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Ungureanu LB, Ghiciuc CM, Amalinei C, Ungureanu C, Petrovici CG, Stănescu RȘ. Antioxidants as Protection against Reactive Oxygen Stress Induced by Formaldehyde (FA) Exposure: A Systematic Review. Biomedicines 2024; 12:1820. [PMID: 39200284 PMCID: PMC11352058 DOI: 10.3390/biomedicines12081820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2024] [Revised: 08/01/2024] [Accepted: 08/09/2024] [Indexed: 09/02/2024] Open
Abstract
BACKGROUND AND OBJECTIVES Formaldehyde induces oxidative stress and is carcinogenic, particularly squamous cell carcinoma of the nasopharyngeal area. Around us, in exhaust gases, cigarette smoke, and various industrial products, FA primarily affects the respiratory tract and other organs like the cornea, liver, kidneys, brain, and cardiovascular system. This study aims to determine if antioxidants can mitigate FA's harmful effects. MATERIALS AND METHODS Several databases, including PubMed, Science Direct, Springer, and Wiley, were systematically searched. Research publications on antioxidants mitigating FA-induced oxidative damage were included, but reviews and articles lacking complete texts were excluded. SYRCLE's risk of bias tool for animal studies has been used. Tables were used for data synthesis. Out of 8790 articles, 35 publications detailing tissue homogenate for biochemical analysis, standard hematoxylin-eosin staining, and immunohistochemistry markers for histopathological and immunohistochemical diagnosis were selected. Most studies were case-control studies, utilizing rat or mouse models. Additionally, one cohort study on industrial workers was analyzed. CONCLUSIONS Antioxidants, including plant extracts, vitamins, and pigments, can prevent or heal FA-induced lesions. However, human studies, particularly biopsies, remain challenging, and animal trials are limited. Further research is needed to confirm FA's long-term effects and optimize antioxidant dosages.
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Affiliation(s)
- Loredana Beatrice Ungureanu
- Morphopathology, Department of Morpho-Functional Sciences I, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy, 16 Universitatii Street, 700115 Iasi, Romania; (L.B.U.); (C.U.)
| | - Cristina Mihaela Ghiciuc
- Pharmacology, Clinical Pharmacology and Algeziology, Department of Morpho-Functional Sciences II, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy, 16 Universitatii Street, 700115 Iasi, Romania
| | - Cornelia Amalinei
- Histology, Department of Morpho-Functional Sciences I, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy, 16 Universitatii Street, 700115 Iasi, Romania
| | - Carmen Ungureanu
- Morphopathology, Department of Morpho-Functional Sciences I, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy, 16 Universitatii Street, 700115 Iasi, Romania; (L.B.U.); (C.U.)
| | - Cristina Gabriela Petrovici
- Infectious Disease, Department of Medical II, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy, 16 Universitatii Street, 700115 Iasi, Romania;
| | - Raluca Ștefania Stănescu
- Biochemistry, Department of Morpho-Functional Sciences II, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy, 16 Universitatii Street, 700115 Iasi, Romania;
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Direct and Indirect Bactericidal Effects of Cold Atmospheric-Pressure Microplasma and Plasma Jet. Molecules 2021; 26:molecules26092523. [PMID: 33925959 PMCID: PMC8123442 DOI: 10.3390/molecules26092523] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 04/19/2021] [Accepted: 04/21/2021] [Indexed: 11/16/2022] Open
Abstract
The direct and indirect bactericidal effects of dielectric barrier discharge (DBD) cold atmospheric-pressure microplasma in an air and plasma jet generated in an argon-oxygen gas mixture was investigated on Staphylococcus aureus and Cutibacterium acnes. An AC power supply was used to generate plasma at relatively low discharge voltages (0.9-2.4 kV) and frequency (27-30 kHz). Cultured bacteria were cultivated at a serial dilution of 10-5, then exposed to direct microplasma treatment and indirect treatment through plasma-activated water (PAW). The obtained results revealed that these methods of bacterial inactivation showed a 2 and 1 log reduction in the number of survived CFU/mL with direct treatment being the most effective means of treatment at just 3 min using air. UV-Vis spectroscopy confirmed that an increase in treatment time at 1.2% O2, 98.8% Ar caused a decrease in O2 concentration in the water as well as a decrease in absorbance of the peaks at 210 nm, which are attributed NO2- and NO3- concentration in the water, termed denitratification and denitritification in the treated water, respectively.
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Akter M, Yadav DK, Ki SH, Choi EH, Han I. Inactivation of Infectious Bacteria Using Nonthermal Biocompatible Plasma Cabinet Sterilizer. Int J Mol Sci 2020; 21:ijms21218321. [PMID: 33171928 PMCID: PMC7664273 DOI: 10.3390/ijms21218321] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/30/2020] [Accepted: 10/30/2020] [Indexed: 11/29/2022] Open
Abstract
Nonthermal, biocompatible plasma (NBP) is a promising unique state of matter that is effective against a wide range of pathogenic microorganisms. This study focused on a sterilization method for bacteria that used the dielectric barrier discharge (DBD) biocompatible plasma cabinet sterilizer as an ozone generator. Reactive oxygen species play a key role in inactivation when air or other oxygen-containing gases are used. Compared with the untreated control, Escherichia coli(E. coli), Staphylococcus aureus (S. aureus), and Salmonella typhimurium (sepsis) were inhibited by approximately 99%, or were nondetectable following plasma treatment. Two kinds of plasma sterilizers containing six- or three-chamber cabinets were evaluated. There was no noticeable difference between the two configurations in the inactivation of microorganisms. Both cabinet configurations were shown to be able to reduce microbes dramatically, i.e., to the nondetectable range. Therefore, our data indicate that the biocompatible plasma cabinet sterilizer may prove to be an appropriate alternative sterilization procedure.
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Affiliation(s)
- Mahmuda Akter
- Department of Plasma Bio-Display, Kwangwoon University, Seoul 01897, Korea;
- Plasma Bioscience Research Center, Applied Plasma Medicine Center, Kwangwoon University, Seoul 01897, Korea;
| | - Dharmendra Kumar Yadav
- Department of Pharmacy, College of Pharmacy, Gachon University of Medicine and Science, Incheon City 21924, Korea;
| | - Se Hoon Ki
- Plasma Bioscience Research Center, Applied Plasma Medicine Center, Kwangwoon University, Seoul 01897, Korea;
- Department of Electronic and Biological Physics, Kwangwoon University, Seoul 01897, Korea
| | - Eun Ha Choi
- Department of Plasma Bio-Display, Kwangwoon University, Seoul 01897, Korea;
- Plasma Bioscience Research Center, Applied Plasma Medicine Center, Kwangwoon University, Seoul 01897, Korea;
- Department of Electronic and Biological Physics, Kwangwoon University, Seoul 01897, Korea
- Correspondence: (E.H.C.); (I.H.)
| | - Ihn Han
- Department of Plasma Bio-Display, Kwangwoon University, Seoul 01897, Korea;
- Plasma Bioscience Research Center, Applied Plasma Medicine Center, Kwangwoon University, Seoul 01897, Korea;
- Correspondence: (E.H.C.); (I.H.)
