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Li B, Wu C, Li Z, Yao Z, Tian J, Shan Y, Chen S, Song W, Pan W, Ping Y, Liu B. Tumor Microenvironment-Activated In Situ Synthesis of Peroxynitrite for Enhanced Chemodynamic Therapy. ACS NANO 2024; 18:27042-27054. [PMID: 39298299 DOI: 10.1021/acsnano.4c10012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/21/2024]
Abstract
Chemodynamic therapy (CDT) can induce cancer cell death through hydroxyl radicals (·OH) generated from Fenton or Fenton-like reactions. Compared with traditional therapies, CDT effectively overcomes inevitable drug resistance and exhibits low side effects. However, clinical application still faces challenges, primarily due to insufficient ·OH generation and the short-lifetime of ·OH in vivo. To address these challenges, we developed a peroxynitrite (ONOO-)-based CDT nanodrug (DOX@PMOF) composed of MOF-199, NO donor (PArg), and nicotinamide adenine dinucleotide phosphate oxidase 4 (NOX4) activator (doxorubicin, DOX). In DOX@PMOF, MOF-199 serves as both a carrier for loading DOX and a source of Cu+ for triggering CDT. Upon uptake by cancer cells, the high concentration of glutathione (GSH) reduces MOF-199 to Cu+, which then reacts with H2O2 to generate ·OH. Moreover, the released DOX upregulates NOX4 expression, leading to the elevated H2O2 level and thereby promoting a high-efficiency Fenton-like reaction for sufficient ·OH generation. Subsequently, PArg generates abundant NO in response to the tumor microenvironment, leading to a cascade of NO and ·OH for the in situ synthesis of ONOO-. ONOO- is more toxic and has a longer lifetime and diffusion distance than ·OH, resulting in a more effective CDT treatment. To further enhance the in vivo therapeutic effect, we coated DOX@PMOF with a homologous cell membrane to form an active tumor-targeting nanodrug (DOX@MPMOF), which has demonstrated the ability to effectively inhibit tumor growth and metastasis while exhibiting good biosafety.
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Affiliation(s)
- Bowen Li
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585Singapore
| | - Chongzhi Wu
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
- School of Pharmaceutical Sciences, Guizhou University, Guiyang, Guizhou 550025, PR China
| | - Zhiyao Li
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
- School of Pharmaceutical Sciences, Guizhou University, Guiyang, Guizhou 550025, PR China
| | - Zhuo Yao
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Jianwu Tian
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585Singapore
| | - Yi Shan
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585Singapore
| | - Siqin Chen
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585Singapore
| | - Wentao Song
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585Singapore
- Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University, Fuzhou 350207, P. R. China
| | - Weidong Pan
- School of Pharmaceutical Sciences, Guizhou University, Guiyang, Guizhou 550025, PR China
| | - Yuan Ping
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585Singapore
- Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University, Fuzhou 350207, P. R. China
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2
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Oh MJ, Yoon S, Babeer A, Liu Y, Ren Z, Xiang Z, Miao Y, Cormode DP, Chen C, Steager E, Koo H. Nanozyme-Based Robotics Approach for Targeting Fungal Infection. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2300320. [PMID: 37141008 PMCID: PMC10624647 DOI: 10.1002/adma.202300320] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 04/29/2023] [Indexed: 05/05/2023]
Abstract
Fungal pathogens have been designated by the World Health Organization as microbial threats of the highest priority for global health. It remains a major challenge to improve antifungal efficacy at the site of infection while avoiding off-target effects, fungal spreading, and drug tolerance. Here, a nanozyme-based microrobotic platform is developed that directs localized catalysis to the infection site with microscale precision to achieve targeted and rapid fungal killing. Using electromagnetic field frequency modulation and fine-scale spatiotemporal control, structured iron oxide nanozyme assemblies are formed that display tunable dynamic shape transformation and catalysis activation. The catalytic activity varies depending on the motion, velocity, and shape providing controllable reactive oxygen species (ROS) generation. Unexpectedly, nanozyme assemblies bind avidly to fungal (Candida albicans) surfaces to enable concentrated accumulation and targeted ROS-mediated killing in situ. By exploiting these tunable properties and selective binding to fungi, localized antifungal activity is achieved using in vivo-like cell spheroid and animal tissue infection models. Structured nanozyme assemblies are directed to Candida-infected sites using programmable algorithms to perform precisely guided spatial targeting and on-site catalysis resulting in fungal eradication within 10 min. This nanozyme-based microrobotics approach provides a uniquely effective and targeted therapeutic modality for pathogen elimination at the infection site.
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Affiliation(s)
- Min Jun Oh
- Biofilm Research Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Chemical and Biomolecular Engineering, School of Engineering & Applied Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Seokyoung Yoon
- Biofilm Research Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Pennsylvania, Philadelphia, PA 19104, USA
| | - Alaa Babeer
- Biofilm Research Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Endodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Oral Biology, King Abdulaziz University, Jeddah 21589, KSA
| | - Yuan Liu
- Biofilm Research Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Preventive & Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Zhi Ren
- Biofilm Research Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Center for Innovation & Precision Dentistry, School of Dental Medicine and School of Engineering & Applied Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Zhenting Xiang
- Biofilm Research Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Yilan Miao
- Biofilm Research Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - David P. Cormode
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Pennsylvania, Philadelphia, PA 19104, USA
- Department of Bioengineering, School of Engineering & Applied Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Chider Chen
- Department of Oral and Maxillofacial Surgery and Pharmacology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Edward Steager
- Biofilm Research Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Center for Innovation & Precision Dentistry, School of Dental Medicine and School of Engineering & Applied Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
- GRASP Laboratory, School of Engineering & Applied Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Hyun Koo
- Biofilm Research Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Center for Innovation & Precision Dentistry, School of Dental Medicine and School of Engineering & Applied Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
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3
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Pan L, Peng H, Lee B, Zhao J, Shen X, Yan X, Hua Y, Kim J, Kim D, Lin M, Zhang S, Li X, Yi X, Yao F, Qin Z, Du J, Chi Y, Nam JM, Hyeon T, Liu J. Cascade Catalytic Nanoparticles Selectively Alkalize Cancerous Lysosomes to Suppress Cancer Progression and Metastasis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2305394. [PMID: 37643367 DOI: 10.1002/adma.202305394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 08/16/2023] [Indexed: 08/31/2023]
Abstract
Lysosomes are critical in modulating the progression and metastasis for various cancers. There is currently an unmet need for lysosomal alkalizers that can selectively and safely alter the pH and inhibit the function of cancer lysosomes. Here an effective, selective, and safe lysosomal alkalizer is reported that can inhibit autophagy and suppress tumors in mice. The lysosomal alkalizer consists of an iron oxide core that generates hydroxyl radicals (•OH) in the presence of excessive H+ and hydrogen peroxide inside cancer lysosomes and cerium oxide satellites that capture and convert •OH into hydroxide ions. Alkalized lysosomes, which display impaired enzyme activity and autophagy, lead to cancer cell apoptosis. It is shown that the alkalizer effectively inhibits both local and systemic tumor growth and metastasis in mice. This work demonstrates that the intrinsic properties of nanoparticles can be harnessed to build effective lysosomal alkalizers that are both selective and safe.
