1
|
Iskandar K, Pecastaings S, LeGac C, Salvatico S, Feuillolay C, Guittard M, Marchin L, Verelst M, Roques C. Demonstrating the In Vitro and In Situ Antimicrobial Activity of Oxide Mineral Microspheres: An Innovative Technology to Be Incorporated into Porous and Nonporous Materials. Pharmaceutics 2023; 15:pharmaceutics15041261. [PMID: 37111747 PMCID: PMC10144421 DOI: 10.3390/pharmaceutics15041261] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 03/26/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023] Open
Abstract
The antimicrobial activity of surfaces treated with zinc and/or magnesium mineral oxide microspheres is a patented technology that has been demonstrated in vitro against bacteria and viruses. This study aims to evaluate the efficiency and sustainability of the technology in vitro, under simulation-of-use conditions, and in situ. The tests were undertaken in vitro according to the ISO 22196:2011, ISO 20473:2013, and NF S90-700:2019 standards with adapted parameters. Simulation-of-use tests evaluated the robustness of the activity under worst-case scenarios. The in situ tests were conducted on high-touch surfaces. The in vitro results show efficient antimicrobial activity against referenced strains with a log reduction of >2. The sustainability of this effect was time-dependent and detected at lower temperatures (20 ± 2.5 °C) and humidity (46%) conditions for variable inoculum concentrations and contact times. The simulation of use proved the microsphere's efficiency under harsh mechanical and chemical tests. The in situ studies showed a higher than 90% reduction in CFU/25 cm2 per treated surface versus the untreated surfaces, reaching a targeted value of <50 CFU/cm2. Mineral oxide microspheres can be incorporated into unlimited surface types, including medical devices, to efficiently and sustainably prevent microbial contamination.
Collapse
Affiliation(s)
- Katia Iskandar
- Department of Pharmacy, School of Pharmacy, Lebanese International University, Bekaa P.O. Box 146404, Lebanon
- National Institute of Public Health, Clinical Epidemiology, and Toxicology-Lebanon (INSPECT-LB), Beirut 6573, Lebanon
| | - Sophie Pecastaings
- Laboratoire de Génie Chimique, Faculté de Pharmacie, Université de Toulouse, CNRS, INPT, UPS, 31062 Toulouse, France
| | - Céline LeGac
- FONDEREPHAR, Faculté de Pharmacie, 31062 Toulouse, France
| | | | | | - Mylène Guittard
- Pylote SAS, 22 Avenue de la Mouyssaguèse, 31280 Drémil-Lafage, France
| | - Loïc Marchin
- Pylote SAS, 22 Avenue de la Mouyssaguèse, 31280 Drémil-Lafage, France
| | - Marc Verelst
- CEMES, UPR CNRS 8011, 29 Rue Jeanne Marvig, CEDEX, 31055 Toulouse, France
| | - Christine Roques
- Laboratoire de Génie Chimique, Faculté de Pharmacie, Université de Toulouse, CNRS, INPT, UPS, 31062 Toulouse, France
- FONDEREPHAR, Faculté de Pharmacie, 31062 Toulouse, France
| |
Collapse
|
2
|
Soni M, Handa M, Singh KK, Shukla R. Recent nanoengineered diagnostic and therapeutic advancements in management of Sepsis. J Control Release 2022; 352:931-945. [PMID: 36273527 PMCID: PMC9665001 DOI: 10.1016/j.jconrel.2022.10.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 10/15/2022] [Accepted: 10/17/2022] [Indexed: 11/17/2022]
Abstract
COVID-19 acquired symptoms have affected the worldwide population and increased the load of Intensive care unit (ICU) patient admissions. A large number of patients admitted to ICU end with a deadly fate of mortality. A high mortality rate of patients was reported with hospital-acquired septic shock that leads to multiple organ failures and ultimately ends with death. The patients who overcome this septic shock suffer from morbidity that also affects their caretakers. To overcome these situations, scientists are exploring progressive theragnostic techniques with advanced techniques based on biosensors, biomarkers, biozymes, vesicles, and others. These advanced techniques pave the novel way for early detection of sepsis-associated symptoms and timely treatment with appropriate antibiotics and immunomodulators and prevent the undue effect on other parts of the body. There are other techniques like externally modulated electric-based devices working on the principle of piezoelectric mechanism that not only sense the endotoxin levels but also target them with a loaded antibiotic to neutralize the onset of inflammatory response. Recently researchers have developed a lipopolysaccharide (LPS) neutralizing cartridge that not only senses the LPS but also appropriately neutralizes with dual mechanistic insights of antibiotic and anti-inflammatory effects. This review will highlight recent developments in the new nanotechnology-based approaches for the diagnosis and therapeutics of sepsis that is responsible for the high number of deaths of patients suffering from this critical disease.