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4
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Navarro R, Rubio Hernández-Sampelayo A, Adem E, Marcos-Fernández A. Effect of electron beam irradiation on the properties of poly(tetramethylene oxide) and a poly(tetramethylene oxide)-based polyurethane. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.108905] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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5
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Al-Sabah A, Burnell SE, Simoes IN, Jessop Z, Badiei N, Blain E, Whitaker IS. Structural and mechanical characterization of crosslinked and sterilised nanocellulose-based hydrogels for cartilage tissue engineering. Carbohydr Polym 2019; 212:242-251. [DOI: 10.1016/j.carbpol.2019.02.057] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 02/01/2019] [Accepted: 02/16/2019] [Indexed: 11/30/2022]
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6
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In vitro evaluation of decontamination effects on mechanical properties of fibrin membrane. Med J Islam Repub Iran 2018; 32:2. [PMID: 29977870 PMCID: PMC6025911 DOI: 10.14196/mjiri.32.2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Indexed: 11/18/2022] Open
Abstract
Background: Tissue engineering has been investigated as a potential method for healing traumatized tissues. Biomaterials are material devices or implants used to repair or replace native body tissues and organs. The present study was conducted to evaluate the effects of decontamination methods on biological/mechanical properties and degradation/adhesion test of the platelet-rich fibrin (PRF) membranes to compare these properties with intact membranes as a biological biomaterial.
Methods: The in vitro degradation tests were conducted by placing the equal sizes of (i) intact PRF membrane, (ii) PRF membrane sterilized by autoclave (iii), ultraviolet (UV), and (iiii) gamma irradiation in phosphate buffer solution on a shaker. The degradation profiles were expressed. Adhesion test was performed by counting adhered mouse fibroblast and sterilized fibrin membrane was compared to normal fibrin membrane by different sterilization methods.
Results: The preliminary findings of sterilized PRF membranes showed that UV exposure (p<0.05) and autoclaved fibrin membranes (p<0.01) have significantly lower degradability compared to normal fibrin membranes. Gamma irradiation is similar to normal membrane in degradability. Cell adherence in all groups of fibrin membrane was significantly lower than the group without membrane, but there was no significant difference between intact and sterilized groups of fibrin membranes.
Conclusion: Sterilization of fibrin membrane with different protocols does not have any adverse effects on cell adhesion; however, cell adherence is naturally very weak even in normal membranes. Also, it seems that ultraviolet ray polymerizes fibrin filaments and merges them to each other and increases the ability of fibrin membrane against degradation. Autoclaved fibrin membrane content proteins are denatured because of pressure and heat and show an increase in hardness and stability against degradation.
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Tipnis NP, Burgess DJ. Sterilization of implantable polymer-based medical devices: A review. Int J Pharm 2017; 544:455-460. [PMID: 29274370 DOI: 10.1016/j.ijpharm.2017.12.003] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 11/29/2017] [Accepted: 12/02/2017] [Indexed: 02/03/2023]
Abstract
This review article is focused on the sterilization techniques used for polymer-based implantable medical devices as well as the regulatory aspects governing sterile medical devices. Polymeric materials are increasingly used in implantable devices due to their biodegradable and biocompatible nature. Patients and medical staff often prefer long-term implantable devices and these can be achieved using high molecular weight polymers. Sterilization of polymer-based implantable devices is critical. Since all implantable devices must be sterile, the effect of the sterilization method on the different device components (such as, the polymer, the drug, the electronics, etc.) has to be considered. A comprehensive summary of the established sterilization methods is provided along with the possible effects on polymers. In addition, novel sterilization methods are also discussed.
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Affiliation(s)
- Namita P Tipnis
- University of Connecticut, Department of Pharmaceutical Sciences, Storrs, CT 06269, United States
| | - Diane J Burgess
- University of Connecticut, Department of Pharmaceutical Sciences, Storrs, CT 06269, United States.
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Wo Y, Brisbois EJ, Wu J, Li Z, Major TC, Mohammed A, Wang X, Colletta A, Bull JL, Matzger AJ, Xi C, Bartlett RH, Meyerhoff ME. Reduction of Thrombosis and Bacterial Infection via Controlled Nitric Oxide (NO) Release from S-Nitroso- N-acetylpenicillamine (SNAP) Impregnated CarboSil Intravascular Catheters. ACS Biomater Sci Eng 2017; 3:349-359. [PMID: 28317023 PMCID: PMC5351555 DOI: 10.1021/acsbiomaterials.6b00622] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 01/21/2017] [Indexed: 01/15/2023]
Abstract
Nitric oxide (NO) has many important physiological functions, including its ability to inhibit platelet activation and serve as potent antimicrobial agent. The multiple roles of NO in vivo have led to great interest in the development of biomaterials that can deliver NO for specific biomedical applications. Herein, we report a simple solvent impregnation technique to incorporate a nontoxic NO donor, S-nitroso-N-acetylpenicillamine (SNAP), into a more biocompatible biomedical grade polymer, CarboSil 20 80A. The resulting polymer-crystal composite material yields a very stable, long-term NO release biomaterial. The SNAP impregnation process is carefully characterized and optimized, and it is shown that SNAP crystal formation occurs in the bulk of the polymer after solvent evaporation. LC-MS results demonstrate that more than 70% of NO release from this new composite material originates from the SNAP embedded CarboSil phase, and not from the SNAP species leaching out into the soaking solution. Catheters prepared with CarboSil and then impregnated with 15 wt % SNAP provide a controlled NO release over a 14 d period at physiologically relevant fluxes and are shown to significantly reduce long-term (14 day) bacterial biofilm formation against Staphylococcus epidermidis and Pseudonomas aeruginosa in a CDC bioreactor model. After 7 h of catheter implantation in the jugular veins of rabbit, the SNAP CarboSil catheters exhibit a 96% reduction in thrombus area (0.03 ± 0.01 cm2/catheter) compared to the controls (0.84 ± 0.19 cm2/catheter) (n = 3). These results suggest that SNAP impregnated CarboSil can become an attractive new biomaterial for use in preparing intravascular catheters and other implanted medical devices.
