] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Myles J. Terrey
- Department of Chemistry and Forensic Science, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, U.K
| | - Carole C. Perry
- Department of Chemistry and Forensic Science, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, U.K
| | - Warren B. Cross
- Department of Chemistry and Forensic Science, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, U.K
| |
Collapse
|
42
|
Naqvi SAR, Roohi S, Sabir H, Shahzad SA, Aziz A, Rasheed R. Susceptibility of 99mTc-Ciprofloxacin for Common Infection Causing Bacterial Strains Isolated from Clinical Samples: an In Vitro and In Vivo Study. Appl Biochem Biotechnol 2018; 188:424-435. [PMID: 30515632 DOI: 10.1007/s12010-018-2915-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 11/05/2018] [Indexed: 11/28/2022]
Abstract
99mTc-ciprofloxacin scintigraphy is useful in the detection of gram-positive and gram-negative bacterial infections and also for differentiating the infection from aseptic inflammation. However, due to growing bacterial resistance to antibiotics, the 99mTc-ciprofloxacin no longer can be effective in broad-spectrum infection imaging as it is gradually losing specificity. In this study, we are presenting our findings regarding the in vitro and in vivo susceptibility of 99mTc-ciprofloxacin for multi-drug-resistant Staphylococcus aurous, Escherichia coli, and Pseudomonas aeruginosa bacterial strains which were isolated from clinical samples. The results of radiosynthesis of 99mTc-ciprofloxacin showed more the 95% radiochemical purity and less than 5% radioactive impurities. In vitro 99mTc-ciprofloxacin susceptibility test showed that E. coli offered more resistant to 99mTc-ciprofloxacin as compared to S. aurous and P. aeruginosa. In vivo study using bacterial infection induced rabbit model also revealed lowest uptake by E. coli lesion. The T/NT values were obtained 1.96 ± 0.15 in the case of E. coli; 2.81 ± 0.51 in the case of S. aurous; and 2.32 ± 0.66 in the case of P. aeruginosa at 4 h post-injection. The SPECT infection imaging of S. aurous, E. coli, and P. aeruginosa bacterial infection induced rabbit models also indicated the clear accumulation in S. aurous and P. aeruginosa lesions while negligible uptake by E. coli lesion further verify the in vitro and in vivo susceptibility profile. On the bases of the results obtained, the 99mTc-ciprofloxacin showed selective and poor broad spectrum SPECT infection imaging.
Collapse
Affiliation(s)
- Syed Ali Raza Naqvi
- Department of Chemistry, Government College University, New Campus, Faisalabad, 38000, Pakistan.
| | - Samina Roohi
- Isotope Production Division, Pakistan Institute of Nuclear Science and Technology (PINSTECH), Nilor, Islamabad, Pakistan
| | - Hassina Sabir
- Department of Chemistry, Government College University, New Campus, Faisalabad, 38000, Pakistan
| | - Sohail Anjum Shahzad
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan
| | - Aysha Aziz
- Department of Chemistry, Government College University, New Campus, Faisalabad, 38000, Pakistan
| | - Rashid Rasheed
- Department of Chemistry, Government College University, New Campus, Faisalabad, 38000, Pakistan
| |
Collapse
|
43
|
Teicoplanin-functionalized magnetic beads for detection of Staphylococcus aureus via inhibition of the luminol chemiluminescence by intracellular catalase. Mikrochim Acta 2018; 185:391. [DOI: 10.1007/s00604-018-2921-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 07/15/2018] [Indexed: 11/27/2022]
|
44
|
Knighton N, Cottle B, Dentan V, Vercauteren T, Akram A, Bruce A, Dhaliwal K, Hitchcock R. Development of an alveolar transbronchial catheter for concurrent fiber optics based imaging and fluid delivery. J Med Device 2018; 12. [PMID: 34109013 DOI: 10.1115/1.4040639] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Optical molecular imaging is an emerging field and high resolution optical imaging of the distal lung parenchyma has been made possible with the advent of clinically approved fiber based imaging modalities. However, currently, there is no single method of allowing the simultaneous imaging and delivery of targeted molecular imaging agents. The objective of this research is to create a catheterized device capable of fulfilling this need. We describe the rationale, development, and validation in ex vivo ovine lung to near clinical readiness of a triple lumen bronchoscopy catheter that allows concurrent imaging and fluid delivery, with the aim of clinical use to deliver multiple fluorescent compounds to image alveolar pathology. Using this device, we were able to produce high-quality images of bacterial infiltrates in ex-vivo ovine lung within 60 seconds of instilling a single microdose of (<100 mcgs) imaging agent. This has many advantages for future clinical usage over the current state of the art.