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Affiliation(s)
- Limin Pan
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
- Institute of Neuroscience, State Key Laboratory of Neuroscience, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Haibao Peng
- Department of Neurosurgery, Huashan Hospital, Institute for Translational Brain Research, MOE Frontiers Center for Brain Science, Fudan University, Shanghai, 200032, China
| | - Bowon Lee
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jiaxu Zhao
- Department of Neurosurgery, Huashan Hospital, Institute for Translational Brain Research, MOE Frontiers Center for Brain Science, Fudan University, Shanghai, 200032, China
| | - Xiulian Shen
- Institute of Neuroscience, State Key Laboratory of Neuroscience, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Ximei Yan
- Institute of Neuroscience, State Key Laboratory of Neuroscience, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Yipeng Hua
- Institute of Neuroscience, State Key Laboratory of Neuroscience, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, 200031, China
- School of Life Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Jeonghyun Kim
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Dokyoon Kim
- Department of Bionano Engineering, Hanyang University, Ansan, 15588, Republic of Korea
| | - Mouhong Lin
- Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Shengjian Zhang
- Department of Radiology, Cancer Hospital/Institute and Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Xiaohui Li
- Department of Neurosurgery, Huashan Hospital, Institute for Translational Brain Research, MOE Frontiers Center for Brain Science, Fudan University, Shanghai, 200032, China
| | - Xueying Yi
- Department of Neurosurgery, Huashan Hospital, Institute for Translational Brain Research, MOE Frontiers Center for Brain Science, Fudan University, Shanghai, 200032, China
| | - Feibai Yao
- Department of Neurosurgery, Huashan Hospital, Institute for Translational Brain Research, MOE Frontiers Center for Brain Science, Fudan University, Shanghai, 200032, China
| | - Zhiyong Qin
- Department of Neurosurgery, Huashan Hospital, Institute for Translational Brain Research, MOE Frontiers Center for Brain Science, Fudan University, Shanghai, 200032, China
| | - Jiulin Du
- Institute of Neuroscience, State Key Laboratory of Neuroscience, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, 200031, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yudan Chi
- Department of Neurosurgery, Huashan Hospital, Institute for Translational Brain Research, MOE Frontiers Center for Brain Science, Fudan University, Shanghai, 200032, China
| | - Jwa-Min Nam
- Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Taeghwan Hyeon
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jianan Liu
- Institute of Neuroscience, State Key Laboratory of Neuroscience, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, 200031, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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4
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Lai Y, Chi Y, Jia X. Mechanistic modelling of oxygen enhancement ratio of radiation via Monte Carlo simulation-based DNA damage calculation. Phys Med Biol 2022; 67:10.1088/1361-6560/ac8853. [PMID: 35944522 PMCID: PMC10152552 DOI: 10.1088/1361-6560/ac8853] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 08/09/2022] [Indexed: 11/12/2022]
Abstract
Objective.Oxygen plays an important role in affecting the cellular radio-sensitivity to ionizing radiation. The objective of this study is to build a mechanistic model to compute oxygen enhancement ratio (OER) using a GPU-based Monte Carlo (MC) simulation package gMicroMC for microscopic radiation transport simulation and DNA damage calculation.Approach.We first simulated the water radiolysis process in the presence of DNA and oxygen for 1 ns and recorded the produced DNA damages. In this process, chemical reactions among oxygen, water radiolysis free radicals and DNA molecules were considered. We then applied a probabilistic approach to model the reactions between oxygen and indirect DNA damages for a maximal reaction time oft0. Finally, we defined two parametersP0andP1, representing probabilities for DNA damages without and with oxygen fixation effect not being restored in the repair process, to compute the final DNA double strand breaks (DSBs). As cell survival fraction is mainly determined by the number of DSBs, we assumed that the same numbers of DSBs resulted in the same cell survival rates, which enabled us to compute the OER as the ratio of doses producing the same number of DSBs without and with oxygen. We determined the three parameters (t0,P0andP1) by fitting the OERs obtained in our computation to a set of published experimental data under x-ray irradiation. We then validated the model by performing OER studies under proton irradiation and studied model sensitivity to parameter values.Main results.We obtained the model parameters ast0= 3.8 ms,P0= 0.08, andP1= 0.28 with a mean difference of 3.8% between the OERs computed by our model and that obtained from experimental measurements under x-ray irradiation. Applying the established model to proton irradiation, we obtained OERs as functions of oxygen concentration, LET, and dose values, which generally agreed with published experimental data. The parameter sensitivity analysis revealed that the absolute magnitude of the OER curve relied on the values ofP0andP1, while the curve was subject to a horizontal shift when adjustingt0.Significance.This study developed a mechanistic model that fully relies on microscopic MC simulations to compute OER.
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Affiliation(s)
- Youfang Lai
- Innovative Technology of Radiotherapy Computations and Hardware (iTORCH) Laboratory, Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75287, United States of America
- Department of Physics, University of Texas at Arlington, Arlington, TX 76019, United States of America
| | - Yujie Chi
- Department of Physics, University of Texas at Arlington, Arlington, TX 76019, United States of America
| | - Xun Jia
- Innovative Technology of Radiotherapy Computations and Hardware (iTORCH) Laboratory, Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75287, United States of America
- Now at Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, MD, United States of America
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5
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Oh MJ, Babeer A, Liu Y, Ren Z, Wu J, Issadore DA, Stebe KJ, Lee D, Steager E, Koo H. Surface Topography-Adaptive Robotic Superstructures for Biofilm Removal and Pathogen Detection on Human Teeth. ACS NANO 2022; 16:11998-12012. [PMID: 35764312 PMCID: PMC9413416 DOI: 10.1021/acsnano.2c01950] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The eradication of biofilms remains an unresolved challenge across disciplines. Furthermore, in biomedicine, the sampling of spatially heterogeneous biofilms is crucial for accurate pathogen detection and precise treatment of infection. However, current approaches are incapable of removing highly adhesive biostructures from topographically complex surfaces. To meet these needs, we demonstrate magnetic field-directed assembly of nanoparticles into surface topography-adaptive robotic superstructures (STARS) for precision-guided biofilm removal and diagnostic sampling. These structures extend or retract at multilength scales (micro-to-centimeter) to operate on opposing surfaces and rapidly adjust their shape, length, and stiffness to adapt and apply high-shear stress. STARS conform to complex surface topographies by entering angled grooves or extending into narrow crevices and "scrub" adherent biofilm with multiaxis motion while producing antibacterial reagents on-site. Furthermore, as the superstructure disrupts the biofilm, it captures bacterial, fungal, viral, and matrix components, allowing sample retrieval for multiplexed diagnostic analysis. We apply STARS using automated motion patterns to target complex three-dimensional geometries of ex vivo human teeth to retrieve biofilm samples with microscale precision, while providing "toothbrushing-like" and "flossing-like" action with antibacterial activity in real-time to achieve mechanochemical removal and multikingdom pathogen detection. This approach could lead to autonomous, multifunctional antibiofilm platforms to advance current oral care modalities and other fields contending with harmful biofilms on hard-to-reach surfaces.