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Affiliation(s)
- Yaqi Wo
- Department
of Chemistry, Department of Surgery, University of Michigan Medical
Center, Department of Environmental Health Sciences, and Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Elizabeth J. Brisbois
- Department
of Chemistry, Department of Surgery, University of Michigan Medical
Center, Department of Environmental Health Sciences, and Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Jianfeng Wu
- Department
of Chemistry, Department of Surgery, University of Michigan Medical
Center, Department of Environmental Health Sciences, and Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Zi Li
- Department
of Chemistry, Department of Surgery, University of Michigan Medical
Center, Department of Environmental Health Sciences, and Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Terry C. Major
- Department
of Chemistry, Department of Surgery, University of Michigan Medical
Center, Department of Environmental Health Sciences, and Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Azmath Mohammed
- Department
of Chemistry, Department of Surgery, University of Michigan Medical
Center, Department of Environmental Health Sciences, and Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Xianglong Wang
- Department
of Chemistry, Department of Surgery, University of Michigan Medical
Center, Department of Environmental Health Sciences, and Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Alessandro Colletta
- Department
of Chemistry, Department of Surgery, University of Michigan Medical
Center, Department of Environmental Health Sciences, and Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Joseph L. Bull
- Department
of Chemistry, Department of Surgery, University of Michigan Medical
Center, Department of Environmental Health Sciences, and Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Adam J. Matzger
- Department
of Chemistry, Department of Surgery, University of Michigan Medical
Center, Department of Environmental Health Sciences, and Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Chuanwu Xi
- Department
of Chemistry, Department of Surgery, University of Michigan Medical
Center, Department of Environmental Health Sciences, and Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Robert H. Bartlett
- Department
of Chemistry, Department of Surgery, University of Michigan Medical
Center, Department of Environmental Health Sciences, and Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Mark E. Meyerhoff
- Department
of Chemistry, Department of Surgery, University of Michigan Medical
Center, Department of Environmental Health Sciences, and Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
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9
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Maiguy-Foinard A, Blanchemain N, Barthélémy C, Décaudin B, Odou P. Influence of a Double-Lumen Extension Tube on Drug Delivery: Examples of Isosorbide Dinitrate and Diazepam. PLoS One 2016; 11:e0154917. [PMID: 27153224 PMCID: PMC4859544 DOI: 10.1371/journal.pone.0154917] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 04/21/2016] [Indexed: 11/19/2022] Open
Abstract
Purpose Plastic materials such as polyurethane (PUR), polyethylene (PE), polypropylene (PP) and polyvinyl chloride (PVC) are widely used in double-lumen extension tubing. The purposes of our study were to 1) compare in vitro drug delivery through the double extension tubes available on the market 2) assess the plastic properties of PUR in infusion devices and their impact on drug delivery. Methods The study compared eight double-lumen extension tubes in PUR, co-extruded (PE/PVC) plastic and plasticised PVC from different manufacturers. Isosorbide dinitrate and diazepam were used as model compounds to evaluate their sorption on the internal surface of the infusion device. Control experiments were performed using norepinephrine known not to absorb to plastics. Drug concentrations delivered at the egress of extension tubes were determined over time by an analytical spectrophotometric UV-Vis method. The main characteristics of plastics were also determined. Results Significant differences in the sorption phenomenon were observed among the eight double-lumen extension tubes and between pairs of extension tubes. Mean concentrations of isosorbide dinitrate delivered at the egress of double-lumen extension tubes after a 150-minute infusion (mean values ± standard deviation in percentage of the initial concentrations in the prepared syringes) ranged between 80.53 ± 1.66 (one of the PUR tubes) and 92.84 ± 2.73 (PE/PVC tube). The same parameters measured during diazepam infusion ranged between 48.58 ± 2.88 (one of the PUR tubes) and 85.06 ± 3.94 (PE/PVC tube). The double-lumen extension tubes in PUR were either thermosetting (resin) or thermoplastic according to reference. Conclusions Clinicians must be aware of potential drug interactions with extension tube materials and so must consider their nature as well as the sterilisation method used before selecting an infusion device.
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Affiliation(s)
- Aurélie Maiguy-Foinard
- Univ. Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France
- CHU Lille, Institut de Pharmacie, F-59000 Lille, France
| | - Nicolas Blanchemain
- Univ. Lille, F-59000 Lille, France
- Inserm, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France
| | - Christine Barthélémy
- Univ. Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France
| | - Bertrand Décaudin
- Univ. Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France
- CHU Lille, Institut de Pharmacie, F-59000 Lille, France
- * E-mail:
| | - Pascal Odou
- Univ. Lille, EA 7365 - GRITA - Groupe de Recherche sur les formes Injectables et les Technologies Associées, F-59000 Lille, France
- CHU Lille, Institut de Pharmacie, F-59000 Lille, France
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10
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Wo Y, Li Z, Brisbois EJ, Colletta A, Wu J, Major T, Xi C, Bartlett RH, Matzger AJ, Meyerhoff ME. Origin of Long-Term Storage Stability and Nitric Oxide Release Behavior of CarboSil Polymer Doped with S-Nitroso-N-acetyl-D-penicillamine. ACS APPLIED MATERIALS & INTERFACES 2015; 7:22218-27. [PMID: 26393943 PMCID: PMC4613868 DOI: 10.1021/acsami.5b07501] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 09/22/2015] [Indexed: 05/20/2023]
Abstract
The prolonged and localized delivery of nitric oxide (NO), a potent antithrombotic and antimicrobial agent, has many potential biomedical applications. In this work, the origin of the long-term storage stability and sustained NO release mechanism of S-nitroso-N-acetyl-D-penicillamine (SNAP)-doped CarboSil 20 80A polymer, a biomedical thermoplastic silicone-polycarbonate-urethane, is explored. Long-term (22 days) localized NO release is achieved by utilizing a cross-linked silicone rubber as topcoats, which can greatly reduce the amount of SNAP, NAP, and NAP disulfide leaching from the SNAP-doped CarboSil films, as measured by LC-MS. Raman spectroscopy and powder X-ray diffraction characterization of SNAP-doped CarboSil films demonstrate that a polymer-crystal composite is formed during the solvent evaporation process when SNAP exceeds its solubility in CarboSil (ca. 3.4-4.0 wt %). Further, when exceeding this solubility threshold, SNAP exists in an orthorhombic crystal form within the bulk of the polymer. The proposed mechanism of sustained NO release in SNAP-doped CarboSil is that the solubilized SNAP in the polymer matrix decomposes and releases NO, primarily in the water-rich regions near the polymer/solution interface, and the dissolved SNAP in the bulk polymeric phase becomes unsaturated, resulting in the dissolution of crystalline SNAP within the bulk of the polymer. This is a very slow process that ultimately leads to NO release at the physiological flux levels for >3 weeks. The increased stability of SNAP within CarboSil is attributed to the intermolecular hydrogen bonds between the SNAP molecules that crystallize. This crystallization also plays a key role in maintaining RSNO stability within the CarboSil polymer for >8 months at 37 °C (88.5% remains). Further, intravascular catheters fabricated with this new material are demonstrated to significantly decrease the formation of Staphylococcus aureus biofilm (a leading cause of nosocomial bloodstream infections) (in vitro) over a 7 day period, with 5 log units reduction of viable cell count on catheter surfaces. It is also shown that the NO release catheters can greatly reduce thrombus formation on the catheter surfaces during 7 h implantation in rabbit veins, when compared to the control catheters fabricated without SNAP. These results suggest that the SNAP-doped CarboSil system is a very attractive new composite material for creating long-term NO release medical devices with increased stability and biocompatibility.
