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González MI, González-Arjona M, Cussó L, Morcillo MÁ, Aguilera-Correa JJ, Esteban J, Kestler M, Calle D, Cerón C, Cortes-Canteli M, Muñoz P, Bouza E, Desco M, Salinas B. In Vivo Detection of Staphylococcus aureus Infections Using Radiolabeled Antibodies Specific for Bacterial Toxins. Int J Biomed Imaging 2024; 2024:3655327. [PMID: 38665417 PMCID: PMC11045290 DOI: 10.1155/2024/3655327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 01/02/2024] [Accepted: 01/13/2024] [Indexed: 04/28/2024] Open
Abstract
Purpose The Gram-positive Staphylococcus aureus bacterium is one of the leading causes of infection in humans. The lack of specific noninvasive techniques for diagnosis of staphylococcal infection together with the severity of its associated complications support the need for new specific and selective diagnostic tools. This work presents the successful synthesis of an immunotracer that targets the α-toxin released by S. aureus. Methods [89Zr]Zr-DFO-ToxAb was synthesized based on radiolabeling an anti-α-toxin antibody with zirconium-89. The physicochemical characterization of the immunotracer was performed by high-performance liquid chromatography (HPLC), radio-thin layer chromatography (radio-TLC), and electrophoretic analysis. Its diagnostic ability was evaluated in vivo by positron emission tomography/computed tomography (PET/CT) imaging in an animal model of local infection-inflammation (active S. aureus vs. heat-killed S. aureus) and infective osteoarthritis. Results Chemical characterization of the tracer established the high radiochemical yield and purity of the tracer while maintaining antibody integrity. In vivo PET/CT image confirmed the ability of the tracer to detect active foci of S. aureus. Those results were supported by ex vivo biodistribution studies, autoradiography, and histology, which confirmed the ability of [89Zr]Zr-DFO-ToxAb to detect staphylococcal infectious foci, avoiding false-positives derived from inflammatory processes. Conclusions We have developed an immuno-PET tracer capable of detecting S. aureus infections based on a radiolabeled antibody specific for the staphylococcal alpha toxins. The in vivo assessment of [89Zr]Zr-DFO-ToxAb confirmed its ability to selectively detect staphylococcal infectious foci, allowing us to discern between infectious and inflammatory processes.
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Affiliation(s)
- María Isabel González
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Mario González-Arjona
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain
| | - Lorena Cussó
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
- CIBER de Salud Mental, Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Miguel Ángel Morcillo
- Unidad de Aplicaciones Médicas de las Radiaciones Ionizantes, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain
| | - John Jairo Aguilera-Correa
- Departamento de Química en Ciencias Farmacéuticas, Universidad Complutense de Madrid, 28040 Madrid, Spain
- Servicio de Microbiología Clínica Instituto de Investigación Sanitaria Fundación Jiménez Díaz, UAM, 28040 Madrid, Spain
- CIBERINFEC-CIBER de Enfermedades Infecciosas, Madrid, Spain
| | - Jaime Esteban
- Servicio de Microbiología Clínica Instituto de Investigación Sanitaria Fundación Jiménez Díaz, UAM, 28040 Madrid, Spain
- CIBERINFEC-CIBER de Enfermedades Infecciosas, Madrid, Spain
| | - Martha Kestler
- Servicio de Microbiología y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, 28007 Madrid, Spain
| | - Daniel Calle
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Carlos Cerón
- Cardiovascular Risk Factors and Brain Function Programme, Centro Nacional de Investigaciones Cardiovasculares (CNIC) Carlos III, 28029 Madrid, Spain
| | - Marta Cortes-Canteli
- Cardiovascular Risk Factors and Brain Function Programme, Centro Nacional de Investigaciones Cardiovasculares (CNIC) Carlos III, 28029 Madrid, Spain
- Instituto de Investigación Sanitaria Fundación Jiménez Díaz (IIS-FJD), 28040 Madrid, Spain
| | - Patricia Muñoz
- CIBER de Salud Mental, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Servicio de Microbiología y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, 28007 Madrid, Spain
- Departamento de Medicina, Facultad de Medicina, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Emilio Bouza
- CIBER de Salud Mental, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Servicio de Microbiología y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, 28007 Madrid, Spain
- Departamento de Medicina, Facultad de Medicina, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Manuel Desco
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
- CIBER de Salud Mental, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, 28911 Madrid, Spain
| | - Beatriz Salinas
- Unidad de Medicina y Cirugía Experimental, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), 28007 Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
- CIBER de Salud Mental, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, 28911 Madrid, Spain
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Zhang Y, Hao M, Li L, Luo Q, Deng S, Yang Y, Liu Y, Fang W, Song E. Research progress of contrast agents for bacterial infection imaging in vivo. Trends Analyt Chem 2023. [DOI: 10.1016/j.trac.2023.116916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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3
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Maity S, Maity AC, Das AK, Bhattacharyya N. Dual-mode chemosensor for the fluorescence detection of zinc and hypochlorite on a fluorescein backbone and its cell-imaging applications. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:2739-2744. [PMID: 35775440 DOI: 10.1039/d2ay00855f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Fluorescein coupled with 3-(aminomethyl)-4,6-dimethylpyridin-2(1H)-one (FAD) was synthesized for the selective recognition of Zn2+ over other interfering metal ions in acetonitrile/aqueous buffer (1 : 1). Interestingly, there was a significant fluorescence enhancement of FAD in association with Zn2+ at 426 nm by strong chelation-induced fluorescence enhancement (CHEF) without interrupting the cyclic spirolactam ring. A binding stoichiometric ratio of 1 : 2 for the ligand FAD with metal Zn2+ was proven by a Jobs plot. However, the cyclic spirolactam ring was opened by hypochlorite (OCl-) as well as oxidative cleavage of the imine bond, which resulted in the emission enhancement of the wavelength at 520 nm. The binding constant and detection limit of FAD towards Zn2+ were determined to be 1 × 104 M-1 and 1.79 μM, respectively, and the detection limit for OCl- was determined as 2.24 μM. We introduced here a dual-mode chemosensor FAD having both the reactive functionalities for the simultaneous detection of Zn2+ and OCl- by employing a metal coordination (Zn2+) and analytes (OCl-) induced chemodosimetric approach, respectively. Furthermore, for the practical application, we studied the fluorescence imaging inside HeLa cells by using FAD, which demonstrated it can be very useful as a selective and sensitive fluorescent probe for zinc.
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Affiliation(s)
- Sibaprasad Maity
- Department of Applied Sciences, Haldia Institute of Technology, Hatiberia, Haldia 721657, West Bengal, India.
| | - Annada C Maity
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal, India
| | - Avijit Kumar Das
- Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bengaluru, Karnataka, 560029, India.
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Moreira L, Guimarães NM, Pereira S, Santos RS, Loureiro JA, Pereira MC, Azevedo NF. Liposome Delivery of Nucleic Acids in Bacteria: Toward In Vivo Labeling of Human Microbiota. ACS Infect Dis 2022; 8:1218-1230. [PMID: 35737929 PMCID: PMC9775462 DOI: 10.1021/acsinfecdis.1c00601] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Development of specific probes to study the in vivo spatial distribution of microorganisms is essential to understand the ecology of human microbiota. Herein, we assess the possibility of using liposomes loaded with fluorescently labeled nucleic acid mimics (LipoNAMs) to image Gram-negative and Gram-positive bacteria. We proved that liposome fusion efficiencies were similar in both Gram-negative and Gram-positive bacteria but that the efficiency was highly dependent on the lipid concentration. Notably, LipoNAMs were significantly more effective for the internalization of oligonucleotides in bacteria than the fixation/permeabilization methods commonly used in vitro. Furthermore, a structural and morphological assessment of the changes on bacteria allowed us to observe that liposomes increased the permeability of the cell envelope especially in Gram-negative bacteria. Considering the delivery efficiency and permeabilization effect, lipid concentrations of approximately 5 mM should be selected to maximize the detection of bacteria without compromising the bacterial cellular structure.