Collapse
Affiliation(s)
- Mukesh Soni
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research-Raebareli, Lucknow 226002, U.P., India
| | - Mayank Handa
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research-Raebareli, Lucknow 226002, U.P., India
| | - Kamalinder K. Singh
- School of Pharmacy and Biomedical Sciences, Faculty of Clinical and Biomedical Sciences, University of Central Lancashire, Preston PR1 2HE, UK,Correspondence to: Prof. Kamalinder K. Singh, School of Pharmacy and Biomedical Sciences, Faculty of Clinical and Biomedical Sciences, University of Central Lancashire, Preston PR1 2HE, United Kingdom
| | - Rahul Shukla
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research-Raebareli, Lucknow 226002, U.P., India,School of Pharmacy and Biomedical Sciences, Faculty of Clinical and Biomedical Sciences, University of Central Lancashire, Preston PR1 2HE, UK,Correspondence to: Dr. Rahul Shukla (M. Pharm. PhD), National Institute of Pharmaceutical Education and Research (NIPER-Raebareli), Bijnor-Sisendi Road, Sarojini Nagar, Near CRPF Base Camp, Lucknow 226002, UP, India
| |
Collapse
|
3
|
Bryant JA, Riordan L, Watson R, Nikoi ND, Trzaska W, Slope L, Tibbatts C, Alexander MR, Scurr DJ, May RC, de Cogan F. Developing Novel Biointerfaces: Using Chlorhexidine Surface Attachment as a Method for Creating Anti-Fungal Surfaces. GLOBAL CHALLENGES (HOBOKEN, NJ) 2022; 6:2100138. [PMID: 35602408 PMCID: PMC9121760 DOI: 10.1002/gch2.202100138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 02/10/2022] [Indexed: 06/15/2023]
Abstract
There is an increasing focus in healthcare environments on combatting antimicrobial resistant infections. While bacterial infections are well reported, infections caused by fungi receive less attention, yet have a broad impact on society and can be deadly. Fungi are eukaryotes with considerable shared biology with humans, therefore limited technologies exist to combat fungal infections and hospital infrastructure is rarely designed for reducing microbial load. In this study, a novel antimicrobial surface (AMS) that is modified with the broad-spectrum biocide chlorhexidine is reported. The surfaces are shown to kill the opportunistic fungal pathogens Candida albicans and Cryptococcus neoformans very rapidly (<15 min) and are significantly more effective than current technologies available on the commercial market, such as silver and copper.
Collapse
Affiliation(s)
- Jack A. Bryant
- Institute of Microbiology and InfectionUniversity of BirminghamBirminghamB15 2TTUK
| | - Lily Riordan
- Institute of Microbiology and InfectionUniversity of BirminghamBirminghamB15 2TTUK
| | - Rowan Watson
- Institute of Microbiology and InfectionUniversity of BirminghamBirminghamB15 2TTUK
| | - Naa Dei Nikoi
- Institute of Microbiology and InfectionUniversity of BirminghamBirminghamB15 2TTUK
| | - Wioleta Trzaska
- School of BiosciencesUniversity of BirminghamBirminghamB15 2TTUK
| | - Louise Slope
- Institute of Microbiology and InfectionUniversity of BirminghamBirminghamB15 2TTUK
| | - Callum Tibbatts
- Institute of Microbiology and InfectionUniversity of BirminghamBirminghamB15 2TTUK
| | - Morgan R. Alexander
- Advanced Materials and Healthcare Technologies DivisionSchool of PharmacyUniversity of NottinghamNottinghamNG7 2RDUK
| | - David J. Scurr
- Advanced Materials and Healthcare Technologies DivisionSchool of PharmacyUniversity of NottinghamNottinghamNG7 2RDUK
| | - Robin C. May
- School of BiosciencesUniversity of BirminghamBirminghamB15 2TTUK
| | - Felicity de Cogan
- Institute of Microbiology and InfectionUniversity of BirminghamBirminghamB15 2TTUK
| |
Collapse
|
4
|
Shi Y, Zhu ML, Wu Q, Huang Y, Xu XL, Chen W. The Potential of Drug Delivery Nanosystems for Sepsis Treatment. J Inflamm Res 2021; 14:7065-7077. [PMID: 34984019 PMCID: PMC8702780 DOI: 10.2147/jir.s339113] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 12/08/2021] [Indexed: 12/19/2022] Open
Abstract
Sepsis is a major immune response disorder caused by infection, with very high incidence and mortality rates. In the clinic, sepsis and its complications are mainly controlled and treated with antibiotics, anti-inflammatory, and antioxidant drugs. However, these treatments have some shortcomings, such as rapid metabolism and severe side effects. The emergence of drug delivery nanosystems can significantly improve tissue permeability, prolong drugs' circulation time, and reduce side effects. In this paper, we reviewed recent drug delivery nanosystems designed for sepsis treatment based on their mechanisms (anti-bacterial, anti-inflammatory, and antioxidant). Although great progress has been made recently, clinical practice transformation is still very difficult. Therefore, we also discussed key obstacles, including tissue distribution, overcoming bacterial resistance, and single treatment modes. Finally, a rigorous optimization of drug delivery nanosystems is expected to present great potential for sepsis therapy.
Collapse
Affiliation(s)
- Yi Shi
- ICU, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, People’s Republic of China
| | - Meng-Lu Zhu
- Department of Pharmacy, Fourth Affiliated Hospital, School of Medicine, Zhejiang University, Yiwu, 310006, People’s Republic of China
| | - Qian Wu
- ICU, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, People’s Republic of China
| | - Yi Huang
- ICU, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, People’s Republic of China
| | - Xiao-Ling Xu
- Shulan International Medical College, Zhejiang Shuren University, Hangzhou, 310004, People’s Republic of China
| | - Wei Chen
- ICU, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, People’s Republic of China
| |
Collapse
|
5
|
Abstract
OBJECTIVE Environmental surfaces may serve as potential reservoirs for nosocomial pathogens and facilitate transmissions via contact depending on its tenacity. This study provides data on survival kinetics of the most important nosocomial bacteria on a panel of commonly used surfaces. Type strains of S. aureus, K. pneumoniae, P. aeruginosa, A. baumannii, S. marcescens, E. faecium, E. coli, and E. cloacae were suspended in 0.9% NaCl solution at a McFarland of 1 and got then plated via cotton swabs either on glass, polyvinyl chloride, stainless steel, or aluminum. Surfaces were stored at regular ambient temperature and humidity to simulate routine daycare conditions. Sampling was performed by contact plates for a time period of four weeks. RESULTS The longest survival was observed for A. baumannii and E. faecium on all materials (at least four weeks). S. aureus remained viable for at least one week. Gram negative species other than A. baumannii were usually inactivated in less than two days. Nosocomial transmission of the above mentioned bacteria may easily occur if no appropriate infection control measures are applied on a regular daily basis. This might be of particular importance when dealing with outbreaks of A. baumannii and E. faecium.
