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D’Avenio G, Daniele C, Grigioni M. Nanostructured Medical Devices: Regulatory Perspective and Current Applications. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1787. [PMID: 38673144 PMCID: PMC11051465 DOI: 10.3390/ma17081787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 04/05/2024] [Accepted: 04/09/2024] [Indexed: 04/28/2024]
Abstract
Nanomaterials (NMs) are having a huge impact in several domains, including the fabrication of medical devices (MDs). Hence, nanostructured MDs are becoming quite common; nevertheless, the associated risks must be carefully considered in order to demonstrate safety prior to their immission on the market. The biological effect of NMs requires the consideration of methodological issues since already established methods for, e.g., cytotoxicity can be subject to a loss of accuracy in the presence of certain NMs. The need for oversight of MDs containing NMs is reflected by the European Regulation 2017/745 on MDs, which states that MDs incorporating or consisting of NMs are in class III, at highest risk, unless the NM is encapsulated or bound in such a manner that the potential for its internal exposure is low or negligible (Rule 19). This study addresses the role of NMs in medical devices, highlighting the current applications and considering the regulatory requirements of such products.
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Affiliation(s)
- Giuseppe D’Avenio
- National Centre for Innovative Technologies in Public Health, Italian National Institute of Health (ISS), 00161 Rome, Italy; (C.D.); (M.G.)
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Mehrabi MR, Soltani M, Chiani M, Raahemifar K, Farhangi A. Nanomedicine: New Frontiers in Fighting Microbial Infections. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:483. [PMID: 36770443 PMCID: PMC9920255 DOI: 10.3390/nano13030483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 01/21/2023] [Accepted: 01/22/2023] [Indexed: 06/18/2023]
Abstract
Microbes have dominated life on Earth for the past two billion years, despite facing a variety of obstacles. In the 20th century, antibiotics and immunizations brought about these changes. Since then, microorganisms have acquired resistance, and various infectious diseases have been able to avoid being treated with traditionally developed vaccines. Antibiotic resistance and pathogenicity have surpassed antibiotic discovery in terms of importance over the course of the past few decades. These shifts have resulted in tremendous economic and health repercussions across the board for all socioeconomic levels; thus, we require ground-breaking innovations to effectively manage microbial infections and to provide long-term solutions. The pharmaceutical and biotechnology sectors have been radically altered as a result of nanomedicine, and this trend is now spreading to the antibacterial research community. Here, we examine the role that nanomedicine plays in the prevention of microbial infections, including topics such as diagnosis, antimicrobial therapy, pharmaceutical administration, and immunizations, as well as the opportunities and challenges that lie ahead.
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Affiliation(s)
- Mohammad Reza Mehrabi
- Department of NanoBiotechnology, Pasteur Institute of Iran, Tehran 13169-43551, Iran
| | - Madjid Soltani
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran 19967-15433, Iran
- Advanced Bioengineering Initiative Center, Multidisciplinary International Complex, K. N. Toosi University of Technology, Tehran 14176-14411, Iran
- Centre for Biotechnology and Bioengineering (CBB), University of Waterloo, Waterloo, ON N2L 3G1, Canada
- Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Mohsen Chiani
- Department of NanoBiotechnology, Pasteur Institute of Iran, Tehran 13169-43551, Iran
| | - Kaamran Raahemifar
- Data Science and Artificial Intelligence Program, College of Information Sciences and Technology (IST), Penn State University, State College, PA 16801, USA
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
- School of Optometry and Vision Science, Faculty of Science, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
| | - Ali Farhangi
- Department of NanoBiotechnology, Pasteur Institute of Iran, Tehran 13169-43551, Iran
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Asare EO, Mun EA, Marsili E, Paunov VN. Nanotechnologies for control of pathogenic microbial biofilms. J Mater Chem B 2022; 10:5129-5153. [PMID: 35735175 DOI: 10.1039/d2tb00233g] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Biofilms are formed at interfaces by microorganisms, which congregate in microstructured communities embedded in a self-produced extracellular polymeric substance (EPS). Biofilm-related infections are problematic due to the high resistance towards most clinically used antimicrobials, which is associated with high mortality and morbidity, combined with increased hospital stays and overall treatment costs. Several new nanotechnology-based approaches have recently been proposed for targeting resistant bacteria and microbial biofilms. Here we discuss the impacts of biofilms on healthcare, food processing and packaging, and water filtration and distribution systems, and summarize the emerging nanotechnological strategies that are being developed for biofilm prevention, control and eradication. Combination of novel nanomaterials with conventional antimicrobial therapies has shown great potential in producing more effective platforms for controlling biofilms. Recent developments include antimicrobial nanocarriers with enzyme surface functionality that allow passive infection site targeting, degradation of the EPS and delivery of high concentrations of antimicrobials to the residing cells. Several stimuli-responsive antimicrobial formulation strategies have taken advantage of the biofilm microenvironment to enhance interaction and passive delivery into the biofilm sites. Nanoparticles of ultralow size have also been recently employed in formulations to improve the EPS penetration, enhance the carrier efficiency, and improve the cell wall permeability to antimicrobials. We also discuss antimicrobial metal and metal oxide nanoparticle formulations which provide additional mechanical factors through externally induced actuation and generate reactive oxygen species (ROS) within the biofilms. The review helps to bridge microbiology with materials science and nanotechnology, enabling a more comprehensive interdisciplinary approach towards the development of novel antimicrobial treatments and biofilm control strategies.
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Affiliation(s)
- Evans O Asare
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Nursultan city, 010000, Kazakhstan.
| | - Ellina A Mun
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Nursultan city, 010000, Kazakhstan.
| | - Enrico Marsili
- Department of Chemical Engineering, School of Engineering and Digital Sciences, Nazarbayev University, 53 Kabanbay Batyr Avenue, Nursultan city, 010000, Kazakhstan
| | - Vesselin N Paunov
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Nursultan city, 010000, Kazakhstan.
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ABSTRACTS (BY NUMBER). Tissue Eng Part A 2022. [DOI: 10.1089/ten.tea.2022.29025.abstracts] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Tran HA, Tran PA. In Situ Coatings of Silver Nanoparticles for Biofilm Treatment in Implant-Retention Surgeries: Antimicrobial Activities in Monoculture and Coculture. ACS APPLIED MATERIALS & INTERFACES 2021; 13:41435-41444. [PMID: 34448395 DOI: 10.1021/acsami.1c08239] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Bacterial biofilms are indicated in most medical device-associated infections. Treating these biofilms is challenging yet critically important for applications such as in device-retention surgeries, which can have reinfection rates of up to 80%. This in vitro study centered around our new method of treating biofilm and preventing reinfection. Ionic silver (Ag, in the form of silver nitrate) combined with dopamine and a biofilm-lysing enzyme (α-amylase) were applied to model 4-day-old Staphylococcus aureus biofilms on titanium substrates to degrade the extracellular matrix of the biofilm and kill the biofilm bacteria. In this process, the oxidative self-polymerization of dopamine converted Ag ions into Ag nanoparticles that, together with the resultant self-adhering polydopamine (PDA), formed coatings that strongly bound to the treated substrates. Surprisingly, although these Ag/PDA coatings significantly reduced S. aureus growth in standard bacterial monoculture, they showed much lower antimicrobial activity in coculture of the bacteria and osteoblastic MC3T3-E1 cells in which the bacteria were also found attached to the osteoblasts. This S. aureus- osteoblast interaction was also linked to bacterial survival against gentamicin treatment observed in coculture. Our study thus provided clear evidence suggesting that bacteria's interactions with tissue cells surrounding implants may significantly contribute to their resistance to antimicrobial treatment.