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Affiliation(s)
- Min Jun Oh
- Biofilm Research
Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department
of Chemical and Biomolecular Engineering, School of Engineering and
Applied Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department
of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Alaa Babeer
- Biofilm Research
Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department
of Endodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department
of Oral Biology, King Abdulaziz University, Jeddah 21589, Kingdom of Saudi Arabia
| | - Yuan Liu
- Biofilm Research
Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department
of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Zhi Ren
- Biofilm Research
Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department
of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Center
for
Innovation and Precision Dentistry, School of Engineering and Applied
Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Jingyu Wu
- Department
of Chemical and Biomolecular Engineering, School of Engineering and
Applied Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - David A. Issadore
- Department
of Chemical and Biomolecular Engineering, School of Engineering and
Applied Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Center
for
Innovation and Precision Dentistry, School of Engineering and Applied
Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Kathleen J. Stebe
- Department
of Chemical and Biomolecular Engineering, School of Engineering and
Applied Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Center
for
Innovation and Precision Dentistry, School of Engineering and Applied
Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Daeyeon Lee
- Department
of Chemical and Biomolecular Engineering, School of Engineering and
Applied Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Center
for
Innovation and Precision Dentistry, School of Engineering and Applied
Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Edward Steager
- Biofilm Research
Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Center
for
Innovation and Precision Dentistry, School of Engineering and Applied
Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- GRASP
Laboratory,
School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Hyun Koo
- Biofilm Research
Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department
of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Center
for
Innovation and Precision Dentistry, School of Engineering and Applied
Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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6
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Liu Y, Huang Y, Kim D, Ren Z, Oh MJ, Cormode DP, Hara AT, Zero DT, Koo H. Ferumoxytol Nanoparticles Target Biofilms Causing Tooth Decay in the Human Mouth. NANO LETTERS 2021; 21:9442-9449. [PMID: 34694125 PMCID: PMC9308480 DOI: 10.1021/acs.nanolett.1c02702] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Severe tooth decay has been associated with iron deficiency anemia that disproportionally burdens susceptible populations. Current modalities are insufficient in severe cases where pathogenic dental biofilms rapidly accumulate, requiring new antibiofilm approaches. Here, we show that ferumoxytol, a Food and Drug Administration-approved nanoparticle formulation for treating iron deficiency, exerts an alternative therapeutic activity via the catalytic activation of hydrogen peroxide, which targets bacterial pathogens in biofilms and suppresses tooth enamel decay in an intraoral human disease model. Data reveal the potent antimicrobial specificity of ferumoxytol iron oxide nanoparticles (FerIONP) against biofilms harboring Streptococcus mutans via preferential binding that promotes bacterial killing through in situ free-radical generation. Further analysis indicates that the targeting mechanism involves interactions of FerIONP with pathogen-specific glucan-binding proteins, which have a minimal effect on commensal streptococci. In addition, we demonstrate that FerIONP can detect pathogenic biofilms on natural teeth via a facile colorimetric reaction. Our findings provide clinical evidence and the theranostic potential of catalytic nanoparticles as a targeted anti-infective nanomedicine.
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Affiliation(s)
- Yuan Liu
- Department of Preventive & Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Biofilm Research Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Yue Huang
- Biofilm Research Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Dongyeop Kim
- Department of Preventive Dentistry, School of Dentistry, Jeonbuk National University, Deokjin-gu, Jeonju 54869, Korea
| | - Zhi Ren
- Biofilm Research Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Min Jun Oh
- Biofilm Research Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - David P Cormode
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Anderson T Hara
- Department of Cariology, Operative Dentistry and Dental Public Health, School of Dentistry, Indiana University, Indianapolis, Indiana 46202, United States
| | - Domenick T Zero
- Department of Cariology, Operative Dentistry and Dental Public Health, School of Dentistry, Indiana University, Indianapolis, Indiana 46202, United States
| | - Hyun Koo
- Biofilm Research Laboratories, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Center for Innovation & Precision Dentistry, School of Dental Medicine, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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7
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Curulli A. Nanomaterials in Electrochemical Sensing Area: Applications and Challenges in Food Analysis. Molecules 2020; 25:E5759. [PMID: 33297366 PMCID: PMC7730649 DOI: 10.3390/molecules25235759] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 02/01/2023] Open
Abstract
Recently, nanomaterials have received increasing attention due to their unique physical and chemical properties, which make them of considerable interest for applications in many fields, such as biotechnology, optics, electronics, and catalysis. The development of nanomaterials has proven fundamental for the development of smart electrochemical sensors to be used in different application fields such, as biomedical, environmental, and food analysis. In fact, they showed high performances in terms of sensitivity and selectivity. In this report, we present a survey of the application of different nanomaterials and nanocomposites with tailored morphological properties as sensing platforms for food analysis. Particular attention has been devoted to the sensors developed with nanomaterials such as carbon-based nanomaterials, metallic nanomaterials, and related nanocomposites. Finally, several examples of sensors for the detection of some analytes present in food and beverages, such as some hydroxycinnamic acids (caffeic acid, chlorogenic acid, and rosmarinic acid), caffeine (CAF), ascorbic acid (AA), and nitrite are reported and evidenced.
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Affiliation(s)
- Antonella Curulli
- Istituto per lo Studio dei Materiali Nanostrutturati (ISMN) CNR, Via del Castro Laurenziano 7, 00161 Roma, Italy
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8
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Huang Y, Liu Y, Shah S, Kim D, Simon-Soro A, Ito T, Hajfathalian M, Li Y, Hsu JC, Nieves LM, Alawi F, Naha PC, Cormode DP, Koo H. Precision targeting of bacterial pathogen via bi-functional nanozyme activated by biofilm microenvironment. Biomaterials 2020; 268:120581. [PMID: 33302119 DOI: 10.1016/j.biomaterials.2020.120581] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 11/21/2020] [Accepted: 11/23/2020] [Indexed: 01/08/2023]
Abstract
Human dental caries is an intractable biofilm-associated disease caused by microbial interactions and dietary sugars on the host's teeth. Commensal bacteria help control opportunistic pathogens via bioactive products such as hydrogen peroxide (H2O2). However, high-sugar consumption disrupts homeostasis and promotes pathogen accumulation in acidic biofilms that cause tooth-decay. Here, we exploit the pathological (sugar-rich/acidic) conditions using a nanohybrid system to increase intrinsic H2O2 production and trigger pH-dependent reactive oxygen species (ROS) generation for efficient biofilm virulence targeting. The nanohybrid contains glucose-oxidase that catalyzes glucose present in biofilms to increase intrinsic H2O2, which is converted by iron oxide nanoparticles with peroxidase-like activity into ROS in acidic pH. Notably, it selectively kills Streptococcus mutans (pathogen) without affecting Streptococcus oralis (commensal) via preferential pathogen-binding and in situ ROS generation. Furthermore, nanohybrid treatments potently reduced dental caries in a rodent model. Compared to chlorhexidine (positive-control), which disrupted oral microbiota diversity, the nanohybrid had significant higher efficacy without affecting soft-tissues and the oral-gastrointestinal microbiomes, while modulating dental health-associated microbial activity in vivo. The data reveal therapeutic precision of a bi-functional hybrid nanozyme against a biofilm-related disease in a controlled-manner activated by pathological conditions.
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Affiliation(s)
- Yue Huang
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States; Biofilm Research Labs, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, United States; Department of Orthodontics and Divisions of Pediatric Dentistry & Community Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, United States
| | - Yuan Liu
- Biofilm Research Labs, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, United States; Department of Orthodontics and Divisions of Pediatric Dentistry & Community Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, United States
| | - Shrey Shah
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States; Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, 19104, United States
| | - Dongyeop Kim
- Biofilm Research Labs, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, United States; Department of Orthodontics and Divisions of Pediatric Dentistry & Community Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, United States; Department of Preventive Dentistry, School of Dentistry, Jeonbuk National Universitys, Deokjin-gu, Jeonju, 54896, South Korea
| | - Aurea Simon-Soro
- Biofilm Research Labs, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, United States; Department of Orthodontics and Divisions of Pediatric Dentistry & Community Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, United States
| | - Tatsuro Ito
- Biofilm Research Labs, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, United States; Department of Orthodontics and Divisions of Pediatric Dentistry & Community Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, United States; Department of Pediatric Dentistry, School of Dentistry at Matsudo, Nihon University, Matsudo, Chiba, 271-8587, Japan
| | - Maryam Hajfathalian
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Yong Li
- Biofilm Research Labs, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, United States
| | - Jessica C Hsu
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States; Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, 19104, United States
| | - Lenitza M Nieves
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Faizan Alawi
- Department of Pathology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19014, United States
| | - Pratap C Naha
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - David P Cormode
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States; Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, 19104, United States; Department of Cardiology, University of Pennsylvania, Philadelphia, PA, 19104, United States; Center for Innovation & Precision Dentistry, School of Dental Medicine, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, 19104, United States.
| | - Hyun Koo
- Biofilm Research Labs, Levy Center for Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, United States; Department of Orthodontics and Divisions of Pediatric Dentistry & Community Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, United States; Center for Innovation & Precision Dentistry, School of Dental Medicine, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, 19104, United States.