Collapse
|
6
|
Persistence of Pathogens on Inanimate Surfaces: A Narrative Review. Microorganisms 2021; 9:microorganisms9020343. [PMID: 33572303 PMCID: PMC7916105 DOI: 10.3390/microorganisms9020343] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 01/27/2021] [Accepted: 02/01/2021] [Indexed: 12/21/2022] Open
Abstract
For the prevention of infectious diseases, knowledge about transmission routes is essential. In addition to respiratory, fecal-oral, and sexual transmission, the transfer of pathogens via surfaces plays a vital role for human pathogenic infections-especially nosocomial pathogens. Therefore, information about the survival of pathogens on surfaces can have direct implications on clinical measures, including hygiene guidelines and disinfection strategies. In this review, we reviewed the existing literature regarding viral, bacterial, and fungal persistence on inanimate surfaces. In particular, the current knowledge of the survival time and conditions of clinically relevant pathogens is summarized. While many pathogens persist only for hours, common nosocomial pathogens can survive for days to weeks under laboratory conditions and thereby potentially form a continuous source of transmission if no adequate inactivation procedures are performed.
Collapse
|
7
|
Papafilippou L, Claxton A, Dark P, Kostarelos K, Hadjidemetriou M. Nanotools for Sepsis Diagnosis and Treatment. Adv Healthc Mater 2021; 10:e2001378. [PMID: 33236524 DOI: 10.1002/adhm.202001378] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/07/2020] [Indexed: 12/12/2022]
Abstract
Sepsis is one of the leading causes of death worldwide with high mortality rates and a pathological complexity hindering early and accurate diagnosis. Today, laboratory culture tests are the epitome of pathogen recognition in sepsis. However, their consistency remains an issue of controversy with false negative results often observed. Clinically used blood markers, C reactive protein (CRP) and procalcitonin (PCT) are indicators of an acute-phase response and thus lack specificity, offering limited diagnostic efficacy. In addition to poor diagnosis, inefficient drug delivery and the increasing prevalence of antibiotic-resistant microorganisms constitute significant barriers in antibiotic stewardship and impede effective therapy. These challenges have prompted the exploration for alternative strategies that pursue accurate diagnosis and effective treatment. Nanomaterials are examined for both diagnostic and therapeutic purposes in sepsis. The nanoparticle (NP)-enabled capture of sepsis causative agents and/or sepsis biomarkers in biofluids can revolutionize sepsis diagnosis. From the therapeutic point of view, currently existing nanoscale drug delivery systems have proven to be excellent allies in targeted therapy, while many other nanotherapeutic applications are envisioned. Herein, the most relevant applications of nanomedicine for the diagnosis, prognosis, and treatment of sepsis is reviewed, providing a critical assessment of their potentiality for clinical translation.
Collapse
Affiliation(s)
- Lana Papafilippou
- Nanomedicine Lab Faculty of Biology Medicine and Health AV Hill Building The University of Manchester Manchester M13 9PT UK
| | - Andrew Claxton
- Department of Critical Care Salford Royal Foundation Trust Stott Lane Salford M6 8HD UK
| | - Paul Dark
- Manchester NIHR Biomedical Research Centre Division of Infection Immunity and Respiratory Medicine University of Manchester Manchester M13 9PT UK
| | - Kostas Kostarelos
- Nanomedicine Lab Faculty of Biology Medicine and Health AV Hill Building The University of Manchester Manchester M13 9PT UK
- Catalan Institute of Nanoscience and Nanotechnology (ICN2) Campus UAB Bellaterra Barcelona 08193 Spain
| | - Marilena Hadjidemetriou
- Nanomedicine Lab Faculty of Biology Medicine and Health AV Hill Building The University of Manchester Manchester M13 9PT UK
| |
Collapse
|
8
|
Zhang L, Jia G, Tang M, Chen C, Niu J, Huang H, Kang B, Pei J, Zeng H, Yuan G. Simultaneous enhancement of anti-corrosion, biocompatibility, and antimicrobial activities by hierarchically-structured brushite/Ag3PO4-coated Mg-based scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 111:110779. [DOI: 10.1016/j.msec.2020.110779] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 02/25/2020] [Accepted: 02/25/2020] [Indexed: 12/19/2022]
|
9
|
Aldosari MA, Alsaud KBB, Othman A, Al-Hindawi M, Faisal NH, Ahmed R, Michael FM, Krishnan MR, Asharaeh E. Microwave Irradiation Synthesis and Characterization of Reduced-(Graphene Oxide-(Polystyrene-Polymethyl Methacrylate))/Silver Nanoparticle Nanocomposites and their Anti-Microbial Activity. Polymers (Basel) 2020; 12:polym12051155. [PMID: 32443622 PMCID: PMC7285143 DOI: 10.3390/polym12051155] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 05/07/2020] [Accepted: 05/07/2020] [Indexed: 01/16/2023] Open
Abstract
Herein, we report a facile process for the preparation of styrene and methyl-methacrylate copolymer nanocomposites containing reduced graphene oxide and silver nanoparticles ((R-(GO-(PS-PMMA))/AgNPs)) by using (i) microwave irradiation (MWI) to obtain R-(GO-(PS-PMMA))/AgNPs and (ii) the in situ bulk polymerization technique to produce RGO/AgNPs-(PS-PMMA). Various characterization techniques, including FT-IR, XPS, Raman spectroscopy, XRD, SEM, HR-TEM, DSC, and TGA analysis, were used to characterize the prepared nanocomposites. The Berkovich nanoindentation method was employed to determine the hardness and elastic modulus of the nanocomposites. The results showed that the MWI-produced nanocomposites were found to have enhanced morphological, structural, and thermal properties compared with those of the nanocomposites prepared by the in situ method. In addition, the antibacterial activity of the prepared nanocomposites against the E. coli HB 101 K-12 was investigated, whereby an inhibition zone of 3 mm (RGO/AgNPs-(PS-PMMA) and 27 mm (R-(GO-(PS-PMMA))/AgNPs) was achieved. This indicates that the MWI-prepared nanocomposite has stronger antibacterial activity than the in situ-prepared nanocomposite.