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Affiliation(s)
- Luís Moreira
- LEPABE
- Laboratory for Process Engineering, Environment, Biotechnology and
Energy, Faculty of Engineering, University
of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal,ALiCE
- Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Nuno M. Guimarães
- LEPABE
- Laboratory for Process Engineering, Environment, Biotechnology and
Energy, Faculty of Engineering, University
of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal,ALiCE
- Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal,. Fax: +351 22 508 14 40
| | - Sara Pereira
- LEPABE
- Laboratory for Process Engineering, Environment, Biotechnology and
Energy, Faculty of Engineering, University
of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal,ALiCE
- Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Rita S. Santos
- LEPABE
- Laboratory for Process Engineering, Environment, Biotechnology and
Energy, Faculty of Engineering, University
of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal,ALiCE
- Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Joana A. Loureiro
- LEPABE
- Laboratory for Process Engineering, Environment, Biotechnology and
Energy, Faculty of Engineering, University
of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal,ALiCE
- Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Maria C. Pereira
- LEPABE
- Laboratory for Process Engineering, Environment, Biotechnology and
Energy, Faculty of Engineering, University
of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal,ALiCE
- Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Nuno F. Azevedo
- LEPABE
- Laboratory for Process Engineering, Environment, Biotechnology and
Energy, Faculty of Engineering, University
of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal,ALiCE
- Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
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Morsby JJ, Atkinson KM, Shradha Reddy Kommidi S, Freel T, Janeková H, Štacko P, Smith BD. Structure-Activity Studies of Nitroreductase-Responsive Near-Infrared Heptamethine Cyanine Fluorescent Probes. European J Org Chem 2022; 2022:e202200270. [PMID: 38322783 PMCID: PMC10846533 DOI: 10.1002/ejoc.202200270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Indexed: 11/12/2022]
Abstract
Two new classes of near-infrared molecular probes were prepared and shown to exhibit "turn on" fluorescence when cleaved by the nitroreductase enzyme, a well-known biomarker of cell hypoxia. The fluorescent probes are heptamethine cyanine dyes with a central 4'-carboxylic ester group on the heptamethine chain that is converted by a self-immolative fragmentation mechanism to a 4'-caboxylate group that greatly enhances the fluorescence brightness. Each compound was prepared by ring opening of a Zincke salt. The chemical structures have either terminal benzoindolinenes or propargyloxy auxochromes, which provide favorable red-shifted absorption/emission wavelengths and a hyperchromic effect that enhances the photon output when excited by 808 nm light. A fluorescent probe with terminal propargyloxy-indolenines exhibited less self-aggregation and was rapidly activated by nitroreductase with large "turn on" fluorescence; thus, it is the preferred choice for translation towards in vivo applications.
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Affiliation(s)
- Janeala J. Morsby
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN, 46556, USA
| | - Kirk M. Atkinson
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN, 46556, USA
| | - Sai Shradha Reddy Kommidi
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN, 46556, USA
| | - Tristan Freel
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN, 46556, USA
- Department of Biochemistry and Molecular Biology, University of Chicago, 5841 S Maryland Avenue, Chicago, IL, 60637, USA
| | - Hana Janeková
- Department of Chemistry, University of Zurich, Winterthurestrasse 190, CH-8057, Zurich, Switzerland
| | - Peter Štacko
- Department of Chemistry, University of Zurich, Winterthurestrasse 190, CH-8057, Zurich, Switzerland
| | - Bradley D. Smith
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN, 46556, USA
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Synthesis of Holmium-Oxide Nanoparticles for Near-Infrared Imaging and Dye-Photodegradation. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27113522. [PMID: 35684461 PMCID: PMC9181859 DOI: 10.3390/molecules27113522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/05/2022] [Accepted: 05/26/2022] [Indexed: 11/17/2022]
Abstract
The development of multifunctional nanomaterials has received growing research interest, thanks to its ability to combine multiple properties for severing highly demanding purposes. In this work, holmium oxide nanoparticles are synthesized and characterized by various tools including XRD, XPS, and TEM. These nanoparticles are found to emit near-infrared fluorescence (800-1100 nm) under a 785 nm excitation source. Imaging of the animal tissues was demonstrated, and the maximum imaging depth was found to be 2.2 cm. The synthesized nanoparticles also show the capability of facilitating dye (fluorescein sodium salt and rhodamine 6G) degradation under white light irradiation. The synthesized holmium oxide nanoparticles are envisioned to be useful for near-infrared tissue imaging and dye-degradation.
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Shrivastava S, Arya R, Kim KK, Lee NE. A quorum-based fluorescent probe for imaging pathogenic bacteria. J Mater Chem B 2022; 10:4491-4500. [DOI: 10.1039/d2tb00247g] [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
Imaging of bacterial infections can be used for a wide range of investigations, including diagnosis and pathogenesis of infections, and molecular probes targeting biological processes during infection have been used...
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8
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Wang Z, Xing B. Small-molecule fluorescent probes: big future for specific bacterial labeling and infection detection. Chem Commun (Camb) 2021; 58:155-170. [PMID: 34882159 DOI: 10.1039/d1cc05531c] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Bacterial infections remain a global healthcare problem that is particularly attributed to the spread of antibiotic resistance and the evolving pathogenicity. Accurate and swift approaches for infection diagnosis are urgently needed to facilitate antibiotic stewardship and effective medical treatment. Direct optical imaging for specific bacterial labeling and infection detection offers an attractive prospect of precisely monitoring the infectious disease status and therapeutic response in real time. This feature article focuses on the recent advances of small-molecule probes developed for fluorescent imaging of bacteria and infection, which covers the probe design, responsive mechanisms and representative applications. In addition, the perspective and challenges to advance small-molecule fluorescent probes in the field of rapid drug-resistant bacterial detection and clinical diagnosis of bacterial infections are discussed. We envision that the continuous advancement and clinical translations of such a technique will have a strong impact on future anti-infective medicine.
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Affiliation(s)
- Zhimin Wang
- Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China.
| | - Bengang Xing
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 637371, Singapore. .,School of Chemical & Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
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9
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Weng J, Wang Y, Zhang Y, Ye D. An Activatable Near-Infrared Fluorescence Probe for in Vivo Imaging of Acute Kidney Injury by Targeting Phosphatidylserine and Caspase-3. J Am Chem Soc 2021; 143:18294-18304. [PMID: 34672197 DOI: 10.1021/jacs.1c08898] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Renal-clearable and target-responsive near-infrared (NIR) fluorescent imaging probes have been promising for in vivo diagnosis of acute kidney injury (AKI). However, designing an imaging probe that is renal-clearable and concurrently responsive toward multiple molecular targets to facilitate early detection of AKI with improved sensitivity and specificity is challenging. Herein, by leveraging the receptor-mediated binding and retention effect along with enzyme-triggered fluorescence activation, we design and synthesize an activatable small-molecule NIR fluorescent probe (1-DPA2) using a "one-pot sequential click reaction" approach. 1-DPA2 can target both the externalized phosphatidylserine (PS) and active caspase-3 (Casp-3), two essential biomarkers of apoptosis, producing enhanced 808 nm NIR fluorescence and a high signal-to-background ratio (SBR) amenable to detecting the onset of cisplatin-induced AKI in mice as early as 24 h post-treatment with cisplatin. We not only monitor the gradual activation of Casp-3 in the kidney of mice upon AKI progression but also can report on the progressive recovery of kidney functions in AKI mice following N-acetyl-l-cysteine (NAC) therapy via real-time fluorescence imaging by 1-DPA2. This study demonstrates the ability of 1-DPA2 for longitudinal monitoring of renal cell apoptosis by concurrently targeting PS externalization and Casp-3 activation, which is efficient for early diagnosis of AKI and useful for prediction of potential drug nephrotoxicity as well as in vivo screening of anti-AKI drugs' efficacy.
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Affiliation(s)
- Jianhui Weng
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing 210023, China
| | - Yuqi Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing 210023, China
| | - Yan Zhang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing 210023, China
| | - Deju Ye
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing 210023, China
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Fei G, Ma S, Wang C, Chen T, Li Y, Liu Y, Tang B, James TD, Chen G. Imaging strategies using cyanine probes and materials for biomedical visualization of live animals. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214134] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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11
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Simultaneous exposure to intracellular and extracellular photosensitizers for the treatment of Staphylococcus aureus infections. Antimicrob Agents Chemother 2021; 65:e0091921. [PMID: 34516248 DOI: 10.1128/aac.00919-21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Staphylococcus aureus is a serious threat to public health due to the rise of antibiotic resistance in this organism, which can prolong or exacerbate skin and soft tissue infections (SSTIs). Methicillin-resistant S. aureus is a Gram-positive bacterium and a leading cause of SSTIs. As such, many efforts are underway to develop therapies that target essential biological processes in S. aureus. Antimicrobial photodynamic therapy is effective alternative to antibiotics, therefore we developed an approach to simultaneously expose S. aureus to intracellular and extracellular photoactivators. A near infrared photosensitizer was conjugated to human monoclonal antibodies (mAbs) that target the S. aureus Isd heme acquisition proteins. Additionally, the compound VU0038882 was developed to increase photoactivatable porphyrins within the cell. Combinatorial PDT treatment of drug-resistant S. aureus exposed to VU0038882 and conjugated anti-Isd mAbs proved to be an effective antibacterial strategy in vitro and in a murine model of SSTIs.
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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: 34] [Impact Index Per Article: 11.3] [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.