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Affiliation(s)
- Yaqi Wo
- Department
of Chemistry, Departmental of Surgery, University of Michigan Medical Center, and Department of
Environmental Health Sciences, University
of Michigan, Ann Arbor, Michigan 48109, United
States
| | - Zi Li
- Department
of Chemistry, Departmental of Surgery, University of Michigan Medical Center, and Department of
Environmental Health Sciences, University
of Michigan, Ann Arbor, Michigan 48109, United
States
| | - Elizabeth J. Brisbois
- Department
of Chemistry, Departmental of Surgery, University of Michigan Medical Center, and Department of
Environmental Health Sciences, University
of Michigan, Ann Arbor, Michigan 48109, United
States
| | - Alessandro Colletta
- Department
of Chemistry, Departmental of Surgery, University of Michigan Medical Center, and Department of
Environmental Health Sciences, University
of Michigan, Ann Arbor, Michigan 48109, United
States
| | - Jianfeng Wu
- Department
of Chemistry, Departmental of Surgery, University of Michigan Medical Center, and Department of
Environmental Health Sciences, University
of Michigan, Ann Arbor, Michigan 48109, United
States
| | - Terry
C. Major
- Department
of Chemistry, Departmental of Surgery, University of Michigan Medical Center, and Department of
Environmental Health Sciences, University
of Michigan, Ann Arbor, Michigan 48109, United
States
| | - Chuanwu Xi
- Department
of Chemistry, Departmental of Surgery, University of Michigan Medical Center, and Department of
Environmental Health Sciences, University
of Michigan, Ann Arbor, Michigan 48109, United
States
| | - Robert H. Bartlett
- Department
of Chemistry, Departmental of Surgery, University of Michigan Medical Center, and Department of
Environmental Health Sciences, University
of Michigan, Ann Arbor, Michigan 48109, United
States
| | - Adam J. Matzger
- Department
of Chemistry, Departmental of Surgery, University of Michigan Medical Center, and Department of
Environmental Health Sciences, University
of Michigan, Ann Arbor, Michigan 48109, United
States
| | - Mark E. Meyerhoff
- Department
of Chemistry, Departmental of Surgery, University of Michigan Medical Center, and Department of
Environmental Health Sciences, University
of Michigan, Ann Arbor, Michigan 48109, United
States
- E-mail: . Phone: (734) 763-5916
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11
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Miranda DG, Malmonge SM, Campos DM, Attik NG, Grosgogeat B, Gritsch K. A chitosan-hyaluronic acid hydrogel scaffold for periodontal tissue engineering. J Biomed Mater Res B Appl Biomater 2015; 104:1691-1702. [PMID: 26344054 DOI: 10.1002/jbm.b.33516] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Revised: 07/31/2015] [Accepted: 08/23/2015] [Indexed: 11/11/2022]
Abstract
The current challenge in treating periodontitis is regenerating the periodontium. This motivates tissue-engineering researchers to develop scaffolds as artificial matrices that give mechanical support for osteoblasts, cementoblasts, gingival and periodontal ligament fibroblast cells. In this study, modified hyaluronic acid (HA) and chitosan (CS) were employed to create a hybrid CS-HA hydrogel scaffold for periodontal regeneration. CS, HA, and CS-HA scaffolds were obtained by freeze-drying technique, resulting in porous structures suitable for use in tissue engineering. Scaffolds were submitted to gamma and UV-sterilization without significant morphology changes. The ATR-FTIR spectra of CS-HA hydrogels showed peaks at 377 cm-1 , 1566 cm-1 , and 1614 cm-1 , representing secondary amide, primary amine, and carboxyl acid respectively, and it was also observed the emergence of peaks at 886 cm-1 , which probably represents the Schiff base formed in the case of hybrid CS-HA hydrogels. The scaffolds presented a high rate of PBS uptake, reaching values higher than 95%. Thermal degradation of HA scaffolds was around 225°C and CS was around 285°C. The ATR-FTIR spectra and swelling degree were slightly disturbed mainly after gamma sterilization, but degradation temperature did not change after sterilization. The performance of the CS-HA hydrogel scaffolds for in vitro cell culture was tested using NIH3T3 and MG63 cell lines. The Alamar Blue test showed a significant increase in cellular viability and high CD44 expression, suggesting that the cells migrated more when seeded onto the scaffolds. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1691-1702, 2016.
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Affiliation(s)
- Diego G Miranda
- Laboratoire des Multimatériaux et Interfaces CNRS (UMR 5615), Université Lyon 1, Villeurbanne, France.,UFR d'Odontologie, Université Lyon 1, Lyon, France
| | - Sônia M Malmonge
- Center of Engineering, Modeling and Applied Social Sciences, Federal University of ABC, Santo André, Sao Paulo, Brazil.