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9
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Nammour S, El Mobadder M, Maalouf E, Namour M, Namour A, Rey G, Matamba P, Matys J, Zeinoun T, Grzech-Leśniak K. Clinical Evaluation of Diode (980 nm) Laser-Assisted Nonsurgical Periodontal Pocket Therapy: A Randomized Comparative Clinical Trial and Bacteriological Study. PHOTOBIOMODULATION PHOTOMEDICINE AND LASER SURGERY 2020; 39:10-22. [PMID: 32865464 DOI: 10.1089/photob.2020.4818] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Background: Mechanical debridement is the gold standard in the periodontitis therapy. However, it is suggested that adjunctive use of lasers can result in a more effective treatment outcome. Objective: Evaluate the efficiency of diode laser-assisted nonsurgical therapy of periodontitis as adjunctive to scaling and root planing (SRP). Methods: One hundred sixty vertical bone defects [pocket depth (PD) at baseline ≥6 mm] had been randomly allocated to receive SRP alone (group C) or SRP coupled to a diode laser (980 nm) protocol (group C+L): SRP, irrigation with hydrogen peroxide solution (3%), de-epithelization of the internal and external gingiva followed by blood stabilization, and coagulation by laser beam were made. Beam parameters: 10 μsec/pulse duration, 10 kHz, pick power of 10 W, average power of 1 W, and fiber diameter of 400 μm. Plaque index (PI), bleeding on probing, gingival recession (GR), clinical attachment level (CAL), and PD were measured at baseline, at 6 weeks, 12 weeks, 18 weeks, 6 months, and 12 months. Microbiological data were collected randomly from 26 pockets from both groups at baseline, 6 weeks, 12 weeks, and 6 months after treatment. Results: At all periods of follow-up, there was a significant difference between both groups in all clinical parameters except in GR. In group C+L, 76% of pockets had PD ≤3 mm after 12 months of follow-up and an average of PD = 1.77 ± 0.46 mm, while 56% of pockets in group control (C) had an average of PD = 5.00 ± 0.83 mm after 12 months of follow-up. Total bacteria count in group C + L was significantly lower compared to group C only at 12 weeks and 6 months of follow-up. Furthermore, there was high significant decrease in the number of Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, Tannerella forsythia, and Prevotella intermedia at all the follow-up periods. Conclusions: As adjunctive to SRP, diode laser-assisted nonsurgical therapy of periodontitis has significantly improved clinical parameters of PI and POB and has significantly reduced the clinical attachment loss (CAL) and PD compared to the control group after 1 year of follow-up. A significant reduction in periodontal pathogens has been observed in group C + L only at 12 weeks and 6 months of follow-up.
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Affiliation(s)
- Samir Nammour
- Department of Dental Sciences, Faculty of Medicine, University of Liege, Liege, Belgium
| | - Marwan El Mobadder
- Department of Dental Sciences, Faculty of Medicine, University of Liege, Liege, Belgium
| | - Elie Maalouf
- Faculty of Dentistry, Lebanese University, Beirut, Lebanon
| | - Melanie Namour
- Department of Dental Sciences, Faculty of Medicine, University of Liege, Liege, Belgium
| | - Amaury Namour
- Department of Dental Sciences, Faculty of Medicine, University of Liege, Liege, Belgium
| | - Gerard Rey
- Service formation continue Universités Paris 7 Garancière et Montpellier UFR, Agde, France
| | - Patrick Matamba
- Department of Dental Sciences, Faculty of Medicine, University of Liege, Liege, Belgium
| | - Jacek Matys
- Laser Laboratory, Department of Dental Surgery, Wroclaw Medical University, Wroclaw, Poland
| | - Toni Zeinoun
- Faculty of Dentistry, Lebanese University, Beirut, Lebanon
| | - Kinga Grzech-Leśniak
- Laser Laboratory, Department of Dental Surgery, Wroclaw Medical University, Wroclaw, Poland.,Department of Periodontics, School of Dentistry, Virginia Commonwealth University, Richmond, Virginia, USA
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10
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Anchoring BODIPY photosensitizers enable pan-microbial photoinactivation. Eur J Med Chem 2020; 199:112361. [PMID: 32408214 DOI: 10.1016/j.ejmech.2020.112361] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 04/17/2020] [Accepted: 04/17/2020] [Indexed: 12/20/2022]
Abstract
Photodynamic antimicrobial chemotherapy (PACT) is an effective strategy to inactivate pathogenic and resistant microbes. However, pan-microbial photoinactivation has hardly achieved. In this manuscript, we built anti-microbial PSs based on 2,6-diiodo-1,3,5,7-tetramethyl BODIPY (2I-BDP) using anchoring strategy through modifications on boron atom with bis-cationic moieties. With appropriate bis-cationic anchoring, we could achieve effective PACT for pan-microbial photoinactivation via straight forward modifications. Our studies suggested that integration of an efficient photosensitizer, good amphiphilicity, as well as tight interaction with microbial membrane could be essential for effective PACT.
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11
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Lai Y, Tsai MY, Tian Z, Qin N, Yan C, Hung SH, Chi Y, Jia X. A new open-source GPU-based microscopic Monte Carlo simulation tool for the calculations of DNA damages caused by ionizing radiation - Part II: sensitivity and uncertainty analysis. Med Phys 2020; 47:1971-1982. [PMID: 31975390 DOI: 10.1002/mp.14036] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 12/26/2019] [Accepted: 01/13/2020] [Indexed: 11/05/2022] Open
Abstract
PURPOSE Calculations of deoxyribonucleic acid (DNA) damages involve many parameters in the computation process. As these parameters are often subject to uncertainties, it is of central importance to comprehensively quantify their impacts on DNA single-strand break (SSB) and double-strand break (DSB) yields. This has been a challenging task due to the required large number of simulations and the relatively low computational efficiency using CPU-based MC packages. In this study, we present comprehensive evaluations on sensitivities and uncertainties of DNA SSB and DSB yields on 12 parameters using our GPU-based MC tool, gMicroMC. METHODS We sampled one electron at a time in a water sphere containing a human lymphocyte nucleus and transport the electrons and generated radicals until 2 Gy dose was accumulated in the nucleus. We computed DNA damages caused by electron energy deposition events in the physical stage and the hydroxyl radicals at the end of the chemical stage. We repeated the computations by varying 12 parameters: (a) physics cross section, (b) cutoff energy for electron transport, (c)-(e) three branching ratios of hydroxyl radicals in the de-excitation of excited water molecules, (f) temporal length of the chemical stage, (g)-(h) reaction radii for direct and indirect damages, (i) threshold energy defining the threshold damage model to generate a physics damage, (j)-(k) minimum and maximum energy values defining the linear-probability damage model to generate a physics damage, and (l) probability to generate a damage by a radical. We quantified sensitivity of SSB and DSB yields with respect to these parameters for cases with 1.0 and 4.5 keV electrons. We further estimated uncertainty of SSB and DSB yields caused by uncertainties of these parameters. RESULTS Using a threshold of 10% uncertainty as a criterion, threshold energy in the threshold damage model, maximum energy in the linear-probability damage model, and probability for a radical to generate a damage were found to cause large uncertainties in both SSB and DSB yields. The scaling factor of the cross section, cutoff energy, physics reaction radius, and minimum energy in the linear-probability damage model were found to generate large uncertainties in DSB yields. CONCLUSIONS We identified parameters that can generate large uncertainties in the calculations of SSB and DSB yields. Our study could serve as a guidance to reduce uncertainties of parameters and hence uncertainties of the simulation results.