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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
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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
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14
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Recent Progress in the Molecular Imaging of Tumor-Treating Bacteria. Nucl Med Mol Imaging 2021; 55:7-14. [PMID: 33643484 DOI: 10.1007/s13139-021-00689-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 01/13/2021] [Accepted: 01/20/2021] [Indexed: 12/20/2022] Open
Abstract
Bacterial cancer therapy (BCT) approaches have been extensively investigated because bacteria can show unique features of strong tropism for cancer, proliferation inside tumors, and antitumor immunity, while bacteria are also possible agents for drug delivery. Despite the rapidly increasing number of preclinical studies using BCT to overcome the limitations of conventional cancer treatments, very few BCT studies have advanced to clinical trials. In patients undergoing BCT, the precise localization and quantification of bacterial density in different body locations is important; however, most clinical trials have used subjective clinical signs and invasive sampling to confirm bacterial colonization. There is therefore a need to improve the visualization of bacterial densities using noninvasive and repetitive in vivo imaging techniques that can facilitate the clinical translation of BCT. In vivo optical imaging techniques using bioluminescence and fluorescence, which are extensively employed to image the therapeutic process of BCT in small animal research, are hard to apply to the human body because of their low penetrative power. Thus, new imaging techniques need to be developed for clinical trials. In this review, we provide an overview of the various in vivo bacteria-specific imaging techniques available for visualizing tumor-treating bacteria in BCT studies.
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15
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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]
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16
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Kumar N, Roopa, Bhalla V, Kumar M. Beyond zinc coordination: Bioimaging applications of Zn(II)-complexes. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213550] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Affiliation(s)
- Arundhati Nag
- Carlson School of Chemistry and Biochemistry Clark University Worcester MA 01610 Phone: 15084213897 Fax: 15087937117
| | - Samir Das
- Carlson School of Chemistry and Biochemistry Clark University Worcester MA 01610
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18
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Cabral AD, Rafiei N, de Araujo ED, Radu TB, Toutah K, Nino D, Murcar-Evans BI, Milstein JN, Kraskouskaya D, Gunning PT. Sensitive Detection of Broad-Spectrum Bacteria with Small-Molecule Fluorescent Excimer Chemosensors. ACS Sens 2020; 5:2753-2762. [PMID: 32803944 DOI: 10.1021/acssensors.9b02490] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Antibiotic resistance is a major problem for world health, triggered by the unnecessary usage of broad-spectrum antibiotics on purportedly infected patients. Current clinical standards require lengthy protocols for the detection of bacterial species in sterile physiological fluids. In this work, a class of small-molecule fluorescent chemosensors termed ProxyPhos was shown to be capable of rapid, sensitive, and facile detection of broad-spectrum bacteria. The sensors act via a turn-on fluorescent excimer mechanism, where close-proximity binding of multiple sensor units amplifies a red shift emission signal. ProxyPhos sensors were able to detect down to 10 CFUs of model strains by flow cytometry assays and showed selectivity over mammalian cells in a bacterial coculture through fluorescence microscopy. The studies reveal that the zinc(II)-chelates cyclen and cyclam are novel and effective binding units for the detection of both Gram-negative and Gram-positive bacterial strains. Mode of action studies revealed that the chemosensors detect Gram-negative and Gram-positive strains with two distinct mechanisms. Preliminary studies applying ProxyPhos sensors to sterile physiological fluids (cerebrospinal fluid) in flow cytometry assays were successful. The results suggest that ProxyPhos sensors can be developed as a rapid, inexpensive, and robust tool for the "yes-no" detection of broad-spectrum bacteria in sterile fluids.
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Affiliation(s)
- Aaron D. Cabral
- Department of Chemical & Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road North, Mississauga, Ontario L5L 1C6, Canada
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Nafiseh Rafiei
- Department of Chemical & Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road North, Mississauga, Ontario L5L 1C6, Canada
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada
| | - Elvin D. de Araujo
- Department of Chemical & Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road North, Mississauga, Ontario L5L 1C6, Canada
| | - Tudor B. Radu
- Department of Chemical & Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road North, Mississauga, Ontario L5L 1C6, Canada
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Krimo Toutah
- Department of Chemical & Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road North, Mississauga, Ontario L5L 1C6, Canada
| | - Daniel Nino
- Department of Chemical & Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road North, Mississauga, Ontario L5L 1C6, Canada
- Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada
| | - Bronte I. Murcar-Evans
- Department of Chemical & Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road North, Mississauga, Ontario L5L 1C6, Canada
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Joshua N. Milstein
- Department of Chemical & Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road North, Mississauga, Ontario L5L 1C6, Canada
- Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada
| | - Dziyana Kraskouskaya
- Department of Chemical & Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road North, Mississauga, Ontario L5L 1C6, Canada
| | - Patrick T. Gunning
- Department of Chemical & Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road North, Mississauga, Ontario L5L 1C6, Canada
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
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19
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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.
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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
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20
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Zhang D, Jin Q, Jiang C, Gao M, Ni Y, Zhang J. Imaging Cell Death: Focus on Early Evaluation of Tumor Response to Therapy. Bioconjug Chem 2020; 31:1025-1051. [PMID: 32150392 DOI: 10.1021/acs.bioconjchem.0c00119] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Cell death plays a prominent role in the treatment of cancer, because most anticancer therapies act by the induction of cell death including apoptosis, necrosis, and other pathways of cell death. Imaging cell death helps to identify treatment responders from nonresponders and thus enables patient-tailored therapy, which will increase the likelihood of treatment response and ultimately lead to improved patient survival. By taking advantage of molecular probes that specifically target the biomarkers/biochemical processes of cell death, cell death imaging can be successfully achieved. In recent years, with the increased understanding of the molecular mechanism of cell death, a variety of well-defined biomarkers/biochemical processes of cell death have been identified. By targeting these established cell death biomarkers/biochemical processes, a set of molecular imaging probes have been developed and evaluated for early monitoring treatment response in tumors. In this review, we mainly present the recent advances in identifying useful biomarkers/biochemical processes for both apoptosis and necrosis imaging and in developing molecular imaging probes targeting these biomarkers/biochemical processes, with a focus on their application in early evaluation of tumor response to therapy.
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Affiliation(s)
- Dongjian Zhang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, P.R. China.,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing 210028, P.R. China
| | - Qiaomei Jin
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, P.R. China.,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing 210028, P.R. China
| | - Cuihua Jiang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, P.R. China.,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing 210028, P.R. China
| | - Meng Gao
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, P.R. China.,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing 210028, P.R. China
| | - Yicheng Ni
- Theragnostic Laboratory, Campus Gasthuisberg, KU Leuven, Leuven 3000, Belgium
| | - Jian Zhang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, P.R. China.,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing 210028, P.R. China
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21
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Maltais R, Ngueta Djiemeny A, Roy J, Barbeau X, Lambert JP, Poirier D. Design and synthesis of dansyl-labeled inhibitors of steroid sulfatase for optical imaging. Bioorg Med Chem 2020; 28:115368. [PMID: 32122754 DOI: 10.1016/j.bmc.2020.115368] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 01/28/2020] [Accepted: 02/03/2020] [Indexed: 02/06/2023]
Abstract
Steroid sulfatase (STS) is an important enzyme regulating the conversion of sulfated steroids into their active hydroxylated forms. Notably, the inhibition of STS has been shown to decrease the levels of active estrogens and was translated into clinical trials for the treatment of breast cancer. Based on quantitative structure-activity relationship (QSAR) and molecular modeling studies, we herein report the design of fluorescent inhibitors of STS by adding a dansyl group on an estrane scaffold. Synthesis of 17α-dansylaminomethyl-estradiol (7) and its sulfamoylated analog 8 were achieved from estrone in 5 and 6 steps, respectively. Inhibition assays on HEK-293 cells expressing exogenous STS revealed a high level of inhibition for compound 7 (IC50 = 69 nM), a value close to the QSAR model prediction (IC50 = 46 nM). As an irreversible inhibitor, sulfamate 8 led to an even more potent inhibition in the low nanomolar value (IC50 = 2.1 nM). In addition, we show that the potent STS inhibitor 8 can be employed as an optical imaging tool to investigate intracellular enzyme sub-localization as well as inhibitory behavior. As a result, confocal microscopy analysis confirmed good penetration of the STS fluorescent inhibitor 8 in cells and its localization in the endoplasmic reticulum where STS is localized.