Collapse
Affiliation(s)
- Mohammad A. Aldosari
- King Abdul-Aziz City for Science and Technology (KACST), Riyadh 12354, Saudi Arabia;
| | - Khaled Bin Bandar Alsaud
- Chemistry Department, College of Science and General Studies, Alfaisal University, Riyadh 11553, Saudi Arabia; (K.B.B.A.); (A.O.); (M.A.-H.); (F.M.M.); (M.R.K.)
| | - Ali Othman
- Chemistry Department, College of Science and General Studies, Alfaisal University, Riyadh 11553, Saudi Arabia; (K.B.B.A.); (A.O.); (M.A.-H.); (F.M.M.); (M.R.K.)
| | - Mohammed Al-Hindawi
- Chemistry Department, College of Science and General Studies, Alfaisal University, Riyadh 11553, Saudi Arabia; (K.B.B.A.); (A.O.); (M.A.-H.); (F.M.M.); (M.R.K.)
| | | | - Rehan Ahmed
- School of Engineering & Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK;
| | - Feven Mattwes Michael
- Chemistry Department, College of Science and General Studies, Alfaisal University, Riyadh 11553, Saudi Arabia; (K.B.B.A.); (A.O.); (M.A.-H.); (F.M.M.); (M.R.K.)
| | - Mohan Raj Krishnan
- Chemistry Department, College of Science and General Studies, Alfaisal University, Riyadh 11553, Saudi Arabia; (K.B.B.A.); (A.O.); (M.A.-H.); (F.M.M.); (M.R.K.)
| | - Edreese Asharaeh
- Chemistry Department, College of Science and General Studies, Alfaisal University, Riyadh 11553, Saudi Arabia; (K.B.B.A.); (A.O.); (M.A.-H.); (F.M.M.); (M.R.K.)
- Correspondence:
| |
Collapse
|
10
|
Polymeric Composites with Silver (I) Cyanoximates Inhibit Biofilm Formation of Gram-Positive and Gram-Negative Bacteria. Polymers (Basel) 2019; 11:polym11061018. [PMID: 31181853 PMCID: PMC6631325 DOI: 10.3390/polym11061018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 05/22/2019] [Accepted: 05/28/2019] [Indexed: 12/30/2022] Open
Abstract
Biofilms are surface-associated microbial communities known for their increased resistance to antimicrobials and host factors. This resistance introduces a critical clinical challenge, particularly in cases associated with implants increasing the predisposition for bacterial infections. Preventing such infections requires the development of novel antimicrobials or compounds that enhance bactericidal effect of currently available antibiotics. We have synthesized and characterized twelve novel silver(I) cyanoximates designated as Ag(ACO), Ag(BCO), Ag(CCO), Ag(ECO), Ag(PiCO), Ag(PICO) (yellow and red polymorphs), Ag(BIHCO), Ag(BIMCO), Ag(BOCO), Ag(BTCO), Ag(MCO) and Ag(PiPCO). The compounds exhibit a remarkable resistance to high intensity visible light, UV radiation and heat and have poor solubility in water. All these compounds can be well incorporated into the light-curable acrylate polymeric composites that are currently used as dental fillers or adhesives of indwelling medical devices. A range of dry weight % from 0.5 to 5.0 of the compounds was tested in this study. To study the potential of these compounds in preventing planktonic and biofilm growth of bacteria, we selected two human pathogens (Gram-negative Pseudomonas aeruginosa and Gram-positive Staphylococcus aureus) and Gram-positive environmental isolate Bacillus aryabhattai. Both planktonic and biofilm growth was abolished completely in the presence of 0.5% to 5% of the compounds. The most efficient inhibition was shown by Ag(PiCO), Ag(BIHCO) and Ag(BTCO). The inhibition of biofilm growth by Ag(PiCO)-yellow was confirmed by scanning electron microscopy (SEM). Application of Ag(BTCO) and Ag(PiCO)-red in combination with tobramycin, the antibiotic commonly used to treat P. aeruginosa infections, showed a significant synergistic effect. Finally, the inhibitory effect lasted for at least 120 h in P. aeruginosa and 36 h in S. aureus and B. aryabhattai. Overall, several silver(I) cyanoximates complexes efficiently prevent biofilm development of both Gram-negative and Gram-positive bacteria and present a particularly significant potential for applications against P. aeruginosa infections.
Collapse
|
11
|
Polystyrene-Poly(methyl methacrylate) Silver Nanocomposites: Significant Modification of the Thermal and Electrical Properties by Microwave Irradiation. MATERIALS 2016; 9:ma9060458. [PMID: 28773585 PMCID: PMC5456822 DOI: 10.3390/ma9060458] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 06/02/2016] [Accepted: 06/03/2016] [Indexed: 12/02/2022]
Abstract
This work compares the preparation of nanocomposites of polystyrene (PS), poly(methyl methacrylate) (PMMA), and PSMMA co-polymer containing silver nanoparticles (AgNPs) using in situ bulk polymerization with and without microwave irradiation (MWI). The AgNPs prepared were embedded within the polymer matrix. A modification in the thermal stability of the PS/Ag, PMMA/Ag, and PSMMA/Ag nanocomposites using MWI and in situ was observed compared with that of neat PSMMA, PS, and PMMA. In particular, PS/Ag, and PSMMA/Ag nanocomposites used in situ showed better thermal stability than MWI, while PMMA/Ag nanocomposites showed improved thermal stability. The electrical conductivity of the PS/Ag, PMMA/Ag, and PSMMA/Ag composites prepared by MWI revealed a percolation behavior when 20% AgNPs were used as a filler, and the conductivity of the nanocomposites increased to 103 S/cm, 33 S/cm, and 40 mS/cm, respectively. This enhancement might be due to the good dispersion of the AgNPs within the polymer matrix, which increased the interfacial interaction between the polymer and AgNPs. The polymer/Ag nanocomposites developed with tunable thermal and electrical properties could be used as conductive materials for electronic device applications.