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Affiliation(s)
- Youfang Lai
- Innovative Technology Of Radiotherapy Computation and Hardware (iTORCH) laboratory, Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX, 75287, USA.,Department of Physics, University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Min-Yu Tsai
- Innovative Technology Of Radiotherapy Computation and Hardware (iTORCH) laboratory, Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX, 75287, USA.,Department of Computer Science & Information Engineering, National Taiwan University, Taipei, Taiwan
| | - Zhen Tian
- Innovative Technology Of Radiotherapy Computation and Hardware (iTORCH) laboratory, Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX, 75287, USA
| | - Nan Qin
- Innovative Technology Of Radiotherapy Computation and Hardware (iTORCH) laboratory, Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX, 75287, USA
| | - Congchong Yan
- Innovative Technology Of Radiotherapy Computation and Hardware (iTORCH) laboratory, Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX, 75287, USA
| | - Shih-Hao Hung
- Department of Computer Science & Information Engineering, National Taiwan University, Taipei, Taiwan
| | - Yujie Chi
- Department of Physics, University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Xun Jia
- Innovative Technology Of Radiotherapy Computation and Hardware (iTORCH) laboratory, Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX, 75287, USA
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12
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Forster JC, Douglass MJJ, Phillips WM, Bezak E. Stochastic multicellular modeling of x-ray irradiation, DNA damage induction, DNA free-end misrejoining and cell death. Sci Rep 2019; 9:18888. [PMID: 31827107 PMCID: PMC6906404 DOI: 10.1038/s41598-019-54941-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 11/19/2019] [Indexed: 01/26/2023] Open
Abstract
The repair or misrepair of DNA double-strand breaks (DSBs) largely determines whether a cell will survive radiation insult or die. A new computational model of multicellular, track structure-based and pO2-dependent radiation-induced cell death was developed and used to investigate the contribution to cell killing by the mechanism of DNA free-end misrejoining for low-LET radiation. A simulated tumor of 1224 squamous cells was irradiated with 6 MV x-rays using the Monte Carlo toolkit Geant4 with low-energy Geant4-DNA physics and chemistry modules up to a uniform dose of 1 Gy. DNA damage including DSBs were simulated from ionizations, excitations and hydroxyl radical interactions along track segments through cell nuclei, with a higher cellular pO2 enhancing the conversion of DNA radicals to strand breaks. DNA free-ends produced by complex DSBs (cDSBs) were able to misrejoin and produce exchange-type chromosome aberrations, some of which were asymmetric and lethal. A sensitivity analysis was performed and conditions of full oxia and anoxia were simulated. The linear component of cell killing from misrejoining was consistently small compared to values in the literature for the linear component of cell killing for head and neck squamous cell carcinoma (HNSCC). This indicated that misrejoinings involving DSBs from the same x-ray (including all associated secondary electrons) were rare and that other mechanisms (e.g. unrejoined ends) may be important. Ignoring the contribution by the indirect effect toward DNA damage caused the DSB yield to drop to a third of its original value and the cDSB yield to drop to a tenth of its original value. Track structure-based cell killing was simulated in all 135306 viable cells of a 1 mm3 hypoxic HNSCC tumor for a uniform dose of 1 Gy.
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Affiliation(s)
- Jake C Forster
- Department of Nuclear Medicine, South Australia Medical Imaging, The Queen Elizabeth Hospital, Woodville South, SA, 5011, Australia. .,Department of Physics, University of Adelaide, Adelaide, SA, 5005, Australia.
| | - Michael J J Douglass
- Department of Physics, University of Adelaide, Adelaide, SA, 5005, Australia.,Department of Medical Physics, Royal Adelaide Hospital, Adelaide, SA, 5000, Australia
| | - Wendy M Phillips
- Department of Physics, University of Adelaide, Adelaide, SA, 5005, Australia.,Department of Medical Physics, Royal Adelaide Hospital, Adelaide, SA, 5000, Australia
| | - Eva Bezak
- Department of Physics, University of Adelaide, Adelaide, SA, 5005, Australia.,Cancer Research Institute and School of Health Sciences, University of South Australia, Adelaide, SA, 5001, Australia
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13
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Xie J, Hung YC. Methodology to evaluate the antimicrobial effectiveness of UV-activated TiO2 nanoparticle-embedded cellulose acetate film. Food Control 2019. [DOI: 10.1016/j.foodcont.2019.06.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Forster JC, Douglass MJJ, Phillips WM, Bezak E. Monte Carlo Simulation of the Oxygen Effect in DNA Damage Induction by Ionizing Radiation. Radiat Res 2018; 190:248-261. [PMID: 29953346 DOI: 10.1667/rr15050.1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
DNA damage induced by ionizing radiation exposure is enhanced in the presence of oxygen (the "oxygen effect"). Despite its practical importance in radiotherapy, the oxygen effect has largely been excluded from models that predict DNA damage from radiation tracks. A Monte Carlo-based algorithm was developed in MATLAB software to predict DNA damage from physical and chemical tracks through a cell nucleus simulated in Geant4-DNA, taking into account the effects of cellular oxygenation (pO2) on DNA radical chemistry processes. An initial spatial distribution of DNA base and sugar radicals was determined by spatially clustering direct events (that deposited at least 10.79 eV) and hydroxyl radical (•OH) interactions. The oxygen effect was modeled by increasing the efficiency with which sugar radicals from direct-type effects were converted to strand breaks from 0.6 to 1, the efficiency with which sugar radicals from the indirect effect were converted to strand breaks from 0.28 to 1 and the efficiency of base-to-sugar radical transfer from •OH-mediated base radicals from 0 to 0.03 with increasing pO2 from 0 to 760 mmHg. The DNA damage induction algorithm was applied to tracks from electrons, protons and alphas with LET values from 0.2 to 150 keV/μm under different pO2 conditions. The oxygen enhancement ratio for double-strand break induction was 3.0 for low-LET radiation up to approximately 15 keV/μm, after which it gradually decreased to a value of 1.3 at 150 keV/μm. These values were consistent with a range of experimental data published in the literature. The DNA damage yields were verified using experimental data in the literature and results from other theoretical models. The spatial clustering approach developed in this work has low memory requirements and may be suitable for particle tracking simulations with a large number of cells.
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Affiliation(s)
- Jake C Forster
- a Department of Physics, University of Adelaide, North Terrace, Adelaide, South Australia 5005, Australia.,b Department of Medical Physics, Royal Adelaide Hospital, North Terrace, Adelaide, South Australia 5000, Australia
| | - Michael J J Douglass
- a Department of Physics, University of Adelaide, North Terrace, Adelaide, South Australia 5005, Australia.,b Department of Medical Physics, Royal Adelaide Hospital, North Terrace, Adelaide, South Australia 5000, Australia
| | - Wendy M Phillips
- a Department of Physics, University of Adelaide, North Terrace, Adelaide, South Australia 5005, Australia.,b Department of Medical Physics, Royal Adelaide Hospital, North Terrace, Adelaide, South Australia 5000, Australia
| | - Eva Bezak
- a Department of Physics, University of Adelaide, North Terrace, Adelaide, South Australia 5005, Australia.,c Cancer Research Institute and School of Health Sciences, University of South Australia, Adelaide, South Australia, Australia
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15
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Selective aerobic oxidation reactions using a combination of photocatalytic water oxidation and enzymatic oxyfunctionalisations. Nat Catal 2017; 1:55-62. [PMID: 29430568 PMCID: PMC5798593 DOI: 10.1038/s41929-017-0001-5] [Citation(s) in RCA: 172] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Peroxygenases offer attractive means to address challenges in selective oxyfunctionalisation chemistry. Despite their attractiveness, the application of peroxygenases in synthetic chemistry remains challenging due to their facile inactivation by the stoichiometric oxidant (H2O2). Often atom inefficient peroxide generation systems are required, which show little potential for large scale implementation. Here we show that visible light-driven, catalytic water oxidation can be used for in situ generation of H2O2 from water, rendering the peroxygenase catalytically active. In this way the stereoselective oxyfunctionalisation of hydrocarbons can be achieved by simply using the catalytic system, water and visible light.