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Affiliation(s)
- René Maltais
- Laboratory of Medicinal Chemistry, Endocrinology and Nephrology Unit, CHU de Québec - Research Center, Québec, QC, Canada
| | - Adrien Ngueta Djiemeny
- Laboratory of Medicinal Chemistry, Endocrinology and Nephrology Unit, CHU de Québec - Research Center, Québec, QC, Canada
| | - Jenny Roy
- Laboratory of Medicinal Chemistry, Endocrinology and Nephrology Unit, CHU de Québec - Research Center, Québec, QC, Canada
| | - Xavier Barbeau
- Laboratory of Medicinal Chemistry, Endocrinology and Nephrology Unit, CHU de Québec - Research Center, Québec, QC, Canada
| | - Jean-Philippe Lambert
- Department of Molecular Medicine, Faculty of Medicine, Université Laval, Québec, QC, Canada
| | - Donald Poirier
- Laboratory of Medicinal Chemistry, Endocrinology and Nephrology Unit, CHU de Québec - Research Center, Québec, QC, Canada; Department of Molecular Medicine, Faculty of Medicine, Université Laval, Québec, QC, Canada.
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22
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Wang LL, Tu YK, Yao H, Jiang W. 2,3-Dibutoxynaphthalene-based tetralactam macrocycles for recognizing precious metal chloride complexes. Beilstein J Org Chem 2019; 15:1460-1467. [PMID: 31354862 PMCID: PMC6633862 DOI: 10.3762/bjoc.15.146] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Accepted: 06/27/2019] [Indexed: 01/07/2023] Open
Abstract
Two new tetralactam macrocycles with 2,3-dibutoxynaphthalene groups as sidewalls have been synthesized and characterized. The macrocycle containing isophthalamide bridges can bind square-planar chloride coordination complexes of gold(III), platinum(II), and palladium(II) in CDCl3, while the macrocycle with 2,6-pyridine dicarboxamide bridging units cannot. This may be due to the shrunken cavity caused by intramolecular hydrogen bonds in the latter tetralactam macrocycle. The binding of the isophthalamide-based macrocycle is mainly driven by hydrogen bonds and electrostatic interactions. This naphthalene-based macrocycle has similar binding affinities to all the three abovementioned precious metal chloride complexes. This is in contrast to the fact that the tetralactam macrocycle with anthracene as the sidewalls only show good binding affinities to AuCl4−. The superior binding to all three complexes may be due to the conformational diversity of the naphthalene-based macrocycle, which make it conformationally adaptive to maximize the binding affinities. In addition, the macrocycle shows fluorescent quenching when adding the chloride metal complexes in its solution and may be used as a fluorescent sensor for the detection of these coordination complexes.
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Affiliation(s)
- Li-Li Wang
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Xueyuan Boulevard 1088, Shenzhen 518055, China
| | - Yi-Kuan Tu
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Xueyuan Boulevard 1088, Shenzhen 518055, China
| | - Huan Yao
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Xueyuan Boulevard 1088, Shenzhen 518055, China
| | - Wei Jiang
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Xueyuan Boulevard 1088, Shenzhen 518055, China
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23
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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.
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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.
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24
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Zhao X, Chen Y, Niu G, Gu D, Wang J, Cao Y, Yin Y, Li X, Ding D, Xi R, Meng M. Photostable pH-Sensitive Near-Infrared Aggregation-Induced Emission Luminogen for Long-Term Mitochondrial Tracking. ACS APPLIED MATERIALS & INTERFACES 2019; 11:13134-13139. [PMID: 30901189 DOI: 10.1021/acsami.9b02228] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Mitochondria are crucial in the process of oxidative metabolism and apoptosis. Their morphology is greatly associated with the development of certain diseases. For specific and long-term imaging of mitochondrial morphology, we synthesized a new mitochondria-targeted near-infrared (NIR) fluorescent probe (TPE-Xan-In) by incorporating TPE with a NIR merocyanine skeleton (Xan-In). TPE-Xan-In displayed both absorption (660 nm) and emission peaks (743 nm) in the NIR region. Moreover, it showed aggregation-induced emission properties at neutral pH and specifically illuminated mitochondria with good biocompatibility, superior photostability, and high tolerance to mitochondrial membrane potential changes. With a pH-responsive unit, hydroxyl xanthene (Xan), the probe exhibited a pH-sensitive fluorescence emission in the range of pH 4.0-7.0, which indicated its potential in long-term tracking of pH and morphology changes of mitochondria in the biomedical research studies.
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Affiliation(s)
- Xiujie Zhao
- College of Pharmacy, State Key Laboratory of Medicinal Chemical Biology and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Tianjin 300353 , China
| | - Yun Chen
- College of Pharmacy, State Key Laboratory of Medicinal Chemical Biology and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Tianjin 300353 , China
| | - Guiyu Niu
- College of Pharmacy, State Key Laboratory of Medicinal Chemical Biology and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Tianjin 300353 , China
| | - Dening Gu
- College of Pharmacy, State Key Laboratory of Medicinal Chemical Biology and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Tianjin 300353 , China
| | - Jianning Wang
- College of Pharmacy, State Key Laboratory of Medicinal Chemical Biology and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Tianjin 300353 , China
| | - Yanmei Cao
- College of Pharmacy, State Key Laboratory of Medicinal Chemical Biology and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Tianjin 300353 , China
| | - Yongmei Yin
- College of Pharmacy, State Key Laboratory of Medicinal Chemical Biology and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Tianjin 300353 , China
| | - Xiaogang Li
- Peking Union Medical College Hospital , Peking Union Medical College and Chinese Academy of Medical Sciences , Beijing 100730 , China
| | - Dan Ding
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Bioactive Materials, Ministry of Education, and College of Life Sciences , Nankai University , Tianjin 300071 , China
| | - Rimo Xi
- College of Pharmacy, State Key Laboratory of Medicinal Chemical Biology and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Tianjin 300353 , China
| | - Meng Meng
- College of Pharmacy, State Key Laboratory of Medicinal Chemical Biology and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Tianjin 300353 , China
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25
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Welling MM, Hensbergen AW, Bunschoten A, Velders AH, Scheper H, Smits WK, Roestenberg M, van Leeuwen FWB. Fluorescent imaging of bacterial infections and recent advances made with multimodal radiopharmaceuticals. Clin Transl Imaging 2019. [DOI: 10.1007/s40336-019-00322-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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26
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Mazzoni F, Müller C, DeAssis J, Lew D, Leevy WM, Finnemann SC. Non-invasive in vivo fluorescence imaging of apoptotic retinal photoreceptors. Sci Rep 2019; 9:1590. [PMID: 30733587 PMCID: PMC6367443 DOI: 10.1038/s41598-018-38363-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 12/27/2018] [Indexed: 12/05/2022] Open
Abstract
Phosphatidylserine externalization is an early molecular signature for apoptosis. In many retinal degenerative diseases, photoreceptor neurons die by apoptosis. Here, we report utility of the phosphatidylserine-binding conjugate of Bis(zinc(II)-dipicolylamine (Zn-DPA) with Texas-red (PSVue-550) in transiently labeling apoptotic photoreceptors in living pigmented or albino rats and mice with retinal degeneration. Applying PSVue-550 as eyedrop is non-toxic and eliminates need for intraocular injection. PSVue-550 fluorescence specifically and transiently labeling dying retinal photoreceptors is detectable in anesthetized animals using standard retinal or whole small animal imaging systems. Importantly, prior PSVue-550 eyedrop administration and imaging does not affect repeat testing. Altogether, our results establish PSVue-550 imaging as a completely non-invasive method that provides the opportunity to longitudinally monitor retinal photoreceptor cell death in preclinical studies.
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Affiliation(s)
- Francesca Mazzoni
- Department of Biological Sciences, Center for Cancer, Genetic Diseases and Gene Regulation, Fordham University, Bronx, NY, 10458, USA
| | - Claudia Müller
- Department of Biological Sciences, Center for Cancer, Genetic Diseases and Gene Regulation, Fordham University, Bronx, NY, 10458, USA
| | - Jonathan DeAssis
- Department of Biological Sciences, Center for Cancer, Genetic Diseases and Gene Regulation, Fordham University, Bronx, NY, 10458, USA
| | - Deborah Lew
- Department of Biological Sciences, Center for Cancer, Genetic Diseases and Gene Regulation, Fordham University, Bronx, NY, 10458, USA
| | - W Matthew Leevy
- Department of Biological Sciences, 100 Galvin Life Science Center, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Silvia C Finnemann
- Department of Biological Sciences, Center for Cancer, Genetic Diseases and Gene Regulation, Fordham University, Bronx, NY, 10458, USA.
