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Chimene D, Queener KMK, Ko BS, McShane M, Daniele M. Insertable Biosensors: Combining Implanted Sensing Materials with Wearable Monitors. Annu Rev Biomed Eng 2024; 26:197-221. [PMID: 38346276 DOI: 10.1146/annurev-bioeng-110222-101045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/05/2024]
Abstract
Insertable biosensor systems are medical diagnostic devices with two primary components: an implantable biosensor within the body and a wearable monitor that can remotely interrogate the biosensor from outside the body. Because the biosensor does not require a physical connection to the electronic monitor, insertable biosensor systems promise improved patient comfort, reduced inflammation and infection risk, and extended operational lifetimes relative to established percutaneous biosensor systems. However, the lack of physical connection also presents technical challenges that have necessitated new innovations in developing sensing chemistries, transduction methods, and communication modalities. In this review, we discuss the key developments that have made insertables a promising option for longitudinal biometric monitoring and highlight the essential needs and existing development challenges to realizing the next generation of insertables for extended-use diagnostic and prognostic devices.
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Affiliation(s)
- David Chimene
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, USA;
| | - Kirstie M K Queener
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina, USA
| | - Brian S Ko
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, USA;
| | - Mike McShane
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, USA;
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas, USA
| | - Michael Daniele
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina, USA
- Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina, USA;
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2
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Bhandari SS, Palin W, Kuehne SA, Camilleri J. Investigating best practice for specimen preparation for biological testing of root canal sealers. Dent Mater 2024; 40:387-392. [PMID: 38103958 DOI: 10.1016/j.dental.2023.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 11/30/2023] [Accepted: 12/08/2023] [Indexed: 12/19/2023]
Abstract
INTRODUCTION Biological characterization of root canal sealers is important as it assesses the ability of the root canal sealer to exert antimicrobial properties thus avoiding treatment failures caused by microbial challenge and also assess the cytotoxic effect on the periapical tissues. Assessment of the biological testing of root canal sealers necessitates the sterilisation of the materials prior to evaluation. This study aims to analyse the influence of various sterilisation techniques conducted prior to biological testing on the microstructure and surface properties of endodontic sealers. Assessment of the initial microbial contamination on the material was also undertaken. METHODS Four commercial sealers were investigated. The sealers were either prepared in a laminar flow cabinet or on a laboratory bench top under ambient conditions. Each group was further divided into 5 groups (n = 3) based on the sterilization technique:1) ethanol-10 mins, 2) ultraviolet-1 h, 3) ethanol-10 mins + ultraviolet-1 h, 4) autoclave, and 5) no sterilisation (control). Microbial levels in the materials were assessed by plate streaking technique. The materials were characterized by scanning electron microscopy and energy dispersive spectroscopy, and Fourier transform infrared spectroscopy, before and after sterilisation, to assess any changes in microstructure and chemical composition. RESULTS All the materials did not exhibit contamination when prepared in laminar flow chamber in sterile conditions compared with sealers prepared on the bench top. Three of the commercial materials showed changes in microstructure while one (TotalFill) was not affected by the sterilisation. AH Plus and BioRoot RCS exhibited alterations in water and alcohol peaks in FT-IR while the single syringe sealers (TotalFill and BioRoot Flow) showed no changes. CONCLUSIONS Sterilisation methods cause physical and chemical alterations to sealers. Material preparation should be performed in a laminar flow cabinet and a test for sterility should be performed prior to any biological testing being undertaken. If the materials are not sterile, assessment of the effects of the sterilization methods is recommended.
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Affiliation(s)
- Sweta Surana Bhandari
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - William Palin
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Sarah A Kuehne
- Nottingham Trent University, School of Science and Technology, Nottingham, United Kingdom
| | - Josette Camilleri
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom.
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3
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Ramachandran B, Sabbatier G, Bowden OM, Campbell K, Fekete N, Girard-Lauriault PL, Hoesli CA. Human mesenchymal stromal cell adhesion and expansion on fluoropolymer surfaces modified with oxygen and nitrogen-rich plasma polymers. Colloids Surf B Biointerfaces 2024; 234:113740. [PMID: 38199188 DOI: 10.1016/j.colsurfb.2023.113740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 12/12/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024]
Abstract
Fluorinated ethylene propylene (FEP) vessels are of significant interest for therapeutic cell biomanufacturing applications due to their chemical inertness, hydrophobic surface, and high oxygen permeability. However, these properties also limit the adhesion and survival of anchorage-dependent cells. Here, we develop novel plasma polymer coatings to modify FEP surfaces, enhancing the adhesion and expansion of human mesenchymal stromal cells (hMSCs). Similar to commercially available tissue culture polystyrene vessels, oxygen-rich or nitrogen-rich surface chemistries can be achieved using this approach. While steam sterilization increased the roughness of the coatings and altered the surface chemistry, the overall wettability and oxygen or nitrogen-rich nature of the coatings were maintained. In the absence of proteins during initial cell attachment, cells adhered to surfaces even in the presence of chelators, whereas adhesion was abrogated with chelator in a protein-containing medium, suggesting that integrin-mediated adhesion predominates over physicochemical tethering in normal protein-containing cell seeding conditions. Albumin adsorption was more elevated on nitrogen-rich coatings compared to the oxygen-rich coatings, which was correlated with a higher extent of hMSC expansion after 3 days. Both the oxygen and nitrogen-rich coatings significantly improved hMSC adhesion and expansion compared to untreated FEP. FEP surfaces with nitrogen-rich coatings were practically equivalent to commercially available standard tissue culture-treated polystyrene surfaces in terms of hMSC yields. Plasma polymer coatings show significant promise in expanding the potential usage of FEP-based culture vessels for cell therapy applications.
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Affiliation(s)
| | - Gad Sabbatier
- Department of Chemical Engineering, McGill University, Montréal, Canada
| | - Olivia M Bowden
- Department of Chemical Engineering, McGill University, Montréal, Canada
| | - Katie Campbell
- Saint-Gobain Ceramics & Plastics, Inc., Northboro R&D Center, Northborough, MA, USA
| | - Natalie Fekete
- Saint-Gobain Ceramics & Plastics, Inc., Northboro R&D Center, Northborough, MA, USA
| | | | - Corinne A Hoesli
- Department of Chemical Engineering, McGill University, Montréal, Canada.
