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Isoflavonoid-Antibiotic Thin Films Fabricated by MAPLE with Improved Resistance to Microbial Colonization. Molecules 2021; 26:molecules26123634. [PMID: 34198596 PMCID: PMC8231875 DOI: 10.3390/molecules26123634] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 06/08/2021] [Accepted: 06/09/2021] [Indexed: 11/17/2022] Open
Abstract
Staphylococcus aureus (Gram-positive) and Pseudomonas aeruginosa (Gram-negative) bacteria represent major infectious threats in the hospital environment due to their wide distribution, opportunistic behavior, and increasing antibiotic resistance. This study reports on the deposition of polyvinylpyrrolidone/antibiotic/isoflavonoid thin films by the matrix-assisted pulsed laser evaporation (MAPLE) method as anti-adhesion barrier coatings, on biomedical surfaces for improved resistance to microbial colonization. The thin films were characterized by Fourier transform infrared spectroscopy, infrared microscopy, and scanning electron microscopy. In vitro biological assay tests were performed to evaluate the influence of the thin films on the development of biofilms formed by Gram-positive and Gram-negative bacterial strains. In vitro biocompatibility tests were assessed on human endothelial cells examined for up to five days of incubation, via qualitative and quantitative methods. The results of this study revealed that the laser-fabricated coatings are biocompatible and resistant to microbial colonization and biofilm formation, making them successful candidates for biomedical devices and contact surfaces that would otherwise be amenable to contact transmission.
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Functional Bioglass-Biopolymer Double Nanostructure for Natural Antimicrobial Drug Extracts Delivery. NANOMATERIALS 2020; 10:nano10020385. [PMID: 32098412 PMCID: PMC7075305 DOI: 10.3390/nano10020385] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/19/2020] [Accepted: 02/20/2020] [Indexed: 12/27/2022]
Abstract
Aseptic loosening and periprosthetic infections are the main causes of implant failure. Strategies to mitigate this drawback are therefore mandatory to avoid primary and revision replacement surgeries. A functional bioapatite–biopolymer double nanostructure fabricated by matrix-assisted pulsed laser evaporation to prevent infection of orthopedic and dental implants could promote osseointegration and ensure controlled delivery of natural antimicrobial drugs. The synthesized nanostructure consists of two overlapping layers, the lower from a biocompatible polymer for anticorrosive protection, and the upper of bioactive glass incorporating antimicrobial plant extract, acting as a potential drug delivery system. Morphology, composition, adherence, ability for drug delivery and biological properties (cytotoxicity and antimicrobial effect) were studied. Structures proved compact and stable, conserving a remarkable drug delivery ability for more than 21 days, i.e., enough to ensure long-term microbes’ eradication.
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Successful Release of Voriconazole and Flavonoids from MAPLE Deposited Bioactive Surfaces. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9040786] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We explored the potential of biomimetic thin films fabricated by means of matrix-assisted pulsed laser evaporation (MAPLE) for releasing combinations of active substances represented by flavonoids (quercetin dihydrate and resveratrol) and antifungal compounds (amphotericin B and voriconazole) embedded in a polyvinylpyrrolidone biopolymer; the antifungal activity of the film components was evaluated using in vitro microbiological assays. Thin films were deposited using a pulsed KrF* excimer laser source which were structurally characterized using atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FTIR). High-quality thin films with chemical structures similar to dropcast ones were created using an optimum laser fluence of ~80 mJ/cm2. Bioactive substances were included within the polymer thin films using the MAPLE technique. The results of the in vitro microbiology assay, which utilized a modified disk diffusion approach and were performed using two fungal strains (Candida albicans American Type Culture Collection (ATCC) 90028 and Candida parapsilosis American Type Culture Collection (ATCC) 22019), revealed that voriconazole was released in an active form from the polyvinylpyrrolidone matrix. The results of this study show that the MAPLE-deposited bioactive thin films have a promising potential for use in designing combination devices, such as drug delivery devices, and medical device surfaces with antifungal activity.