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Affiliation(s)
- Hien A Tran
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), 2 George Street, Brisbane, Queensland 4000, Australia
- Interface Science and Materials Engineering Group, School of Mechanical, Medical and Process Engineering, QUT, 2 George Street, Brisbane, Queensland 4000, Australia
| | - Phong A Tran
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), 2 George Street, Brisbane, Queensland 4000, Australia
- Interface Science and Materials Engineering Group, School of Mechanical, Medical and Process Engineering, QUT, 2 George Street, Brisbane, Queensland 4000, Australia
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Aljaafari H, Gu Y, Chicchelly H, Nuxoll E. Thermal Shock and Ciprofloxacin Act Orthogonally on Pseudomonas aeruginosa Biofilms. Antibiotics (Basel) 2021; 10:1017. [PMID: 34439066 PMCID: PMC8388990 DOI: 10.3390/antibiotics10081017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 08/12/2021] [Accepted: 08/16/2021] [Indexed: 01/01/2023] Open
Abstract
Bacterial biofilm infections are a major liability of medical implants, due to their resistance to both antibiotics and host immune response. Thermal shock can kill established biofilms, and some evidence suggests antibiotics may enhance this efficacy, despite having an insufficient effect themselves. The nature of this interaction is unclear, however, complicating efforts to integrate thermal shock into implant infection treatment. This study aimed to determine whether these treatments were truly synergistic or simply orthogonal (i.e., independent). Pseudomonas aeruginosa biofilms of different architectures and stationary-phase population density were subjected to various thermal shocks, antibiotic exposures, or combinations thereof, and examined either immediately after treatment or after subsequent reincubation. Population decreases from the combination treatment matched the product of the decreases of individual treatments, indicating their orthogonality. However, reincubation showed binary behavior, where biofilms with an immediate population decrease beyond a critical factor (~104) died off completely during reincubation, while biofilms with a smaller immediate decrease regrew. This critical factor was independent of the initial population density and the combination of treatments that achieved the immediate decrease. While antibiotics do not appear to enhance thermal shock directly, their contribution to achieving a critical population decrease for biofilm elimination can make the treatments appear strongly synergistic, strongly decreasing the intensity of thermal shock needed.
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Affiliation(s)
- Haydar Aljaafari
- Department of Chemical and Biochemical Engineering, 4133 Seamans Center for the Engineering Arts and Sciences, University of Iowa, Iowa City, IA 52242, USA; (H.A.); (Y.G.); (H.C.)
- Department of Chemical Engineering, University of Technology, Baghdad 10066, Iraq
| | - Yuejia Gu
- Department of Chemical and Biochemical Engineering, 4133 Seamans Center for the Engineering Arts and Sciences, University of Iowa, Iowa City, IA 52242, USA; (H.A.); (Y.G.); (H.C.)
| | - Hannah Chicchelly
- Department of Chemical and Biochemical Engineering, 4133 Seamans Center for the Engineering Arts and Sciences, University of Iowa, Iowa City, IA 52242, USA; (H.A.); (Y.G.); (H.C.)
| | - Eric Nuxoll
- Department of Chemical and Biochemical Engineering, 4133 Seamans Center for the Engineering Arts and Sciences, University of Iowa, Iowa City, IA 52242, USA; (H.A.); (Y.G.); (H.C.)
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Tran HM, Tran H, Booth MA, Fox KE, Nguyen TH, Tran N, Tran PA. Nanomaterials for Treating Bacterial Biofilms on Implantable Medical Devices. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2253. [PMID: 33203046 PMCID: PMC7696307 DOI: 10.3390/nano10112253] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 10/31/2020] [Accepted: 11/11/2020] [Indexed: 12/12/2022]
Abstract
Bacterial biofilms are involved in most device-associated infections and remain a challenge for modern medicine. One major approach to addressing this problem is to prevent the formation of biofilms using novel antimicrobial materials, device surface modification or local drug delivery; however, successful preventive measures are still extremely limited. The other approach is concerned with treating biofilms that have already formed on the devices; this approach is the focus of our manuscript. Treating biofilms associated with medical devices has unique challenges due to the biofilm's extracellular polymer substance (EPS) and the biofilm bacteria's resistance to most conventional antimicrobial agents. The treatment is further complicated by the fact that the treatment must be suitable for applying on devices surrounded by host tissue in many cases. Nanomaterials have been extensively investigated for preventing biofilm formation on medical devices, yet their applications in treating bacterial biofilm remains to be further investigated due to the fact that treating the biofilm bacteria and destroying the EPS are much more challenging than preventing adhesion of planktonic bacteria or inhibiting their surface colonization. In this highly focused review, we examined only studies that demonstrated successful EPS destruction and biofilm bacteria killing and provided in-depth description of the nanomaterials and the biofilm eradication efficacy, followed by discussion of key issues in this topic and suggestion for future development.
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Affiliation(s)
- Hoai My Tran
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia; (H.M.T.); (H.T.)
- Interface Science and Materials Engineering Group, School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Hien Tran
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia; (H.M.T.); (H.T.)
- Interface Science and Materials Engineering Group, School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Marsilea A. Booth
- School of Engineering, RMIT University, Melbourne, VIC 3001, Australia; (M.A.B.); (K.E.F.)
| | - Kate E. Fox
- School of Engineering, RMIT University, Melbourne, VIC 3001, Australia; (M.A.B.); (K.E.F.)
- Center for Additive Manufacturing, RMIT University, PO Box 2476, Melbourne, VIC 3001, Australia
| | - Thi Hiep Nguyen
- School of Biomedical Engineering, International University, Vietnam National University, Ho Chi Minh City 71300, Vietnam;
| | - Nhiem Tran
- School of Science, RMIT University, Melbourne, VIC 3001, Australia;
| | - Phong A. Tran
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia; (H.M.T.); (H.T.)
- Interface Science and Materials Engineering Group, School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
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9
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Le TC, Zhai J, Chiu WH, Tran PA, Tran N. Janus particles: recent advances in the biomedical applications. Int J Nanomedicine 2019; 14:6749-6777. [PMID: 31692550 PMCID: PMC6711559 DOI: 10.2147/ijn.s169030] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 05/21/2019] [Indexed: 12/13/2022] Open
Abstract
Janus particles, which are named after the two-faced Roman god Janus, have two distinct sides with different surface features, structures, and compositions. This asymmetric structure enables the combination of different or even incompatible physical, chemical, and mechanical properties within a single particle. Much effort has been focused on the preparation of Janus particles with high homogeneity, tunable size and shape, combined functionalities, and scalability. With their unique features, Janus particles have attracted attention in a wide range of applications such as in optics, catalysis, and biomedicine. As a biomedical device, Janus particles offer opportunities to incorporate therapeutics, imaging, or sensing modalities in independent compartments of a single particle in a spatially controlled manner. This may result in synergistic actions of combined therapies and multi-level targeting not possible in isotropic systems. In this review, we summarize the latest advances in employing Janus particles as therapeutic delivery carriers, in vivo imaging probes, and biosensors. Challenges and future opportunities for these particles will also be discussed.
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Affiliation(s)
- Tu C Le
- School of Engineering, RMIT University, Melbourne, VIC 3001,Australia
| | - Jiali Zhai
- School of Science, RMIT University, Melbourne, VIC 3001,Australia
| | - Wei-Hsun Chiu
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Phong A Tran
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD 4000, Australia
- Interface Science and Materials Engineering group, School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Nhiem Tran
- School of Science, RMIT University, Melbourne, VIC 3001,Australia
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Tran PA, O'Brien-Simpson N, Palmer JA, Bock N, Reynolds EC, Webster TJ, Deva A, Morrison WA, O'Connor AJ. Selenium nanoparticles as anti-infective implant coatings for trauma orthopedics against methicillin-resistant Staphylococcus aureus and epidermidis: in vitro and in vivo assessment. Int J Nanomedicine 2019; 14:4613-4624. [PMID: 31308651 PMCID: PMC6616172 DOI: 10.2147/ijn.s197737] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 04/16/2019] [Indexed: 11/24/2022] Open
Abstract
Background: Bacterial infection is a common and serious complication in orthopedic implants following traumatic injury, which is often associated with extensive soft tissue damage and contaminated wounds. Multidrug-resistant bacteria have been found in these infected wounds, especially in patients who have multi trauma and prolonged stay in intensive care units.Purpose: The objective of this study was to develop a coating on orthopedic implants that is effective against drug-resistant bacteria. Methods and results: We applied nanoparticles (30-70nm) of the trace element selenium (Se) as a coating through surface-induced nucleation-deposition on titanium implants and investigated the antimicrobial activity against drug resistant bacteria including Methicillin-resistant Staphylococcus aureus (MRSA) and Methicillin-resistant Staphylococcus epidermidis (MRSE) in vitro and in an infected femur model in rats.The nanoparticles were shown in vitro to have antimicrobial activity at concentrations as low as 0.5ppm. The nanoparticle coatings strongly inhibited biofilm formation on the implants and reduced the number of viable bacteria in the surrounding tissue following inoculation of implants with biofilm forming doses of bacteria. Conclusion: This study shows a proof of concept for a selenium nanoparticle coatings as a potential anti-infective barrier for orthopedic medical devices in the setting of contamination with multi-resistant bacteria. It also represents one of the few (if only) in vivo assessment of selenium nanoparticle coatings on reducing antibiotic-resistant orthopedic implant infections.