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27
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Tsuchido Y, Horiuchi R, Hashimoto T, Ishihara K, Kanzawa N, Hayashita T. Rapid and Selective Discrimination of Gram-Positive and Gram-Negative Bacteria by Boronic Acid-Modified Poly(amidoamine) Dendrimer. Anal Chem 2019; 91:3929-3935. [PMID: 30652471 DOI: 10.1021/acs.analchem.8b04870] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
There is an urgent need to develop a rapid and selective method for the detection of bacteria because delayed diagnosis and the overuse of antibiotics have triggered drug resistance in bacteria. To this end, we prepared boronic acid-modified poly(amidoamine) generation 4 (B-PAMAM(G4)) dendrimer as cross-linking molecules that form aggregates with bacteria. Within 5 min of adding B-PAMAM(G4) dendrimer solution to a bacterial suspension, large aggregates were observed. Interestingly, the aggregate formation with various bacteria was pH-dependent. In basic pH, both Gram-positive and Gram-negative bacteria formed aggregates, but in neutral pH, only Gram-positive bacteria formed aggregates. We revealed that this bacteria-selective aggregation involved the bacterial surface recognition of the phenylboronic acid moiety of B-PAMAM(G4) dendrimer. In addition, we demonstrated that the spherical structure of B-PAMAM(G4) was one of the important factors for the formation of large aggregates. The aggregation was also observed in the presence of ≤10 mM fructose. B-PAMAM(G4) dendrimer is expected to be a powerful tool for the rapid and selective discrimination between Gram-positive and Gram-negative bacteria.
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Affiliation(s)
- Yuji Tsuchido
- Department of Materials and Life Sciences, Faculty of Science and Technology , Sophia University , 7-1 Kioi-cho , Chiyoda-ku , Tokyo 102-8554 , Japan
| | - Ryosuke Horiuchi
- Department of Materials and Life Sciences, Faculty of Science and Technology , Sophia University , 7-1 Kioi-cho , Chiyoda-ku , Tokyo 102-8554 , Japan
| | - Takeshi Hashimoto
- Department of Materials and Life Sciences, Faculty of Science and Technology , Sophia University , 7-1 Kioi-cho , Chiyoda-ku , Tokyo 102-8554 , Japan
| | - Kanako Ishihara
- Cooperative Department of Veterinary Medicine, Faculty of Agriculture , Tokyo University of Agriculture and Technology , 3-5-8 Saiwai-cho , Fuchu-shi , Tokyo 183-8509 , Japan
| | - Nobuyuki Kanzawa
- Department of Materials and Life Sciences, Faculty of Science and Technology , Sophia University , 7-1 Kioi-cho , Chiyoda-ku , Tokyo 102-8554 , Japan
| | - Takashi Hayashita
- Department of Materials and Life Sciences, Faculty of Science and Technology , Sophia University , 7-1 Kioi-cho , Chiyoda-ku , Tokyo 102-8554 , Japan
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Kendall LV, Owiny JR, Dohm ED, Knapek KJ, Lee ES, Kopanke JH, Fink M, Hansen SA, Ayers JD. Replacement, Refinement, and Reduction in Animal Studies With Biohazardous Agents. ILAR J 2019; 59:177-194. [DOI: 10.1093/ilar/ily021] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 06/11/2018] [Indexed: 12/17/2022] Open
Abstract
Abstract
Animal models are critical to the advancement of our knowledge of infectious disease pathogenesis, diagnostics, therapeutics, and prevention strategies. The use of animal models requires thoughtful consideration for their well-being, as infections can significantly impact the general health of an animal and impair their welfare. Application of the 3Rs—replacement, refinement, and reduction—to animal models using biohazardous agents can improve the scientific merit and animal welfare. Replacement of animal models can use in vitro techniques such as cell culture systems, mathematical models, and engineered tissues or invertebrate animal hosts such as amoeba, worms, fruit flies, and cockroaches. Refinements can use a variety of techniques to more closely monitor the course of disease. These include the use of biomarkers, body temperature, behavioral observations, and clinical scoring systems. Reduction is possible using advanced technologies such as in vivo telemetry and imaging, allowing longitudinal assessment of animals during the course of disease. While there is no single method to universally replace, refine, or reduce animal models, the alternatives and techniques discussed are broadly applicable and they should be considered when infectious disease animal models are developed.
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Affiliation(s)
- Lon V Kendall
- Department of Microbiology, Immunology and Pathology, and Laboratory Animal Resources, Colorado State University, Fort Collins, Colorado
| | - James R Owiny
- Laboratory Animal Resources, Colorado State University, Fort Collins, Colorado
| | - Erik D Dohm
- Animal Resources Program, University of Alabama, Birmingham, Alabama
| | - Katie J Knapek
- Comparative Medicine Training Program, Colorado State University, Fort Collins, Colorado
| | - Erin S Lee
- Animal Resource Center, University of Texas Medical Branch, Galveston, Texas
| | - Jennifer H Kopanke
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado
| | - Michael Fink
- Department of Veterinary Pathobiology, University of Missouri, Columbia, Missouri
| | - Sarah A Hansen
- Office of Animal Resources, University of Iowa, Iowa City, Iowa
| | - Jessica D Ayers
- Laboratory Animal Resources, Colorado State University, Fort Collins, Colorado
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29
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Lee MH, Wiedman G, Park S, Mustaev A, Zhao Y, Perlin DS. A novel, tomographic imaging probe for rapid diagnosis of fungal keratitis. Med Mycol 2018; 56:796-802. [PMID: 29228372 PMCID: PMC6186012 DOI: 10.1093/mmy/myx125] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 10/20/2017] [Indexed: 11/25/2022] Open
Abstract
Fungal keratitis is a leading cause of ocular morbidity and blindness in developing countries. Diagnosing fungal keratitis currently relies on a comparative evaluation of corneal biopsy or scraping using a direct microscopy and culture results. These methods not only carry the risk of developing complications due to the invasive tissue sampling but also are largely limited by diagnostic speed and accuracy, making it difficult to initiate timely appropriate antifungal therapy. Therefore, rapid and noninvasive diagnostic tools are a pressing need for improved outcomes for fungal keratitis. Taking advantage of the highly specific fungal cell targeting properties of caspofungin, we have developed a fluorescent chemical probe with high selectivity against fungal pathogens. Utilizing fluorescence imaging technology, we have demonstrated a highly specific and sensitive detection of Aspergillus in a fungal keratitis model in mice as early as 5 min post-topical application of the probe. Our results indicate that a fluorescence-mediated platform can be used as a rapid (<10 min) alternative to conventional methods for detecting Aspergillus, and potentially other fungi, in fungal infections of the cornea.
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Affiliation(s)
- Min Hee Lee
- Public Health Research Institute, New Jersey Medical School, Rutgers, Newark, NJ, USA
| | - Gregory Wiedman
- Public Health Research Institute, New Jersey Medical School, Rutgers, Newark, NJ, USA
| | - Steven Park
- Public Health Research Institute, New Jersey Medical School, Rutgers, Newark, NJ, USA
| | - Arkady Mustaev
- Public Health Research Institute, New Jersey Medical School, Rutgers, Newark, NJ, USA
| | - Yanan Zhao
- Public Health Research Institute, New Jersey Medical School, Rutgers, Newark, NJ, USA
| | - David S Perlin
- Public Health Research Institute, New Jersey Medical School, Rutgers, Newark, NJ, USA
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30
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Cai Q, Fei Y, Hu L, Huang Z, Li LL, Wang H. Chemotaxis-Instructed Intracellular Staphylococcus aureus Infection Detection by a Targeting and Self-Assembly Signal-Enhanced Photoacoustic Probe. NANO LETTERS 2018; 18:6229-6236. [PMID: 30153415 DOI: 10.1021/acs.nanolett.8b02286] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Intracellular invasion and the survival of Staphylococcus aureus in phagocytic cells has been regarded as one of the mechanisms that leads to the treatment failure of S. aureus infection and potential antibiotic resistance. The detection of infected phagocytic cells plays an important role in guiding antibiotic treatment and in reducing drug resistance. The development of a sensitive and specific imaging probe to visualize the intracellular bacteria is quite challenging. In this work, we report a photoacoustic agent (MPC) that is able to detect intracellular S. aureus infection through a dynamic process, including (i) active targeting and internalization into macrophage cells, (ii) specific molecular tailoring by caspase-1 in infected macrophage cells, and (iii) enhancement of the photoacoustic (PA) signal owing to molecular self-assembly. The PA signal per area of the "stimuli-induced assembly" agent (MPC) increases more than 2-fold over that of the active targeting control agent (MPSC). Finally, based on this approach, the average PA signal in the infected site is enhanced by approximately 2.6-fold over that of the control site. We envision that this PA contrast agent may provide a new approach for the selective and sensitive diagnosis of an intracellular bacterial infection.
