1
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Man JN, Zhu J, Weng GJ, Li JJ, Zhao JW. Using gold-based nanomaterials for fighting pathogenic bacteria: from detection to therapy. Mikrochim Acta 2024; 191:627. [PMID: 39325115 DOI: 10.1007/s00604-024-06713-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2024] [Accepted: 09/14/2024] [Indexed: 09/27/2024]
Abstract
Owing to the unique quantum size effect and surface effect, gold-based nanomaterials (GNMs) are promising for pathogen detection and broad-spectrum antimicrobial activity. This review summarizes recent research on GNMs as sensors for detecting pathogens and as tools for their elimination. Firstly, the need for pathogen detection is briefly introduced with an overview of the physicochemical properties of gold nanomaterials. And then strategies for the application of GNMs in pathogen detection are discussed. Colorimetric, fluorescence, surface-enhanced Raman scattering (SERS) techniques, dark-field microscopy detection and electrochemical methods can enable efficient, sensitive, and specific pathogen detection. The third section describes the antimicrobial applications of GNMs. They can be used for antimicrobial agent delivery and photothermal conversion and can act synergistically with photosensitizers to achieve the precise killing of pathogens. In addition, GNMs are promising for integrated pathogen detection and treatment; for example, combinations of colorimetric or SERS detection with photothermal sterilization have been demonstrated. Finally, future outlooks for the applications of GNMs in pathogen detection and treatment are summarized.
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Affiliation(s)
- Jia-Ni Man
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Jian Zhu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China.
| | - Guo-Jun Weng
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Jian-Jun Li
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Jun-Wu Zhao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
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2
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Yan R, Zhan M, Xu J, Peng Q. Functional nanomaterials as photosensitizers or delivery systems for antibacterial photodynamic therapy. BIOMATERIALS ADVANCES 2024; 159:213820. [PMID: 38430723 DOI: 10.1016/j.bioadv.2024.213820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 02/09/2024] [Accepted: 02/27/2024] [Indexed: 03/05/2024]
Abstract
Bacterial infection is a global health problem that closely related to various diseases threatening human life. Although antibiotic therapy has been the mainstream treatment method for various bacterial infectious diseases for decades, the increasing emergence of bacterial drug resistance has brought enormous challenges to the application of antibiotics. Therefore, developing novel antibacterial strategies is of great importance. By producing reactive oxygen species (ROS) with photosensitizers (PSs) under light irradiation, antibacterial photodynamic therapy (aPDT) has emerged as a non-invasive and promising approach for treating bacterial infections without causing drug resistance. However, the insufficient therapeutic penetration, poor hydrophilicity, and poor biocompatibility of traditional PSs greatly limit the efficacy of aPDT. Recently, studies have found that nanomaterials with characteristics of favorable photocatalytic activity, surface plasmonic resonance, easy modification, and high drug loading capacity can improve the therapeutic efficacy of aPDT. In this review, we aim to provide a comprehensive understanding of the mechanism of nanomaterials-mediated aPDT and summarize the representative nanomaterials in aPDT, either as PSs or carriers for PSs. In addition, the combination of advanced nanomaterials-mediated aPDT with other therapies, including targeted therapy, gas therapy, and multidrug resistance (MDR) therapy, is reviewed. Also, the concerns and possible solutions of nanomaterials-based aPDT are discussed. Overall, this review may provide theoretical basis and inspiration for the development of nanomaterials-based aPDT.
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Affiliation(s)
- Ruijiao Yan
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Meijun Zhan
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Jingchen Xu
- Department of Dental Medical Center, China-Japan Friendship Hospital, Beijing 100029, China.
| | - Qiang Peng
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
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3
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Safari MS, Mohabatkar H, Behbahani M. Novel surface biochemical modifications of urinary catheters to prevent catheter-associated urinary tract infections. J Biomed Mater Res B Appl Biomater 2024; 112:e35372. [PMID: 38359168 DOI: 10.1002/jbm.b.35372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 11/13/2023] [Accepted: 01/02/2024] [Indexed: 02/17/2024]
Abstract
More than 70% of hospital-acquired urinary tract infections are related to urinary catheters, which are commonly used for the treatment of about 20% of hospitalized patients. Urinary catheters are used to drain the bladder if there is an obstruction in the tube that carries urine out of the bladder (urethra). During catheter-associated urinary tract infections, microorganisms rise up in the urinary tract and reach the bladder, and cause infections. Various materials are used to fabricate urinary catheters such as silicone, polyurethane, and latex. These materials allow bacteria and fungi to develop colonies on their inner and outer surfaces, leading to bacteriuria or other infections. Urinary catheters could be modified to exert antibacterial and antifungal effects. Although so many research have been conducted over the past years on the fabrication of antibacterial and antifouling catheters, an ideal catheter needs to be developed for long-term catheterization of more than a month. In this review, we are going to introduce the recent advances in fabricating antibacterial materials to prevent catheter-associated urinary tract infections, such as nanoparticles, antibiotics, chemical compounds, antimicrobial peptides, bacteriophages, and plant extracts.