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Affiliation(s)
- Phong A Tran
- School of Chemistry, Physics and Mechanical Engeneering, Faculty of Science and Engeneering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia.,Interface Science and Materials Engineering Group, School of Chemistry, Physics & Mechanical Engineering, QUT, Brisbane, Queensland 4000, Australia.,Departments of Chemical and Biomedical Engineering, The Particulate Fluid Processing Centre, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Neil O'Brien-Simpson
- Oral Health Cooperative Research Centre, Melbourne Dental School, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Jason A Palmer
- O' Brien Institute, St. Vincent's Institute of Medical Research, Fitzroy, Victoria 3065, Australia
| | - Nathalie Bock
- School of Chemistry, Physics and Mechanical Engeneering, Faculty of Science and Engeneering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia.,School of Biomedical Sciences, Faculty of Health, Institute of Health and Biomedical Innovation, Translational Research Institute, QUT, Brisbane, QLD, Australia
| | - Eric C Reynolds
- Oral Health Cooperative Research Centre, Melbourne Dental School, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Thomas J Webster
- Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA
| | - Anand Deva
- Surgical Infection Research Group, Australian School of Advanced Medicine, Macquarie University, Sydney, NSW, Australia
| | - Wayne A Morrison
- O' Brien Institute, St. Vincent's Institute of Medical Research, Fitzroy, Victoria 3065, Australia
| | - Andrea J O'Connor
- Departments of Chemical and Biomedical Engineering, The Particulate Fluid Processing Centre, The University of Melbourne, Melbourne, Victoria 3010, Australia
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Karahan HE, Wiraja C, Xu C, Wei J, Wang Y, Wang L, Liu F, Chen Y. Graphene Materials in Antimicrobial Nanomedicine: Current Status and Future Perspectives. Adv Healthc Mater 2018; 7:e1701406. [PMID: 29504283 DOI: 10.1002/adhm.201701406] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 01/16/2018] [Indexed: 02/06/2023]
Abstract
Graphene materials (GMs), such as graphene, graphene oxide (GO), reduced GO (rGO), and graphene quantum dots (GQDs), are rapidly emerging as a new class of broad-spectrum antimicrobial agents. This report describes their state-of-the-art and potential future covering both fundamental aspects and biomedical applications. First, the current understanding of the antimicrobial mechanisms of GMs is illustrated, and the complex picture of underlying structure-property-activity relationships is sketched. Next, the different modes of utilization of antimicrobial GMs are explained, which include their use as colloidal dispersions, surface coatings, and photothermal/photodynamic therapy agents. Due to their practical relevance, the examples where GMs function as synergistic agents or release platforms for metal ions and/or antibiotic drugs are also discussed. Later, the applicability of GMs in the design of wound dressings, infection-protective coatings, and antibiotic-like formulations ("nanoantibiotics") is assessed. Notably, to support our assessments, the existing clinical applications of conventional carbon materials are also evaluated. Finally, the key hurdles of the field are highlighted, and several possible directions for future investigations are proposed. We hope that the roadmap provided here will encourage researchers to tackle remaining challenges toward clinical translation of promising research findings and help realize the potential of GMs in antimicrobial nanomedicine.
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Affiliation(s)
- Hüseyin Enis Karahan
- School of Chemical and Biomolecular Engineering The University of Sydney NSW 2006 Australia
- School of Chemical and Biomedical Engineering Nanyang Technological University Singapore 637459 Singapore
- Singapore Institute of Manufacturing Technology Singapore 638075 Singapore
| | - Christian Wiraja
- School of Chemical and Biomedical Engineering Nanyang Technological University Singapore 637459 Singapore
| | - Chenjie Xu
- School of Chemical and Biomedical Engineering Nanyang Technological University Singapore 637459 Singapore
- NTU‐Northwestern Institute of Nanomedicine Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
| | - Jun Wei
- Singapore Institute of Manufacturing Technology Singapore 638075 Singapore
| | - Yilei Wang
- School of Chemistry & Chemical Engineering Tianjin University of Technology 391 Binshui, Xidao, Xiqing District Tianjin 300384 China
| | - Liang Wang
- School of Chemistry & Chemical Engineering Tianjin University of Technology 391 Binshui, Xidao, Xiqing District Tianjin 300384 China
| | - Fei Liu
- State Key Laboratory of Applied Microbiology Southern China Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application Guangdong Institute of Microbiology 100 Central Xianlie Road Guangzhou 510070 China
| | - Yuan Chen
- School of Chemical and Biomolecular Engineering The University of Sydney NSW 2006 Australia
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Sowmya C, Lavakumar V, Venkateshan N, Ravichandiran V, Saigopal DVR. Exploration of Phyllanthus acidus mediated silver nanoparticles and its activity against infectious bacterial pathogen. Chem Cent J 2018; 12:42. [PMID: 29679285 PMCID: PMC5910440 DOI: 10.1186/s13065-018-0412-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 04/13/2018] [Indexed: 11/10/2022] Open
Abstract
In our present investigation, synthesis of nontoxic, eco friendly and cost effective silver nanoparticles, Phyllanthus acidus (P. acidus) was used as starting material. The influence of phyto-constituents present in aqueous extracts of Phyllanthus acidus was found to be effective in reduction of silver nitrate to free silver nanoparticles (PA-AgNPs). HPTLC finger print analysis reveals the presence of flavonoid, quercetin in aqueous extracts of Phyllanthus acidus. Surface plasmon racemonance exhibited λ max at 462 nm through UV-Vis spectroscopy. Zeta size revealed that the size of nanoparticles were with in the range of 65-250 nm with polydisperse index (PDI) of 0.451. The negative charge of zeta potential value (- 16.4) indicates repulsion among PA-AgNPs with their excellent stability. FESEM-EDAX, XRD and TEM analysis confirmed the presence of nano-crystalline PA-AgNPs with different morphological textures. Further, PA-AgNPs has shown potent antibacterial effect on E. coli cells. The greater antibacterial effect (viable and dead cells) of PA-AgNPs were confirmed by using acridine orange (AO) dye which can able to provide insight of healthy as well as damaged DNA. Live cells emit florescence green and dead cells (treated with PA-AgNPS at 20 and 40 µg/ml) appear as pale orange red colour. Post treatment, investigations of PA-AgNPs on E. coli cells under SEM was found to be effective against cell membrane damages which leads to cell death or cell growth arrest. Hence, from the above findings, we strongly recommend silver nanoparticles from Phyllanthus acidus can be used as a potential source for antimicrobial agent for chronic infections and also against other harmful microorganisms.
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Affiliation(s)
- Cherukuri Sowmya
- Drug Delivery and Nanotechnology Laboratory (DDNL), Department of Pharmaceutics, Arulmigu Kalasalingam College of Pharmacy, Anand Nagar, Krishnankoil, Virudhunagar Dist, Srivilliputtur, 626126, Tamil Nadu, India
| | - Vuppalapati Lavakumar
- Drug Delivery and Nanotechnology Laboratory (DDNL), Department of Pharmaceutics, Arulmigu Kalasalingam College of Pharmacy, Anand Nagar, Krishnankoil, Virudhunagar Dist, Srivilliputtur, 626126, Tamil Nadu, India.
| | - Narayanan Venkateshan
- Drug Delivery and Nanotechnology Laboratory (DDNL), Department of Pharmaceutics, Arulmigu Kalasalingam College of Pharmacy, Anand Nagar, Krishnankoil, Virudhunagar Dist, Srivilliputtur, 626126, Tamil Nadu, India
| | - Velayutham Ravichandiran
- National Institute of Pharamceutical Education and Research, NIPER - Kolkata at Indian Institute of Chemical Biology, Raja S. C. Mullick Road, Jadavpur, 700032, Kolkata, India
| | - D V R Saigopal
- Department of Virology, Sri Venkateswara University, Tirupati, 517570, Andhra Pradesh, India
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Ricker EB, Al-Jaafari H, Bader TM, Hundley BS, Nuxoll E. Thermal shock susceptibility and regrowth of Pseudomonas aeruginosa biofilms. Int J Hyperthermia 2018; 34:168-176. [PMID: 29498312 PMCID: PMC6150600 DOI: 10.1080/02656736.2017.1347964] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Biofilms on implanted medical devices cause thousands of patients each year to undergo multiple surgeries to remove and replace the implant, driving billions of dollars in increased health care costs due to the lack of viable treatment options for in situ biofilm eradication. Remotely activated localised heating is under investigation to mitigate these biofilms; however, little is known about the temperatures required to kill the biofilms. To better understand the required parameters this study investigated the thermal susceptibility of biofilms as a function of their fluidic and chemical environment during growth, as well as their propensity for regrowth following thermal shock. Pseudomonas aeruginosa biofilms were cultured in shaker plate fluidic conditions in four different growth media, then thermally shocked at various temperatures and exposure times. Biofilms were re-incubated to determine their regrowth potential following thermal shocks of various intensities. Results indicate that growth media has little impact on thermal susceptibility, while fluidic conditions strongly influence susceptibility to modest thermal shocks. This effect disappears, however, with increasingly aggressive shocks, reducing biofilm populations by up to 5 orders of magnitude. Regrowth studies indicate a critical post-shock bacterial loading (∼103 CFU/cm2) below which the biofilms were no longer viable, while biofilms above that loading slowly regrew to their previous population density.