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Affiliation(s)
- Qian Cai
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety , National Center for Nanoscience and Technology (NCNST) , No. 11 Beiyitiao, Zhongguancun , Beijing , 100190 , China
- College of Life Science and Bioengineering , Beijing University of Technology , Beijing 100124 , China
| | - Yue Fei
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety , National Center for Nanoscience and Technology (NCNST) , No. 11 Beiyitiao, Zhongguancun , Beijing , 100190 , China
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases , Pharmaceutical University , Nanjing 210009 , China
| | - Liming Hu
- College of Life Science and Bioengineering , Beijing University of Technology , Beijing 100124 , China
| | - Zhangjian Huang
- College of Life Science and Bioengineering , Beijing University of Technology , Beijing 100124 , China
| | - Li-Li Li
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety , National Center for Nanoscience and Technology (NCNST) , No. 11 Beiyitiao, Zhongguancun , Beijing , 100190 , China
| | - Hao Wang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety , National Center for Nanoscience and Technology (NCNST) , No. 11 Beiyitiao, Zhongguancun , Beijing , 100190 , China
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31
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Ordonez AA, Jain SK. Pathogen-Specific Bacterial Imaging in Nuclear Medicine. Semin Nucl Med 2018. [DOI: 10.1053/j.semnuclmed.2017.11.003
expr 890398765 + 809902709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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Abstract
When serious infections are suspected, patients are often treated empirically with broad-spectrum antibiotics while awaiting results that provide information on the bacterial class and species causing the infection, as well as drug susceptibilities. For deep-seated infections, these traditional diagnostic techniques often rely on tissue biopsies to obtain clinical samples which can be expensive, dangerous, and has the potential of sampling bias. Moreover, these procedures and results can take several days and may not always provide reliable information. This combination of time and effort required for proper antibiotic selection has become a barrier leading to indiscriminate broad-spectrum antibiotic use. Exposure to nosocomial infections and indiscriminate use of broad-spectrum antibiotics are responsible for promoting bacterial drug-resistance leading to substantial morbidity and mortality, especially in hospitalized and immunosuppressed patients. Therefore, early diagnosis of infection and targeted antibiotic treatments are urgently needed to reduce morbidity and mortality caused by bacterial infections worldwide. Reliable pathogen-specific bacterial imaging techniques have the potential to provide early diagnosis and guide antibiotic treatments.
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Affiliation(s)
- Alvaro A Ordonez
- Center for Infection and Inflammation Imaging Research, Johns Hopkins University School of Medicine, Baltimore, MD; Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Sanjay K Jain
- Center for Infection and Inflammation Imaging Research, Johns Hopkins University School of Medicine, Baltimore, MD; Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD.
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33
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Fluorescent Antibiotics: New Research Tools to Fight Antibiotic Resistance. Trends Biotechnol 2018; 36:523-536. [PMID: 29478675 DOI: 10.1016/j.tibtech.2018.01.004] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 01/10/2018] [Accepted: 01/11/2018] [Indexed: 01/02/2023]
Abstract
Better understanding how multidrug-resistant (MDR) bacteria can evade current and novel antibiotics requires a better understanding of the chemical biology of antibiotic action. This necessitates using new tools and techniques to advance our knowledge of bacterial responses to antibiotics, ideally in live cells in real time, to selectively investigate bacterial growth, division, metabolism, and resistance in response to antibiotic challenge. In this review, we discuss the preparation and biological evaluation of fluorescent antibiotics, focussing on how these reporters and assay methods can help elucidate resistance mechanisms. We also examine the potential utility of such probes for real-time in vivo diagnosis of infections.
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34
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Gupta A, Das R, Tonga GY, Mizuhara T, Rotello VM. Charge-Switchable Nanozymes for Bioorthogonal Imaging of Biofilm-Associated Infections. ACS NANO 2018; 12:89-94. [PMID: 29244484 PMCID: PMC5846330 DOI: 10.1021/acsnano.7b07496] [Citation(s) in RCA: 109] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Early detection of biofilms is crucial for limiting infection-based damage. Imaging these biofilms is challenging: conventional imaging agents are unable to penetrate the dense matrix of the biofilm, and many imaging agents are susceptible to false positive/negative responses due to phenotypical mutations of the constituent microbes. We report the creation of pH-responsive nanoparticles with embedded transition metal catalysts (nanozymes) that effectively target the acidic microenvironment of biofilms. These pH-switchable nanozymes generate imaging agents through bioorthogonal activation of profluorophores inside biofilms. The specificity of these nanozymes for imaging biofilms in complex biosystems was demonstrated using coculture experiments.
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Affiliation(s)
- Akash Gupta
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003, United States
| | - Riddha Das
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003, United States
| | - Gulen Yesilbag Tonga
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003, United States
| | - Tsukasa Mizuhara
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003, United States
| | - Vincent M. Rotello
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003, United States
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35
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Liu P, Zhou Y, Guo M, Yang S, Félix O, Martel D, Qiu Y, Ma Y, Decher G. Fluorescence-enhanced bio-detection platforms obtained through controlled "step-by-step" clustering of silver nanoparticles. NANOSCALE 2018; 10:848-855. [PMID: 29261202 DOI: 10.1039/c7nr07486g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Metal nanoparticle coatings are widely employed as fluorescence-enhanced platforms for high-throughput biological detection; however, complex manufacturing technologies and stringent fabrication procedures hinder their development for use in bioassays. Here, we present the preparation of fluorescence-based bioassay platforms using spray-assisted step-by-step assembly of silver nanoparticles (Ag NPs) and poly(diallyldimethylammonium chloride) (PDDA). This approach allowed us to control the density and the degree of aggregation of Ag NPs on large surfaces which are prerequisites for the development of bioassay platforms with a substantial fluorescence enhancement. After one assembly cycle (1-Ag platform) the adsorbed particles are not forming aggregates or ones composed of very few particles which, as expected, led to poor fluorescence enhancement (1.1) for cyanine 5. Further assembly steps induce the clustering of Ag NPs by multiple electrostatic interactions between PDDA and Ag NPs and thus increase the number of nanoparticles per aggregate in a controlled way. We observed that the nanoparticle island growth takes place first mainly in the plane (2D) and then in the plane and in the third dimension and that the aggregate morphology (2D versus 3D) strongly affects the plasmonic fluorescence enhancement of the fluorescent dye. A substantial fluorescence enhancement (12.3) was measured for a Ag NP platform obtained after twelve assembly cycles. This result is within the ballpark of values reported in the literature for bioassay platforms using metal nanoparticles and opens the route towards the preparation of fluorescence-based bioassay platforms on the large scale.
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Affiliation(s)
- Panpan Liu
- Key Laboratory of Textile Science and Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, P. R. China.
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36
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The Self-assembly of Cyanine Dyes for Biomedical Application In Vivo. IN VIVO SELF-ASSEMBLY NANOTECHNOLOGY FOR BIOMEDICAL APPLICATIONS 2018. [DOI: 10.1007/978-981-10-6913-0_2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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37
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Mesoporous silica for drug delivery: Interactions with model fluorescent lipid vesicles and live cells. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 178:19-26. [DOI: 10.1016/j.jphotobiol.2017.10.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 10/13/2017] [Accepted: 10/25/2017] [Indexed: 01/25/2023]
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38
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Liu YW, Shia KS, Wu CH, Liu KL, Yeh YC, Lo CF, Chen CT, Chen YY, Yeh TK, Chen WH, Jan JJ, Huang YC, Huang CL, Fang MY, Gray BD, Pak KY, Hsu TA, Huang KH, Tsou LK. Targeting Tumor Associated Phosphatidylserine with New Zinc Dipicolylamine-Based Drug Conjugates. Bioconjug Chem 2017; 28:1878-1892. [PMID: 28581724 DOI: 10.1021/acs.bioconjchem.7b00225] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A series of zinc(II) dipicolylamine (ZnDPA)-based drug conjugates have been synthesized to probe the potential of phosphatidylserine (PS) as a new antigen for small molecule drug conjugate (SMDC) development. Using in vitro cytotoxicity and plasma stability studies, PS-binding assay, in vivo pharmacokinetic studies, and maximum tolerated dose profiles, we provided a roadmap and the key parameters required for the development of the ZnDPA based drug conjugate. In particular, conjugate 24 induced tumor regression in the COLO 205 xenograft model and exhibited a more potent antitumor effect with a 70% reduction of cytotoxic payload compared to that of the marketed irinotecan when dosed at the same regimen. In addition to the validation of PS as an effective pharmacodelivery target for SMDC, our work also provided the foundation that, if applicable, a variety of therapeutic agents could be conjugated in the same manner to treat other PS-associated diseases.