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Ghaffari S, Amiri N, Felix DF, Abbasidezfouli S, Franco F, Beaupré SL, Branda NR, Lange D. Surface photosterilization of implantable silicone biomaterials: structural and functional characterization. Colloids Surf B Biointerfaces 2024; 233:113637. [PMID: 37979481 DOI: 10.1016/j.colsurfb.2023.113637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 10/16/2023] [Accepted: 11/06/2023] [Indexed: 11/20/2023]
Abstract
Hospital-acquired infections (HAIs) remain one of the major challenges faced by the global healthcare system. The increasing rate of pathogenic resistance against antibiotics suggests that alternative treatments are needed to control recurrent infections. Catheter-associated urinary tract infections (CAUTIs) are the third most common type of HAI worldwide, and this is mainly due to indwelling devices being excellent substrates for bacterial adhesion and growth. Subsequent biofilm formation on the implant surface acts as a constant nidus of bacteria and infection, thereby contributing to increased rates of patient morbidity and mortality. Here, we propose a simple and cost-effective method to sterilize silicone-based implant surfaces and prevent initial bacterial colonization, using Polydimethylsiloxane (PDMS) and an embedded ruthenium photosensitizer (PS). Exposure to LED light triggers potent photokilling action, resulting in significant bactericidal activity as evidenced by the number of adherent bacteria being below the level of detection (<10 CFU/mL) after 24 h. Live/dead staining studies using fluorescence microscopy indicated significant reduction in surface-adhered bacterial growth and biofilm formation. This potent antibacterial activity was verified in vivo, with exposure of contaminated PDMS coupons containing PS to LED prior to implantation resulting in over 99.5% reduction in adherent bacteria compared to controls over the 3-day implantation period. Histological analysis of the implantation site of PDMS+PS samples, in the absence of bacteria, revealed no adverse reactions. This was also confirmed using in vitro cytotoxicity studies. Tensile strength, surface roughness, hydrophobicity, and the development of encrustation of surface-treated groups exhibit comparable or improved properties to bare PDMS.
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Affiliation(s)
- Sahand Ghaffari
- The Stone Centre at VGH, Department of Urologic Sciences, University of British Columbia, Jack Bell Research Centre, 550-3, 2660 Oak Street, Vancouver V6H 3Z6, BC, Canada.
| | - Nafise Amiri
- ICORD and Department of Pathology and Laboratory Medicine, University of British Columbia, 818 W10th Ave, Vancouver V5Z 1M9, Canada.
| | - Demian F Felix
- The Stone Centre at VGH, Department of Urologic Sciences, University of British Columbia, Jack Bell Research Centre, 550-3, 2660 Oak Street, Vancouver V6H 3Z6, BC, Canada.
| | - Samin Abbasidezfouli
- The Stone Centre at VGH, Department of Urologic Sciences, University of British Columbia, Jack Bell Research Centre, 550-3, 2660 Oak Street, Vancouver V6H 3Z6, BC, Canada.
| | - Fernanda Franco
- 4D LABS and Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada.
| | - Scott L Beaupré
- Department of Physics, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada.
| | - Neil R Branda
- 4D LABS and Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada.
| | - Dirk Lange
- The Stone Centre at VGH, Department of Urologic Sciences, University of British Columbia, Jack Bell Research Centre, 550-3, 2660 Oak Street, Vancouver V6H 3Z6, BC, Canada.
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Lau LN, Cho JH, Jo YH, Yeo ISL. Biological effects of gamma-ray sterilization on 3 mol% yttria-stabilized tetragonal zirconia polycrystal: An in vitro study. J Prosthet Dent 2023; 130:936.e1-936.e9. [PMID: 37802736 DOI: 10.1016/j.prosdent.2023.09.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 09/13/2023] [Accepted: 09/14/2023] [Indexed: 10/08/2023]
Abstract
STATEMENT OF PROBLEM Selecting the sterilization method is important because sterilization can alter the surface chemistry of implant materials, including zirconia, and influence their cellular biocompatibility. Studies on the biological effects of sterilization on implant materials are lacking. PURPOSE The purpose of this in vitro study was to evaluate the biocompatibility of gamma-ray irradiated 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) compared with unirradiated titanium, 3Y-TZP, and pure gold. MATERIAL AND METHODS Disk-shaped specimens each of commercially pure grade 4 titanium, 3Y-TZP, gamma-rayed 3Y-TZP, and pure gold were prepared and evaluated for osteogenic potential by using a clonal murine cell line of immature osteoblasts derived from mice (MC3T3-E1 cells). The surface topography (n=3), chemical analysis of the disks (n=3), and cell morphology cultured on these surfaces were examined using scanning electron microscopy, confocal laser scanning microscopy, and energy dispersive spectroscopy. Cellular biocompatibility was analyzed for 1 and 3 days after seeding. Cell adhesion and spreading were evaluated using confocal laser scanning microscopy (n=3). Cell proliferation was evaluated using methyl thiazolyl tetrazolium assay (n=3). Kruskal-Wallis and Bonferroni corrections were used to evaluate the statistical significance of the intergroup differences (α=.05). RESULTS Gamma-ray sterilization of 3Y-TZP showed significantly higher surface roughness compared with titanium and gold (P<.002). On day 1, the proliferation and adhesion of MC3T3-E1 cells cultured on gamma-rayed 3Y-TZP were significantly higher than those cultured on gold (P<.05); however, cell spreading was significantly lower than that of titanium on days 1 and 3 (P<.05). On day 3, cell proliferation of gamma-rayed 3Y-TZP was significantly lower than that of unirradiated 3Y-TZP (P<.05). Cell adhesion of gamma-rayed 3Y-TZP was slightly lower than that of zirconia and titanium but without significant difference (P>.05). CONCLUSIONS Gamma-rayed zirconia exhibited increased surface roughness compared with titanium and significantly decreased bioactivity compared with titanium and zirconia. The use of gamma-ray sterilization on zirconia is not promising regarding biocompatibility, and the effect of this sterilization method on implant materials warrants further investigation.