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Affiliation(s)
- Erica B. Ricker
- Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, IA, USA
| | - Haydar Al-Jaafari
- Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, IA, USA
- Department of Chemical Engineering, University of Technology, Baghdad, Iraq
| | - Trigg M. Bader
- Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, IA, USA
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, Colorado, USA
| | - Bryce S. Hundley
- Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, IA, USA
| | - Eric Nuxoll
- Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, IA, USA
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Tran N, Hocquet M, Eon B, Sangwan P, Ratcliffe J, Hinton TM, White J, Ozcelik B, Reynolds NP, Muir BW. Non-lamellar lyotropic liquid crystalline nanoparticles enhance the antibacterial effects of rifampicin against Staphylococcus aureus. J Colloid Interface Sci 2018; 519:107-118. [PMID: 29486430 DOI: 10.1016/j.jcis.2018.02.048] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 02/15/2018] [Accepted: 02/15/2018] [Indexed: 01/01/2023]
Abstract
The fight against infection in an era of emerging antibiotic resistant bacteria is one of the grandest scientific challenges facing society today. Nano-carriers show great promise in improving the antibacterial activity of antibiotics as they are able to enhance their solubility, provide sustained release and reduce toxic side effects via specifically targeting infection sites. Here, we investigate the antibacterial effect of two lipidic nano-carriers that contain the poorly soluble antibiotic rifampicin in their bilayers. One nanoparticle is assembled solely from the lipid monoolein, thus is neutral at physiological pH and the other contains a mixture of monoolein and the cationic lipid N-[1-(2,3-Dioleoyloxy)propyl]-N,N,N-trimethylammonium methyl-sulfate (DOTAP), thus is positively charged. Our results show that rifampicin-loaded nanoparticles reduce the minimum inhibitory concentration against Staphylococcus aureus compared to rifampicin alone, however this reduction was most pronounced for the positively charged nanoparticles. Fluorescent microscopy revealed binding of all nanoparticles to the bacteria and enhanced binding was observed for the charged nanoparticles. This suggests that the cationic lipids promote electrostatic interactions with the negatively charged bacterial membrane. Förster resonance energy transfer demonstrated that the cationic charged nanoparticles were able to fuse with bacterial membranes whilst atomic force microscopy and transmission electron microscopy revealed structural damage to the bacterial membranes caused by the nanoparticles. Significantly, we identified a concentration window in which the nanoparticles exhibited antibacterial activity while not affecting HeLa and CHO cell viability. This ability to improve the efficacy of antibiotics without affecting their eukaryotic cytotoxicity is of significant importance for future development of nanomedicine based strategies to combat infections.
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Affiliation(s)
- Nhiem Tran
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia.
| | - Marion Hocquet
- CSIRO Manufacturing, Clayton, Victoria 3168, Australia; Chimie Paris Tech, Paris, France
| | - Blandine Eon
- CSIRO Manufacturing, Clayton, Victoria 3168, Australia; Chimie Paris Tech, Paris, France
| | | | | | | | - Jacinta White
- CSIRO Manufacturing, Clayton, Victoria 3168, Australia
| | | | - Nicholas P Reynolds
- Swinburne University of Technology, ARC Training Centre for Biodevices, Faculty of Science, Engineering and Technology, Victoria 3122, Australia
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15
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3D printed Polycaprolactone scaffolds with dual macro-microporosity for applications in local delivery of antibiotics. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 87:78-89. [PMID: 29549952 DOI: 10.1016/j.msec.2018.02.008] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 01/28/2018] [Accepted: 02/13/2018] [Indexed: 12/12/2022]
Abstract
Advanced scaffolds used in tissue regenerating applications should be designed to address clinically relevant complications such as surgical site infection associated with surgical procedures. Recognizing that patient-specific scaffolds with local drug delivery capabilities are a promising approach, we combined 3D printing with traditional salt-leaching techniques to prepare a new type of scaffold with purposely designed macro- and micro-porosity. The dual macro/micro porous scaffolds of medical-grade polycaprolactone (mPCL) were characterized for their porosity, surface area, mechanical properties and degradation. The use of these scaffolds for local prophylactic release of Cefazolin to inhibit S. aureus growth was investigated as an example of drug delivery with this versatile platform. The introduction of microporosity and increased surface area allowed for loading of the scaffold using a simple drop-loading method of this heat-labile antibiotic and resulted in significant improvement in its release for up to 3 days. The Cefazolin released from scaffolds retained its bioactivity similar to that of fresh Cefazolin. There were no cytotoxic effects in vitro against 3 T3 fibroblasts at Cefazolin concentration of up to 100 μg/ml and no apparent effects on blood clot formation on the scaffolds in vitro. This study therefore presents a novel type of scaffolds with dual macro- and micro-porosity manufactured by a versatile method of 3D printing combined with salt-leaching. These scaffolds could be useful in tissue regeneration applications where it is desirable to prevent complications using local delivery of drugs.
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16
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Kim DY, Kadam A, Shinde S, Saratale RG, Patra J, Ghodake G. Recent developments in nanotechnology transforming the agricultural sector: a transition replete with opportunities. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:849-864. [PMID: 29065236 DOI: 10.1002/jsfa.8749] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/12/2017] [Accepted: 10/16/2017] [Indexed: 05/23/2023]
Abstract
The applications and benefits of nanotechnology in the agricultural sector have attracted considerable attention, particularly in the invention of unique nanopesticides and nanofertilisers. The contemporary developments in nanotechnology are acknowledged and the most significant opportunities awaiting the agriculture sector from the recent scientific and technical literature are addressed. This review discusses the significance of recent trends in nanomaterial-based sensors available for the sustainable management of agricultural soil, as well as the role of nanotechnology in detection and protection against plant pathogens, and for food quality and safety. Novel nanosensors have been reported for primary applications in improving crop practices, food quality, and packaging methods, thus will change the agricultural sector for potentially better and healthier food products. Nanotechnology is well-known to play a significant role in the effective management of phytopathogens, nutrient utilisation, controlled release of pesticides, and fertilisers. Research and scientific gaps to be overcome and fundamental questions have been addressed to fuel active development and application of nanotechnology. Together, nanoscience, nanoengineering, and nanotechnology offer a plethora of opportunities, proving a viable alternative in the agriculture and food processing sector, by providing a novel and advanced solutions. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Dae-Young Kim
- Department of Biological and Environmental Science, College of Life Science and Biotechnology, Dongguk University-Seoul, Gyeonggi-do, Republic of Korea
| | - Avinash Kadam
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul, Gyeonggi-do, Republic of Korea
| | - Surendra Shinde
- Department of Biological and Environmental Science, College of Life Science and Biotechnology, Dongguk University-Seoul, Gyeonggi-do, Republic of Korea
| | - Rijuta Ganesh Saratale
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul, Gyeonggi-do, Republic of Korea
| | - Jayanta Patra
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul, Gyeonggi-do, Republic of Korea
| | - Gajanan Ghodake
- Department of Biological and Environmental Science, College of Life Science and Biotechnology, Dongguk University-Seoul, Gyeonggi-do, Republic of Korea
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17
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Natan M, Banin E. From Nano to Micro: using nanotechnology to combat microorganisms and their multidrug resistance. FEMS Microbiol Rev 2018; 41:302-322. [PMID: 28419240 DOI: 10.1093/femsre/fux003] [Citation(s) in RCA: 132] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Accepted: 01/17/2017] [Indexed: 12/12/2022] Open
Abstract
The spread of antibiotic resistance and increasing prevalence of biofilm-associated infections is driving demand for new means to treat bacterial infection. Nanotechnology provides an innovative platform for addressing this challenge, with potential to manage even infections involving multidrug-resistant (MDR) bacteria. The current review summarizes recent progress over the last 2 years in the field of antibacterial nanodrugs, and describes their unique properties, mode of action and activity against MDR bacteria and biofilms. Biocompatibility and commercialization are also discussed. As opposed to the more common division of nanoparticles (NPs) into organic- and inorganic-based materials, this review classifies NPs into two functional categories. The first includes NPs exhibiting intrinsic antibacterial properties and the second is devoted to NPs serving as a cargo for delivering antibacterial agents. Antibacterial nanomaterials used to decorate medical devices and implants are reviewed here as well.