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Affiliation(s)
- Mohammad Sadegh Safari
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Hassan Mohabatkar
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Mandana Behbahani
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
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4
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Sadeghi MS, Lotfi M, Soltani N, Farmani E, Fernandez JHO, Akhlaghitehrani S, Mohammed SH, Yasamineh S, Kalajahi HG, Gholizadeh O. Recent advances on high-efficiency of microRNAs in different types of lung cancer: a comprehensive review. Cancer Cell Int 2023; 23:284. [PMID: 37986065 PMCID: PMC10661689 DOI: 10.1186/s12935-023-03133-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 11/09/2023] [Indexed: 11/22/2023] Open
Abstract
Carcinoma of the lung is among the most common types of cancer globally. Concerning its histology, it is categorized as a non-small cell carcinoma (NSCLC) and a small cell cancer (SCLC) subtype. MicroRNAs (miRNAs) are a member of non-coding RNA whose nucleotides range from 19 to 25. They are known to be critical regulators of cancer via epigenetic control of oncogenes expression and by regulating tumor suppressor genes. miRNAs have an essential function in a tumorous microenvironment via modulating cancer cell growth, metastasis, angiogenesis, metabolism, and apoptosis. Moreover, a wide range of information produced via several investigations indicates their tumor-suppressing, oncogenic, diagnostic assessment, and predictive marker functions in different types of lung malignancy. miRNA mimics or anti-miRNAs can be transferred into a lung cancer cell, with possible curative implications. As a result, miRNAs hold promise as targets for lung cancer treatment and detection. In this study, we investigate the different functions of various miRNAs in different types of lung malignancy, which have been achieved in recent years that show the lung cancer-associated regulation of miRNAs expression, concerning their function in lung cancer beginning, development, and resistance to chemotherapy, also the probability to utilize miRNAs as predictive biomarkers for therapy reaction.
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Affiliation(s)
- Mohammad Saleh Sadeghi
- Department of Pharmaceutics, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohadeseh Lotfi
- School of Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Narges Soltani
- School of Allied Medical Sciences, Tehran University of Medical Sciences, Tehran, Iran
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5
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Nasiri K, Masoumi SM, Amini S, Goudarzi M, Tafreshi SM, Bagheri A, Yasamineh S, Alwan M, Arellano MTC, Gholizadeh O. Recent advances in metal nanoparticles to treat periodontitis. J Nanobiotechnology 2023; 21:283. [PMID: 37605182 PMCID: PMC10440939 DOI: 10.1186/s12951-023-02042-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 07/31/2023] [Indexed: 08/23/2023] Open
Abstract
The gradual deterioration of the supporting periodontal tissues caused by periodontitis, a chronic multifactorial inflammatory disease, is thought to be triggered by the colonization of dysbiotic plaque biofilms in a vulnerable host. One of the most prevalent dental conditions in the world, periodontitis is now the leading factor in adult tooth loss. When periodontitis does develop, it is treated by scraping the mineralized deposits and dental biofilm off the tooth surfaces. Numerous studies have shown that non-surgical treatment significantly improves clinical and microbiological indices in individuals with periodontitis. Although periodontal parameters have significantly improved, certain bacterial reservoirs often persist on root surfaces even after standard periodontal therapy. Periodontitis has been treated with local or systemic antibiotics as well as scaling and root planning. Since there aren't many brand-new antibiotics on the market, several researchers are currently concentrating on creating alternate methods of combating periodontal germs. There is a delay in a study on the subject of nanoparticle (NP) toxicity, which is especially concerned with mechanisms of action, while the area of nanomedicine develops. The most promising of them are metal NPs since they have potent antibacterial action. Metal NPs may be employed as efficient growth inhibitors in a variety of bacteria, making them useful for the treatment of periodontitis. In this way, the new metal NPs contributed significantly to the development of efficient anti-inflammatory and antibacterial platforms for the treatment of periodontitis. The current therapeutic effects of several metallic NPs on periodontitis are summarized in this study. This data might be used to develop NP-based therapeutic alternatives for the treatment of periodontal infections.
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Affiliation(s)
- Kamyar Nasiri
- Department of Dentistry, Islamic Azad University, Tehran, Iran
| | | | - Sara Amini
- School of Science and Engineering, Duquesne University, Pittsburgh, PA, USA
| | - Mina Goudarzi
- School of Dentistry, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyed Mobin Tafreshi
- School of Dentistry, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas Bagheri
- Department of Endodontics, School of Dentistry, Shahid Sadoughi University of Medical, Yazd, Iran
| | - Saman Yasamineh
- Research Center for Clinical Virology, Tehran University of Medical Sciences, Tehran, Iran
| | - Mariem Alwan
- Medical Technical College, Al-Farahidi University, Baghdad, Iraq
| | | | - Omid Gholizadeh
- Research Center for Clinical Virology, Tehran University of Medical Sciences, Tehran, Iran.