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Affiliation(s)
- Yu-Wei Liu
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Kak-Shan Shia
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Chien-Huang Wu
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Kuan-Liang Liu
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Yu-Cheng Yeh
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Chen-Fu Lo
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Chiung-Tong Chen
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Yun-Yu Chen
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Teng-Kuang Yeh
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Wei-Han Chen
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Jiing-Jyh Jan
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Yu-Chen Huang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Chen-Lung Huang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Ming-Yu Fang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Brian D Gray
- Molecular Targeting Technologies, Inc. , West Chester, Pennsylvania 19380, United States
| | - Koon Y Pak
- Molecular Targeting Technologies, Inc. , West Chester, Pennsylvania 19380, United States
| | - Tsu-An Hsu
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Kuan-Hsun Huang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
| | - Lun K Tsou
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes , Miaoli 35053, Taiwan, ROC
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39
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Zhao Z, Yan R, Yi X, Li J, Rao J, Guo Z, Yang Y, Li W, Li YQ, Chen C. Bacteria-Activated Theranostic Nanoprobes against Methicillin-Resistant Staphylococcus aureus Infection. ACS NANO 2017; 11:4428-4438. [PMID: 28350437 DOI: 10.1021/acsnano.7b00041] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Despite numerous advanced imaging and sterilization techniques available nowadays, the sensitive in vivo diagnosis and complete elimination of drug-resistant bacterial infections remain big challenges. Here we report a strategy to design activatable theranostic nanoprobes against methicillin-resistant Staphylococcus aureus (MRSA) infections. This probe is based on silica nanoparticles coated with vancomycin-modified polyelectrolyte-cypate complexes (SiO2-Cy-Van), which is activated by an interesting phenomenon of bacteria-responsive dissociation of the polyelectrolyte from silica nanoparticles. Due to the aggregation of hydrophobic cypate fluorophores on silica nanoparticles to induce ground-state quenching, the SiO2-Cy-Van nanoprobes are nonfluorescent in aqueous environments. We demonstrate that MRSA can effectively pull out the vancomycin-modified polyelectrolyte-cypate complexes from silica nanoparticles and draw them onto their own surface, changing the state of cypate from off (aggregation) to on (disaggregation) and leading to in vitro MRSA-activated near-infrared fluorescence (NIRF) and photothermal elimination involving bacterial cell wall and membrane disruption. In vivo experiments show that this de novo-designed nanoprobe can selectively enable rapid (4 h postinjection) NIRF imaging with high sensitivity (105 colony-forming units) and efficient photothermal therapy (PTT) of MRSA infections in mice. Remarkably, the SiO2-Cy-Van nanoprobes can also afford a long-term tracking (16 days) of the development of MRSA infections, allowing real-time estimation of bacterial load in infected tissues and further providing a possible way to monitor the efficacy of antimicrobial treatment. The strategy of bacteria-activated polyelectrolyte dissociation from nanoparticles proposed in this work could also be used as a general method for the design and fabrication of bacteria-responsive functional nanomaterials that offer possibilities to combat drug-resistant bacterial infections.
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Affiliation(s)
- Zhiwei Zhao
- School of Radiation Medicine and Protection, Medical College of Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions , Suzhou 215123, China
| | - Rong Yan
- School of Radiation Medicine and Protection, Medical College of Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions , Suzhou 215123, China
| | - Xuan Yi
- School of Radiation Medicine and Protection, Medical College of Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions , Suzhou 215123, China
| | - Jingling Li
- School of Radiation Medicine and Protection, Medical College of Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions , Suzhou 215123, China
| | - Jiaming Rao
- School of Radiation Medicine and Protection, Medical College of Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions , Suzhou 215123, China
| | - Zhengqing Guo
- School of Radiation Medicine and Protection, Medical College of Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions , Suzhou 215123, China
| | - Yanmei Yang
- School of Radiation Medicine and Protection, Medical College of Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions , Suzhou 215123, China
| | - Weifeng Li
- School of Radiation Medicine and Protection, Medical College of Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions , Suzhou 215123, China
| | - Yong-Qiang Li
- School of Radiation Medicine and Protection, Medical College of Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions , Suzhou 215123, China
| | - Chunying Chen
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology of China , Beijing 100190, China
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40
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Zhou Y, Zhuang Y, Li X, Ågren H, Yu L, Ding J, Zhu L. Selective Dual-Channel Imaging on Cyanostyryl-Modified Azulene Systems with Unimolecularly Tunable Visible-Near Infrared Luminescence. Chemistry 2017. [DOI: 10.1002/chem.201700947 and 21=21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yunyun Zhou
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - Yaping Zhuang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - Xin Li
- Division of Theoretical Chemistry and Biology, School of Biotechnology; KTH Royal Institute of Technology; 10691 Stockholm Sweden
| | - Hans Ågren
- Division of Theoretical Chemistry and Biology, School of Biotechnology; KTH Royal Institute of Technology; 10691 Stockholm Sweden
| | - Lin Yu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - Jiandong Ding
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - Liangliang Zhu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science; Fudan University; Shanghai 200433 China
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41
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Zhou Y, Zhuang Y, Li X, Ågren H, Yu L, Ding J, Zhu L. Selective Dual-Channel Imaging on Cyanostyryl-Modified Azulene Systems with Unimolecularly Tunable Visible-Near Infrared Luminescence. Chemistry 2017; 23:7642-7647. [DOI: 10.1002/chem.201700947] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 03/27/2017] [Indexed: 12/27/2022]
Affiliation(s)
- Yunyun Zhou
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - Yaping Zhuang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - Xin Li
- Division of Theoretical Chemistry and Biology, School of Biotechnology; KTH Royal Institute of Technology; 10691 Stockholm Sweden
| | - Hans Ågren
- Division of Theoretical Chemistry and Biology, School of Biotechnology; KTH Royal Institute of Technology; 10691 Stockholm Sweden
| | - Lin Yu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - Jiandong Ding
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - Liangliang Zhu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science; Fudan University; Shanghai 200433 China
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42
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Wen F, Nie D, Hu K, Tang G, Yao S, Tang C. Semi-automatic synthesis and biodistribution of N-(2- 18F-fluoropropionyl)-bis(zinc (II)-dipicolylamine) ( 18F-FP-DPAZn2) for AD model imaging. BMC Med Imaging 2017; 17:27. [PMID: 28431519 PMCID: PMC5399867 DOI: 10.1186/s12880-017-0200-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 04/11/2017] [Indexed: 01/05/2023] Open
Abstract
Background Phosphatidylserine (PS)-targeting positron emission tomography (PET) imaging with labeled small-molecule tracer is a crucial non-invasive molecule imaging method of apoptosis. In this study, semi-automatic radiosynthesis and biodistribution of N-(2-18F-fluoropropionyl)-bis(zinc(II)-dipicolylamine) (18F-FP-DPAZn2), as a potential small-molecule tracer for PET imaging of cell death in Alzheimer’s disease (AD) model, were performed. Methods 18F-FP-DPAZn2 was synthesized on the modified PET-MF-2V-IT-I synthesizer. Biodistribution was determined in normal mice and PET images of AD model were obtained on a micro PET-CT scanner. Results With the modified synthesizer, the total decay-corrected radiochemical yield of 18F-FP-DPAZn2 was 35 ± 6% (n = 5) from 18F− within 105 ± 10 min. Biodistribution results showed that kidney has the highest uptake of 18F-FP-DPAZn2. The uptake of radioactivity in brain kept at a relatively low level during the whole observed time. In vivo 18F-FP-DPAZn2 PET images demonstrated more accumulation of radioactivity in the brain of AD model mice than that in the brain of normal mice. Conclusions The semi-automatic synthetic method provides a slightly higher radiochemical yield and shorter whole synthesis time of 18F-FP-DPAZn2 than the manual operation method. This improved method can give enough radioactivity and high radiochemical purity of 18F-FP-DPAZn2 for in vivo PET imaging. The results show that 18F-FP-DPAZn2 seems to be a potential cell death tracer for AD imaging.
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Affiliation(s)
- Fuhua Wen
- Department of Nuclear Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Dahong Nie
- Department of Nuclear Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Kongzhen Hu
- Department of Nuclear Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Ganghua Tang
- Department of Nuclear Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China.
| | - Shaobo Yao
- Department of Nuclear Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Caihua Tang
- Department of Nuclear Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
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43
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Feng G, Zhang CJ, Lu X, Liu B. Zinc(II)-Tetradentate-Coordinated Probe with Aggregation-Induced Emission Characteristics for Selective Imaging and Photoinactivation of Bacteria. ACS OMEGA 2017; 2:546-553. [PMID: 30023611 PMCID: PMC6044760 DOI: 10.1021/acsomega.6b00564] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 01/30/2017] [Indexed: 06/01/2023]
Abstract
The emergence of drug-resistant bacterial pathogens highlights an urgent need for new therapeutic options. Photodynamic therapy (PDT) has emerged as a potential alternative to antibiotics to kill bacteria, which has been used in clinical settings. PDT employs photosensitizers (PSs), light, and oxygen to kill bacteria by generating highly reactive oxygen species (ROS). PDT can target both external and internal structures of bacteria, which does not really require the PSs to enter bacteria. Therefore, bacteria can hardly develop resistance to PDT. However, most of the PSs reported so far are hydrophobic and tend to form aggregates when they interact with bacteria. The aggregation could cause fluorescence quenching and reduce ROS generation, which generally compromises the effects of both imaging and therapy. In this contribution, we report on a Zn(II)-tetradentate-coordinated red-emissive probe with aggregation-induced emission characterization. The probe could selectively image bacteria over mammalian cells. Moreover, the probe shows potent phototoxicity to both Gram-negative bacteria (Escherichia coli) and Gram-positive bacteria (Bacillus subtilis).