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Affiliation(s)
- Michal Natan
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel.,The Institute for Advanced Materials and Nanotechnology, Bar-Ilan University, Ramat-Gan 52900, Israel
| | - Ehud Banin
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel.,The Institute for Advanced Materials and Nanotechnology, Bar-Ilan University, Ramat-Gan 52900, Israel
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18
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Ricker EB, Nuxoll E. Synergistic effects of heat and antibiotics on Pseudomonas aeruginosa biofilms. BIOFOULING 2017; 33:855-866. [PMID: 29039211 PMCID: PMC6234973 DOI: 10.1080/08927014.2017.1381688] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 09/13/2017] [Indexed: 06/07/2023]
Abstract
Upon formation of a biofilm, bacteria undergo several changes that prevent eradication with antimicrobials alone. Due to this resistance, the standard of care for infected medical implants is explantation of the infected implant and surrounding tissue, followed by eventual reimplantation of a replacement device. Recent studies have demonstrated the efficacy of heat shock for biofilm eradication. To minimize the heat required for in situ biofilm eradication, this study investigated the hypothesis that antibiotics, while ineffective by themselves, may substantially increase heat shock efficacy. The combined effect of heat and antibiotics on Pseudomonas aeruginosa biofilms was quantified via heat shock in combination with ciprofloxacin, tobramycin, or erythromycin at multiple concentrations. Combined treatments had synergistic effects for all antibiotics for heat shock conditions of 60°C for 5 min to 70°C for 1 min, indicating an alternative to surgical explantation.
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Affiliation(s)
- Erica B Ricker
- a Department of Chemical and Biochemical Engineering , University of Iowa , Iowa City , IA , USA
| | - Eric Nuxoll
- a Department of Chemical and Biochemical Engineering , University of Iowa , Iowa City , IA , USA
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19
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Nanocapsules with glycerol monolaurate: Effects on Candida albicans biofilms. Microb Pathog 2016; 97:119-24. [DOI: 10.1016/j.micpath.2016.05.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 05/21/2016] [Accepted: 05/21/2016] [Indexed: 11/20/2022]
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20
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Ribeiro SM, Felício MR, Boas EV, Gonçalves S, Costa FF, Samy RP, Santos NC, Franco OL. New frontiers for anti-biofilm drug development. Pharmacol Ther 2016; 160:133-44. [DOI: 10.1016/j.pharmthera.2016.02.006] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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21
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Karahan HE, Wei L, Goh K, Wiraja C, Liu Z, Xu C, Jiang R, Wei J, Chen Y. Synergism of Water Shock and a Biocompatible Block Copolymer Potentiates the Antibacterial Activity of Graphene Oxide. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:951-62. [PMID: 26707949 DOI: 10.1002/smll.201502496] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 11/08/2015] [Indexed: 05/14/2023]
Abstract
Graphene oxide (GO) is promising in the fight against pathogenic bacteria. However, the antibacterial activity of pristine GO is relatively low and concern over human cytotoxicity further limits its potential. This study demonstrates a general approach to address both issues. The developed approach synergistically combines the water shock treatment (i.e., a sudden decrease in environmental salinity) and the use of a biocompatible block copolymer (Pluronic F-127) as a synergist co-agent. Hypoosmotic stress induced by water shock makes gram-negative pathogens more susceptible to GO. Pluronic forms highly stable nanoassemblies with GO (Pluronic-GO) that can populate around bacterial envelopes favoring the interactions between GO and bacteria. The antibacterial activity of GO at a low concentration (50 μg mL(-1) ) increases from <30% to virtually complete killing (>99%) when complemented with water shock and Pluronic (5 mg mL(-1) ) at ≈2-2.5 h of exposure. Results suggest that the enhanced dispersion of GO and the osmotic pressure generated on bacterial envelopes by polymers together potentiate GO. Pluronic also significantly suppresses the toxicity of GO toward human fibroblast cells. Fundamentally, the results highlight the crucial role of physicochemical milieu in the antibacterial activity of GO. The demonstrated strategy has potentials for daily-life bacterial disinfection applications, as hypotonic Pluronic-GO mixture is both safe and effective.
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Affiliation(s)
- H Enis Karahan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
- Singapore Institute of Manufacturing Technology (SIMTech), Singapore, 638075, Singapore
| | - Li Wei
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
| | - Kunli Goh
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
| | - Christian Wiraja
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
| | - Zhe Liu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
| | - Chenjie Xu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
- NTU-Northwestern Institute of Nanomedicine, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Rongrong Jiang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
| | - Jun Wei
- Singapore Institute of Manufacturing Technology (SIMTech), Singapore, 638075, Singapore
| | - Yuan Chen
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, 2006, Australia
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22
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Zhong J, Yan J. Seeing is believing: atomic force microscopy imaging for nanomaterial research. RSC Adv 2016. [DOI: 10.1039/c5ra22186b] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Atomic force microscopy can image nanomaterial properties such as the topography, elasticity, adhesion, friction, electrical properties, and magnetism.
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Affiliation(s)
- Jian Zhong
- College of Food Science & Technology
- Shanghai Ocean University
- Shanghai 201306
- People's Republic of China
| | - Juan Yan
- College of Food Science & Technology
- Shanghai Ocean University
- Shanghai 201306
- People's Republic of China
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23
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Antibacterial Activity of Alanine-Derived Gemini Quaternary Ammonium Compounds. J SURFACTANTS DETERG 2015; 19:275-282. [PMID: 26949329 PMCID: PMC4764639 DOI: 10.1007/s11743-015-1778-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 12/08/2015] [Indexed: 01/21/2023]
Abstract
The antibacterial activity of alanine-derived gemini quaternary ammonium salts (chlorides and bromides) with various spacer and alkyl chain lengths was investigated. The studied compounds exhibited a strong bactericidal effect, especially bromides with 10 and 12 carbon alkyl chains and 3 carbon spacer groups (TMPAL-10 Br and TMPAL-12 Br), with a short contact time. Both salts dislodged biofilms of Pseudomonas aeruginosa and Staphylococcus epidermidis, and were lethal to adherent cells of S. epidermidis. Bromide with 2 carbon spacer groups and 12 carbon alkyl chains (TMEAL-12 Br) effectively reduced microbial adhesion by coating polystyrene and silicone surfaces. The results obtained suggest that, after further studies, gemini QAS might be considered as antimicrobial agents in medicine or industry.
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24
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Chen S, He N, Yu J, Li L, Sun F, Hu Y, Deng R, Zhong S, Shen L. Inhibitory effect of 2‑mercaptoethane sulfonate on the formation of Escherichia coli biofilms in vitro. Mol Med Rep 2015; 12:5223-30. [PMID: 26238522 DOI: 10.3892/mmr.2015.4112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Accepted: 06/25/2015] [Indexed: 11/06/2022] Open
Abstract
The biofilms (BF) formed by Escherichia coli (E. coli) is an important cause of chronic and recurrent infections due to its capacity to persist on medical surfaces and indwelling devices, demonstrating the importance of inhibiting the formation of E. coli BF and reducing BF infection. Although 2‑mercaptoethane sulfonate (MESNA) exhibits a marked mucolytic effect clinically, the effect of MESNA on the inhibition of E. coli BF formation remains to be elucidated. The present study investigated whether MESNA inhibits the formation of E. coli BF in vitro. The minimum inhibitory concentration of MESNA on E. coli was determined to be 10 mg/ml. Subsequently, the effect of MESNA on BF early adhesion, extracellular polysaccharide (EPS) and extracellular protein were detected. The effect of a subinhibitory concentration of MESNA on BF formation was evaluated, and the inhibitory potency of MESNA against matured BF was assayed. The results revealed that MESNA inhibited early stage adhesion and formation of the E. coli BF, destroyed the mature BF membrane and reduced the EPS and extracellular proteins levels of the BF. In addition, the present study investigated the effects of MESNA on the expression of EPS‑ and adhesion protein‑associated genes using quantitative polymerase chain reaction analysis, which demonstrated that MESNA effectively inhibited the expression of these genes. These results suggested that MESNA possesses anti‑BF formation capability on E. coli in vitro and may be used as a potential reagent for the clinical treatment of E. coli BF‑associated infections.