Collapse
|
12
|
Kuuliala L, Pippuri T, Hultman J, Auvinen SM, Kolppo K, Nieminen T, Karp M, Björkroth J, Kuusipalo J, Jääskeläinen E. Preparation and antimicrobial characterization of silver-containing packaging materials for meat. Food Packag Shelf Life 2015. [DOI: 10.1016/j.fpsl.2015.09.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
13
|
Highly Bactericidal Polyurethane Effective Against Both Normal and Drug-Resistant Bacteria: Potential Use as an Air Filter Coating. Appl Biochem Biotechnol 2015; 178:1053-67. [DOI: 10.1007/s12010-015-1928-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 11/09/2015] [Indexed: 11/27/2022]
|
14
|
Antibacterial properties of metal and metalloid ions in chronic periodontitis and peri-implantitis therapy. Acta Biomater 2014; 10:3795-810. [PMID: 24704700 DOI: 10.1016/j.actbio.2014.03.028] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 03/07/2014] [Accepted: 03/26/2014] [Indexed: 12/21/2022]
Abstract
Periodontal diseases like periodontitis and peri-implantitis have been linked with Gram-negative anaerobes. The incorporation of various chemotherapeutic agents, including metal ions, into several materials and devices has been extensively studied against periodontal bacteria, and materials doped with metal ions have been proposed for the treatment of periodontal and peri-implant diseases. The aim of this review is to discuss the effectiveness of materials doped with metal and metalloid ions already used in the treatment of periodontal diseases, as well as the potential use of alternative materials that are currently available for other applications but have been proved to be cytotoxic to the specific periodontal pathogens. The sources of this review included English articles using Google Scholar™, ScienceDirect, Scopus and PubMed. Search terms included the combinations of the descriptors "disease", "ionic species" and "bacterium". Articles that discuss the biocidal properties of materials doped with metal and metalloid ions against the specific periodontal bacteria were included. The articles were independently extracted by two authors using predefined data fields. The evaluation of resources was based on the quality of the content and the relevance to the topic, which was evaluated by the ionic species and the bacteria used in the study, while the final application was not considered as relevant. The present review summarizes the extensive previous and current research efforts concerning the use of metal ions in periodontal diseases therapy, while it points out the challenges and opportunities lying ahead.
Collapse
|
15
|
Tammer I, Reuner J, Hartig R, Geginat G. Induction of Candida albicans biofilm formation on silver-coated vascular grafts. J Antimicrob Chemother 2014; 69:1282-5. [DOI: 10.1093/jac/dkt521] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
16
|
Galiano K, Pleifer C, Engelhardt K, Brössner G, Lackner P, Huck C, Lass-Flörl C, Obwegeser A. Silver segregation and bacterial growth of intraventricular catheters impregnated with silver nanoparticles in cerebrospinal fluid drainages. Neurol Res 2013; 30:285-7. [PMID: 17767809 DOI: 10.1179/016164107x229902] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
OBJECTIVES Intraventricular catheters impregnated with silver nanoparticles are developed to reduce catheter-associated infections in cerebrospinal fluid (CSF) drainages. Silver released from these new catheters should have an anti-microbacterial effect. This study examines the silver ion release and a potential effect of bacterial growth in an in vitro experiment. METHODS Seven original silver-coated ventricle catheters were rinsed thoroughly with an artificial CSF for 6 days. The collecting containers were replaced every 24 hours. In these samples, ion concentrations of silver were determined via trace analysis through atomic absorption spectroscopy. Furthermore, a bacterial growth was conducted on silver-impregnated and non-impregnated catheters. RESULTS In none of the samples, a concentration of silver ions could be detected. For Staphylococcus aureus, a slightly decreased bacterial growth could be observed with silver-impregnated catheters. DISCUSSION There is no risk of a toxic effect due to silver release into the CSF. However, the in vivo antibacterial effect has to be further investigated. We recommend clinical trials to prove the oligodynamic and anti-microbacterial effects of silver-impregnated ventricular catheters.
Collapse
Affiliation(s)
- Klaus Galiano
- Department of Neurosurgery, Innsbruck Medical University, 6020 Innsbruck, Austria.
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Lloret E, Picouet P, Fernández A. Matrix effects on the antimicrobial capacity of silver based nanocomposite absorbing materials. Lebensm Wiss Technol 2012. [DOI: 10.1016/j.lwt.2012.01.042] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
18
|
Ilg Y, Kreyenschmidt J. Effects of food components on the antimicrobial activity of polypropylene surfaces containing silver ions (Ag+). Int J Food Sci Technol 2011. [DOI: 10.1111/j.1365-2621.2011.02641.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
19
|
Abstract
The expanding use of vascular catheters has increased the need to prevent hazardous infectious complications. Since bloodstream infection is the most common serious complication of indwelling vascular catheters, the proof that a potentially preventive approach is truly protective against clinical infection requires a significant reduction in the incidence of this infectious complication.Although catheter colonization is a prelude to infection, most colonized catheters do not result in catheter-related infection and, therefore, a mere reduction in catheter colonization does not, in and by itself, confirm protection against clinical infection. Adherence to optimal infection control guidelines is the primary measure for preventing infection, but in most instances the level of adherence to guidelines drops subsequent to the initial surge that follows the institutional adoption of educational programs. This explains the need to assess the potential clinical protection afforded by anti-infective technologies. In addition to improving patient care, a clinically protective anti-infective approach can also bring tremendous cost savings.