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Affiliation(s)
- Le Na Lau
- Graduate student, Department of Prosthodontics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea
| | - Jun-Ho Cho
- Clinical Instructor, Department of Prosthodontics, Seoul National University Dental Hospital, Seoul, Republic of Korea
| | - Ye-Hyeon Jo
- Senior Researcher, Dental Research Institute, Seoul National University, Seoul, Republic of Korea
| | - In-Sung Luke Yeo
- Professor, Department of Prosthodontics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea..
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Bento CSA, Carrelo H, Alarico S, Empadinhas N, de Sousa HC, Teresa Cidade M, Braga MEM. Effect of ScCO 2 on the decontamination of PECs-based cryogels: A comparison with H 2O steam and H 2O 2 nebulization methods. Int J Pharm 2023; 646:123451. [PMID: 37774759 DOI: 10.1016/j.ijpharm.2023.123451] [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: 07/25/2023] [Revised: 09/25/2023] [Accepted: 09/26/2023] [Indexed: 10/01/2023]
Abstract
Biopolymers present ideal properties to be used in wound dressing solutions. By mixing two oppositely charged macromolecules it is possible to form polyelectrolyte complex (PEC) based cryogels using lyophilization. Their application in the biomedical field is limited due to their sterilization requirements, as conventional methods compromise their physicochemical properties. ScCO2 appears as an alternative method for decontamination. This work assessed several cryogel PEC formulations, chitosan-pectin, gelatine-xanthan gum and alginate-gelatine. PEC formation was confirmed by FTIR and rheological analysis. While steam sterilization compromised cryogels' chemical and morphological properties, decontamination with scCO2 proved to be a promising method for decontamination of PEC-cryogels, because, similarly to what is observed with hydrogen peroxide, it does not compromise their physicochemical properties.
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Affiliation(s)
- Cristiana S A Bento
- Chemical Process Engineering and Forest Products Research Centre (CIEPQPF), Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal
| | - Henrique Carrelo
- i3N/CENIMAT, Department of Materials Science, NOVA School of Science and Technology (FCT NOVA), Campus de Caparica, 2829-516 Caparica, Portugal
| | - Susana Alarico
- Center for Neuroscience and Cell Biology (CNC) and Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Rua Larga, Faculty of Medicine, Polo I, 1st floor, 3004-504 Coimbra, Portugal; Institute for Interdisciplinary Research (IIIUC), University of Coimbra, Casa Costa Alemão - Pólo II, 3030-789 Coimbra, Portugal
| | - Nuno Empadinhas
- Center for Neuroscience and Cell Biology (CNC) and Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Rua Larga, Faculty of Medicine, Polo I, 1st floor, 3004-504 Coimbra, Portugal; Institute for Interdisciplinary Research (IIIUC), University of Coimbra, Casa Costa Alemão - Pólo II, 3030-789 Coimbra, Portugal
| | - Hermínio C de Sousa
- Chemical Process Engineering and Forest Products Research Centre (CIEPQPF), Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal
| | - Maria Teresa Cidade
- i3N/CENIMAT, Department of Materials Science, NOVA School of Science and Technology (FCT NOVA), Campus de Caparica, 2829-516 Caparica, Portugal
| | - Mara E M Braga
- Chemical Process Engineering and Forest Products Research Centre (CIEPQPF), Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal.
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7
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S A Bento C, Gaspar MC, Coimbra P, de Sousa HC, E M Braga M. A review of conventional and emerging technologies for hydrogels sterilization. Int J Pharm 2023; 634:122671. [PMID: 36736965 DOI: 10.1016/j.ijpharm.2023.122671] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 01/26/2023] [Accepted: 01/28/2023] [Indexed: 02/04/2023]
Abstract
Hydrogels are extensively used in the biomedical field, as drug delivery systems, wound dressings, contact lenses or as scaffolds for tissue engineering. Due to their polymeric nature and the presence of high amounts of water in their structure, hydrogels generally present high sensitivity to terminal sterilization. The establishment of an efficient sterilization protocol that does not compromise the functional properties of the hydrogels is one of the challenges faced by researchers when developing a hydrogel for a specific application. Yet, until very recently this aspect was largely ignored in the literature. The present paper reviews the state of literature concerning hydrogels sterilization, compiling the main findings. Conventional terminal sterilization methods (heat sterilization, radiation sterilization, and gas sterilization) as well as emerging sterilization techniques (ozone, supercritical carbon dioxide) are covered. Considerations about aseptic processing are also included. Additionally, and as a framework, hydrogels' polymeric materials, types of networks, and main biomedical applications are summarily described.
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Affiliation(s)
- Cristiana S A Bento
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, Rua Sílvio Lima, Pólo II - Pinhal de Marrocos, 3030-790 Coimbra, Portugal
| | - Marisa C Gaspar
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, Rua Sílvio Lima, Pólo II - Pinhal de Marrocos, 3030-790 Coimbra, Portugal; Center for Innovative Care and Health Technology (ciTechCare), Polytechnic of Leiria, 2410-541 Leiria, Portugal
| | - Patrícia Coimbra
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, Rua Sílvio Lima, Pólo II - Pinhal de Marrocos, 3030-790 Coimbra, Portugal
| | - Hermínio C de Sousa
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, Rua Sílvio Lima, Pólo II - Pinhal de Marrocos, 3030-790 Coimbra, Portugal
| | - Mara E M Braga
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, Rua Sílvio Lima, Pólo II - Pinhal de Marrocos, 3030-790 Coimbra, Portugal.