| | - Doris M Campos
- Laboratoire des Multimatériaux et Interfaces CNRS (UMR 5615), Université Lyon 1, Villeurbanne, France
| | - Nina G Attik
- Laboratoire des Multimatériaux et Interfaces CNRS (UMR 5615), Université Lyon 1, Villeurbanne, France
| | - Brigitte Grosgogeat
- Laboratoire des Multimatériaux et Interfaces CNRS (UMR 5615), Université Lyon 1, Villeurbanne, France.,UFR d'Odontologie, Université Lyon 1, Lyon, France.,Service de Consultations et de Traitements Dentaires (U.F. Santé Publique), Hospices Civils de Lyon, Lyon, France
| | - Kerstin Gritsch
- Laboratoire des Multimatériaux et Interfaces CNRS (UMR 5615), Université Lyon 1, Villeurbanne, France.,UFR d'Odontologie, Université Lyon 1, Lyon, France.,Service de Consultations et de Traitements Dentaires (U.F. Parodontologie), Hospices Civils de Lyon, Lyon, France
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12
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Effect of dose and temperature on the physical properties of an aliphatic thermoplastic polyurethane irradiated with an electron beam. Radiat Phys Chem Oxf Engl 1993 2015. [DOI: 10.1016/j.radphyschem.2015.03.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Sterilisation of collagen materials using hydrogen peroxide doted supercritical carbon dioxide and its effects on the materials properties. J Supercrit Fluids 2015. [DOI: 10.1016/j.supflu.2015.04.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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14
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Zhang C, Jiang X, Zhao Z, Mao L, Zhang L, Coates P. Effects of wide-range γ-irradiation doses on the structures and properties of 4,4′-dicyclohexyl methane diisocyanate based poly(carbonate urethane)s. J Appl Polym Sci 2014. [DOI: 10.1002/app.41049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chen Zhang
- Key Laboratory of Beijing City for the Preparation and Processing of Novel Polymer Materials; Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
| | - Xiujuan Jiang
- Key Laboratory of Beijing City for the Preparation and Processing of Novel Polymer Materials; Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
| | - Zhiyang Zhao
- Key Laboratory of Beijing City for the Preparation and Processing of Novel Polymer Materials; Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
| | - Lixin Mao
- Key Laboratory of Beijing City for the Preparation and Processing of Novel Polymer Materials; Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
| | - Liqun Zhang
- Key Laboratory of Beijing City for the Preparation and Processing of Novel Polymer Materials; Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
| | - Phil Coates
- School of Engineering, Design, and Technology, Bradford University; BD7 1DP United Kingdom
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15
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Chang H, Ren KF, Zhang H, Wang JL, Wang BL, Ji J. The (PrS/HGF-pDNA) multilayer films for gene-eluting stent coating: Gene-protecting, anticoagulation, antibacterial properties, and in vivo antirestenosis evaluation. J Biomed Mater Res B Appl Biomater 2014; 103:430-9. [PMID: 24909849 DOI: 10.1002/jbm.b.33224] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 05/12/2014] [Accepted: 05/22/2014] [Indexed: 01/12/2023]
Abstract
Vascular gene-eluting stents (GES) is a promising strategy for treatment of cardiovascular disease. Very recently, we have proved that the (protamine sulfate/plasmid DNA encoding hepatocyte growth factor) (PrS/HGF-pDNA) multilayer can serve as a powerful tool for enhancing competitiveness of endothelial cell over smooth muscle cell, which opens perspectives for the regulation of intercellular competitiveness in the field of interventional therapy. However, before the gene multilayer films could be used in vascular stents for real clinical application, the preservation of gene bioactivity during the industrial sterilization and the hemocompatibility of film should be taken into account. Actually, both are long been ignored issues in the field of gene coating for GES. In this study, we demonstrate that the (PrS/HGF-pDNA) multilayer film exhibits the good gene-protecting abilities, which is confirmed by using the industrial sterilizations (gamma irradiation and ethylene oxide) and a routine storage condition (dry state at 4°C for 30 days). Furthermore, hemocompatible measurements (such as platelet adhesion and whole blood coagulation) and antibacterial assays (bacteria adhesion and growth inhibition) indicate the good anticoagulation and antibacterial properties of the (PrS/HGF-pDNA) multilayer film. The in vivo preliminary data of angiography and histological analysis suggest that the (PrS/HGF-pDNA) multilayer coated stent can reduce the in-stent restenosis. This work reveals that the (PrS/HGF-pDNA) multilayer film could be a promising candidate as coating for GES, which is of great potential in future clinic application.
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Affiliation(s)
- Hao Chang
- Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou, 310027, China
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16
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Oh J, Salcedo DE, Medriano CA, Kim S. Comparison of different disinfection processes in the effective removal of antibiotic-resistant bacteria and genes. J Environ Sci (China) 2014; 26:1238-1242. [PMID: 25079831 DOI: 10.1016/s1001-0742(13)60594-x] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This study compared three different disinfection processes (chlorination, E-beam, and ozone) and the efficacy of three oxidants (H2O2, S2O(-)8, and peroxymonosulfate (MPS)) in removing antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs) in a synthetic wastewater. More than 30 mg/L of chlorine was needed to remove over 90% of ARB and ARG. For the E-beam method, only 1 dose (kGy) was needed to remove ARB and ARG, and ozone could reduce ARB and ARG by more than 90% even at 3 mg/L ozone concentration. In the ozone process, CT values (concentration × time) were compared for ozone alone and combined with different catalysts based on the 2-log removal of ARB and ARG. Ozone treatment yielded a value of 31 and 33 (mg·min)/L for ARB and ARGs respectively. On the other hand, ozone with persulfate yielded 15.9 and 18.5 (mg·min)/L while ozone with monopersulfate yielded a value of 12 and 14.5 (mg·min)/L. This implies that the addition of these catalysts significantly reduces the contact time to achieve a 2-log removal, thus enhancing the process in terms of its kinetics.
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Affiliation(s)
- Junsik Oh
- Program in Environmental Technology and Policy, Korea University, 2511 Sejong-ro, Sejong 339-700, Korea
| | - Dennis Espineli Salcedo
- Program in Environmental Technology and Policy, Korea University, 2511 Sejong-ro, Sejong 339-700, Korea
| | - Carl Angelo Medriano
- Program in Environmental Technology and Policy, Korea University, 2511 Sejong-ro, Sejong 339-700, Korea
| | - Sungpyo Kim
- Program in Environmental Technology and Policy, Korea University, 2511 Sejong-ro, Sejong 339-700, Korea; Department of Environmental Engineering, College of Science and Technology, Korea University, 2511 Sejong-ro, Sejong 339-700, Korea.
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17
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Murray KA, Kennedy JE, McEvoy B, Vrain O, Ryan D, Cowman R, Higginbotham CL. Effects of temperature, packaging and electron beam irradiation processing conditions on the property behaviour of Poly (ether-block-amide) blends. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 39:380-94. [PMID: 24863239 DOI: 10.1016/j.msec.2014.03.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 02/06/2014] [Accepted: 03/07/2014] [Indexed: 10/25/2022]
Abstract
The radiation stability of Poly (ether-block-amide) (PEBA) blended with a multifunctional phenolic antioxidant and a hindered amide light stabiliser was examined under various temperatures, packaging and electron beam processing conditions. FTIR revealed that there were slight alterations to the PEBA before irradiation; however, these became more pronounced following irradiation. The effect of varying the temperature, packaging and processing conditions on the resultant PEBA properties was apparent. For example, rheology demonstrated that the structural properties could be enhanced by manipulating the aforementioned criteria. Mechanical testing exhibited less radiation resistance when the PEBA samples were vacuum packed and exposed to irradiation. MFI and AFM confirmed that the melting strength and surface topography could be reduced/increased depending on the conditions employed. From this study it was concluded that virgin PEBA submerged in dry ice with non-vacuum packaging during the irradiation process, provided excellent radiation resistance (20.9% improvement) in contrast to the traditional method.