Collapse
Affiliation(s)
- R O Darouiche
- Center for Prostheses Infection and Infectious Disease Section, Michael E. Debakey Veterans Affairs Medical Center and Baylor College of Medicine, Houston, Texas 77030, USA.
| |
Collapse
|
20
|
Chen HQ, Luo FB, Liu Y, Liang AN, Lin B, Wang L. Application of functional CdS nanoparticles in determination of silver ion by resonance light-scattering technique. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 71:1701-1703. [PMID: 18676197 DOI: 10.1016/j.saa.2008.06.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2007] [Revised: 06/15/2008] [Accepted: 06/23/2008] [Indexed: 05/26/2023]
Abstract
Based on the strong enhancement effect of silver ion on resonance light-scattering intensity of functional CdS nanoparticles, a new direct quantitative determination method for silver ion was established. Under the optimum conditions, the response signal is linearly proportional to the concentration of silver ion. The linear range is 5.0x10(-9)-2.0x10(-6) mol L(-1). The proposed method was applied to determine silver ion in river water samples.
Collapse
Affiliation(s)
- Hong-Qi Chen
- College of Chemistry and Materials Science, Anhui Key Laboratory of Chemical Biosensor, Anhui Normal University, Wuhu 241000, PR China
| | | | | | | | | | | |
Collapse
|
21
|
Wang L, Liang AN, Chen HQ, Liu Y, Qian BB, Fu J. Ultrasensitive determination of silver ion based on synchronous fluorescence spectroscopy with nanoparticles. Anal Chim Acta 2008; 616:170-6. [DOI: 10.1016/j.aca.2008.04.027] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2008] [Revised: 04/09/2008] [Accepted: 04/10/2008] [Indexed: 11/27/2022]
|
22
|
Coleman DC, O'Donnell MJ, Shore AC, Swan J, Russell RJ. The role of manufacturers in reducing biofilms in dental chair waterlines. J Dent 2007; 35:701-11. [PMID: 17576035 DOI: 10.1016/j.jdent.2007.05.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2007] [Revised: 05/03/2007] [Accepted: 05/08/2007] [Indexed: 01/23/2023] Open
Abstract
OBJECTIVES This paper reviews how dental chair unit (DCU) manufacturers can contribute practically to resolving the problem of biofilm formation in dental unit waterlines (DUWs). STUDY SELECTION The review concentrates on how novel developments and changes in a range of specific areas have, and might contribute to DUW biofilm control. These include (i) DCU engineering and design changes; (ii) improvements to DCU supply water quality; (iii) development of automated DUW treatment procedures that are effective at controlling biofilm in the long-term, safe for patients and dental staff, environmentally friendly and which do not exhibit adverse effects on DCU components after prolonged use. SOURCES The majority of the material contained in this review is based on, or supported by the peer-reviewed literature. DATA The current consensus from the literature reveals that the emphasis on DUW biofilm and its control has focused on describing the problem and its control using a range of periodic and residual DUW treatment agents. Unfortunately, until recently, DCU manufacturers have provided very little specific guidance in this regard. Indeed, ensuring that DCUs provide good quality output water has generally been regarded to be the responsibility of dental practitioners. Some recent studies have shown that novel DCUs with integral semi-automated or automated DUW cleaning systems can effectively control DUW biofilm in the long-term. However, there are other potential DCU engineering and design changes that DCU manufacturers could undertake to further improve DUW biofilm control. CONCLUSIONS DCU manufacturers can significantly contribute to controlling the problem of DUW biofilm.
Collapse
Affiliation(s)
- D C Coleman
- Microbiology Research Unit, Division of Oral Biosciences, Dublin Dental School & Hospital, University of Dublin, Trinity College Dublin, Lincoln Place, Dublin 2, Ireland.
| | | | | | | | | |
Collapse
|
23
|
Bhende S, Barbolt T, Rothenburger S, Piccoli L. Infection Potentiation Study of Synthetic and Naturally Derived Surgical Mesh in Mice. Surg Infect (Larchmt) 2007; 8:405-14. [PMID: 17635064 DOI: 10.1089/sur.2005.061] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE To evaluate the potential of synthetic surgical meshes (Marlex((R)) mesh [C.R. Bard, Inc., Murray Hill, NJ]; MYCROMESH PLUS [W.L. Gore and Associates, Inc., Flagstaff, AZ]; GYNECARE GYNEMESH Nonabsorbable PROLENE* Soft Mesh [Ethicon, Somerville, NJ]; and naturally derived surgical mesh materials (DermMatrix) [Carbon Medical Technologies, St. Paul, MN] and SURGISIS [Cook Surgical, Spencer, IN]) to serve as a nidus for microbial attachment and growth, thus exacerbating surgical site infection. METHODS Meshes were implanted subcutaneously in mice and inoculated with 10(4) colony-forming units (cfu) of Staphylococcus aureus. Mice were euthanized four days later, and the implants were removed, homogenized, and cultured using a standard agar pour plate method to determine the number of viable bacteria that could be recovered from each implant. RESULTS The Marlex mesh and Gynecare Gynemesh PS were comparable and "neutral" to infection, the average number of bacteria recovered being 1.61 x 10(5) and 5.41 x 10(4) cfu, respectively. Mycromesh Plus, with its antibacterial coating, resulted in a reduction in the number of bacteria recovered, the average being 1.61 x 10(1) cfu. Naturally derived meshes were considered to potentiate infection on the basis of macroscopic observation of infection and significantly increased numbers of bacteria recovered from the implant: 1.84 x 10(8) cfu from DermMatrix and 3.17 x 10(7) cfu from Surgisis. CONCLUSION The synthetic meshes did not potentiate infection in this model, whereas the naturally-derived materials did. As this preclinical model was able to detect differences between different implant materials, it may have utility in assessing the infection potentiation properties of newly developed materials.