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Floroian L, Ristoscu C, Mihailescu N, Negut I, Badea M, Ursutiu D, Chifiriuc MC, Urzica I, Dyia HM, Bleotu C, Mihailescu IN. Functionalized Antimicrobial Composite Thin Films Printing for Stainless Steel Implant Coatings. Molecules 2016; 21:molecules21060740. [PMID: 27294895 PMCID: PMC6274373 DOI: 10.3390/molecules21060740] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 06/01/2016] [Accepted: 06/02/2016] [Indexed: 01/24/2023] Open
Abstract
In this work we try to address the large interest existing nowadays in the better understanding of the interaction between microbial biofilms and metallic implants. Our aimed was to identify a new preventive strategy to control drug release, biofilm formation and contamination of medical devices with microbes. The transfer and printing of novel bioactive glass-polymer-antibiotic composites by Matrix-Assisted Pulsed Laser Evaporation into uniform thin films onto 316 L stainless steel substrates of the type used in implants are reported. The targets were prepared by freezing in liquid nitrogen mixtures containing polymer and antibiotic reinforced with bioglass powder. The cryogenic targets were submitted to multipulse evaporation by irradiation with an UV KrF* (λ = 248 nm, τFWHM ≤ 25 ns) excimer laser source. The prepared structures were analyzed by infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy and profilometry, before and after immersion in physiological fluids. The bioactivity and the release of the antibiotic have been evaluated. We showed that the incorporated antibiotic underwent a gradually dissolution in physiological fluids thus supporting a high local treatment efficiency. Electrochemical measurements including linear sweep voltammetry and impedance spectroscopy studies were carried out to investigate the corrosion resistance of the coatings in physiological environments. The in vitro biocompatibility assay using the MG63 mammalian cell line revealed that the obtained nanostructured composite films are non-cytotoxic. The antimicrobial effect of the coatings was tested against Staphylococcus aureus and Escherichia coli strains, usually present in implant-associated infections. An anti-biofilm activity was evidenced, stronger against E. coli than the S. aureus strain. The results proved that the applied method allows for the fabrication of implantable biomaterials which shield metal ion release and possess increased biocompatibility and resistance to microbial colonization and biofilm growth.
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Affiliation(s)
- Laura Floroian
- Faculty of Electrical Engineering and Computer Science, 1 Politehnicii Str., Transilvania University of Brasov, Brasov 500024, Romania.
| | - Carmen Ristoscu
- National Institute for Laser, Plasma and Radiation Physics, P.O. Box MG-36, Magurele, Ilfov RO-77125, Romania.
| | - Natalia Mihailescu
- National Institute for Laser, Plasma and Radiation Physics, P.O. Box MG-36, Magurele, Ilfov RO-77125, Romania.
| | - Irina Negut
- National Institute for Laser, Plasma and Radiation Physics, P.O. Box MG-36, Magurele, Ilfov RO-77125, Romania.
- Faculty of Physics, University of Bucharest, Magurele, Ilfov 077125, Romania.
| | - Mihaela Badea
- Faculty of Medicine, 56 N. Balcescu Str., Transilvania University of Brasov, Brasov 500019, Romania.
| | - Doru Ursutiu
- Faculty of Electrical Engineering and Computer Science, 1 Politehnicii Str., Transilvania University of Brasov, Brasov 500024, Romania.
| | - Mariana Carmen Chifiriuc
- Faculty of Biology, Research Institute of the University of Bucharest-ICUB, University of Bucharest, Spl. Independentei 91-95, Bucharest 050095, Romania.
| | - Iuliana Urzica
- National Institute for Laser, Plasma and Radiation Physics, P.O. Box MG-36, Magurele, Ilfov RO-77125, Romania.
| | - Hussien Mohammed Dyia
- Faculty of Biology, Research Institute of the University of Bucharest-ICUB, University of Bucharest, Spl. Independentei 91-95, Bucharest 050095, Romania.
| | - Coralia Bleotu
- "Stefan S. Nicolau" Institute of Virology, 285 Mihai Bravu Avenue, Bucharest 30304, Romania.
| | - Ion N Mihailescu
- National Institute for Laser, Plasma and Radiation Physics, P.O. Box MG-36, Magurele, Ilfov RO-77125, Romania.
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Janković A, Eraković S, Ristoscu C, Mihailescu Serban N, Duta L, Visan A, Stan GE, Popa AC, Husanu MA, Luculescu CR, Srdić VV, Janaćković D, Mišković-Stanković V, Bleotu C, Chifiriuc MC, Mihailescu IN. Structural and biological evaluation of lignin addition to simple and silver-doped hydroxyapatite thin films synthesized by matrix-assisted pulsed laser evaporation. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:5333. [PMID: 25578691 DOI: 10.1007/s10856-014-5333-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 07/28/2014] [Indexed: 06/04/2023]
Abstract
We report on thin film deposition by matrix-assisted pulsed laser evaporation of simple hydroxyapatite (HA) or silver (Ag) doped HA combined with the natural biopolymer organosolv lignin (Lig) (Ag:HA-Lig). Solid cryogenic target of aqueous dispersions of Ag:HA-Lig composite and its counterpart without silver (HA-Lig) were prepared for evaporation using a KrF* excimer laser source. The expulsed material was assembled onto TiO2/Ti substrata or silicon wafers and subjected to physical-chemical investigations. Smooth, uniform films adherent to substratum were observed. The chemical analyses confirmed the presence of the HA components, but also evidenced traces of Ag and Lig. Deposited HA was Ca deficient, which is indicative of a film with increased solubility. Recorded X-ray Diffraction patterns were characteristic for amorphous films. Lig presence in thin films was undoubtedly proved by both X-ray Photoelectron and Fourier Transform Infra-Red Spectroscopy analyses. The microbiological evaluation showed that the newly assembled surfaces exhibited an inhibitory activity both on the initial steps of biofilm forming, and on mature bacterial and fungal biofilm development. The intensity of the anti-biofilm activity was positively influenced by the presence of the Lig and/or Ag, in the case of Staphylococcus aureus, Pseudomonas aeruginosa and Candida famata biofilms. The obtained surfaces exhibited a low cytotoxicity toward human mesenchymal stem cells, being therefore promising candidates for fabricating implantable biomaterials with increased biocompatibility and resistance to microbial colonization and further biofilm development.