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Chen L, Gao Y, Ge J, Zhou Y, Yang Z, Li C, Huang B, Lu K, Kou D, Zhou D, Chen C, Wang S, Wu S, Zeng J, Huang G, Gao M. A clinically translatable kit for MRI/NMI dual-modality nanoprobes based on anchoring group-mediated radiolabeling. NANOSCALE 2023; 15:3991-3999. [PMID: 36723217 DOI: 10.1039/d2nr05988f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Magnetic resonance imaging (MRI)/nuclear medicine imaging (NMI) dual-modality imaging based on radiolabeled nanoparticles has been increasingly exploited for accurate diagnosis of tumor and cardiovascular diseases by virtue of high spatial resolution and high sensitivity. However, significant challenges exist in pursuing truly clinical applications, including massive preparation and rapid radiolabeling of nanoparticles. Herein, we report a clinically translatable kit for the convenient construction of MRI/NMI nanoprobes relying on the flow-synthesis and anchoring group-mediated radiolabeling (LAGMERAL) of iron oxide nanoparticles. First, homogeneous iron oxide nanoparticles with excellent performance were successfully obtained on a large scale by flow synthesis, followed by the surface anchoring of diphosphonate-polyethylene glycol (DP-PEG) to simultaneously render the underlying nanoparticles biocompatible and competent in robust labeling of radioactive metal ions. Moreover, to enable convenient and safe usage in clinics, the DP-PEG modified nanoparticle solution was freeze-dried and sterilized to make a radiolabeling kit followed by careful evaluations of its in vitro and in vivo performance and applicability. The results showed that 99mTc labeled nanoprobes are effectively obtained with a labeling yield of over 95% in 30 minutes after simply injecting Na[99mTcO4] solution into the kit. In addition, the Fe3O4 nanoparticles sealed in the kit can well stand long-term storage even for 300 days without deteriorating the colloidal stability and radiolabeling yield. Upon intravenous injection of the as-prepared radiolabeled nanoprobes, high-resolution vascular images of mice were obtained by vascular SPECT imaging and magnetic resonance angiography, demonstrating the promising clinical translational value of our radiolabeling kit.
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Affiliation(s)
- Lei Chen
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
| | - Yun Gao
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
| | - Jianxian Ge
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
| | - Yi Zhou
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
| | - Zhe Yang
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
| | - Cang Li
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
| | - Baoxing Huang
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
| | - Kuan Lu
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
| | - Dandan Kou
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
| | - Dandan Zhou
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
| | - Can Chen
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
| | - Sixia Wang
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
| | - Shuwang Wu
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
| | - Jianfeng Zeng
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
| | - Gang Huang
- Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China
| | - Mingyuan Gao
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, China.
- Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China
- The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
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9
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Peng W, Lu X, Wu J, Wang Y, Zhu X, Ouyang H, Li L, Wu J, Liu Y, Bao J. Autoclaving pHEMA-Based Hydrogels Immersed in Deionized Water has No Effect on Physicochemical Properties and Cell Behaviors. ACS OMEGA 2022; 7:32038-32045. [PMID: 36120001 PMCID: PMC9475621 DOI: 10.1021/acsomega.2c03096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 07/21/2022] [Indexed: 05/16/2023]
Abstract
Hydrogels based on poly-(2-hydroxyethyl methacrylate) (pHEMA) have been widely used as biomaterials in tissue engineering due to their biocompatibility, hydrophilicity, and low friction coefficient. The terminal sterilization of hydrogels is a critical step in clinical applications. However, regulations and standardization for the sterilization of hydrogels based on pHEMA are still lacking. In this study, we explored six sterilization methods on pHEMA-based materials (A1: pHEMA, A2: pHEMA copolymerizes with acrylic acid, and A3: pHEMA copolymerizes with acrylic acid and further coordinated with iron ions), such as gamma irradiation, 75% ethanol, ultraviolet (UV), ethylene oxide (EtO), and autoclaving with or without deionized water (autoclaving-H2O or autoclaving-dry). Combining results from the multifaceted approaches with assessment, pHEMA-based hydrogels can be completely sterilized via the autoclaving-H2O method analyzed by sterilized testing. The physicochemical properties and cell behavior of sterilized hydrogels were not influenced by this sterilization approach, validated by Fourier transform infrared (FT-IR) spectroscopy and tensile tests. The pHEMA-based hydrogel sterilized by the autoclaving-H2O method also had no effect on the cell behavior evaluated by in vitro cytotoxicity experiments and caused no evident inflammatory reaction in tissue in vivo implantation experiments. However, it was also found that there were still some defects in the A2 and A3 groups as biomaterials possibly because of an inappropriate proportion of formulations or raw material used in exploring sterilization methods. These findings have implications for the improvement and clinical application of pHEMA-based hydrogels.
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Affiliation(s)
- Wanliu Peng
- Institute
of Clinical Pathology, Key Laboratory of Transplant Engineering and
Immunology, NHC, West China Hospital, Sichuan
University, Chengdu 610041, Sichuan Province, China
| | - Xingbing Lu
- Department
of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Junliang Wu
- Department
of Plastic and Burn Surgery, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Yi Wang
- College
of Chemistry and Materials Science, Sichuan
Normal University, Chengdu 610068, Sichuan Province, China
| | - Xinglong Zhu
- Institute
of Clinical Pathology, Key Laboratory of Transplant Engineering and
Immunology, NHC, West China Hospital, Sichuan
University, Chengdu 610041, Sichuan Province, China
| | - Hongyan Ouyang
- College
of Chemistry and Materials Science, Sichuan
Normal University, Chengdu 610068, Sichuan Province, China
| | - Li Li
- Institute
of Clinical Pathology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Jinrong Wu
- College of
Polymer Science & Materials, State Key Laboratory of Polymer Materials
Engineering, Sichuan University, Chengdu 610065, Sichuan Province, China
| | - Yong Liu
- Department
of Plastic and Burn Surgery, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Ji Bao
- Institute
of Clinical Pathology, Key Laboratory of Transplant Engineering and
Immunology, NHC, West China Hospital, Sichuan
University, Chengdu 610041, Sichuan Province, China
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10
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Hoyle H, Stenger C, Przyborski S. Design considerations of benchtop fluid flow bioreactors for bio-engineered tissue equivalents in vitro. BIOMATERIALS AND BIOSYSTEMS 2022; 8:100063. [PMID: 36824373 PMCID: PMC9934498 DOI: 10.1016/j.bbiosy.2022.100063] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 07/08/2022] [Accepted: 08/30/2022] [Indexed: 10/14/2022] Open
Abstract
One of the major aims of bio-engineering tissue equivalents in vitro is to create physiologically relevant culture conditions to accurately recreate the cellular microenvironment. This often includes incorporation of factors such as the extracellular matrix, co-culture of multiple cell types and three-dimensional culture techniques. These advanced techniques can recapitulate some of the properties of tissue in vivo, however fluid flow is a key aspect that is often absent. Fluid flow can be introduced into cell and tissue culture using bioreactors, which are becoming increasingly common as we seek to produce increasingly accurate tissue models. Bespoke technology is continuously being developed to tailor systems for specific applications and to allow compatibility with a range of culture techniques. For effective perfusion of a tissue culture many parameters can be controlled, ranging from impacts of the fluid flow such as increased shear stress and mass transport, to potentially unwanted side effects such as temperature fluctuations. A thorough understanding of these properties and their implications on the culture model can aid with a more accurate interpretation of results. Improved and more complete characterisation of bioreactor properties will also lead to greater accuracy when reporting culture conditions in protocols, aiding experimental reproducibility, and allowing more precise comparison of results between different systems. In this review we provide an analysis of the different factors involved in the development of benchtop flow bioreactors and their potential biological impacts across a range of applications.