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Affiliation(s)
- Kieran A Murray
- Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Co. Westmeath, Ireland.
| | - James E Kennedy
- Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Co. Westmeath, Ireland.
| | - Brian McEvoy
- Synergy Health, IDA Business & Technology Park, Sragh, Tullamore, Co. Offaly, Ireland.
| | - Olivier Vrain
- Synergy Health, IDA Business & Technology Park, Sragh, Tullamore, Co. Offaly, Ireland.
| | - Damien Ryan
- Synergy Health, IDA Business & Technology Park, Sragh, Tullamore, Co. Offaly, Ireland.
| | - Richard Cowman
- Synergy Health, IDA Business & Technology Park, Sragh, Tullamore, Co. Offaly, Ireland.
| | - Clement L Higginbotham
- Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Co. Westmeath, Ireland.
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18
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Khan W, Muntimadugu E, Jaffe M, Domb AJ. Implantable Medical Devices. ADVANCES IN DELIVERY SCIENCE AND TECHNOLOGY 2014. [DOI: 10.1007/978-1-4614-9434-8_2] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/06/2022]
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19
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Structural changes of skin and amnion grafts for transplantation purposes following different doses of irradiation. Cell Tissue Bank 2013; 15:429-33. [DOI: 10.1007/s10561-013-9407-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 11/09/2013] [Indexed: 11/26/2022]
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20
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The influence of electron beam irradiation conducted in air on the thermal, chemical, structural and surface properties of medical grade polyurethane. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2013.03.034] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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21
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George KA, Shadforth AM, Chirila TV, Laurent MJ, Stephenson SA, Edwards GA, Madden PW, Hutmacher DW, Harkin DG. Effect of the sterilization method on the properties of Bombyx mori silk fibroin films. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:668-74. [DOI: 10.1016/j.msec.2012.10.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 10/05/2012] [Accepted: 10/26/2012] [Indexed: 10/27/2022]
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22
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Klämpfl TG, Isbary G, Shimizu T, Li YF, Zimmermann JL, Stolz W, Schlegel J, Morfill GE, Schmidt HU. Cold atmospheric air plasma sterilization against spores and other microorganisms of clinical interest. Appl Environ Microbiol 2012; 78:5077-82. [PMID: 22582068 PMCID: PMC3416436 DOI: 10.1128/aem.00583-12] [Citation(s) in RCA: 177] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Accepted: 05/03/2012] [Indexed: 01/24/2023] Open
Abstract
Physical cold atmospheric surface microdischarge (SMD) plasma operating in ambient air has promising properties for the sterilization of sensitive medical devices where conventional methods are not applicable. Furthermore, SMD plasma could revolutionize the field of disinfection at health care facilities. The antimicrobial effects on Gram-negative and Gram-positive bacteria of clinical relevance, as well as the fungus Candida albicans, were tested. Thirty seconds of plasma treatment led to a 4 to 6 log(10) CFU reduction on agar plates. C. albicans was the hardest to inactivate. The sterilizing effect on standard bioindicators (bacterial endospores) was evaluated on dry test specimens that were wrapped in Tyvek coupons. The experimental D(23)(°)(C) values for Bacillus subtilis, Bacillus pumilus, Bacillus atrophaeus, and Geobacillus stearothermophilus were determined as 0.3 min, 0.5 min, 0.6 min, and 0.9 min, respectively. These decimal reduction times (D values) are distinctly lower than D values obtained with other reference methods. Importantly, the high inactivation rate was independent of the material of the test specimen. Possible inactivation mechanisms for relevant microorganisms are briefly discussed, emphasizing the important role of neutral reactive plasma species and pointing to recent diagnostic methods that will contribute to a better understanding of the strong biocidal effect of SMD air plasma.
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Affiliation(s)
- Tobias G Klämpfl
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany.
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23
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Lambert BJ, Mendelson TA, Craven MD. Radiation and ethylene oxide terminal sterilization experiences with drug eluting stent products. AAPS PharmSciTech 2011; 12:1116-26. [PMID: 21887604 DOI: 10.1208/s12249-011-9644-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Accepted: 06/10/2011] [Indexed: 11/30/2022] Open
Abstract
Radiation and ethylene oxide terminal sterilization are the two most frequently used processes in the medical device industry to render product within the final sterile barrier package free from viable microorganisms. They are efficacious, safe, and efficient approaches to the manufacture of sterile product. Terminal sterilization is routinely applied to a wide variety of commodity healthcare products (drapes, gowns, etc.) and implantable medical devices (bare metal stents, heart valves, vessel closure devices, etc.) along with products used during implantation procedures (catheters, guidewires, etc.). Terminal sterilization is also routinely used for processing combination products where devices, drugs, and/or biologics are combined on a single product. High patient safety, robust standards, routine process controls, and low-cost manufacturing are appealing aspects of terminal sterilization. As the field of combination products continues to expand and evolve, opportunity exists to expand the application of terminal sterilization to new combination products. Material compatibility challenges must be overcome to realize these opportunities. This article introduces the reader to terminal sterilization concepts, technologies, and the related standards that span different industries (pharmaceutical, medical device, biopharmaceuticals, etc.) and provides guidance on the application of these technologies. Guidance and examples of the application of terminal sterilization are discussed using experiences with drug eluting stents and bioresorbable vascular restoration devices. The examples provide insight into selecting the sterilization method, developing the process around it, and finally qualifying/validating the product in preparation for regulatory approval and commercialization. Future activities, including new sterilization technologies, are briefly discussed.
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24
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Shih CC, Su YY, Chen LC, Shih CM, Lin SJ. Degradation of 316L stainless steel sternal wire by steam sterilization. Acta Biomater 2010; 6:2322-8. [PMID: 20025998 DOI: 10.1016/j.actbio.2009.12.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Revised: 12/07/2009] [Accepted: 12/10/2009] [Indexed: 10/20/2022]
Abstract
Sterilization is an important step prior to the implantation of medical devices inside the human body. In this work we studied the influence of steam sterilization cycles on the oxide film properties of stainless steel sternal wire. Characterization techniques such as open- circuit potential, potentiodynamic measurement, electrochemical impedance spectroscopy, cathodic stripping, transmission electron microscopy, atomic force microscopy and scanning electron microscopy were employed to investigate the cycles of steam sterilization on the corrosion behavior of sternal wire. The results showed that the oxide properties are a function of the number of steam sterilization cycles and deteriorate as the number of cycles increases. Steam sterilization might damage the implant integrity and heavy metals could be released to the surrounding tissues due to deterioration of the oxide film.
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Abstract
Ethylene oxide (EO) gas is commonly used to sterilize medical devices. A major concern is the amount of residue that may remain on or in the device and be available in the body. Some standards (ASTMF619 and ISO 10993-12) recommend using two different extraction solutions (one polar, one nonpolar), for sample preparation prior to testing medical devices. However, ISO 10993-7 recommends water to process medical devices to determine EO residual levels. To address this, EO residual levels were examined in different extraction solutions. EO residual levels from devices and materials extracted with different solutions were evaluated. Results from this study indicate little difference between extraction solutions of water, cell culture media, and serum (less than 30% difference). Given the increased cost and increased background noise of media or serum over water, using only water to process medical devices and materials for EO residues appears adequate.