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Affiliation(s)
- Sheng Chen
- Department of Pediatrics, Southwest Hospital of The Third Military Medical University, Chongqing 400038, P.R. China
| | - Nianhai He
- Department of Pediatrics, Southwest Hospital of The Third Military Medical University, Chongqing 400038, P.R. China
| | - Jialin Yu
- Department of Neonatology, Children's Hospital of Chongqing Medical University, Chongqing 400014, P.R. China
| | - Luquan Li
- Department of Neonatology, Children's Hospital of Chongqing Medical University, Chongqing 400014, P.R. China
| | - Fengjun Sun
- Department of Pharmacy, Southwest Hospital of The Third Military Medical University, Chongqing 400038, P.R. China
| | - Ying Hu
- Department of Pediatrics, Southwest Hospital of The Third Military Medical University, Chongqing 400038, P.R. China
| | - Rui Deng
- Department of Pediatrics, Southwest Hospital of The Third Military Medical University, Chongqing 400038, P.R. China
| | - Shiming Zhong
- Department of Pediatrics, Southwest Hospital of The Third Military Medical University, Chongqing 400038, P.R. China
| | - Leilei Shen
- Department of Pediatrics, Southwest Hospital of The Third Military Medical University, Chongqing 400038, P.R. China
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25
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Boda SK, Broda J, Schiefer F, Weber-Heynemann J, Hoss M, Simon U, Basu B, Jahnen-Dechent W. Cytotoxicity of Ultrasmall Gold Nanoparticles on Planktonic and Biofilm Encapsulated Gram-Positive Staphylococci. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:3183-3193. [PMID: 25712910 DOI: 10.1002/smll.201403014] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Revised: 02/04/2015] [Indexed: 06/04/2023]
Abstract
The emergence of multidrug resistant bacteria, especially biofilm-associated Staphylococci, urgently requires novel antimicrobial agents. The antibacterial activity of ultrasmall gold nanoparticles (AuNPs) is tested against two gram positive: S. aureus and S. epidermidis and two gram negative: Escherichia coli and Pseudomonas aeruginosa strains. Ultrasmall AuNPs with core diameters of 0.8 and 1.4 nm and a triphenylphosphine-monosulfonate shell (Au0.8MS and Au1.4MS) both have minimum inhibitory concentration (MIC) and minimum bactericidal concentration of 25 × 10(-6) m [Au]. Disc agar diffusion test demonstrates greater bactericidal activity of the Au0.8MS nanoparticles over Au1.4MS. In contrast, thiol-stabilized AuNPs with a diameter of 1.9 nm (AuroVist) cause no significant toxicity in any of the bacterial strains. Ultrasmall AuNPs cause a near 5 log bacterial growth reduction in the first 5 h of exposure, and incomplete recovery after 21 h. Bacteria show marked membrane blebbing and lysis in biofilm-associated bacteria treated with ultrasmall AuNP. Importantly, a twofold MIC dosage of Au0.8MS and Au1.4MS each cause around 80%-90% reduction in the viability of Staphylococci enveloped in biofilms. Altogether, this study demonstrates potential therapeutic activity of ultrasmall AuNPs as an effective treatment option against staphylococcal infections.
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Affiliation(s)
- Sunil Kumar Boda
- Helmholtz-Institute for Biomedical Engineering-Biointerface Laboratory, RWTH Aachen University, Germany
- Laboratory for Biomaterials, Materials Research Centre, Interdisciplinary Bio-Engineering Program, Indian Institute of Science, Bangalore, 560012, India
| | - Janine Broda
- Institute of Inorganic Chemistry, RWTH Aachen University, Germany
| | - Frank Schiefer
- Institute of Inorganic Chemistry, RWTH Aachen University, Germany
| | | | - Mareike Hoss
- Electron Microscopy Facility, Medical Faculty, RWTH Aachen University, Germany
| | - Ulrich Simon
- Institute of Inorganic Chemistry, RWTH Aachen University, Germany
| | - Bikramjit Basu
- Laboratory for Biomaterials, Materials Research Centre, Interdisciplinary Bio-Engineering Program, Indian Institute of Science, Bangalore, 560012, India
| | - Willi Jahnen-Dechent
- Helmholtz-Institute for Biomedical Engineering-Biointerface Laboratory, RWTH Aachen University, Germany
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26
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Sehmi SK, Noimark S, Bear JC, Peveler WJ, Bovis M, Allan E, MacRobert AJ, Parkin IP. Lethal photosensitisation of Staphylococcus aureus and Escherichia coli using crystal violet and zinc oxide-encapsulated polyurethane. J Mater Chem B 2015; 3:6490-6500. [DOI: 10.1039/c5tb00971e] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Bactericidal polymer surfaces were prepared by crystal violet and ZnO nanoparticle encapsulation, demonstrating 99.9% dark kill ofE. coli.
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Affiliation(s)
- Sandeep K. Sehmi
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
| | - Sacha Noimark
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
| | - Joseph C. Bear
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
| | - William J. Peveler
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
| | - Melissa Bovis
- UCL Division of Surgery and Interventional Science
- University College London
- London
- UK
| | - Elaine Allan
- Division of Microbial Diseases
- UCL Eastman Dental Institute
- University College London
- London
- UK
| | | | - Ivan P. Parkin
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
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27
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Tran N, Kelley MN, Tran PA, Garcia DR, Jarrell JD, Hayda RA, Born CT. Silver doped titanium oxide-PDMS hybrid coating inhibits Staphylococcus aureus and Staphylococcus epidermidis growth on PEEK. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 49:201-209. [PMID: 25686940 DOI: 10.1016/j.msec.2014.12.072] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 11/18/2014] [Accepted: 12/20/2014] [Indexed: 02/08/2023]
Abstract
Bacterial infection remains one of the most serious issues affecting the successful installation and retention of orthopedic implants. Many bacteria develop resistance to current antibiotics, which complicates or prevents traditional antibiotic-dependent eradication therapy. In this study, a hybrid coating of titanium dioxide and polydimethylsiloxane (PDMS) was synthesized to regulate the release of silver. The coatings were benefited from the antimicrobial activity of silver ion, the biocompatibility of titanium dioxide, and the flexibility of the polymer. Three studied silver doped coatings with different titanium dioxide-PDMS ratios effectively inhibited the attachment and growth of Staphylococcus aureus and Staphylococcus epidermidis in a dose-dependent manner. The coatings were successfully applied on the discs of polyether ether ketone (PEEK), a common spinal implant material and antibacterial property of these coatings was assessed via Kirby Bauer assay. More importantly, these selected coatings completely inhibited biofilm formation. The release study demonstrated that the release rate of silver from the coating depended on doping levels and also the ratios of titanium dioxide and PDMS. This result is crucial for designing coatings with desired silver release rate on PEEK materials for antimicrobial applications.
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Affiliation(s)
- Nhiem Tran
- Department of Orthopaedic Surgery, Alpert Medical School, Brown University, Providence, RI, USA; Weiss Center for Orthopaedic Trauma Research, Rhode Island Hospital, Providence, RI, USA
| | - Michael N Kelley
- Department of Orthopaedic Surgery, Alpert Medical School, Brown University, Providence, RI, USA; Weiss Center for Orthopaedic Trauma Research, Rhode Island Hospital, Providence, RI, USA
| | - Phong A Tran
- Department of Orthopaedic Surgery, Alpert Medical School, Brown University, Providence, RI, USA; Weiss Center for Orthopaedic Trauma Research, Rhode Island Hospital, Providence, RI, USA
| | - Dioscaris R Garcia
- Department of Orthopaedic Surgery, Alpert Medical School, Brown University, Providence, RI, USA; Weiss Center for Orthopaedic Trauma Research, Rhode Island Hospital, Providence, RI, USA
| | - John D Jarrell
- Department of Orthopaedic Surgery, Alpert Medical School, Brown University, Providence, RI, USA; BioIntraface Inc., North Kingstown, RI, USA
| | - Roman A Hayda
- Department of Orthopaedic Surgery, Alpert Medical School, Brown University, Providence, RI, USA; Weiss Center for Orthopaedic Trauma Research, Rhode Island Hospital, Providence, RI, USA
| | - Christopher T Born
- Department of Orthopaedic Surgery, Alpert Medical School, Brown University, Providence, RI, USA; Weiss Center for Orthopaedic Trauma Research, Rhode Island Hospital, Providence, RI, USA; BioIntraface Inc., North Kingstown, RI, USA.