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Key Words
- 3D, three-dimensional
- ABS, acrylonitrile butadiene styrene
- ALI, air-liquid interface
- Bioreactors
- CFD, computational fluid dynamics
- Cell culture
- ECM, extracellular matrix
- FDM, fused deposition modelling
- Fluid flow
- PC, polycarbonate
- PET, polyethylene terephthalate
- PLA, polylactic acid
- PTFE, polytetrafluoroethylene
- SLA, stereolithography
- Tissue engineering
- UL, unstirred layer
- UV, ultraviolet light
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Affiliation(s)
- H.W. Hoyle
- Department of Biosciences, Durham University, South Road, Durham DH1 3LE, UK
| | - C.M.L. Stenger
- Department of Biosciences, Durham University, South Road, Durham DH1 3LE, UK
| | - S.A. Przyborski
- Department of Biosciences, Durham University, South Road, Durham DH1 3LE, UK,NETPark Incubator, Reprocell Europe Ltd., Thomas Wright Way, Sedgefield TS21 3FD, UK,Corresponding author at: Department of Biosciences, Durham University, South Road, Durham DH1 3LE, UK.
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11
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Cheesbrough A, Sciscione F, Riccio F, Harley P, R'Bibo L, Ziakas G, Darbyshire A, Lieberam I, Song W. Biobased Elastomer Nanofibers Guide Light-Controlled Human-iPSC-Derived Skeletal Myofibers. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2110441. [PMID: 35231133 PMCID: PMC9131876 DOI: 10.1002/adma.202110441] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 02/25/2022] [Indexed: 05/07/2023]
Abstract
Generating skeletal muscle tissue that mimics the cellular alignment, maturation, and function of native skeletal muscle is an ongoing challenge in disease modeling and regenerative therapies. Skeletal muscle cultures require extracellular guidance and mechanical support to stabilize contractile myofibers. Existing microfabrication-based solutions are limited by complex fabrication steps, low throughput, and challenges in measuring dynamic contractile function. Here, the synthesis and characterization of a new biobased nanohybrid elastomer, which is electrospun into aligned nanofiber sheets to mimic the skeletal muscle extracellular matrix, is presented. The polymer exhibits remarkable hyperelasticity well-matched to that of native skeletal muscle (≈11-50 kPa), with ultimate strain ≈1000%, and elastic modulus ≈25 kPa. Uniaxially aligned nanofibers guide myoblast alignment, enhance sarcomere formation, and promote a ≈32% increase in myotube fusion and ≈50% increase in myofiber maturation. The elastomer nanofibers stabilize optogenetically controlled human induced pluripotent stem cell derived skeletal myofibers. When activated by blue light, the myofiber-nanofiber hybrid constructs maintain a significantly higher (>200%) contraction velocity and specific force (>280%) compared to conventional culture methods. The engineered myofibers exhibit a power density of ≈35 W m-3 . This system is a promising new skeletal muscle tissue model for applications in muscular disease modeling, drug discovery, and muscle regeneration.
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Affiliation(s)
- Aimee Cheesbrough
- UCL Centre for Biomaterials in Surgical Reconstruction and RegenerationDepartment of Surgical BiotechnologyDivision of Surgery and Interventional ScienceUniversity College LondonLondonNW3 2PFUK
- Centre for Gene Therapy and Regenerative MedicineMRC Centre for Neurodevelopmental DisordersCentre for Developmental NeurobiologyKings College LondonLondonSE1 9RTUK
| | - Fabiola Sciscione
- UCL Centre for Biomaterials in Surgical Reconstruction and RegenerationDepartment of Surgical BiotechnologyDivision of Surgery and Interventional ScienceUniversity College LondonLondonNW3 2PFUK
| | - Federica Riccio
- Centre for Gene Therapy and Regenerative MedicineMRC Centre for Neurodevelopmental DisordersCentre for Developmental NeurobiologyKings College LondonLondonSE1 9RTUK
| | - Peter Harley
- Centre for Gene Therapy and Regenerative MedicineMRC Centre for Neurodevelopmental DisordersCentre for Developmental NeurobiologyKings College LondonLondonSE1 9RTUK
| | - Lea R'Bibo
- Centre for Gene Therapy and Regenerative MedicineMRC Centre for Neurodevelopmental DisordersCentre for Developmental NeurobiologyKings College LondonLondonSE1 9RTUK
| | - Georgios Ziakas
- UCL Centre for Biomaterials in Surgical Reconstruction and RegenerationDepartment of Surgical BiotechnologyDivision of Surgery and Interventional ScienceUniversity College LondonLondonNW3 2PFUK
| | - Arnold Darbyshire
- UCL Centre for Biomaterials in Surgical Reconstruction and RegenerationDepartment of Surgical BiotechnologyDivision of Surgery and Interventional ScienceUniversity College LondonLondonNW3 2PFUK
| | - Ivo Lieberam
- Centre for Gene Therapy and Regenerative MedicineMRC Centre for Neurodevelopmental DisordersCentre for Developmental NeurobiologyKings College LondonLondonSE1 9RTUK
| | - Wenhui Song
- UCL Centre for Biomaterials in Surgical Reconstruction and RegenerationDepartment of Surgical BiotechnologyDivision of Surgery and Interventional ScienceUniversity College LondonLondonNW3 2PFUK
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12
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Sequential scCO2 Drying and Sterilisation of Alginate-Gelatine Aerogels for Biomedical Applications. J Supercrit Fluids 2022. [DOI: 10.1016/j.supflu.2022.105570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Zhang L, Narita C, Himeda Y, Honma H, Yamada K. Development of highly oil-absorbent polylactic-acid microfibers with a nanoporous structure via simple one-step centrifugal spinning. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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14