Collapse
|
24
|
De Prijck K, Nelis H, Coenye T. Efficacy of silver-releasing rubber for the prevention of Pseudomonas aeruginosa biofilm formation in water. BIOFOULING 2007; 23:405-411. [PMID: 17934912 DOI: 10.1080/08927010701647861] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The aim of the present study was to evaluate the efficacy of Elastoguard silver-releasing rubber in preventing Pseudomonas aeruginosa biofilm formation in water. Biofilm formation by P. aeruginosa under various conditions in an in vitro model system was compared for silver-releasing and conventional rubber. Under most conditions tested, the numbers of sessile cells attached to silver-releasing rubber were considerably lower with reference to conventional rubber, although the effect diminished with increasing volumes. The release of silver also resulted in a decrease in planktonic cells. By exposing both materials simultaneously to conditions for biofilm growth, it became obvious that the antibiofilm effect was due to a reduction in the number of planktonic cells, rather than to contact-dependent killing of sessile cells. The data demonstrate that the use of silver-releasing rubber reduces P. aeruginosa biofilm in water and reduces the number of planktonic cells present in the surrounding solution.
Collapse
Affiliation(s)
- Kristof De Prijck
- Laboratorium voor Farmaceutische Microbiologie, Universiteit Gent, Gent, Belgium
| | | | | |
Collapse
|
25
|
Kramer A, Schwebke I, Kampf G. How long do nosocomial pathogens persist on inanimate surfaces? A systematic review. BMC Infect Dis 2006; 6:130. [PMID: 16914034 PMCID: PMC1564025 DOI: 10.1186/1471-2334-6-130] [Citation(s) in RCA: 1366] [Impact Index Per Article: 75.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2006] [Accepted: 08/16/2006] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Inanimate surfaces have often been described as the source for outbreaks of nosocomial infections. The aim of this review is to summarize data on the persistence of different nosocomial pathogens on inanimate surfaces. METHODS The literature was systematically reviewed in MedLine without language restrictions. In addition, cited articles in a report were assessed and standard textbooks on the topic were reviewed. All reports with experimental evidence on the duration of persistence of a nosocomial pathogen on any type of surface were included. RESULTS Most gram-positive bacteria, such as Enterococcus spp. (including VRE), Staphylococcus aureus (including MRSA), or Streptococcus pyogenes, survive for months on dry surfaces. Many gram-negative species, such as Acinetobacter spp., Escherichia coli, Klebsiella spp., Pseudomonas aeruginosa, Serratia marcescens, or Shigella spp., can also survive for months. A few others, such as Bordetella pertussis, Haemophilus influenzae, Proteus vulgaris, or Vibrio cholerae, however, persist only for days. Mycobacteria, including Mycobacterium tuberculosis, and spore-forming bacteria, including Clostridium difficile, can also survive for months on surfaces. Candida albicans as the most important nosocomial fungal pathogen can survive up to 4 months on surfaces. Persistence of other yeasts, such as Torulopsis glabrata, was described to be similar (5 months) or shorter (Candida parapsilosis, 14 days). Most viruses from the respiratory tract, such as corona, coxsackie, influenza, SARS or rhino virus, can persist on surfaces for a few days. Viruses from the gastrointestinal tract, such as astrovirus, HAV, polio- or rota virus, persist for approximately 2 months. Blood-borne viruses, such as HBV or HIV, can persist for more than one week. Herpes viruses, such as CMV or HSV type 1 and 2, have been shown to persist from only a few hours up to 7 days. CONCLUSION The most common nosocomial pathogens may well survive or persist on surfaces for months and can thereby be a continuous source of transmission if no regular preventive surface disinfection is performed.
Collapse
Affiliation(s)
- Axel Kramer
- Institut für Hygiene und Umweltmedizin, Ernst-Moritz-Arndt Universität, Greifswald, Germany
| | | | - Günter Kampf
- Institut für Hygiene und Umweltmedizin, Ernst-Moritz-Arndt Universität, Greifswald, Germany
- Bode Chemie GmbH & Co. KG, Scientific Affairs, Hamburg, Germany
| |
Collapse
|
26
|
Resano M, Aramendía M, García-Ruiz E, Crespo C, Belarra MA. Solid sampling-graphite furnace atomic absorption spectrometry for the direct determination of silver at trace and ultratrace levels. Anal Chim Acta 2006; 571:142-9. [PMID: 17723432 DOI: 10.1016/j.aca.2006.04.037] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2006] [Revised: 04/13/2006] [Accepted: 04/18/2006] [Indexed: 11/22/2022]
Abstract
In this work, the possibilities of solid sampling-graphite furnace atomic absorption spectrometry for the direct determination of silver in solid samples of very different nature (a biological sample, a soil, an ore concentrate and a polymer) and showing substantial differences in their analyte content (from approximately, 40 ng g(-1) up to 350 microg g(-1)) have been evaluated, the goal always being to develop fast methods, only relying on the use of aqueous standards for calibration. Different factors had to be taken into account in order to develop suitable procedures for all the samples under investigation. Among the most important ones, the following can be mentioned: (i) optimization of the temperature program in order to selectively atomize the analyte; (ii) the use of chemical modifiers (such as Pd or HNO3), depending on the sample characteristics; (iii) appropriate wavelength, argon flow and sample mass selection (depending on the analyte content); (iv) the use of 3-field mode Zeeman-effect background correction in order to further expand the linear range up to 1000 ng of Ag, which was needed for analysis of the sample showing the highest Ag content (polypropylene). The procedures finally proposed show interesting features for the determination of silver in solid samples: the advantage of using aqueous standard solutions for calibration, a high sample throughput (approximately, 15 min per sample), a low detection limit (2 ng g(-1)), sufficient precision (R.S.D. values in the vicinity of 10%) and a reduced risk of analyte losses and contamination.