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6
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Calori IR, Braga G, Tessaro AL, Caetano W, Tedesco AC, Hioka N. Self-aggregation of the proteolytic forms of Verteporfin: An in silico and in vitro study. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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7
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Ghayyem S, Barras A, Faridbod F, Szunerits S, Boukherroub R. Effective PDT/PTT dual-modal phototherapeutic killing of bacteria by using poly(N-phenylglycine) nanoparticles. Mikrochim Acta 2022; 189:150. [PMID: 35304680 DOI: 10.1007/s00604-022-05181-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 01/07/2022] [Indexed: 10/18/2022]
Abstract
This study investigated, for the first time, the antimicrobial properties of polyethylene glycol-functionalized poly(N-phenylglycine) nanoparticles (PNPG-PEG NPs). PNPG-PEG NPs exhibit high extinction coefficient in the near-infrared (NIR) region; they can convert light energy into heat energy with high thermal transformation efficiency. Additionally, they can generate cytotoxic reactive oxygen species (ROS) upon light irradiation. Also, PNPG-PEG NPs are not cytotoxic. All these properties make them appropriate for combined dual-modal photothermal and photodynamic therapies. The antibacterial activity of PNPG-PEG NPs was assessed using Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) pathogenic strains. The results revealed that NIR light (810 nm) irradiation for 10 min could kill effectively the planktonic bacteria and destroy Escherichia coli and Staphylococcus aureus biofilms. The results demonstrated that PNPG-PEG NPs represent a very effective nanoplatform for killing of pathogenic bacteria.
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Affiliation(s)
- Sena Ghayyem
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000, Lille, France.,Analytical Chemistry Department, School of Chemistry, College of Science, University of Tehran, 1417935840, Tehran, Iran
| | - Alexandre Barras
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000, Lille, France
| | - Farnoush Faridbod
- Analytical Chemistry Department, School of Chemistry, College of Science, University of Tehran, 1417935840, Tehran, Iran
| | - Sabine Szunerits
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000, Lille, France
| | - Rabah Boukherroub
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000, Lille, France.
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8
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Zheng J, Cheng X, Zhang H, Bai X, Ai R, Shao L, Wang J. Gold Nanorods: The Most Versatile Plasmonic Nanoparticles. Chem Rev 2021; 121:13342-13453. [PMID: 34569789 DOI: 10.1021/acs.chemrev.1c00422] [Citation(s) in RCA: 184] [Impact Index Per Article: 61.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Gold nanorods (NRs), pseudo-one-dimensional rod-shaped nanoparticles (NPs), have become one of the burgeoning materials in the recent years due to their anisotropic shape and adjustable plasmonic properties. With the continuous improvement in synthetic methods, a variety of materials have been attached around Au NRs to achieve unexpected or improved plasmonic properties and explore state-of-the-art technologies. In this review, we comprehensively summarize the latest progress on Au NRs, the most versatile anisotropic plasmonic NPs. We present a representative overview of the advances in the synthetic strategies and outline an extensive catalogue of Au-NR-based heterostructures with tailored architectures and special functionalities. The bottom-up assembly of Au NRs into preprogrammed metastructures is then discussed, as well as the design principles. We also provide a systematic elucidation of the different plasmonic properties associated with the Au-NR-based structures, followed by a discussion of the promising applications of Au NRs in various fields. We finally discuss the future research directions and challenges of Au NRs.
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Affiliation(s)
- Jiapeng Zheng
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Xizhe Cheng
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Han Zhang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Xiaopeng Bai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Ruoqi Ai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Lei Shao
- Beijing Computational Science Research Center, Beijing 100193, China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
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9
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Zhou Y, Wang Z, Peng Y, Wang F, Deng L. Gold Nanomaterials as a Promising Integrated Tool for Diagnosis and Treatment of Pathogenic Infections-A Review. J Biomed Nanotechnol 2021; 17:744-770. [PMID: 34082865 DOI: 10.1166/jbn.2021.3075] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This review summarizes research on functionalized gold nanomaterials as pathogen detection sensors and pathogen elimination integrated tools. After presenting the challenge of current severe threat from pathogenic bacteria and the increasingly serious growth rate of drug resistance, the first section mainly introduces the conspectus of gold nanostructures from synthesis, characterization, physicochemical properties and applications of gold nanomaterials. The next section deals with gold nanomaterials-based pathogen detection sensors such as colorimetric sensors, fluorescence sensors and Surface-Enhanced Raman Scattering sensors. We then discuss strategies based on gold nanomaterials for eliminating pathogenic infections, such as the dual sterilization strategy for grafting gold nanomaterials with antibacterial substances, photothermal antibacterial and photodynamic antibacterial methods. The fourth part briefly introduces the comprehensive strategy for diagnosis and sterilization of pathogen infection based on gold nanomaterials, such as the diagnosis and treatment strategy for pathogen infection using Roman signals real-time monitoring and photothermal sterilization. A concluding section that summarizes the current status and challenges of the novel diagnosis and treatment integrated strategy for pathogenic infections, gives an outlook on potential future perspectives.