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16
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Kanno T, Nakamura K, Ishiyama K, Yamada Y, Shirato M, Niwano Y, Kayaba C, Ikeda K, Takagi A, Yamaguchi T, Sasaki K. Adjunctive antimicrobial chemotherapy based on hydrogen peroxide photolysis for non-surgical treatment of moderate to severe periodontitis: a randomized controlled trial. Sci Rep 2017; 7:12247. [PMID: 28947757 PMCID: PMC5612933 DOI: 10.1038/s41598-017-12514-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 09/12/2017] [Indexed: 12/14/2022] Open
Abstract
Treatment of severe periodontitis with non-surgical therapy remains challenging in dentistry. The present study aimed to evaluate the clinical efficacy of hydrogen peroxide (H2O2) photolysis-based antimicrobial chemotherapy adjunctively performed with root debridement (RD) for moderate to severe periodontitis. A randomized controlled trial was conducted that included 53 patients with 142 test teeth. The test teeth were randomly assigned to one of three treatment groups: Group 1, RD + H2O2 photolysis; Group 2, RD followed by administration of a local drug delivery system (minocycline chloride gel); or Group 3, RD alone. Clinical and microbiological examination were performed for up to 12 weeks following treatment. Probing pocket depth (PPD) and bleeding on probing (BoP) were improved after each treatment session. At 12 weeks, Group 1 had achieved significantly lower PPDs than the other groups, though there were no significant differences in BoP between Group 1 and the other groups. Counts of Porphyromonas gingivalis, a known periodontal pathogen, in Group 1 were significantly lower than those in Group 3, and were comparable to those in Group 2. Therefore, it is suggested that H2O2 photolysis treatment can be used as a novel adjunctive antimicrobial chemotherapy for non-surgical periodontal treatment.
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Affiliation(s)
- Taro Kanno
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, 4-1 Seiryo, Aoba-ku, Sendai, 980-8575, Japan
| | - Keisuke Nakamura
- Laboratory for Redox Regulation, Tohoku University Graduate School of Dentistry, 4-1 Seiryo, Aoba-ku, Sendai, 980-8575, Japan.
| | - Kirika Ishiyama
- Laboratory for Redox Regulation, Tohoku University Graduate School of Dentistry, 4-1 Seiryo, Aoba-ku, Sendai, 980-8575, Japan
| | - Yasutomo Yamada
- Sweden Dental Sendai (private practice), 1-6-2 Tsutsujigaoka, Miyagino-ku, Sendai, 983-0852, Japan
| | - Midori Shirato
- Laboratory for Redox Regulation, Tohoku University Graduate School of Dentistry, 4-1 Seiryo, Aoba-ku, Sendai, 980-8575, Japan
| | - Yoshimi Niwano
- Laboratory for Redox Regulation, Tohoku University Graduate School of Dentistry, 4-1 Seiryo, Aoba-ku, Sendai, 980-8575, Japan
| | - Chie Kayaba
- Clinical Research, Innovation and Education Center, Tohoku University Hospital, 1-1 Seiryo, Aoba-ku, Sendai, 980-8574, Japan
| | - Koji Ikeda
- Clinical Research, Innovation and Education Center, Tohoku University Hospital, 1-1 Seiryo, Aoba-ku, Sendai, 980-8574, Japan
| | - Airi Takagi
- Clinical Research Data Center, Tohoku University Hospital, 1-1 Seiryo, Aoba-ku, Sendai, 980-8574, Japan
| | - Takuhiro Yamaguchi
- Clinical Research Data Center, Tohoku University Hospital, 1-1 Seiryo, Aoba-ku, Sendai, 980-8574, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo, Aoba-ku, Sendai, 980-8575, Japan
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17
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Shirato M, Nakamura K, Kanno T, Lingström P, Niwano Y, Örtengren U. Time-kill kinetic analysis of antimicrobial chemotherapy based on hydrogen peroxide photolysis against Streptococcus mutans biofilm. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 173:434-440. [DOI: 10.1016/j.jphotobiol.2017.06.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 06/15/2017] [Accepted: 06/21/2017] [Indexed: 01/01/2023]
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18
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Photo-irradiated caffeic acid exhibits antimicrobial activity against Streptococcus mutans biofilms via hydroxyl radical formation. Sci Rep 2017; 7:6353. [PMID: 28743937 PMCID: PMC5527086 DOI: 10.1038/s41598-017-07007-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 06/20/2017] [Indexed: 11/23/2022] Open
Abstract
An antimicrobial technique based on photo-oxidation of caffeic acid (CA) has recently been developed, but its effect on biofilm-forming bacteria is unknown. The present study aimed to evaluate the effect of photo-irradiated CA against Streptococcus mutans (cariogenic bacteria) biofilm as it relates to hydroxyl radical formation. S. mutans biofilms grown on hydroxyapatite disks were immersed in CA solution (0–2 mg/mL) and irradiated with LED light at wavelengths of 365, 385, and 400 nm and at irradiances of 500, 1000, and 2000 mW/cm2 for 4 min. Biofilm viable bacterial counts were determined by colony counting. The yield of hydroxyl radicals generated by the LED irradiation of CA solution was quantified by electron spin resonance analysis. Of the conditions tested, the highest bactericidal effect, with a > 5-log reduction in viable bacterial counts, was obtained by irradiation of a 1 mg/mL CA solution with 385 nm LED and at an irradiance of 2000 mW/cm2. Hydroxyl radical formation was related to this bactericidal effect. The present study suggests that the antimicrobial technique based on the 385 nm LED irradiation of CA is effective against cariogenic biofilms and can be applied as an adjunctive chemotherapy for dental caries.
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19
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Zhang Y, Zheng K, Chen Z, Chen J, Hu P, Cai L, Iqbal Z, Huang M. Rapid killing of bacteria by a new type of photosensitizer. Appl Microbiol Biotechnol 2017; 101:4691-4700. [PMID: 28251266 DOI: 10.1007/s00253-017-8133-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 01/08/2017] [Accepted: 01/10/2017] [Indexed: 12/01/2022]
Abstract
Photodynamic antimicrobial chemotherapy (PACT) uses non-traditional mechanisms (free radicals) and is a highly advocated method with promise of inactivating drug-resistance bacteria for local infections. However, there is no related drug used in clinical practice yet. Therefore, new photosensitizers for PACT are under active development. Here, we report the synthesis of a series of photosensitizers with variable positive charges (ZnPc(TAP)4n+, n = 0, 4, 8, 12) and their inactivation against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria. The binding kinetics of ZnPc(TAP)4n+ to bacteria were measured by flow cytometer. Reactive oxygen species (ROS) generation mechanism of the photosensitizers was studied. The toxicity of these compounds to human blood cells was also evaluated. These compounds showed negligible toxicity against human erythocytes but potent bactericidal effects. The compound with 8 positive charges, ZnPc(TAP)48+, turned out to have the strongest antibacterial effect among this series of compounds, giving IC50 value of 59 nM at a light dosage of 5 J/cm2 toward E. coli. For a multi-resistant E. coli strain, ZnPc(TAP)48+ decreased the bacteria load by 1000-fold at a concentration of 1 μM. Interestingly, ZnPc(TAP)412+, instead of ZnPc(TAP)48+, exhibited the highest amount of binding to bacteria. Flow cytometry studies showed that all PSs have fast binding onto bacteria, reaching saturated binding within 5 min. Mechanistically, ZnPc(TAP)412+ generated ROS primarily via Type I mechanism, while ZnPc(TAP)44+ or ZnPc(TAP)48+ created ROS by both type I and type II mechanisms. ZnPc(TAP)4n+ are highly potent, rapid-acting and non-toxic photosensitizers capable of inactivating bacteria.