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28
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Zhu X, Radovic-Moreno AF, Wu J, Langer R, Shi J. Nanomedicine in the Management of Microbial Infection - Overview and Perspectives. NANO TODAY 2014; 9:478-498. [PMID: 25267927 PMCID: PMC4175422 DOI: 10.1016/j.nantod.2014.06.003] [Citation(s) in RCA: 198] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
For more than 2 billion years, microbes have reigned on our planet, evolving or outlasting many obstacles they have encountered. In the 20th century, this trend took a dramatic turn with the introduction of antibiotics and vaccines. Nevertheless, since then, microbes have progressively eroded the effectiveness of previously successful antibiotics by developing resistance, and many infections have eluded conventional vaccine design approaches. Moreover, the emergence of resistant and more virulent strains of bacteria has outpaced the development of new antibiotics over the last few decades. These trends have had major economic and health impacts at all levels of the socioeconomic spectrum - we need breakthrough innovations that could effectively manage microbial infections and deliver solutions that stand the test of time. The application of nanotechnologies to medicine, or nanomedicine, which has already demonstrated its tremendous impact on the pharmaceutical and biotechnology industries, is rapidly becoming a major driving force behind ongoing changes in the antimicrobial field. Here we provide an overview on the current progress of nanomedicine in the management of microbial infection, including diagnosis, antimicrobial therapy, drug delivery, medical devices, and vaccines, as well as perspectives on the opportunities and challenges in antimicrobial nanomedicine.
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Affiliation(s)
- Xi Zhu
- Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
- West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Aleksandar F. Radovic-Moreno
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences & Technology, Cambridge, MA 02139, USA
| | - Jun Wu
- Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Robert Langer
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences & Technology, Cambridge, MA 02139, USA
| | - Jinjun Shi
- Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
- Harvard-MIT Division of Health Sciences & Technology, Cambridge, MA 02139, USA
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Anghel AG, Grumezescu AM, Chirea M, Grumezescu V, Socol G, Iordache F, Oprea AE, Anghel I, Holban AM. MAPLE fabricated Fe3O4@Cinnamomum verum antimicrobial surfaces for improved gastrostomy tubes. Molecules 2014; 19:8981-94. [PMID: 24979402 PMCID: PMC6271288 DOI: 10.3390/molecules19078981] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 06/14/2014] [Accepted: 06/23/2014] [Indexed: 11/17/2022] Open
Abstract
Cinnamomum verum-functionalized Fe3O4 nanoparticles of 9.4 nm in size were laser transferred by matrix assisted pulsed laser evaporation (MAPLE) technique onto gastrostomy tubes (G-tubes) for antibacterial activity evaluation toward Gram positive and Gram negative microbial colonization. X-ray diffraction analysis of the nanoparticle powder showed a polycrystalline magnetite structure, whereas infrared mapping confirmed the integrity of C. verum (CV) functional groups after the laser transfer. The specific topography of the deposited films involved a uniform thin coating together with several aggregates of bio-functionalized magnetite particles covering the G-tubes. Cytotoxicity assays showed an increase of the G-tube surface biocompatibility after Fe3O4@CV treatment, allowing a normal development of endothelial cells up to five days of incubation. Microbiological assays on nanoparticle-modified G-tube surfaces have proved an improvement of anti-adherent properties, significantly reducing both Gram negative and Gram positive bacteria colonization.
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Affiliation(s)
- Alina Georgiana Anghel
- ENT, "Carol Davila" University of Medicine and Pharmacy, Traian Vuia no.6, Bucharest 020956, Romania.
| | - Alexandru Mihai Grumezescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, Politehnica University of Bucharest, Polizu Street no 1-7, Bucharest 011061, Romania.
| | - Mariana Chirea
- Departamento de Química Fisica, Universidade de Vigo, 36310 Vigo, Pontevedra, Spain.
| | - Valentina Grumezescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, Politehnica University of Bucharest, Polizu Street no 1-7, Bucharest 011061, Romania.
| | - Gabriel Socol
- National Institute for Lasers, Plasma & Radiation Physics, Lasers Department, P.O. Box MG-36, Bucharest-Magurele, Bucharest 769231, Romania.
| | - Florin Iordache
- Flow Cytometry and Cell Therapy Laboratory, Institute of Cellular Biology and Pathology "Nicolae Simionescu" (ICBP), Bucharest 050568, Romania.
| | - Alexandra Elena Oprea
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, Politehnica University of Bucharest, Polizu Street no 1-7, Bucharest 011061, Romania.
| | - Ion Anghel
- ENT, "Carol Davila" University of Medicine and Pharmacy, Traian Vuia no.6, Bucharest 020956, Romania.
| | - Alina Maria Holban
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, Politehnica University of Bucharest, Polizu Street no 1-7, Bucharest 011061, Romania.
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Lin WT, Tan HL, Duan ZL, Yue B, Ma R, He G, Tang TT. Inhibited bacterial biofilm formation and improved osteogenic activity on gentamicin-loaded titania nanotubes with various diameters. Int J Nanomedicine 2014; 9:1215-30. [PMID: 24634583 PMCID: PMC3952900 DOI: 10.2147/ijn.s57875] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Titania nanotubes loaded with antibiotics can deliver a high concentration of antibiotics locally at a specific site, thereby providing a promising strategy to prevent implant-associated infections. In this study we have fabricated titania nanotubes with various diameters (80, 120, 160, and 200 nm) and 200 nm length via electrochemical anodization. These nanotubes were loaded with 2 mg of gentamicin using a lyophilization method and vacuum drying. A standard strain, Staphylococcus epidermidis (American Type Culture Collection 35984), and two clinical isolates, S. aureus 376 and S. epidermidis 389, were selected to investigate the anti-infective ability of the gentamicin-loaded nanotubes (NT-G). Flat titanium (FlatTi) and nanotubes with no drug loading (NT) were also investigated and compared. We found that NT-G could significantly inhibit bacterial adhesion and biofilm formation compared to FlatTi or NT, and the NT-G with 160 nm and 200 nm diameters had stronger antibacterial activity because of the extended drug release time of NT-G with larger diameters. The NT also exhibited greater antibacterial ability than the FlatTi, while nanotubes with 80 nm or 120 nm diameters had better effects. Furthermore, human marrow derived mesenchymal stem cells were used to evaluate the effect of nanotubular topographies on the osteogenic differentiation of mesenchymal stem cells. Our results showed that NT-G and NT, especially those with 80 nm diameters, significantly promoted cell attachment, proliferation, spreading, and osteogenic differentiation when compared to FlatTi, and there was no significant difference between NT-G and NT with the same diameter. Therefore, nanotube modification and gentamicin loading can significantly improve the antibacterial ability and osteogenic activity of orthopedic implants.
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Affiliation(s)
- Wen-tao Lin
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Hong-lue Tan
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Zhao-ling Duan
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Bing Yue
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Rui Ma
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Guo He
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Ting-ting Tang
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
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Svensson S, Forsberg M, Hulander M, Vazirisani F, Palmquist A, Lausmaa J, Thomsen P, Trobos M. Role of nanostructured gold surfaces on monocyte activation and Staphylococcus epidermidis biofilm formation. Int J Nanomedicine 2014; 9:775-94. [PMID: 24550671 PMCID: PMC3925225 DOI: 10.2147/ijn.s51465] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The role of material surface properties in the direct interaction with bacteria and the indirect route via host defense cells is not fully understood. Recently, it was suggested that nanostructured implant surfaces possess antimicrobial properties. In the current study, the adhesion and biofilm formation of Staphylococcus epidermidis and human monocyte adhesion and activation were studied separately and in coculture in different in vitro models using smooth gold and well-defined nanostructured gold surfaces. Two polystyrene surfaces were used as controls in the monocyte experiments. Fluorescent viability staining demonstrated a reduction in the viability of S. epidermidis close to the nanostructured gold surface, whereas the smooth gold correlated with more live biofilm. The results were supported by scanning electron microscopy observations, showing higher biofilm tower formations and more mature biofilms on smooth gold compared with nanostructured gold. Unstimulated monocytes on the different substrates demonstrated low activation, reduced gene expression of pro- and anti-inflammatory cytokines, and low cytokine secretion. In contrast, stimulation with opsonized zymosan or opsonized live S. epidermidis for 1 hour significantly increased the production of reactive oxygen species, the gene expression of tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), IL-6, and IL-10, as well as the secretion of TNF-α, demonstrating the ability of the cells to elicit a response and actively phagocytose prey. In addition, cells cultured on the smooth gold and the nanostructured gold displayed a different adhesion pattern and a more rapid oxidative burst than those cultured on polystyrene upon stimulation. We conclude that S. epidermidis decreased its viability initially when adhering to nanostructured surfaces compared with smooth gold surfaces, especially in the bacterial cell layers closest to the surface. In contrast, material surface properties neither strongly promoted nor attenuated the activity of monocytes when exposed to zymosan particles or S. epidermidis.