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Affiliation(s)
- A Janković
- Innovation Center, Faculty of Technology and Metallurgy, University of Belgrade, 11000, Belgrade, Serbia
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Holban AM, Grumezescu V, Grumezescu AM, Vasile BŞ, Truşcă R, Cristescu R, Socol G, Iordache F. Antimicrobial nanospheres thin coatings prepared by advanced pulsed laser technique. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2014; 5:872-880. [PMID: 24991524 PMCID: PMC4077416 DOI: 10.3762/bjnano.5.99] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 05/11/2014] [Indexed: 06/03/2023]
Abstract
We report on the fabrication of thin coatings based on polylactic acid-chitosan-magnetite-eugenol (PLA-CS-Fe3O4@EUG) nanospheres by matrix assisted pulsed laser evaporation (MAPLE). Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) investigation proved that the homogenous Fe3O4@EUG nanoparticles have an average diameter of about 7 nm, while the PLA-CS-Fe3O4@EUG nanospheres diameter sizes range between 20 and 80 nm. These MAPLE-deposited coatings acted as bioactive nanosystems and exhibited a great antimicrobial effect by impairing the adherence and biofilm formation of Staphylococcus aureus (S. aureus) and Pseudomonas aeruginosa (P. aeruginosa) bacteria strains. Moreover, the obtained nano-coatings showed a good biocompatibility and facilitated the normal development of human endothelial cells. These nanosystems may be used as efficient alternatives in treating and preventing bacterial infections.
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Affiliation(s)
- Alina Maria Holban
- University of Bucharest, Faculty of Biology, Microbiology Department, Aleea Portocalelor no 1–3, 060101 Bucharest, Romania
| | - Valentina Grumezescu
- University Politehnica of Bucharest, Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide Materials and Nanomaterials, Polizu Street no 1–7, 011061 Bucharest, Romania
- National Institute for Lasers, Plasma & Radiation Physics, Lasers Department, P.O.Box MG-36, Bucharest-Magurele, Romania
| | - Alexandru Mihai Grumezescu
- University Politehnica of Bucharest, Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide Materials and Nanomaterials, Polizu Street no 1–7, 011061 Bucharest, Romania
| | - Bogdan Ştefan Vasile
- University Politehnica of Bucharest, Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide Materials and Nanomaterials, Polizu Street no 1–7, 011061 Bucharest, Romania
| | - Roxana Truşcă
- S.C. Metav-CD S.A., 31 Rosetti Str., 020015 Bucharest, Romania
| | - Rodica Cristescu
- National Institute for Lasers, Plasma & Radiation Physics, Lasers Department, P.O.Box MG-36, Bucharest-Magurele, Romania
| | - Gabriel Socol
- National Institute for Lasers, Plasma & Radiation Physics, Lasers Department, P.O.Box MG-36, Bucharest-Magurele, Romania
| | - Florin Iordache
- Flow Cytometry and Cell Therapy Laboratory, Institute of Cellular Biology and Pathology “Nicolae Simionescu” (ICBP), Bucharest, Romania
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Gao B, Fang L, Men J, Zhang Y. Preparation of grafted microspheres CPVA-g-PSSS and studies on their drug-carrying and colon-specific drug delivery properties. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:1300-6. [DOI: 10.1016/j.msec.2012.12.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2012] [Revised: 09/23/2012] [Accepted: 12/04/2012] [Indexed: 10/27/2022]
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PREPARATION OF GRAFTED MICROSPHERES CPVA- g-PSSS AND STUDIES ON THEIR CHARACTER OF DRUG CARRYING AND COLON-SPECIFIC DRUG DELIVERY FOR 5-FLUOROURACIL. ACTA POLYM SIN 2012. [DOI: 10.3724/sp.j.1105.2012.12003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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