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Affiliation(s)
- Yan Zhou
- Department of Microbiology, College of Life Science, Hunan Normal University, Changsha 410081, Hunan, China
| | - Zefeng Wang
- Department of Microbiology, College of Life Science, Hunan Normal University, Changsha 410081, Hunan, China
| | - Yanling Peng
- Department of Microbiology, College of Life Science, Hunan Normal University, Changsha 410081, Hunan, China
| | - Feiying Wang
- Department of Microbiology, College of Life Science, Hunan Normal University, Changsha 410081, Hunan, China
| | - Le Deng
- Department of Microbiology, College of Life Science, Hunan Normal University, Changsha 410081, Hunan, China
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10
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Sánchez SV, Navarro N, Catalán-Figueroa J, Morales JO. Nanoparticles as Potential Novel Therapies for Urinary Tract Infections. Front Cell Infect Microbiol 2021; 11:656496. [PMID: 33954121 PMCID: PMC8089393 DOI: 10.3389/fcimb.2021.656496] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 03/23/2021] [Indexed: 12/21/2022] Open
Abstract
Urinary tract infection (UTI) is one of the most common reasons for antibiotic treatment. Nevertheless, uropathogens are steadily becoming resistant to currently available therapies. In this context, nanotechnology emerges as an innovative and promising approach among diverse strategies currently under development. In this review we deeply discuss different nanoparticles (NPs) used in UTI treatment, including organic NPs, nanodiamonds, chemical and green synthesized inorganic NPs, and NPs made of composite materials. In addition, we compare the effects of different NPs against uropathogens in vivo and in vitro and discuss their potential impact the in the near future.
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Affiliation(s)
- Sofía V Sánchez
- Department of Pharmaceutical Science and Technology, School of Chemical and Pharmaceutical Sciences, University of Chile, Santiago, Chile.,Center of New Drugs for Hypertension (CENDHY), Santiago, Chile.,Advanced Center for Chronic Diseases (ACCDiS), Santiago, Chile
| | - Nicolás Navarro
- Department of Pharmaceutical Science and Technology, School of Chemical and Pharmaceutical Sciences, University of Chile, Santiago, Chile.,Center of New Drugs for Hypertension (CENDHY), Santiago, Chile.,Advanced Center for Chronic Diseases (ACCDiS), Santiago, Chile
| | - Johanna Catalán-Figueroa
- Departamento Farmacología, Facultad de Ciencias Químicas, Instituto de Farmacología experimental de Córdoba (IFEC-CONICET), Universidad Nacional de Córdoba, Córdoba, Argentina.,Facultad de Medicina, Escuela de Química y Farmacia, Universidad Católica del Maule, Talca, Chile
| | - Javier O Morales
- Department of Pharmaceutical Science and Technology, School of Chemical and Pharmaceutical Sciences, University of Chile, Santiago, Chile.,Center of New Drugs for Hypertension (CENDHY), Santiago, Chile.,Advanced Center for Chronic Diseases (ACCDiS), Santiago, Chile
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11
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An X, Erramilli S, Reinhard BM. Plasmonic nano-antimicrobials: properties, mechanisms and applications in microbe inactivation and sensing. NANOSCALE 2021; 13:3374-3411. [PMID: 33538743 PMCID: PMC8349509 DOI: 10.1039/d0nr08353d] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Bacterial, viral and fungal infections pose serious threats to human health and well-being. The continuous emergence of acute infectious diseases caused by pathogenic microbes and the rapid development of resistances against conventional antimicrobial drugs necessitates the development of new and effective strategies for the safe elimination of microbes in water, food or on surfaces, as well as for the inactivation of pathogenic microbes in human hosts. The need for new antimicrobials has triggered the development of plasmonic nano-antimicrobials that facilitate both light-dependent and -independent microbe inactivation mechanisms. This review introduces the relevant photophysical mechanisms underlying these plasmonic nano-antimicrobials, and provides an overview of how the photoresponses and materials properties of plasmonic nanostructures can be applied in microbial pathogen inactivation and sensing applications. Through a systematic analysis of the inactivation efficacies of different plasmonic nanostructures, this review outlines the current state-of-the-art in plasmonic nano-antimicrobials and defines the application space for different microbial inactivation strategies. The advantageous optical properties of plasmonic nano-antimicrobials also enhance microbial detection and sensing modalities and thus help to avoid exposure to microbial pathogens. Sensitive and fast plasmonic microbial sensing modalities and their theranostic and targeted therapeutic applications are discussed.