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Wang K, Bao G, Fan Q, Zhu L, Yang L, Liu T, Zhang Z, Li G, Chen X, Xu X, Xu X, He B, Zheng Y. Feasibility evaluation of a Cu-38 Zn alloy for intrauterine devices: In vitro and in vivo studies. Acta Biomater 2022; 138:561-575. [PMID: 34774783 DOI: 10.1016/j.actbio.2021.11.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 10/29/2021] [Accepted: 11/04/2021] [Indexed: 11/01/2022]
Abstract
The existing adverse effects of copper in copper-containing intrauterine devices (Cu-IUDs) have raised concerns regarding their use. These adverse effects include burst release of cupric ions (Cu2+) at the initial stage and an increasingly rough surface of the Cu-IUDs. In this study, we investigated the use of two copper alloys, Cu-38 Zn and H62 as the new upgrading or alternative material for IUDs. Their corrosive properties were studied in simulated uterine fluid (SUF) by using electrochemical methods, with pure Cu as a control. We studied the in vitro long-term corrosion behaviors in SUF, cytotoxicity to uterine cells (human endometrial epithelial cells and human endometrial stromal cells), in vivo biocompatibility and contraceptive efficacy of pure Cu, H62, and Cu-38 Zn. In the first month, the burst release rate of Cu2+ in the Cu-38 Zn group was significantly lower than those in the pure Cu and H62 groups. The in vitro cytocompatibility Cu-38 Zn was better than that of pure Cu and H62. Moreover, Cu-38 Zn showed improved tissue biocompatibility in vivo experiments. Therefore, the contraceptive efficacy of the Cu-38 Zn is still maintained as high as the pure Cu while the adverse effects are significantly eased, suggesting that Cu-38 Zn can be a suitable potential candidate material for IUDs. STATEMENT OF SIGNIFICANCE: The existing adverse effects associated with the intrinsic properties of copper materials for copper-containing intrauterine devices (Cu-IUD) are of concern in their employment. Such as, burst release of cupric ions (Cu2+) at the initial stage and an increasingly rough surface of the Cu-IUD. In this work, Cu alloyed with a high amount of bioactive Zn was used for a Cu-IUD. The Cu-38 Zn alloy exhibited reduced burst release of Cu2+ within the first month compared with the pure Cu and H62. Furthermore, the Cu-38 Zn alloy displayed significantly improved biocompatibility and a much smoother surface. Therefore, high antifertility efficacy of the Cu-38 Zn alloy was well maintained, while the adverse effects are significantly eased, suggesting that the Cu-38 Zn alloy is promising for a Cu-IUD.
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15
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Ozimek J, Pielichowski K. Recent Advances in Polyurethane/POSS Hybrids for Biomedical Applications. Molecules 2021; 27:molecules27010040. [PMID: 35011280 PMCID: PMC8746980 DOI: 10.3390/molecules27010040] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/17/2021] [Accepted: 12/19/2021] [Indexed: 11/16/2022] Open
Abstract
Advanced organic-inorganic materials-composites, nanocomposites, and hybrids with various compositions offer unique properties required for biomedical applications. One of the most promising inorganic (nano)additives are polyhedral oligomeric silsesquioxanes (POSS); their biocompatibility, non-toxicity, and phase separation ability that modifies the material porosity are fundamental properties required in modern biomedical applications. When incorporated, chemically or physically, into polyurethane matrices, they substantially change polymer properties, including mechanical properties, surface characteristics, and bioactivity. Hence, this review is dedicated to POSS-PU composites that have recently been developed for applications in the biomedical field. First, different modes of POSS incorporation into PU structure have been presented, then recent developments of PU/POSS hybrids as bio-active composites for scaffolds, cardiovascular stents, valves, and membranes, as well as in bio-imaging and cancer treatment, have been described. Finally, characterization and methods of modification routes of polyurethane-based materials with silsesquioxanes were presented.
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16
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Farr N, Thanarak J, Schäfer J, Quade A, Claeyssens F, Green N, Rodenburg C. Understanding Surface Modifications Induced via Argon Plasma Treatment through Secondary Electron Hyperspectral Imaging. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2003762. [PMID: 33643809 PMCID: PMC7887591 DOI: 10.1002/advs.202003762] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 11/10/2020] [Indexed: 06/01/2023]
Abstract
Understanding the effects that sterilization methods have on the surface of a biomaterial is a prerequisite for clinical deployment. Sterilization causes alterations in a material's surface chemistry and surface structures that can result in significant changes to its cellular response. Here we compare surfaces resulting from the application of the industry standard autoclave sterilisation to that of surfaces resulting from the use of low-pressure Argon glow discharge within a novel gas permeable packaging method in order to explore a potential new biomaterial sterilisation method. Material surfaces are assessed by applying secondary electron hyperspectral imaging (SEHI). SEHI is a novel low-voltage scanning electron microscopy based characterization technique that, in addition to capturing topographical images, also provides nanoscale resolution chemical maps by utilizing the energy distribution of emitted secondary electrons. Here, SEHI maps are exploited to assess the lateral distributions of diverse functional groups that are effected by the sterilization treatments. This information combined with a range of conventional surface analysis techniques and a cellular metabolic activity assay reveals persuasive reasons as to why low-pressure argon glow discharge should be considered for further optimization as a potential terminal sterilization method for PGS-M, a functionalized form of poly(glycerol sebacate) (PGS).