Collapse
Affiliation(s)
- Nathan Knighton
- Department of Bioengineering, University of Utah, 36 S Wasatch Dr., Salt Lake City UT, 84112
| | - Brian Cottle
- Department of Bioengineering, University of Utah, 36 S Wasatch Dr., Salt Lake City UT, 84112
| | | | - Tom Vercauteren
- University College London, Wellcome / EPSRC Centre for Interventional and Surgical Sciences, Charles Bell House, 43-45 Foley Street, London W1W 7TS, United Kingdom
| | - Ahsan Akram
- EPSRC Proteus Hub, MRC Centre for Inflammation Research, The University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh EH16 4TJ, United Kingdom
| | - Annya Bruce
- EPSRC Proteus Hub, MRC Centre for Inflammation Research, The University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh EH16 4TJ, United Kingdom
| | - Kevin Dhaliwal
- EPSRC Proteus Hub, MRC Centre for Inflammation Research, The University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh EH16 4TJ, United Kingdom
| | - Robert Hitchcock
- Department of Bioengineering, University of Utah, 36 S Wasatch Dr., Salt Lake City UT, 84112
| |
Collapse
|
45
|
Chen J, Gao M, Wang L, Li S, He J, Qin A, Ren L, Wang Y, Tang BZ. Aggregation-Induced Emission Probe for Study of the Bactericidal Mechanism of Antimicrobial Peptides. ACS APPLIED MATERIALS & INTERFACES 2018; 10:11436-11442. [PMID: 29564898 DOI: 10.1021/acsami.7b18221] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Multidrug resistant bacterial infection has become one of the most serious threats to human health. Antimicrobial peptides (AMPs) have been identified as potential alternatives to antibiotics owing to their excellent bactericidal activity. However, the complicated bactericidal mechanism of AMPs is still poorly understood. Fluorescence imaging has many advantages in terms of dynamic monitoring, easy operation, and high sensitivity. In this study, we developed an aggregation-induced emission (AIE)-active probe AMP-2HBT by decorating the antimicrobial peptide HHC36 (KRWWKWWRR) with an AIEgen of 2-(2-hydroxyphenyl)benzothiazole (HBT). This AIE-active probe exhibited an excellent light-up fluorescence after binding with bacteria, enabling a real-time monitoring of the binding process. Moreover, a similar time-dependent bactericidal kinetics was observed for the AIE-active probe and HHC36 peptide, which indicated that the bactericidal activity of the peptide was not compromised by decorating with the AIEgen. The bactericidal mechanism of HHC36 peptide was further investigated by super-resolution fluorescence microscopy, transmission electron microscopy (TEM), and scanning electron microscopy (SEM), which suggested that the probe tended to accumulate on the bacterial membrane and efficiently disrupt the membrane structure to kill both Gram-positive and -negative bacteria. This AIE-active probe thus provided a convenient tool to investigate the bactericidal mechanism of AMPs.
Collapse
Affiliation(s)
- Junjian Chen
- National Engineering Research Center for Tissue Restoration and Reconstruction , South China University of Technology , Guangzhou 510006 , China
- School of Materials Science and Engineering , South China University of Technology , Guangzhou 510640 , China
| | - Meng Gao
- National Engineering Research Center for Tissue Restoration and Reconstruction , South China University of Technology , Guangzhou 510006 , China
- School of Materials Science and Engineering , South China University of Technology , Guangzhou 510640 , China
| | - Lin Wang
- National Engineering Research Center for Tissue Restoration and Reconstruction , South China University of Technology , Guangzhou 510006 , China
- School of Materials Science and Engineering , South China University of Technology , Guangzhou 510640 , China
| | - Shiwu Li
- School of Materials Science and Engineering , South China University of Technology , Guangzhou 510640 , China
- Guangdong Innovative Research Team, Center for Aggregation-Induced Emission, State Key Laboratory of Luminescent Materials & Devices , South China University of Technology , Guangzhou 510640 , China
| | - Jingcai He
- National Engineering Research Center for Tissue Restoration and Reconstruction , South China University of Technology , Guangzhou 510006 , China
| | - Anjun Qin
- School of Materials Science and Engineering , South China University of Technology , Guangzhou 510640 , China
- Guangdong Innovative Research Team, Center for Aggregation-Induced Emission, State Key Laboratory of Luminescent Materials & Devices , South China University of Technology , Guangzhou 510640 , China
| | - Li Ren
- School of Materials Science and Engineering , South China University of Technology , Guangzhou 510640 , China
| | - Yingjun Wang
- National Engineering Research Center for Tissue Restoration and Reconstruction , South China University of Technology , Guangzhou 510006 , China
| | - Ben Zhong Tang
- Guangdong Innovative Research Team, Center for Aggregation-Induced Emission, State Key Laboratory of Luminescent Materials & Devices , South China University of Technology , Guangzhou 510640 , China
- Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction , The Hong Kong University of Science & Technology , Clear Water Bay, Kowloon , Hong Kong , China
| |
Collapse
|
46
|
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.
Collapse
|
47
|
|
48
|
Fleming H, McAughtrie S, Mills B, Tanner MG, Marks A, Campbell CJ. Dual purpose fibre – SERS pH sensing and bacterial analysis. Analyst 2018; 143:5918-5925. [DOI: 10.1039/c8an01322e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A way to incorporate SERS nanosensors on the end of an optical fibre that also allows for the extraction of bacterial samples.