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Affiliation(s)
- Xingda An
- Department of Chemistry, Boston University, Boston, MA 02215, USA. and The Photonics Center, Boston University, Boston, MA 02215, USA
| | - Shyamsunder Erramilli
- Department of Physics, Boston University, Boston, MA 02215, USA and The Photonics Center, Boston University, Boston, MA 02215, USA
| | - Björn M Reinhard
- Department of Chemistry, Boston University, Boston, MA 02215, USA. and The Photonics Center, Boston University, Boston, MA 02215, USA
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12
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Ran B, Yuan Y, Xia W, Li M, Yao Q, Wang Z, Wang L, Li X, Xu Y, Peng X. A photo-sensitizable phage for multidrug-resistant Acinetobacter baumannii therapy and biofilm ablation. Chem Sci 2020; 12:1054-1061. [PMID: 34163871 PMCID: PMC8179032 DOI: 10.1039/d0sc04889e] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Antibiotic abuse causes the emergence of bacterial resistance. Photodynamic antibacterial chemotherapy (PACT) has great potential to solve serious bacterial resistance, but it suffers from the inefficient generation of ROS and the lack of bacterial targeting ability. Herein, a unique cationic photosensitizer (NB) and bacteriophage (ABP)-based photodynamic antimicrobial agent (APNB) is developed for precise bacterial eradication and efficient biofilm ablation. Thanks to the structural modification of the NB photosensitizer with a sulfur atom, it displays excellent reactive oxygen species (ROS)-production ability. Moreover, specific binding to pathogenic microorganisms can be provided by bacteriophages. The developed APNB has multiple functions, including bacteria targeting, near-infrared fluorescence imaging and combination therapy (PACT and phage therapy). Both in vitro and in vivo experiments prove that APNB can efficiently treat A. baumannii infection. Particularly, the recovery from A. baumannii infection after APNB treatment is faster than that with ampicillin and polymyxin B in vivo. Furthermore, the strategy of combining bacteriophages and photosensitizers is employed to eradicate bacterial biofilms for the first time, and it shows the excellent biofilm ablation effect as expected. Thus, APNB has huge potential in fighting against multidrug-resistant bacteria and biofilm ablation in practice. APNB for multidrug-resistant A. Baumannii therapy and biofilms ablation.![]()
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Affiliation(s)
- Bei Ran
- State Key Laboratory of Fine Chemicals, Dalian University of Technology Dalian 116024 China
| | - Yuyu Yuan
- School of Bioengineering, Dalian University of Technology Dalian 116024 China
| | - Wenxi Xia
- State Key Laboratory of Fine Chemicals, Dalian University of Technology Dalian 116024 China
| | - Mingle Li
- State Key Laboratory of Fine Chemicals, Dalian University of Technology Dalian 116024 China
| | - Qichao Yao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology Dalian 116024 China
| | - Zuokai Wang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology Dalian 116024 China
| | - Lili Wang
- School of Bioengineering, Dalian University of Technology Dalian 116024 China
| | - Xiaoyu Li
- School of Bioengineering, Dalian University of Technology Dalian 116024 China
| | - Yongping Xu
- School of Bioengineering, Dalian University of Technology Dalian 116024 China
| | - Xiaojun Peng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology Dalian 116024 China
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13
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Bogoeva V, Petrova L, Bouckaert J, Yordanova A, Ivanov I, Vanderesse R, Frochot C. Dual function of lectins — new perspectives in targeted photodynamic therapy. J PORPHYR PHTHALOCYA 2020. [DOI: 10.1142/s1088424619300209] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Porphyrins and phthalocyanines are photosensitizers (PS) that are used in clinical imaging, detection of cancer cells and are particularly applied in photodynamic therapy (PDT). Many scientists have been focused on the design of different porphyrin compounds. However, similar to other anti-cancer agents, they cannot selectively recognize tumor tissues. Scientists are seeking new methods to overcome this problem and to find appropriate targeted delivery strategies. Plant lectins are especially suitable molecules for such targeting as they preferentially recognize specific antigens on the glycosylated cancer cells. This review will give more detailed information about the dual function of lectins and their interactions with PSs, which is a new perspective in targeted PDT. The implications and potential applications of such studies will also be discussed.
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Affiliation(s)
- Vanya Bogoeva
- Institute of Molecular Biology “Roumen Tsanev”, Bulgarian Academy of Sciences, “Acad. G. Bonchev”, Str. Bl. 21, 1113, Sofia, Bulgaria
| | - Lidiya Petrova
- Medical University of Pleven, Department of Anatomy, Histology, Cytology and Biology, 1, “Sv. Kliment Ohridski Str.”, 5800 Pleven, Bulgaria
| | - Julie Bouckaert
- Unité de Glycobiologie Structurale et Fonctionelle (UGSF), UMR 8576 of the University of Lille and CNRS, 50 Av. de Halley, 59658 Villeneuve d’Ascq, France
| | - Anna Yordanova
- Institute of Molecular Biology “Roumen Tsanev”, Bulgarian Academy of Sciences, “Acad. G. Bonchev”, Str. Bl. 21, 1113, Sofia, Bulgaria
| | - Ivan Ivanov
- Institute of Catalysis, Bulgarian Academy of Sciences, “Acad. G. Bonchev” Str., 1113, Sofia, Bulgaria
| | - Régis Vanderesse
- LCPM UMR 7375 CNRS-University of Lorraine, 1 rue Grandville, BP20451 54001 Nancy CEDEX, France
| | - Céline Frochot
- LRGP UMR 7274 CNRS-University of Lorraine, 1 rue Grandville, BP20451 54001 Nancy CEDEX, France
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Qi M, Chi M, Sun X, Xie X, Weir MD, Oates TW, Zhou Y, Wang L, Bai Y, Xu HHK. Novel nanomaterial-based antibacterial photodynamic therapies to combat oral bacterial biofilms and infectious diseases. Int J Nanomedicine 2019; 14:6937-6956. [PMID: 31695368 PMCID: PMC6718167 DOI: 10.2147/ijn.s212807] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 08/06/2019] [Indexed: 01/03/2023] Open
Abstract
Oral diseases such as tooth caries, periodontal diseases, endodontic infections, etc., are prevalent worldwide. The heavy burden of oral infectious diseases and their consequences on the patients' quality of life indicates a strong need for developing effective therapies. Advanced understandings of such oral diseases, e.g., inflammatory periodontal lesions, have raised the demand for antibacterial therapeutic strategies, because these diseases are caused by viruses and bacteria. The application of antimicrobial photodynamic therapy (aPDT) on oral infectious diseases has attracted tremendous interest in the past decade. However, aPDT had a minimal effect on the viability of organized biofilms due to the hydrophobic nature of the majority of the photosensitizers (PSs). Therefore, novel nanotechnologies were rapidly developed to target the delivery of hydrophobic PSs into microorganisms for the antimicrobial performance improvement of aPDT. This review focuses on the state-of-the-art of nanomaterials applications in aPDT against oral infectious diseases. The first part of this article focuses on the cutting-edge research on the synthesis, toxicity, and therapeutic effects of various forms of nanomaterials serving as PS carriers for aPDT applications. The second part discusses nanomaterials applications for aPDT in treatments of oral diseases. These novel bioactive nanomaterials have demonstrated great potential to serve as carriers for PSs to substantially enhance the PDT therapeutic effects. Furthermore, the novel aPDT applications not only have exciting therapeutic potential to inhibit bacterial plaque-initiated oral diseases, but also have a wide applicability to other biomedical and tissue engineering applications.