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Affiliation(s)
- Nicholas Farr
- Department of Materials Science and EngineeringSir Robert Hadfield BuildingUniversity of SheffieldMappin StreetSheffieldS1 3JDUK
- Insigneo Institute for In Silico MedicineThe Pam Liversidge BuildingSir Robert Hadfield BuildingUniversity of SheffieldMappin StreetSheffieldS1 3JDUK
| | - Jeerawan Thanarak
- Department of Materials Science and EngineeringSir Robert Hadfield BuildingUniversity of SheffieldMappin StreetSheffieldS1 3JDUK
- Insigneo Institute for In Silico MedicineThe Pam Liversidge BuildingSir Robert Hadfield BuildingUniversity of SheffieldMappin StreetSheffieldS1 3JDUK
| | - Jan Schäfer
- Leibniz Institute for Plasma Science and Technology (INP e.V.)Felix‐Hausdorff‐Str. 2Greifswald17489Germany
| | - Antje Quade
- Leibniz Institute for Plasma Science and Technology (INP e.V.)Felix‐Hausdorff‐Str. 2Greifswald17489Germany
| | - Frederik Claeyssens
- Department of Materials Science and EngineeringSir Robert Hadfield BuildingUniversity of SheffieldMappin StreetSheffieldS1 3JDUK
- Insigneo Institute for In Silico MedicineThe Pam Liversidge BuildingSir Robert Hadfield BuildingUniversity of SheffieldMappin StreetSheffieldS1 3JDUK
| | - Nicola Green
- Department of Materials Science and EngineeringSir Robert Hadfield BuildingUniversity of SheffieldMappin StreetSheffieldS1 3JDUK
- Insigneo Institute for In Silico MedicineThe Pam Liversidge BuildingSir Robert Hadfield BuildingUniversity of SheffieldMappin StreetSheffieldS1 3JDUK
| | - Cornelia Rodenburg
- Department of Materials Science and EngineeringSir Robert Hadfield BuildingUniversity of SheffieldMappin StreetSheffieldS1 3JDUK
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Riau AK, Lwin NC, Gelfand L, Hu H, Liedberg B, Chodosh J, Venkatraman SS, Mehta JS. Surface modification of corneal prosthesis with nano-hydroxyapatite to enhance in vivo biointegration. Acta Biomater 2020; 107:299-312. [PMID: 31978623 DOI: 10.1016/j.actbio.2020.01.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 01/15/2020] [Accepted: 01/16/2020] [Indexed: 12/11/2022]
Abstract
The majority of clinical corneal prostheses (KPros) adopt a core-skirt configuration. This configuration is favored owing to the optic core (generally a cylindrical, acrylic-based material, such as PMMA), that not only provides a clear window for the patients' vision, but also confers resistance to biodegradability. The surrounding skirt (typically a biological material, such as corneal tissue) allows for host tissue integration. However, due to poor biointegration between the dissimilar core and skirt materials, it results in a weak adhesion at the interface, giving rise to clinical complications, such as bacterial infections in the tissue-PMMA interface and device extrusion. Here, we physically immobilized nano-hydroxyapatite (nHAp) on a PMMA cylinder via a dip-coating technique, to create a bioactive surface that improved biointegration in vivo. We established that the nHAp coating was safe and stable in the rabbit cornea over five weeks. More importantly, we found that apoptotic, wound healing and inflammatory responses to nHAp-coated PMMA were substantially milder than to non-coated PMMA. More mature collagen, similar to the non-operated cornea, was maintained in the corneal stroma adjacent to the nHAp-coated implant edge. However, around the non-coated cylinder, an abundant new and loose connective tissue formed, similar to bone tissue response to bioinert scaffolds. As a result of superior biointegration, tissue adhesion with nHAp-coated PMMA cylinders was also significantly enhanced compared to non-coated cylinders. This study set a precedent for the future application of the nHAp coating on clinical KPros. STATEMENT OF SIGNIFICANCE: Currently, all clinical corneal prostheses utilize as-manufactured, non-surface modified PMMA optic cylinder. The bioinert cylinder, however, has poor biointegration and adhesion with the surrounding biological tissue, which can give rise to postoperative complications, such as microbial invasion in the tissue-PMMA loose interface and PMMA optic cylinder extrusion. In the current study, we showed that surface modification of the PMMA cylinder with bioactive nano-hydroxyapatite (nHAp) significantly enhanced its biointegration with corneal stromal tissue in vivo. The superior biointegration of the nHAp-coated PMMA was signified by a more attenuated corneal wound healing, inflammatory and fibrotic response, and better tissue apposition, as well as a significantly improved corneal stromal tissue adhesion when compared to the non-coated PMMA.
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18
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Tapia-Guerrero YS, Del Prado-Audelo ML, Borbolla-Jiménez FV, Giraldo Gomez DM, García-Aguirre I, Colín-Castro CA, Morales-González JA, Leyva-Gómez G, Magaña JJ. Effect of UV and Gamma Irradiation Sterilization Processes in the Properties of Different Polymeric Nanoparticles for Biomedical Applications. MATERIALS 2020; 13:ma13051090. [PMID: 32121529 PMCID: PMC7084644 DOI: 10.3390/ma13051090] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 02/19/2020] [Accepted: 02/25/2020] [Indexed: 02/07/2023]
Abstract
The sterilization processes of nanoparticles (NP) by autoclaving and filtration are two of the most utilized methods in the pharmaceutical industry but are not always a viable option. For this reason, the search for alternative options such as UV and gamma radiation is of interest. In this work, we evaluated both types of sterilization on two types of NP in solid state widely employed in the literature for biomedical applications, poly-(ε-caprolactone) and poly(D, L-lactide-co-glycolide) acid NP stabilized with polyvinyl alcohol. Physicochemical properties and cell viability were studied pre- and post-sterilization. The efficiency of irradiation sterilization was performed by a test of sterility using 1 × 108 CFU/mL of Escherichia coli, Staphylococcus aureus, and Candida albicans. Microbiological monitoring revealed that both methods were sufficient for sterilization. After the UV irradiation sterilization (100 µJ/cm2), no substantial changes were observed in the physicochemical properties of the NP or in the interaction or morphology of human glial cells, though 5 and 10 kGy of gamma irradiation showed slight changes of NP size as well as a decrease in cell viability (from 100 µg/mL of NP). At 5 kGy of radiation doses, the presence of trehalose as cryoprotectant reduces the cell damage with high concentrations of NP, but this did not occur at 10 kGy. Therefore, these methods could be highly effective and low-processing-time options for sterilizing NP for medical purposes. However, we suggest validating each NP system because these generally are of different polymer-composition systems.
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Affiliation(s)
- Y. S. Tapia-Guerrero
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón, Ciudad de México 11340, Mexico; (Y.S.T.-G.); (J.A.M.-G.)
- Laboratorio de Medicina Genómica, Departamento de Genética (CENIAQ), Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra (INR-LGII), Ciudad de México 14389, Mexico; (F.V.B.-J.); (C.A.C.-C.)
| | - M. L. Del Prado-Audelo
- Laboratorio de Tecnología Farmacéutica, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlán Izcalli, Edo. de México 54740, Mexico;
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México 04510, Mexico
| | - F. V. Borbolla-Jiménez
- Laboratorio de Medicina Genómica, Departamento de Genética (CENIAQ), Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra (INR-LGII), Ciudad de México 14389, Mexico; (F.V.B.-J.); (C.A.C.-C.)