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Affiliation(s)
- Yaxin Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
| | - Ke Zheng
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, 266042, China
| | - Zhuo Chen
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
| | - Jincan Chen
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
| | - Ping Hu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
| | - Linrong Cai
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
| | - Zafar Iqbal
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
- Department of Chemistry, COMSATS Institute of Information Technology (CIIT), Abbottabad, KPK, 22060, Pakistan
| | - Mingdong Huang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China.
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350118, China.
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20
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Shan Z, Lu M, Wang L, MacDonald B, MacInnis J, Mkandawire M, Zhang X, Oakes KD. Chloride accelerated Fenton chemistry for the ultrasensitive and selective colorimetric detection of copper. Chem Commun (Camb) 2016; 52:2087-90. [PMID: 26685747 DOI: 10.1039/c5cc07446k] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A highly selective, ultrasensitive (visual and instrumental detection limits of 40 nM and 0.1 nM, respectively), environmentally-friendly, simple and rapid colorimetric sensor was developed for the detection of copper(II) in water. This sensor is based on a novel signal-amplification mechanism involving reactive halide species (RHSs) including chlorides or bromides, which accelerate copper Fenton reactions oxidizing the chromogenic substrate to develop colour. The results of this study expand our understanding of copper-based Fenton chemistry.
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Affiliation(s)
- Zhi Shan
- Verschuren Centre for Sustainability in Energy & the Environment, Cape Breton University, 1250 Grand Lake Rd, Sydney, Nova Scotia B1P 6L2, Canada. and College of Life Science, Sichuan Agriculture University, Yaan 625014, Sichuan, China
| | - Mingsheng Lu
- Verschuren Centre for Sustainability in Energy & the Environment, Cape Breton University, 1250 Grand Lake Rd, Sydney, Nova Scotia B1P 6L2, Canada. and Marine School, Huaihai Institute of Technology, Lianyungang, 222005, China
| | - Li Wang
- Verschuren Centre for Sustainability in Energy & the Environment, Cape Breton University, 1250 Grand Lake Rd, Sydney, Nova Scotia B1P 6L2, Canada. and College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Bruce MacDonald
- Verschuren Centre for Sustainability in Energy & the Environment, Cape Breton University, 1250 Grand Lake Rd, Sydney, Nova Scotia B1P 6L2, Canada.
| | - Judy MacInnis
- Department of Chemistry, Cape Breton University, 1250 Grand Lake Rd, Sydney, Nova Scotia B1P 6L2, Canada
| | - Martin Mkandawire
- Verschuren Centre for Sustainability in Energy & the Environment, Cape Breton University, 1250 Grand Lake Rd, Sydney, Nova Scotia B1P 6L2, Canada.
| | - Xu Zhang
- Verschuren Centre for Sustainability in Energy & the Environment, Cape Breton University, 1250 Grand Lake Rd, Sydney, Nova Scotia B1P 6L2, Canada.
| | - Ken D Oakes
- Verschuren Centre for Sustainability in Energy & the Environment, Cape Breton University, 1250 Grand Lake Rd, Sydney, Nova Scotia B1P 6L2, Canada. and Department of Biology, Cape Breton University, 1250 Grand Lake Rd, Sydney, Nova Scotia B1P 6L2, Canada
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Nakamura K, Ishiyama K, Sheng H, Ikai H, Kanno T, Niwano Y. Bactericidal Activity and Mechanism of Photoirradiated Polyphenols against Gram-Positive and -Negative Bacteria. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:7707-7713. [PMID: 25660393 DOI: 10.1021/jf5058588] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The bactericidal effect of various types of photoirradiated polyphenols against Gram-positive and -negative bacteria was evaluated in relation to the mode of action. Gram-positive bacteria (Enterococcus faecalis, Staphylococcus aureus, and Streptococcus mutans) and Gram-negative bacteria (Aggregatibacter actinomycetemcomitans, Escherichia coli, and Pseudomonas aeruginosa) suspended in a 1 mg/mL polyphenol aqueous solution (caffeic acid, gallic acid, chlorogenic acid, epigallocatechin, epigallocatechin gallate, and proanthocyanidin) were exposed to LED light (wavelength, 400 nm; irradiance, 260 mW/cm(2)) for 5 or 10 min. Caffeic acid and chlorogenic acid exerted the highest bactericidal activity followed by gallic acid and proanthocyanidin against both Gram-positive and -negative bacteria. It was also demonstrated that the disinfection treatment induced oxidative damage of bacterial DNA, which suggests that polyphenols are incorporated into bacterial cells. The present study suggests that blue light irradiation of polyphenols could be a novel disinfection treatment.
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Affiliation(s)
- Keisuke Nakamura
- Laboratory for Redox Regulation, ‡Division of Molecular and Regenerative Prosthodontics, and #Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry , 4-1 Seiryo, Aoba-ku, Sendai 980-8575, Japan
| | - Kirika Ishiyama
- Laboratory for Redox Regulation, ‡Division of Molecular and Regenerative Prosthodontics, and #Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry , 4-1 Seiryo, Aoba-ku, Sendai 980-8575, Japan
| | - Hong Sheng
- Laboratory for Redox Regulation, ‡Division of Molecular and Regenerative Prosthodontics, and #Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry , 4-1 Seiryo, Aoba-ku, Sendai 980-8575, Japan
| | - Hiroyo Ikai
- Laboratory for Redox Regulation, ‡Division of Molecular and Regenerative Prosthodontics, and #Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry , 4-1 Seiryo, Aoba-ku, Sendai 980-8575, Japan
| | - Taro Kanno
- Laboratory for Redox Regulation, ‡Division of Molecular and Regenerative Prosthodontics, and #Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry , 4-1 Seiryo, Aoba-ku, Sendai 980-8575, Japan
| | - Yoshimi Niwano
- Laboratory for Redox Regulation, ‡Division of Molecular and Regenerative Prosthodontics, and #Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry , 4-1 Seiryo, Aoba-ku, Sendai 980-8575, Japan
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22
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Sheng H, Nakamura K, Kanno T, Sasaki K, Niwano Y. Bactericidal Effect of Photolysis of H2O2 in Combination with Sonolysis of Water via Hydroxyl Radical Generation. PLoS One 2015; 10:e0132445. [PMID: 26148024 PMCID: PMC4493093 DOI: 10.1371/journal.pone.0132445] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 06/15/2015] [Indexed: 11/21/2022] Open
Abstract
The bactericidal effect of hydroxyl radical (·OH) generated by combination of photolysis of hydrogen peroxide (H2O2) and sonolysis of water was examined under the condition in which the yield of ·OH increased additively when H2O2 aqueous solution was concomitantly irradiated with laser and ultrasound. The suspension of Staphylococcus aureus mixed with the different concentrations of H2O2 was irradiated simultaneously with a laser light (wavelength: 405 nm, irradiance: 46 and 91 mW/cm2) and ultrasound (power: 30 w, frequency: 1.65 MHz) at 20 ± 1°C of the water bulk temperature for 2 min. The combination of laser and ultrasound irradiation significantly reduced the viable bacterial count in comparison with the laser irradiation of H2O2 alone. By contrast, the ultrasound irradiation alone exerted almost no bactericidal effect. These results suggested that the combination effect of photolysis of H2O2 and sonolysis of water on bactericidal activity was synergistic. A multi-way analysis of variance also revealed that the interaction of H2O2 concentration, laser power and ultrasound irradiation significantly affected the bactericidal activity. Since the result of oxidative DNA damage evaluation demonstrated that the combination of laser and ultrasound irradiation significantly induced oxidative damage of bacterial DNA in comparison with the laser irradiation of H2O2 alone, it was suggested that the combination effect of photolysis of H2O2 and sonolysis of water on bactericidal activity would be exerted via oxidative damage of cellular components such as DNA.