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Affiliation(s)
- Anne D Lucas
- Center for Device and Radiological Health, U.S. Food and Drug Administration, Silver Spring, MD 20903, USA.
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26
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Haugen HJ, Brunner M, Pellkofer F, Aigner J, Will J, Wintermantel E. Effect of different gamma-irradiation doses on cytotoxicity and material properties of porous polyether-urethane polymer. J Biomed Mater Res B Appl Biomater 2007; 80:415-23. [PMID: 16850461 DOI: 10.1002/jbm.b.30612] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Biomaterials respond to sterilization methods differently. Steam sterilization might decrease the performance of thermoplastic polyether-urethane (TPU); however, the effect of different gamma-radiation doses on this polymer is contradictory in present literature. The purpose of this study was to investigate the differences between irradiative doses in comparison with steam sterilization on a porous TPU scaffold produced by a new processing method. No significant differences in the surface chemical structure were found with attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) analysis when comparing with the sterilization methods. The molecular weight (M(w)) had a net increase from 11.5 +/- 0.039 to 13.2 +/- 0.072 kDa by gamma-sterilization from 10 to 60 kGy. The samples that were irradiated (>60 kGy) had also an increase in polydispersity index (PDI; 1.45 +/- 0.007) in comparison with the nonsterile ones (1.31 +/- 0.017), which indicate branching. Liquid chromatography/mass spectroscopy (LC/MS) analysis showed that there was a correlation between the concentration of the breakdown product, methyl dianiline, and cytotoxicity. The concentration of this compound was found to be four times higher in steam-sterilized sample (1.3 +/- 0.01 ppb) compared with that of the polymer sample gamma-sterilized at 10 kGy (0.3 +/- 0.01 ppb). The cytotoxicity of TPU was found to decrease with higher radiation doses, and was significantly higher for the steam-sterilized samples. It is recommended that TPU produced with the described foaming method should be sterilized by gamma-irradiation at 25 kGy or higher doses.
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Affiliation(s)
- H J Haugen
- Department of Biomaterials, Institute for Clinical Dentistry, University of Oslo, PO Box 1109 Blindern, NO-0317 Oslo, Norway.
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Hemmer JD, Drews MJ, LaBerge M, Matthews MA. Sterilization of bacterial spores by using supercritical carbon dioxide and hydrogen peroxide. J Biomed Mater Res B Appl Biomater 2007; 80:511-8. [PMID: 16838346 DOI: 10.1002/jbm.b.30625] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
It was hypothesized that supercritical carbon dioxide (SC-CO(2)) treatment could serve as an alternative sterilization method at various temperatures (40-105 degrees C), CO(2) pressures (200-680 atm), and treatment times (25 min to 6 h), and with or without the use of a passive additive (distilled water, dH(2)O) or an active additive (hydrogen peroxide, H(2)O(2)). While previous researchers have shown that SC-CO(2) possesses antimicrobial properties, sterilization effectiveness has not been shown at sufficiently low treatment temperatures and cycle times, using resistant bacterial spores. Experiments were conducted using Geobacillus stearothermophilus and Bacillus atrophaeus spores. Spore strips were exposed to SC-CO(2) in commercially available supercritical fluid extraction and reaction systems, at varying temperatures, pressures, treatment times, and with or without the use of a passive additive, such as dH(2)O, or an active additive, such as H(2)O(2). Treatment parameters were varied from 40 to 105 degrees C, 200-680 atm, and from 25 min to 6 h. At 105 degrees C without H(2)O(2), both spore types were completely deactivated at 300 atm in 25 min, a shorter treatment cycle than is obtained with methods in use today. On the other hand, with added H(2)O(2) (<100 ppm), 6 log populations of both spore types were completely deactivated using SC-CO(2) in 1 h at 40 degrees C. It was concluded from the data that large populations of resistant bacterial spores can be deactivated with SC-CO(2) with added H(2)O(2)at lower temperatures and potentially shorter treatment cycles than in most sterilization methods in use today.
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Affiliation(s)
- Jason D Hemmer
- Department of Bioengineering, Clemson University, Clemson, South Carolina 29634, USA
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28
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An YH, Alvi FI, Kang Q, Laberge M, Drews MJ, Zhang J, Matthews MA, Arciola CR. Effects of sterilization on implant mechanical property and biocompatibility. Int J Artif Organs 2006; 28:1126-37. [PMID: 16353119 DOI: 10.1177/039139880502801110] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This article concisely reviews the effects of sterilization on the mechanical properties and surface chemistries of implantable biomaterials. This article also summarizes the biological effects of the sterilization-related changes in the implant. Because there are so many different types of implant materials currently in use (including metals, polymers, and diverse biological materials), the response of tissue to these different materials varies dramatically. This review further discusses the effects of sterilization on in vivo and in vitro tissue response specifically to implantable metals and polyethylene, with the possibility of future biocompatibility testing of the implants sterilized with supercritical phase carbon dioxide sterilization.
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Affiliation(s)
- Y H An
- Orthopedic Research Laboratory, Medical University of South Carolina, Charleston, SC 29425, USA.
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Oliveira AL, Mano JF, Román JS, Reis RL. Study of the influence of β-radiation on the properties and mineralization of different starch-based biomaterials. J Biomed Mater Res B Appl Biomater 2005; 74:560-9. [PMID: 15906388 DOI: 10.1002/jbm.b.30260] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In this work, the effects of beta-radiation are assessed, for the first time, on starch-based biodegradable polymers, with the aim of using it as an alternative sterilization process to the previously studied sterilization methods. Different doses of radiation were used in order to investigate the possibility of using this sterilization technique as a treatment to tailor the surface and bulk properties (namely mechanical) of these polymers. The as-treated substrates were characterized by water-uptake measurements and contact angle (theta) measurements. The mechanical properties of the materials were characterized by tensile tests by means of ultimate tensile strength (UTS) and strain at break (epsilon). The fracture of the surfaces was observed by scanning electron microscopy (SEM). Dynamic mechanical analysis (DMA) was also used to characterize the viscolelastic behavior of the irradiated materials. The main effect of sterilization with beta-radiation over the starch-based polymers seems to be a surface modification by an increase of the hydrophilicity. Nevertheless, because beta-radiation did not significantly affect the mechanical properties, it can be regarded as an effective way of modifying the surface for applications were more hydrophilic surfaces are desirable.
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Affiliation(s)
- A L Oliveira
- 3B's Research Group - Biomaterials, Biodegradables & Biomimetics, University of Minho, Campus de Gualtar, Braga, Portugal.