Collapse
Affiliation(s)
- Holly Fleming
- EaStCHEM
- School of Chemistry
- University of Edinburgh
- Edinburgh
- UK
| | | | - Bethany Mills
- Centre for Inflammation Research
- Queen's Medical Research Institute
- University of Edinburgh
- Edinburgh
- UK
| | - Michael G. Tanner
- Centre for Inflammation Research
- Queen's Medical Research Institute
- University of Edinburgh
- Edinburgh
- UK
| | - Angus Marks
- EaStCHEM
- School of Chemistry
- University of Edinburgh
- Edinburgh
- UK
| | | |
Collapse
|
49
|
Mills B, Akram AR, Scholefield E, Bradley M, Dhaliwal K. Optical Screening of Novel Bacteria-specific Probes on Ex Vivo Human Lung Tissue by Confocal Laser Endomicroscopy. J Vis Exp 2017. [PMID: 29286374 PMCID: PMC5755507 DOI: 10.3791/56284] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Improving the speed and accuracy of bacterial detection is important for patient stratification and to ensure the appropriate use of antimicrobials. To achieve this goal, the development of diagnostic techniques to recognize bacterial presence in real-time at the point-of-care is required. Optical imaging for direct identification of bacteria within the host is an attractive approach. Several attempts at chemical probe design and validation have been investigated, however none have yet been successfully translated into the clinic. Here we describe a method for ex vivo validation of bacteria-specific probes for identification of bacteria within the distal lung, imaged by fibered confocal fluorescence microscopy (FCFM). Our model used ex vivo human lung tissue and a clinically approved confocal laser endomicroscopy (CLE) platform to screen novel bacteria-specific imaging compounds, closely mimicking imaging conditions expected to be encountered with patients. Therefore, screening compounds by this technique provides confidence of potential clinical tractability.
Collapse
Affiliation(s)
- Bethany Mills
- EPSRC Proteus Hub, MRC Centre of Inflammation Research, Queen's Medical Research Institute, University of Edinburgh
| | - Ahsan R Akram
- EPSRC Proteus Hub, MRC Centre of Inflammation Research, Queen's Medical Research Institute, University of Edinburgh
| | - Emma Scholefield
- EPSRC Proteus Hub, MRC Centre of Inflammation Research, Queen's Medical Research Institute, University of Edinburgh
| | - Mark Bradley
- School of Chemistry, EaStChem, University of Edinburgh
| | - Kevin Dhaliwal
- EPSRC Proteus Hub, MRC Centre of Inflammation Research, Queen's Medical Research Institute, University of Edinburgh;
| |
Collapse
|
50
|
Chen PHC, Ho SY, Chen PL, Hung TC, Liang AJ, Kuo TF, Huang HC, Wang TSA. Selective Targeting of Vibrios by Fluorescent Siderophore-Based Probes. ACS Chem Biol 2017; 12:2720-2724. [PMID: 28991433 DOI: 10.1021/acschembio.7b00667] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Siderophores are small molecules used to specifically transport iron into bacteria via related receptors. By adapting siderophores and hijacking their pathways, we may discover an efficient and selective way to target microbes. Herein, we report the synthesis of a siderophore-fluorophore conjugate VF-FL derived from vibrioferrin (VF). Using flow cytometry and fluorescence microscopy, the probe selectively labeled vibrios, including V. parahaemolyticus, V. cholerae, and V. vulnificus, even in the presence of other species such as S. aureus and E. coli. The labeling is siderophore-related and both iron-limited conditions and the siderophore moiety are required. The competitive relationship between VF-FL and VF in vibrios implies an unreported VF-related transport mechanism in V. cholerae and V. vulnificus. These studies demonstrate that the siderophore scaffold provides a method to selectively target microbes expressing cognate receptors under iron-limited conditions.
Collapse
Affiliation(s)
- Peng-Hsun Chase Chen
- Department
of Chemistry, National Taiwan University, Taipei, 10617, Taiwan (Republic of China)
| | - Sheng-Yang Ho
- Department
of Chemistry, National Taiwan University, Taipei, 10617, Taiwan (Republic of China)
| | - Pin-Lung Chen
- Department
of Chemistry, National Taiwan University, Taipei, 10617, Taiwan (Republic of China)
| | - Tzu-Chiao Hung
- Institute
of Molecular and Cellular Biology, National Taiwan University, Taipei, 10617, Taiwan (Republic of China)
| | - An-Jou Liang
- Institute
of Molecular and Cellular Biology, National Taiwan University, Taipei, 10617, Taiwan (Republic of China)
| | - Tang-Feng Kuo
- Department
of Chemistry, National Taiwan University, Taipei, 10617, Taiwan (Republic of China)
| | - Hsiao-Chun Huang
- Institute
of Molecular and Cellular Biology, National Taiwan University, Taipei, 10617, Taiwan (Republic of China)
| | - Tsung-Shing Andrew Wang
- Department
of Chemistry, National Taiwan University, Taipei, 10617, Taiwan (Republic of China)
| |
Collapse
|