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Affiliation(s)
- Manlin Qi
- Department of Oral Implantology, School and Hospital of Stomatology, Jilin University, Changchun130021, People’s Republic of China
- Jilin Provincial Key Laboratory of Sciences and Technology for Stomatology Nanoengineering, Changchun130021, People’s Republic of China
| | - Minghan Chi
- Department of Oral Implantology, School and Hospital of Stomatology, Jilin University, Changchun130021, People’s Republic of China
- Jilin Provincial Key Laboratory of Sciences and Technology for Stomatology Nanoengineering, Changchun130021, People’s Republic of China
| | - Xiaolin Sun
- Department of Oral Implantology, School and Hospital of Stomatology, Jilin University, Changchun130021, People’s Republic of China
- Jilin Provincial Key Laboratory of Sciences and Technology for Stomatology Nanoengineering, Changchun130021, People’s Republic of China
| | - Xianju Xie
- Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing, People’s Republic of China
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD21201, USA
| | - Michael D Weir
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD21201, USA
| | - Thomas W Oates
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD21201, USA
| | - Yanmin Zhou
- Department of Oral Implantology, School and Hospital of Stomatology, Jilin University, Changchun130021, People’s Republic of China
- Jilin Provincial Key Laboratory of Sciences and Technology for Stomatology Nanoengineering, Changchun130021, People’s Republic of China
| | - Lin Wang
- Department of Oral Implantology, School and Hospital of Stomatology, Jilin University, Changchun130021, People’s Republic of China
- Jilin Provincial Key Laboratory of Sciences and Technology for Stomatology Nanoengineering, Changchun130021, People’s Republic of China
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD21201, USA
| | - Yuxing Bai
- Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing, People’s Republic of China
| | - Hockin HK Xu
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD21201, USA
- Center for Stem Cell Biology and Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD21201, USA
- University of Maryland Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD21201, USA
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15
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Annesi F, Pane A, Losso MA, Guglielmelli A, Lucente F, Petronella F, Placido T, Comparelli R, Guzzo MG, Curri ML, Bartolino R, De Sio L. Thermo-Plasmonic Killing of Escherichia coli TG1 Bacteria. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E1530. [PMID: 31083308 PMCID: PMC6539421 DOI: 10.3390/ma12091530] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 04/27/2019] [Accepted: 05/06/2019] [Indexed: 11/16/2022]
Abstract
Plasmonic photo-thermal therapy (PPTT) is a minimally invasive, drug-free, therapy based on the properties of noble metal nanoparticles, able to convert a bio-transparent electromagnetic radiation into heat. PPTT has been used against cancer and other diseases. Herein, we demonstrate an antimicrobial methodology based on the properties of gold nanorods (GNRs). Under a resonant laser irradiation GNRs become highly efficient light to heat nano-converters extremely useful for PPTT applications. The concept here is to assess the antimicrobial effect of easy to synthesize, suitably purified, water-dispersible GNRs on Escherichia coli bacteria. A control on the GNRs concentration used for the process has been demonstrated critical in order to rule out cytotoxic effects on the cells, and still to be able to generate, under a near infrared illumination, an adequate amount of heat suited to increase the temperature up to ≈50 °C in about 5 min. Viability experiments evidenced that the proposed system accomplished a killing efficiency suitable to reducing the Escherichia coli population of about 2 log CFU (colony-forming unit).
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Affiliation(s)
- Ferdinanda Annesi
- CNR-Lab. Licryl, Institute NANOTEC, 87036 Arcavacata di Rende, Italy.
| | - Alfredo Pane
- CNR-Lab. Licryl, Institute NANOTEC, 87036 Arcavacata di Rende, Italy.
| | - Maria Adele Losso
- Department DiBEST (Biology, Ecology and Earth Sciences), University of Calabria, 87036 Arcavacata di Rende, Italy.
| | - Alexa Guglielmelli
- Department of Physics, University of Calabria, Arcavacata di Rende, 87036 Cosenza, Italy.