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Abstract
Gamma irradiation sterilization (gamma-irradiation) fragments and denatures collagen, drastically decreasing critical physical properties. Our goal was to maintain strength and stability of gamma-irradiated collagen by adding glucose, which in theory can initiate crosslink formation in collagen during exposure to gamma-irradiation. Collagen films prepared with and without glucose were gamma-irradiated with a standard dose of 2.5 Mrad. Relative amounts of crosslinking and denaturation were approximated based on solubility and the mechanical properties of the films after hydration, heat denaturation, or incubation in enzymes (collagenase and trypsin). After exposure to gamma-irradiation, collagen films containing glucose had significantly higher mechanical properties, greater resistance to enzymatic degradation, and decreased solubility compared with control films. The entire experiment was repeated with a second set of films that were exposed first to ultraviolet irradiation (254 nm) to provide higher initial strength and then gamma-irradiated. Again, films containing glucose had significantly greater mechanical properties and resistance to enzymatic degradation compared with controls. Gel electrophoresis showed that glucose did not prevent peptide fragmentation; therefore, the higher strength and stability in glucose-incorporated films may be due to glucose-derived crosslinks. The results of this study suggest that glucose may be a useful additive to stabilize collagenous materials or tissues sterilized by gamma-irradiation.
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Affiliation(s)
- Mark P Ohan
- Orthopaedic Research Laboratories, Department of Orthopaedic Surgery, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, New Brunswick, New Jersey 08903, USA
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31
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Gorna K, Gogolewski S. Molecular stability, mechanical properties, surface characteristics and sterility of biodegradable polyurethanes treated with low-temperature plasma. Polym Degrad Stab 2003. [DOI: 10.1016/s0141-3910(02)00363-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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32
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Granja PL, Pouységu L, Pétraud M, De Jéso B, Baquey C, Barbosa MA. Cellulose phosphates as biomaterials. I. Synthesis and characterization of highly phosphorylated cellulose gels. J Appl Polym Sci 2001. [DOI: 10.1002/app.2193] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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33
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Granja PL, Pouységu L, Deffieux D, Daudé G, De Jéso B, Labrugère C, Baquey C, Barbosa MA. Cellulose phosphates as biomaterials. II. Surface chemical modification of regenerated cellulose hydrogels. J Appl Polym Sci 2001. [DOI: 10.1002/app.2194] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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34
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Gogolewski S, Mainil-Varlet P, Dillon JG. Sterility, mechanical properties, and molecular stability of polylactide internal-fixation devices treated with low-temperature plasmas. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 1996; 32:227-35. [PMID: 8884500 DOI: 10.1002/(sici)1097-4636(199610)32:2<227::aid-jbm12>3.0.co;2-g] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The effect of low-temperature plasma on sterility, molecular, mechanical, and crystalline properties of poly (L-lactide), poly (L/D-lactide) and poly (L/DL-lactide) was investigated. Polymers were treated for 15 and 30 min at 100 W with nitrogen, argon, oxygen, and carbon dioxide plasma. All polymers treated with oxygen or carbon dioxide plasma were rendered sterile after 15 min of treatment. Only 70% of the samples treated under similar conditions with nitrogen or argon plasma were sterile. Extension of the exposure time to 30 min and increasing power to 200 W did not improve sterilization efficiency. Plasma sterilization, under the conditions used, caused no significant decrease or increase in overall molecular weight or polydispersity of the polylactides used. In most instances the effect of plasma sterilization was to slightly increase the overall molecular weight of the polymers studied. Treatment with argon plasma led to a more consistent increase in molecular weight than did treatment with nitrogen, oxygen, or carbon dioxide. Analysis of the surface (skin) of a poly(L-lactide) injection-molded rod following plasma sterilization indicated an increase in molecular weight as related to the interior (core) of the rod. Comparison of Mark-Houwink plots for the surface and interior of poly(L-lactide) injection-molded rods following plasma sterilization indicated an increase in chain branching for the surface relative to the interior of the rod. Generally the highly crystalline poly(L-lactide) was less susceptible to change upon plasma treatment than was the less crystalline poly(L/D-lactide) and poly(L/DL-lactide). The mechanical properties (shear strength, bending strength, and moduli) of the polylactides were not affected by plasma treatment. The overall melting temperature and the heat of melting of polylactides studied were not affected by plasma treatment. The melting temperature of the skin of the samples was about 1 degree C higher than the melting temperature of the core due to the chain orientation upon injection-molding. Plasma treatment of the polylactides reduced the melting temperature of the skin by 3 degrees C to 5 degrees C due to the crosslinking or branching at the surface layer.
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Premnath V, Harris WH, Jasty M, Merrill EW. Gamma sterilization of UHMWPE articular implants: an analysis of the oxidation problem. Ultra High Molecular Weight Poly Ethylene. Biomaterials 1996; 17:1741-53. [PMID: 8879511 DOI: 10.1016/0142-9612(95)00349-5] [Citation(s) in RCA: 305] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Gamma irradiation of Ultrahigh Molecular Weight Polyethylene (UHMWPE) leads to long-lived free radicals which react with oxygen. Diffusion of oxygen, occurring over months or years, controlled by the permeability characteristics of the polymer, results in progressive oxidation, breaking of polymer chains, alteration of the crystalline portion of the polymer, and deterioration of the mechanical properties of the polymer. This paper reviews the observations in the literature on this issue and then presents a conceptual model concerning the interplay of radical diffusion, oxygen diffusion, non-uniform permeability, and free-radically driven chain reactions in order to explain these observations. The suggested model is based on literature that is available on the oxidation of linear polyethylenes during and after irradiation. The model directs the attention of researchers in the field of orthopaedic implants to the complexity of the process and the variety of issues and parameters to be considered while studying the long-term effects of radiation sterilization on UHMWPE.
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Affiliation(s)
- V Premnath
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge 02139, USA
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Abstract
The use of microwave plasmas for dry sterilization has been investigated. The dry-sterilization process is a process similar to plasma etching. Bacteria and viruses can be killed by chemical reactions which disintegrate their bodies and remove them from the surface to be sterilized. The removal of bacteria or viruses from material surfaces is caused by the reaction of activated oxygen species in the plasma with hydrocarbon bonds of the cell wall of the bacteria or the capsid of the viruses. Preliminary experiments indicate that the low-temperature dry sterilization method is easy to use, requires much less time than other methods for sterilization, and is also non-toxic. It is feasible for use in the field of sterilization in dental and medical clinics.
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Affiliation(s)
- T T Chau
- Department of Electrical and Computer Engineering, University of Manitoba, Winnipeg, Canada
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Dang MH, Birchler F, Ruffieux K, Wintermantel E. Toxicity screening of biodegradable polymers. I. Selection and evaluation of cell culture test methods. ACTA ACUST UNITED AC 1996. [DOI: 10.1007/bf02067453] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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