Collapse
Affiliation(s)
- M Resano
- Department of Analytical Chemistry, University of Zaragoza, E-50009 Zaragoza, Spain.
| | | | | | | | | |
Collapse
|
27
|
Chaw KC, Manimaran M, Tay FEH. Role of silver ions in destabilization of intermolecular adhesion forces measured by atomic force microscopy in Staphylococcus epidermidis biofilms. Antimicrob Agents Chemother 2006; 49:4853-9. [PMID: 16304145 PMCID: PMC1315927 DOI: 10.1128/aac.49.12.4853-4859.2005] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In this paper, we report on the potential use of atomic force microscopy (AFM) as a tool to measure the intermolecular forces in biofilm structures and to study the effect of silver ions on sessile Staphylococcus epidermidis cell viability and stability. We propose a strategy of destabilizing the biofilm matrix by reducing the intermolecular forces within the extracellular polymeric substances (EPSs) using a low concentration (50 ppb) of silver ions. Our AFM studies on the intermolecular forces within the EPSs of S. epidermidis RP62A and S.epidermidis 1457 biofilms suggest that the silver ions can destabilize the biofilm matrix by binding to electron donor groups of the biological molecules. This leads to reductions in the number of binding sites for hydrogen bonds and electrostatic and hydrophobic interactions and, hence, the destabilization of the biofilm structure.
Collapse
Affiliation(s)
- K C Chaw
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos #04-01, Singapore 138669
| | | | | |
Collapse
|
28
|
Strathmann M, Wingender J. Use of an oxonol dye in combination with confocal laser scanning microscopy to monitor damage to Staphylococcus aureus cells during colonisation of silver-coated vascular grafts. Int J Antimicrob Agents 2004; 24:234-40. [PMID: 15325426 DOI: 10.1016/j.ijantimicag.2003.03.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2003] [Accepted: 03/10/2004] [Indexed: 10/26/2022]
Abstract
The antimicrobial silver-coating of medical prostheses is regarded as a means to reduce the risk of bacterial colonisation after implantation. The effect of a silver-coating of vascular grafts on biofilm formation was assessed in batch cultures of Staphylococcus aureus, using confocal laser scanning microscopy. Total cells in biofilms were analysed by staining with the DNA-binding fluorochrome SYTO 62 and the proportion of damaged cells was quantified with the membrane potential-sensitive dye bis-(1,3-dibutylbarbituric acid) trimethine oxonol. Both the extent of biofilm formation and the proportion of viable biofilm cells were significantly diminished on the surface of the silver-coated vascular grafts compared with uncoated controls, probably due to the antimicrobial activity of silver ions released from the silver-coated graft surface.
Collapse
Affiliation(s)
- Martin Strathmann
- Department of Aquatic Microbiology, Institute for Interface Biotechnology, University of Duisburg-Essen, Geibelstrasse 41, 47057 Duisburg, Germany
| | | |
Collapse
|
29
|
Gray JE, Norton PR, Alnouno R, Marolda CL, Valvano MA, Griffiths K. Biological efficacy of electroless-deposited silver on plasma activated polyurethane. Biomaterials 2003; 24:2759-65. [PMID: 12711522 DOI: 10.1016/s0142-9612(03)00057-7] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Silver coating of catheters has been shown to have inhibitory effects on bacterial growth and adhesion to catheter surfaces. In this study, plasma-modification was used to enhance the adhesion of an electroless silver coating on polyurethane. Both the antibacterial and antiadhesive properties of these coatings were investigated. Bacterial growth was inhibited in cultures exposed to silver-treated polyurethane compared to unmodified polyurethane. Higher growth inhibition was observed for polyurethane surfaces with lower silver coverage. Bacterial adhesion was completely inhibited on all silver-coated surfaces.
Collapse
Affiliation(s)
- J E Gray
- Department of Chemistry and Interface Science Western, University of Western Ontario, London, Ontario, Canada N6A 5B7
| | | | | | | | | | | |
Collapse
|
30
|
Affiliation(s)
- Sigmund S Socransky
- Department of Periodontology, The Forsyth Institute, Boston, Massachusetts, USA
| | | |
Collapse
|
31
|
Schierholz JM, Yücel N, Rump AFE, Beuth J, Pulverer G. Antiinfective and encrustation-inhibiting materials--myth and facts. Int J Antimicrob Agents 2002; 19:511-6. [PMID: 12135842 DOI: 10.1016/s0924-8579(02)00096-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Catheters, urethral and ureteral stents and other urological implants are frequently affected by encrustration and infection due to their permanent contact with urine. Indwelling urinary catheters provide a haven for microorganisms and thus require extensive monitoring. Several surface modification techniques have been proposed to improve the performance of devices including the immobilization of biomolecules, the incorporation of hydrophilic grafts to reduce protein adsorption, the creation of hydrophobic surfaces, the creation of microdomains to regulate cellular and protein adhesion, new polymers and antimicrobial coatings. Physico-chemical explanation to elucidate the mechanism of such encrustation or infection inhibiting materials is still not available. Our series of experiments showed a marked decrease of silver-activity in biological fluids which corresponds with the controversial clinical results obtained with silver coated urinary catheters. Rifampicin/minocycline coated catheters had very low activity against Gram-negative rods, enterococci and Candida spp., the main causing organisms of urinary catheter infection. Surface engineered materials and antimicrobial drug delivery systems will be the next generation of sophisticated urinary catheters and stents, if both efficacy as well as efficiency has been proved clinically.
Collapse
Affiliation(s)
- Jörg Michael Schierholz
- Caesar-Center of Advanced European Studies and Research, Friedensplatz 16, D-53111 Bonn, Germany.
| | | | | | | | | |
Collapse
|
32
|
Darouiche RO. Anti-infective efficacy of silver-coated medical prostheses. Clin Infect Dis 1999; 29:1371-7; quiz 1378. [PMID: 10585781 DOI: 10.1086/313561] [Citation(s) in RCA: 166] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- R O Darouiche
- Center for Prostheses Infection, Baylor College of Medicine, Houston, TX 77030, USA.
| |
Collapse
|
33
|
Schierholz JM, Beuth J, Pulverer G, König DP. Silver-containing polymers. Antimicrob Agents Chemother 1999; 43:2819-20; author reply 2820-1. [PMID: 10651621 PMCID: PMC89571 DOI: 10.1128/aac.43.11.2819] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|