- CNR-Lab. Licryl, Institute NANOTEC, 87036 Arcavacata di Rende, Italy.
| | - Fabrizio Lucente
- Department DiBEST (Biology, Ecology and Earth Sciences), University of Calabria, 87036 Arcavacata di Rende, Italy.
| | - Francesca Petronella
- CNR-IPCF, National Research Council of Italy, Institute for Physical and Chemical Processes-Bari Division, Via Orabona 4, I-70126 Bari, Italy.
| | - Tiziana Placido
- CNR-IPCF, National Research Council of Italy, Institute for Physical and Chemical Processes-Bari Division, Via Orabona 4, I-70126 Bari, Italy.
| | - Roberto Comparelli
- CNR-IPCF, National Research Council of Italy, Institute for Physical and Chemical Processes-Bari Division, Via Orabona 4, I-70126 Bari, Italy.
| | - Maria Grazia Guzzo
- Department DiBEST (Biology, Ecology and Earth Sciences), University of Calabria, 87036 Arcavacata di Rende, Italy.
| | - Maria Lucia Curri
- CNR-IPCF, National Research Council of Italy, Institute for Physical and Chemical Processes-Bari Division, Via Orabona 4, I-70126 Bari, Italy.
- Department of Chemistry, "A. Moro" University of Bari, Via Orabona 4, I-70126 Bari, Italy.
| | - Roberto Bartolino
- Department of Physics, University of Calabria, Arcavacata di Rende, 87036 Cosenza, Italy.
- CNR-Lab. Licryl, Institute NANOTEC, 87036 Arcavacata di Rende, Italy.
| | - Luciano De Sio
- Department of Medico-surgical Sciences and Biotechnologies, Sapienza University of Rome, Corso della Repubblica 79, 04100 Latina, Italy.
- CNR-Lab. Licryl, Institute NANOTEC, 87036 Arcavacata di Rende, Italy.
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Loeb S, Li C, Kim JH. Solar Photothermal Disinfection using Broadband-Light Absorbing Gold Nanoparticles and Carbon Black. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:205-213. [PMID: 29240431 DOI: 10.1021/acs.est.7b04442] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A simple heat treatment, perhaps the most globally recognized point-of-use water sterilization method, is seemingly effective against all major pathogens of concern, but bulk water boiling is not energy efficient or sustainable. Herein, we present the first application of solar-to-thermal converting nanomaterials for the direct inactivation of bacteria and viruses in drinking water through the application of Au nanorods, carbon black, and Au nanorod-carbon black composite materials as light absorbers. With broad absorption bands spanning the visible and near-infrared wavelengths, at sufficient concentrations, these nanoparticles induce multiple scattering events, increasing photon absorption probability and concentrating the light within a small spatial domain, leading to localized, intense heating that inactivates microorganisms in close proximity. Moving toward practical device design, we have developed a facile silane immobilization approach to fabricate films with densely packed layers of photothermal nanomaterials. Our results suggest that upon irraditaion with simulated solar light, these films can thermally inactivate bacteria and viruses, as demonstrated through the inactivation of surrogate organisms Escherichia coli K-12, and bacteriophages MS2 and PR772.
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Affiliation(s)
- Stephanie Loeb
- Department of Chemical and Environmental Engineering and Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), Yale University , 17 Hillhouse Ave, New Haven, Connecticut 06511, United States
| | - Chuanhao Li
- Department of Chemical and Environmental Engineering and Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), Yale University , 17 Hillhouse Ave, New Haven, Connecticut 06511, United States
- Department of Environmental Science and Engineering, Sun Yat-sen University , Guangzhou, Guangdong China
| | - Jae-Hong Kim
- Department of Chemical and Environmental Engineering and Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), Yale University , 17 Hillhouse Ave, New Haven, Connecticut 06511, United States
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Lu M, Kang N, Chen C, Yang L, Li Y, Hong M, Luo X, Ren L, Wang X. Plasmonic enhancement of cyanine dyes for near-infrared light-triggered photodynamic/photothermal therapy and fluorescent imaging. NANOTECHNOLOGY 2017; 28:445710. [PMID: 28741598 DOI: 10.1088/1361-6528/aa81e1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Near-infrared (NIR) triggered cyanine dyes have attracted considerable attention in multimodal tumor theranostics. However, NIR cyanine dyes used in tumor treatment often suffer from low fluorescence intensity and weak singlet oxygen generation efficiency, resulting in inadequate diagnostic and therapy efficacy for tumors. It is still a great challenge to improve both the photodynamic therapy (PDT) and fluorescent imaging (FLI) efficacy of cyanine dyes in tumor applications. Herein, a novel multifunctional nanoagent AuNRs@SiO2-IR795 was developed to realize the integrated photothermal/photodynamic therapy (PTT/PDT) and FLI at a very low dosage of IR795 (0.4 μM) based on metal-enhanced fluorescence (MEF) effects. In our design, both the fluorescence intensity and reactive oxygen species of AuNRs@SiO2-IR795 nanocomposites were significantly enhanced up to 51.7 and 6.3 folds compared with free IR795, owing to the localized surface plasmon resonance band of AuNRs overlapping with the absorption or fluorescence emission band of the IR795 dye. Under NIR laser irradiation, the cancer cell inhibition efficiency in vitro with synergetic PDT/PTT was up to 82.3%, compared with 10.3% for free IR795. Moreover, the enhanced fluorescence intensity of our designed nanocomposites was helpful to track their behavior in tumor cells. Therefore, our designed nanoagents highlight the applications of multimodal diagnostics and therapy in tumors based on MEF.