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Affiliation(s)
- Sara Svensson
- Department of Biomaterials, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden ; BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, Gothenburg, Sweden
| | - Magnus Forsberg
- Department of Biomaterials, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden ; BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, Gothenburg, Sweden
| | - Mats Hulander
- Department of Biomaterials, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden ; BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, Gothenburg, Sweden
| | - Forugh Vazirisani
- Department of Biomaterials, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden ; BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, Gothenburg, Sweden
| | - Anders Palmquist
- Department of Biomaterials, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden ; BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, Gothenburg, Sweden
| | - Jukka Lausmaa
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, Gothenburg, Sweden ; SP Technical Research Institute of Sweden, Borås, Sweden
| | - Peter Thomsen
- Department of Biomaterials, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden ; BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, Gothenburg, Sweden
| | - Margarita Trobos
- Department of Biomaterials, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden ; BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, Gothenburg, Sweden
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Abstract
During the last decade, various functional nanostructured materials with interesting optical, magnetic, mechanical and chemical properties have been extensively applied to biomedical areas including imaging, diagnosis and therapy. In therapeutics, most research has focused on the application of nanoparticles as potential delivery vehicles for drugs and genes, because nanoparticles in the size range of 2-100 nm can interact with biological systems at the molecular level, and allow targeted delivery and passage through biological barriers. Recent investigations have even revealed that several kinds of nanomaterials are intrinsically therapeutic. Not only can they passively interact with cells, but they can also actively mediate molecular processes to regulate cell functions. This can be seen in the treatment of cancer via anti-angiogenic mechanisms as well as the treatment of neurodegenerative diseases by effectively controlling oxidative stress. This review will present recent applications of inorganic nanoparticles as therapeutic agents in the treatment of disease.
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Affiliation(s)
- Taeho Kim
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Korea. School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, Korea
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de Souza e Silva JM, Pastorello M, Kobarg J, Cardoso MB, Mazali IO. Selective Synthesis of Silver Nanoparticles onto Potassium Hexaniobate: Structural Organisation with Bactericidal Properties. Chemphyschem 2013; 14:4075-83. [DOI: 10.1002/cphc.201300855] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Indexed: 01/07/2023]
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Young MD, Tran N, Tran PA, Jarrell JD, Hayda RA, Born CT. Niobium oxide-polydimethylsiloxane hybrid composite coatings for tuning primary fibroblast functions. J Biomed Mater Res A 2013; 102:1478-85. [DOI: 10.1002/jbm.a.34832] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 04/10/2013] [Accepted: 06/03/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Matthew D. Young
- Alpert Medical School; Brown University; Providence Rhode Island 02903
| | - Nhiem Tran
- Alpert Medical School; Brown University; Providence Rhode Island 02903
- Department of Orthopaedics; Rhode Island Hospital; Providence Rhode Island 02903
| | - Phong A. Tran
- Alpert Medical School; Brown University; Providence Rhode Island 02903
- Department of Orthopaedics; Rhode Island Hospital; Providence Rhode Island 02903
| | - John D. Jarrell
- Department of Orthopaedics; Rhode Island Hospital; Providence Rhode Island 02903
- BioIntraface Inc.; North Kingstown Rhode Island 02852
| | - Roman A. Hayda
- Alpert Medical School; Brown University; Providence Rhode Island 02903
- Department of Orthopaedics; Rhode Island Hospital; Providence Rhode Island 02903
| | - Chistopher T. Born
- Alpert Medical School; Brown University; Providence Rhode Island 02903
- Department of Orthopaedics; Rhode Island Hospital; Providence Rhode Island 02903
- BioIntraface Inc.; North Kingstown Rhode Island 02852
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35
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Tran N, Tran PA, Jarrell JD, Engiles JB, Thomas NP, Young MD, Hayda RA, Born CT. In vivo caprine model for osteomyelitis and evaluation of biofilm-resistant intramedullary nails. BIOMED RESEARCH INTERNATIONAL 2013; 2013:674378. [PMID: 23841085 PMCID: PMC3693125 DOI: 10.1155/2013/674378] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Accepted: 05/17/2013] [Indexed: 12/14/2022]
Abstract
Bone infection remains a formidable challenge to the medical field. The goal of the current study is to evaluate antibacterial coatings in vitro and to develop a large animal model to assess coated bone implants. A novel coating consisting of titanium oxide and siloxane polymer doped with silver was created by metal-organic methods. The coating was tested in vitro using rapid screening techniques to determine compositions which inhibited Staphylococcus aureus growth, while not affecting osteoblast viability. The coating was then applied to intramedullary nails and evaluated in vivo in a caprine model. In this pilot study, a fracture was created in the tibia of the goat, and Staphylococcus aureus was inoculated directly into the bone canal. The fractures were fixed by either coated (treated) or non-coated intramedullary nails (control) for 5 weeks. Clinical observations as well as microbiology, mechanical, radiology, and histology testing were used to compare the animals. The treated goat was able to walk using all four limbs after 5 weeks, while the control was unwilling to bear weight on the fixed leg. These results suggest the antimicrobial potential of the hybrid coating and the feasibility of the goat model for antimicrobial coated intramedullary implant evaluation.
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Affiliation(s)
- Nhiem Tran
- Department of Orthopaedic Surgery, Alpert Medical School, Brown University, Suite 200, 2 Dudley Street, Providence, RI 02905, USA
- Weiss Center for Orthopaedic Trauma Research, Rhode Island Hospital, Providence, RI 02903, USA
| | - Phong A. Tran
- Department of Orthopaedic Surgery, Alpert Medical School, Brown University, Suite 200, 2 Dudley Street, Providence, RI 02905, USA
- Weiss Center for Orthopaedic Trauma Research, Rhode Island Hospital, Providence, RI 02903, USA
| | - John D. Jarrell
- Department of Orthopaedic Surgery, Alpert Medical School, Brown University, Suite 200, 2 Dudley Street, Providence, RI 02905, USA
- BioIntraface Inc., North Kingstown, RI 02852, USA
| | - Julie B. Engiles
- Department of Pathobiology, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA 19348, USA
| | - Nathan P. Thomas
- Department of Orthopaedic Surgery, Alpert Medical School, Brown University, Suite 200, 2 Dudley Street, Providence, RI 02905, USA
| | - Matthew D. Young
- Department of Orthopaedic Surgery, Alpert Medical School, Brown University, Suite 200, 2 Dudley Street, Providence, RI 02905, USA
| | - Roman A. Hayda
- Department of Orthopaedic Surgery, Alpert Medical School, Brown University, Suite 200, 2 Dudley Street, Providence, RI 02905, USA
- Weiss Center for Orthopaedic Trauma Research, Rhode Island Hospital, Providence, RI 02903, USA
| | - Christopher T. Born
- Department of Orthopaedic Surgery, Alpert Medical School, Brown University, Suite 200, 2 Dudley Street, Providence, RI 02905, USA
- Weiss Center for Orthopaedic Trauma Research, Rhode Island Hospital, Providence, RI 02903, USA
- BioIntraface Inc., North Kingstown, RI 02852, USA
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36
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Gholap H, Patil R, Yadav P, Banpurkar A, Ogale S, Gade W. CdTe-TiO2 nanocomposite: an impeder of bacterial growth and biofilm. NANOTECHNOLOGY 2013; 24:195101. [PMID: 23579550 DOI: 10.1088/0957-4484/24/19/195101] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The resurgence of infectious diseases and associated issues related to antibiotic resistance has raised enormous challenges which may possibly be confronted primarily by nanotechnology routes. One key need of critical significance in this context is the development of an agent capable of inhibiting quorum sensing mediated biofilm formation in pathogenic organisms. In this work we examine the possible use of a nanocomposite, CdTe-TiO2, as an impeder of growth and biofilm. In the presence of CdTe-TiO2, scanning electron microscopy (SEM) analysis shows exposed cells without the surrounding matrix. Confocal laser scanning microscopy shows spatially distributed fluorescence, a typical indication of an impeded biofilm, as opposed to the control which shows matrix-covered cells and continuous fluorescence, typical of biofilm formation. Quantitatively, the inhibition of biofilm was ∼57%. CdTe-TiO2 also exhibits good antibacterial properties against Gram positive and Gram negative organisms by virtue of the generation of reactive oxygen species inside the cells, reflected by a ruptured appearance in the SEM analysis.
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Affiliation(s)
- Haribhau Gholap
- National Chemical Laboratory (CSIR-NCL), Dr Homi Bhabha Road, Pashan, Pune, India
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Ramani M, Ponnusamy S, Muthamizhchelvan C, Cullen J, Krishnamurthy S, Marsili E. Morphology-directed synthesis of ZnO nanostructures and their antibacterial activity. Colloids Surf B Biointerfaces 2013; 105:24-30. [DOI: 10.1016/j.colsurfb.2012.12.056] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Revised: 12/07/2012] [Accepted: 12/22/2012] [Indexed: 11/29/2022]
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