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Affiliation(s)
- Hong Sheng
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
- * E-mail:
| | - Keisuke Nakamura
- Laboratory for Redox Regulation, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - Taro Kanno
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - Yoshimi Niwano
- Laboratory for Redox Regulation, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
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Kasimova KR, Sadasivam M, Landi G, Sarna T, Hamblin MR. Potentiation of photoinactivation of Gram-positive and Gram-negative bacteria mediated by six phenothiazinium dyes by addition of azide ion. Photochem Photobiol Sci 2015; 13:1541-8. [PMID: 25177833 DOI: 10.1039/c4pp00021h] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Antimicrobial photodynamic inactivation (APDI) using phenothiazinium dyes is mediated by reactive oxygen species consisting of a combination of singlet oxygen (quenched by azide), hydroxyl radicals and other reactive oxygen species. We recently showed that addition of sodium azide paradoxically potentiated APDI of Gram-positive and Gram-negative bacteria using methylene blue as the photosensitizer, and this was due to electron transfer to the dye triplet state from azide anion, producing azidyl radical. Here we compare this effect using six different homologous phenothiazinium dyes: methylene blue, toluidine blue O, new methylene blue, dimethylmethylene blue, azure A, and azure B. We found both significant potentiation (up to 2 logs) and also significant inhibition (>3 logs) of killing by adding 10 mM azide depending on Gram classification, washing the dye from the cells, and dye structure. Killing of E. coli was potentiated with all 6 dyes after a wash, while S. aureus killing was only potentiated by MB and TBO with a wash and DMMB with no wash. More lipophilic dyes (higher log P value, such as DMMB) were more likely to show potentiation. We conclude that the Type I photochemical mechanism (potentiation with azide) likely depends on the microenvironment, i.e. higher binding of dye to bacteria. Bacterial dye-binding is thought to be higher with Gram-negative compared to Gram-positive bacteria, when unbound dye has been washed away, and with more lipophilic dyes.
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Affiliation(s)
- Kamola R Kasimova
- The Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, USA.
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24
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Li K, Zhang YY, Jiang GY, Hou YJ, Zhang BW, Zhou QX, Wang XS. A bivalent cationic dye enabling selective photo-inactivation against Gram-negative bacteria. Chem Commun (Camb) 2015; 51:7923-6. [DOI: 10.1039/c5cc00174a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Selective photoinactivation against Gram-negative bacteria over Gram-positive bacteria was successfully realized by a bivalent triarylmethane dye.
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Affiliation(s)
- Ke Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Yang-Yang Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Guo-Yu Jiang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Yuan-Jun Hou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Bao-Wen Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Qian-Xiong Zhou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Xue-Song Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
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25
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Xu E, Lv Y, Liu J, Gu X, Zhang S. An electrochemical study based on thymine–Hg–thymine DNA base pair mediated charge transfer processes. RSC Adv 2015. [DOI: 10.1039/c5ra06238a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The (TT)n might have more π-overlapping than the corresponding matched base pairs, and the intercalation of Hg(ii) into TT may further increase this overlapping, causing faster CT kinetics.
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Affiliation(s)
- Ensheng Xu
- Department of Chemistry
- Liaocheng University
- Liaocheng
- China
| | - Yanqin Lv
- Department of Chemistry
- Liaocheng University
- Liaocheng
- China
| | - Jifeng Liu
- Department of Chemistry
- Liaocheng University
- Liaocheng
- China
- Key Laboratory of Food Nutrition and Safety
| | - Xiaohong Gu
- Shandong Provincial Key Lab of Test Technology on Food Quality and Safety
- Shandong Academy of Agricultural Sciences
- Jinan 250100
- China
| | - Shuqiu Zhang
- Shandong Provincial Key Lab of Test Technology on Food Quality and Safety
- Shandong Academy of Agricultural Sciences
- Jinan 250100
- China
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26
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Ortelli S, Blosi M, Delpivo C, Gardini D, Dondi M, Gualandi I, Tonelli D, Aina V, Fenoglio I, Gandhi AA, Tofail SA, Costa A. Multiple approach to test nano TiO2 photo-activity. J Photochem Photobiol A Chem 2014. [DOI: 10.1016/j.jphotochem.2014.07.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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27
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Angelé-Martínez C, Goodman C, Brumaghim J. Metal-mediated DNA damage and cell death: mechanisms, detection methods, and cellular consequences. Metallomics 2014; 6:1358-81. [DOI: 10.1039/c4mt00057a] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Metal ions cause various types of DNA damage by multiple mechanisms, and this damage is a primary cause of cell death and disease.
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Affiliation(s)
| | - Craig Goodman
- Department of Chemistry
- Clemson University
- Clemson, USA
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28
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Ma W, Han D, Zhang N, Li F, Wu T, Dong X, Niu L. Bionic radical generation and antioxidant capacity sensing with photocatalytic graphene oxide–titanium dioxide composites under visible light. Analyst 2013; 138:2335-42. [DOI: 10.1039/c3an00108c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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29
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Ochiai T, Fujishima A. Photoelectrochemical properties of TiO2 photocatalyst and its applications for environmental purification. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2012. [DOI: 10.1016/j.jphotochemrev.2012.07.001] [Citation(s) in RCA: 347] [Impact Index Per Article: 28.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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30
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Cardoso AR, Chausse B, da Cunha FM, Luévano-Martínez LA, Marazzi TBM, Pessoa PS, Queliconi BB, Kowaltowski AJ. Mitochondrial compartmentalization of redox processes. Free Radic Biol Med 2012; 52:2201-8. [PMID: 22564526 DOI: 10.1016/j.freeradbiomed.2012.03.008] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Revised: 03/05/2012] [Accepted: 03/06/2012] [Indexed: 12/25/2022]
Abstract
Knowledge of location and intracellular subcompartmentalization is essential for the understanding of redox processes, because oxidants, owing to their reactive nature, must be generated close to the molecules modified in both signaling and damaging processes. Here we discuss known redox characteristics of various mitochondrial microenvironments. Points covered are the locations of mitochondrial oxidant generation, characteristics of antioxidant systems in various mitochondrial compartments, and diffusion characteristics of oxidants in mitochondria. We also review techniques used to measure redox state in mitochondrial subcompartments, antioxidants targeted to mitochondrial subcompartments, and methodological concerns that must be addressed when using these tools.
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31
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Wang J, Zhao WW, Li XR, Xu JJ, Chen HY. Potassium-doped graphene enhanced electrochemiluminescence of SiO(2)@CdS nanocomposites for sensitive detection of TATA-binding protein. Chem Commun (Camb) 2012; 48:6429. [PMID: 22618486 DOI: 10.1039/c2cc32767h] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Based on the amplified signal from SiO(2)@CdS nanocomposites integrated with K-doped graphene, a new electrochemiluminescence biosensor was developed for the successful detection of transcription factor TATA-binding protein (TBP).
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Affiliation(s)
- Jing Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
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