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Affiliation(s)
- Guangxue Feng
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585
| | - Chong-Jing Zhang
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585
| | - Xianmao Lu
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585
| | - Bin Liu
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585
- Institute
of Materials Research and Engineering, Agency
for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore 138634
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44
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Kar C, Shindo Y, Oka K, Nishiyama S, Suzuki K, Citterio D. Spirolactam capped cyanine dyes for designing NIR probes to target multiple metal ions. RSC Adv 2017. [DOI: 10.1039/c7ra03246c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
This work reports cyanine based spirocyclic metal ion probes, showing a fluorescence turn-on response to various metal ions in the near-infrared spectral region.
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Affiliation(s)
- Chirantan Kar
- Department of Applied Chemistry
- Faculty of Science and Technology
- Keio University
- Yokohama 223-8522
- Japan
| | - Yutaka Shindo
- Department of Biosciences and Informatics
- Faculty of Science and Technology
- Keio University
- Yokohama 223-8522
- Japan
| | - Kotaro Oka
- Department of Biosciences and Informatics
- Faculty of Science and Technology
- Keio University
- Yokohama 223-8522
- Japan
| | - Shigeru Nishiyama
- Department of Chemistry
- Faculty of Science and Technology
- Keio University
- Yokohama 223-8522
- Japan
| | - Koji Suzuki
- Department of Applied Chemistry
- Faculty of Science and Technology
- Keio University
- Yokohama 223-8522
- Japan
| | - Daniel Citterio
- Department of Applied Chemistry
- Faculty of Science and Technology
- Keio University
- Yokohama 223-8522
- Japan
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45
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Kowalik P, Elbaum D, Mikulski J, Fronc K, Kamińska I, Morais PC, Eduardo de Souza P, Nunes RB, Veiga-Souza FH, Gruzeł G, Minikayev R, Wojciechowski T, Mosiniewicz-Szablewska E, Szewczyk M, Pawlyta M, Sienkiewicz A, Łapiński M, Zajdel K, Stępień P, Szczepkowski J, Jastrzębski W, Frontczak-Baniewicz M, Paszkowicz W, Sikora B. Upconversion fluorescence imaging of HeLa cells using ROS generating SiO2-coated lanthanide-doped NaYF4 nanoconstructs. RSC Adv 2017. [DOI: 10.1039/c6ra25383k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Multicolor upconversion of SiO2-coated nanoparticles using for cells imaging and reactive oxygen species generation.
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46
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Cao J, Fan J, Sun W, Guo Y, Wu H, Peng X. The photoprocess effects of an amino group located at different positions along the polymethine chain in indodicarbocyanine dyes. RSC Adv 2017. [DOI: 10.1039/c7ra04556e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The amino group is a-ICT in the even position but is the ICT in the odd position.
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Affiliation(s)
- Jianfang Cao
- School of Chemical and Environmental Engineering
- Liaoning University of Technology
- Jinzhou 121001
- China
| | - Jiangli Fan
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- China
| | - Wen Sun
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- China
| | - Yu Guo
- School of Chemical and Environmental Engineering
- Liaoning University of Technology
- Jinzhou 121001
- China
| | - Hongmei Wu
- School of Chemical and Environmental Engineering
- Liaoning University of Technology
- Jinzhou 121001
- China
| | - Xiaojun Peng
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- China
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47
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Murcar-Evans BI, Cabral AD, Toutah K, de Araujo ED, Lai A, Macdonald PM, Berger-Becvar A, Kraskouskaya D, Gunning PT. ProxyPhos sensors for the detection of negatively charged membranes. Analyst 2017; 142:4511-4521. [DOI: 10.1039/c7an00568g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
ProxyPhos sensors selectively detect negatively charged phospholipid membranes.
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Affiliation(s)
- Bronte I. Murcar-Evans
- Department of Chemistry and Department of Chemical & Physical Sciences
- University of Toronto
- Mississauga
- Mississauga
- Canada L5L 1C6
| | - Aaron D. Cabral
- Department of Chemistry and Department of Chemical & Physical Sciences
- University of Toronto
- Mississauga
- Mississauga
- Canada L5L 1C6
| | - Krimo Toutah
- Department of Chemistry and Department of Chemical & Physical Sciences
- University of Toronto
- Mississauga
- Mississauga
- Canada L5L 1C6
| | - Elvin D. de Araujo
- Department of Chemistry and Department of Chemical & Physical Sciences
- University of Toronto
- Mississauga
- Mississauga
- Canada L5L 1C6
| | - Angel Lai
- Department of Chemistry and Department of Chemical & Physical Sciences
- University of Toronto
- Mississauga
- Mississauga
- Canada L5L 1C6
| | - Peter M. Macdonald
- Department of Chemistry and Department of Chemical & Physical Sciences
- University of Toronto
- Mississauga
- Mississauga
- Canada L5L 1C6
| | - Angelika Berger-Becvar
- Department of Chemistry and Department of Chemical & Physical Sciences
- University of Toronto
- Mississauga
- Mississauga
- Canada L5L 1C6
| | - Dziyana Kraskouskaya
- Department of Chemistry and Department of Chemical & Physical Sciences
- University of Toronto
- Mississauga
- Mississauga
- Canada L5L 1C6
| | - Patrick T. Gunning
- Department of Chemistry and Department of Chemical & Physical Sciences
- University of Toronto
- Mississauga
- Mississauga
- Canada L5L 1C6
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48
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Ayesa U, Gray BD, Pak KY, Chong PLG. Liposomes Containing Lipid-Soluble Zn(II)-Bis-dipicolylamine Derivatives Show Potential To Be Targeted to Phosphatidylserine on the Surface of Cancer Cells. Mol Pharm 2016; 14:147-156. [PMID: 28043132 DOI: 10.1021/acs.molpharmaceut.6b00760] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Here we used a lipid-soluble Zn(II)-bis-dipicolylamine derivative as a membrane component to develop liposomal carriers that have potential to be targeted to phosphatidylserine (PS) rich surfaces on cancer cells and to preferentially kill cancer cells without using anticancer drugs. This DPA derivative (abbreviated as DPA-Cy3[22,22]) contains the fluorophore cyanine 3 (Cy3) and two 22-carbon chains that can be anchored into liposomal membrane bilayers. DPA-Cy3[22,22]/1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) unilamellar vesicles (∼150 nm) showed selective binding to PS-containing liposomes as demonstrated by anion exchange chromatography. This binding does not result in vesicle fusion or aggregation. Flow cytometry showed that DPA-Cy3[22,22]/POPC liposomes have preferential binding to MCF-7 breast cancer cells over MCF-12A noncancer cells due to 3-7 times more PS exposures on MCF-7. The extent of liposome binding with MCF-7 cells was increased by two times after cells were pretreated with the apoptotic inducer camptothecin, which increased PS exposure to the cell surface. Moreover, our flow cytometry data also suggest that local cell membrane perturbations may occur upon liposome binding and internalization. This implies that DPA-Cy3[22,22]/POPC liposomes alone may have a PS-dependent cytotoxic effect. This assertion was supported by the cell proliferation assay, which showed that 9.1 mol % DPA-Cy3[22,22]/POPC liposomes exert cytotoxicity on MCF-7 cells 3.5 times higher than that on MCF-12A cells. These results indicate that DPA-Cy3[22,22]-containing liposomes hold great promise as efficient nano drug carriers.
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Affiliation(s)
- Umme Ayesa
- Department of Medical Genetics and Molecular Biochemistry, The Lewis Katz School of Medicine at Temple University , Philadelphia, Pennsylvania 19140, United States
| | - Brian D Gray
- Molecular Targeting Technologies, Inc. , West Chester, Pennsylvania 19380, United States
| | - Koon Y Pak
- Molecular Targeting Technologies, Inc. , West Chester, Pennsylvania 19380, United States
| | - Parkson Lee-Gau Chong
- Department of Medical Genetics and Molecular Biochemistry, The Lewis Katz School of Medicine at Temple University , Philadelphia, Pennsylvania 19140, United States
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49
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Plasmonic-based colorimetric and spectroscopic discrimination of acetic and butyric acids produced by different types of Escherichia coli through the different assembly structures formation of gold nanoparticles. Anal Chim Acta 2016; 933:196-206. [DOI: 10.1016/j.aca.2016.05.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 05/18/2016] [Accepted: 05/24/2016] [Indexed: 11/23/2022]
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50
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