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Affiliation(s)
- Mindan Lu
- School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, People's Republic of China
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Gao B, Xu J, He KW, Shen L, Chen H, Yang HJ, Li AH, Xiao WH. Cellular Uptake and Intra-Organ Biodistribution of Functionalized Silica-Coated Gold Nanorods. Mol Imaging Biol 2017; 18:667-76. [PMID: 26884056 DOI: 10.1007/s11307-016-0938-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
PURPOSE To develop a new nanobiosystem based on folate-functionalized silica-coated gold nanorods and to investigate its cellular uptake and intra-organ biodistribution in vitro and in vivo. PROCEDURES Ellipsoidal silica-coated gold nanorods (GNRs@SIO2) were prepared by seeded growth method using silicon dioxide (SIO2) as the shell material. Rhodamine-labeled GNRs@SiO2-folic acid (FA) were obtained by reacting the amino group located on GNRs@SiO2-FA with rhodamine isothiocyanate. The characteristics of the prepared GNRs@SiO2-FA were studied using transmission electron microscopy (TEM) and UV spectra. The 3-[4, 5-dimethylthiazol-2-yl]-2,5 diphenyltetrazolium bromide (MTT) colorimetric method was used to assess the biocompatibility of GNRs@SiO2-FA, and their uptake into cells was observed using TEM. In vivo experiments of cellular uptake and study of the intra-organ biodistribution of GNRs@SiO2-FA were detected using intrinsic two-photon luminescence. RESULTS Analysis of UV spectra confirmed the successfu1 preparation of GNRs@SiO2-FA. Results of the MTT assay demonstrated that surface modification of GNRs@SiO2-FA resulted in excellent biocompatibility. TEM examination revealed that GNRs@SiO2-FA entered the cells via endocytosis, which could connect to cancer cells with high folic acid expression. We found that GNRs exhibit bright luminescence and could be visualized in vivo by direct imaging of these particles within the tissue. Additionally, GNRs@SiO2-FA could specifically bind to tumor cells. GNRs@SiO2-FA entered tumor cells within 24 h and had a heterogeneous distribution with higher accumulation at the tumor cytoplasm. CONCLUSION GNRs@SiO2-FA can bind to cells and were found to be internalized by targeted folate receptor-expressing cells via a ligand-receptor-mediated endocytosis pathway, which is very useful in diagnosing diseases as well as in treating neoplasm with I-125 particles.
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Affiliation(s)
- Bin Gao
- Department of Interventional Radiology, Third Affiliated Hospital, Anhui Medical University, Hefei, 230061, Anhui Province, China.
| | - Jun Xu
- Department of Interventional Radiology, Third Affiliated Hospital, Anhui Medical University, Hefei, 230061, Anhui Province, China
| | - Ke-Wu He
- Department of Interventional Radiology, Third Affiliated Hospital, Anhui Medical University, Hefei, 230061, Anhui Province, China
| | - Lei Shen
- Department of Interventional Radiology, Third Affiliated Hospital, Anhui Medical University, Hefei, 230061, Anhui Province, China
| | - Hao Chen
- Department of Interventional Radiology, Third Affiliated Hospital, Anhui Medical University, Hefei, 230061, Anhui Province, China
| | - Hui-Jun Yang
- Department of Interventional Radiology, Third Affiliated Hospital, Anhui Medical University, Hefei, 230061, Anhui Province, China
| | - Ai-Hua Li
- Department of Interventional Radiology, Third Affiliated Hospital, Anhui Medical University, Hefei, 230061, Anhui Province, China
| | - Wei-Hua Xiao
- School of Life Science, University of Science and Technology of China, Hefei, 230022, Anhui Province, China
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Jijie R, Dumych T, Chengnan L, Bouckaert J, Turcheniuk K, Hage CH, Heliot L, Cudennec B, Dumitrascu N, Boukherroub R, Szunerits S. Particle-based photodynamic therapy based on indocyanine green modified plasmonic nanostructures for inactivation of a Crohn's disease-associated Escherichia coli strain. J Mater Chem B 2016; 4:2598-2605. [PMID: 32263283 DOI: 10.1039/c5tb02697k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Particle-based photodynamic therapy (PPDT) holds great promise in theranostic applications. Herein, we demonstrate that PPDT based on gold nanorods coated with an indocyanine green (ICG)-loaded silica shell allows for the inactivation of the Crohn's disease-associated adherent-invasive Escherichia coli strain LF82 (E. coli LF82) under pulsed laser light irradiation at 810 nm. Fine-tuning of the plasmonic structures together with maximizing the photosensitizer loading onto the nanostructures allowed optimizing the singlet oxygen generation capability and the PPDT efficiency. Using a nanoparticle concentration low enough to suppress photothermal heating effects, 6 log10 reduction in E. coli LF82 viability could be achieved using gold nanostructures displaying a plasmonic band at 900 nm. An additional modality of nanoparticle-based photoinactivation of E. coli is partly observed, with 3 log10 reduction of bacterial viability using Au NRs@SiO2 without ICG, due to the two-photon induced formation of reactive oxygen species. Interaction of the particles with the bacterial surface, responsible for the disruption of the bacterial integrity, together with the generation of moderate quantities of singlet oxygen could account for this behavior.
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Affiliation(s)
- Roxana Jijie
- Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN), UMR CNRS8520, Université Lille1, Avenue Poincaré-BP 60069, 59652 Villeneuve d'Ascq, France.
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