- Programa de Ciencias Biomédicas, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - D. M. Giraldo Gomez
- Departamento de Biología Celular y Tisular, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Edificio “A” 3er piso, Circuito Interior, Avenida Universidad 3000, Ciudad Universitaria, Coyoacán, Ciudad de México 04510, Mexico
- Unidad de Microscopía, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Edificio “A” planta baja, Circuito Interior, Avenida Universidad 3000, Ciudad Universitaria, Coyoacán, Ciudad de México 04510, Mexico
| | - I. García-Aguirre
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados (CINVESTAV-IPN), Ciudad de México 07360, Mexico
| | - C. A. Colín-Castro
- Laboratorio de Medicina Genómica, Departamento de Genética (CENIAQ), Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra (INR-LGII), Ciudad de México 14389, Mexico; (F.V.B.-J.); (C.A.C.-C.)
- Departamento de Infectología, (CENIAQ), Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra, Ciudad de México (CDMX) 14389, Mexico
| | - J. A. Morales-González
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón, Ciudad de México 11340, Mexico; (Y.S.T.-G.); (J.A.M.-G.)
| | - G. Leyva-Gómez
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México 04510, Mexico
- Correspondence: (G.L.-G.); or (J.J.M.); Tel.: +52-(55)-5622-3899 (G.L.-G.); +52-(55)-5999-1000 (J.J.M.)
| | - J. J. Magaña
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón, Ciudad de México 11340, Mexico; (Y.S.T.-G.); (J.A.M.-G.)
- Laboratorio de Medicina Genómica, Departamento de Genética (CENIAQ), Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra (INR-LGII), Ciudad de México 14389, Mexico; (F.V.B.-J.); (C.A.C.-C.)
- Escuela de Ingeniería, Departamento de Biotecnología, Instituto Tecnológico y de Estudios Superiores de Monterrey-Campus, Ciudad de México 14380, Mexico
- Correspondence: (G.L.-G.); or (J.J.M.); Tel.: +52-(55)-5622-3899 (G.L.-G.); +52-(55)-5999-1000 (J.J.M.)
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19
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Inoue Y, Tashiro A, Kawase Y, Isoyama T, Saito I, Ono T, Hara S, Ishii K, Yurimoto T, Shiraishi Y, Yamada A, Yambe T, Abe Y. Optimum Sterilization Methods of Biocompatible Hybrid Material for Artificial Organs. ADVANCED BIOMEDICAL ENGINEERING 2020. [DOI: 10.14326/abe.9.83] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Yusuke Inoue
- Institute of Development, Aging and Cancer, Tohoku University
- Graduate School of Medicine, University of Tokyo
- Advanced Medical Engineering Research Center, Asahikawa Medical University
| | | | | | | | - Itsuro Saito
- Graduate School of Medicine, University of Tokyo
| | - Toshiya Ono
- Graduate School of Medicine, University of Tokyo
| | | | - Kohei Ishii
- National Institute of Technology, Kagawa College
| | | | | | - Akihiro Yamada
- Institute of Development, Aging and Cancer, Tohoku University
| | - Tomoyuki Yambe
- Institute of Development, Aging and Cancer, Tohoku University
| | - Yusuke Abe
- Graduate School of Medicine, University of Tokyo
- Department of Medical and General Sciences, Nihon Institute of Medical Science
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Kruppke B, Farack J, Weil S, Aflalo ED, Poláková D, Sagi A, Hanke T. Crayfish hemocyanin on chitin bone substitute scaffolds promotes the proliferation and osteogenic differentiation of human mesenchymal stem cells. J Biomed Mater Res A 2019; 108:694-708. [DOI: 10.1002/jbm.a.36849] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 11/15/2019] [Accepted: 11/18/2019] [Indexed: 01/19/2023]
Affiliation(s)
- Benjamin Kruppke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden Dresden Germany
| | - Jana Farack
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden Dresden Germany
| | - Simy Weil
- Department of Life Sciences Ben‐Gurion University of the Negev Beer‐Sheva Israel
| | - Eliahu David Aflalo
- Department of Life Sciences Ben‐Gurion University of the Negev Beer‐Sheva Israel
- Department of Life Sciences Achva Academic College Arugot Israel
| | - Dagmar Poláková
- Faculty of Mechatronics and Interdisciplinary Engineering Studies, Technical University of Liberec Liberec Czech Republic
| | - Amir Sagi
- Department of Life Sciences Ben‐Gurion University of the Negev Beer‐Sheva Israel
- The National Institute for Biotechnology in the Negev, Ben‐Gurion University of the Negev Beer‐Sheva Israel
| | - Thomas Hanke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden Dresden Germany
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21
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Evaluation of Sterilisation Techniques for Regenerative Medicine Scaffolds Fabricated with Polyurethane Nonbiodegradable and Bioabsorbable Nanocomposite Materials. Int J Biomater 2018; 2018:6565783. [PMID: 30405715 PMCID: PMC6192142 DOI: 10.1155/2018/6565783] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 06/18/2018] [Accepted: 08/09/2018] [Indexed: 12/31/2022] Open
Abstract
An effective sterilisation technique that maintains structure integrity, mechanical properties, and biocompatibility is essential for the translation of new biomaterials to the clinical setting. We aimed to establish an effective sterilisation technique for a biodegradable (POSS-PCL) and nonbiodegradable (POSS-PCU) nanocomposite scaffold that maintains stem cell biocompatibility. Scaffolds were sterilised using 70% ethanol, ultraviolet radiation, bleach, antibiotic/antimycotic, ethylene oxide, gamma irradiation, argon plasma, or autoclaving. Samples were immersed in tryptone soya broth and thioglycollate medium and inspected for signs of microbial growth. Scaffold surface and mechanical and molecular weight properties were investigated. AlamarBlue viability assay of adipose derived stem cells (ADSC) seeded on scaffolds was performed to investigate metabolic activity. Confocal imaging of rhodamine phalloidin and DAPI stained ADSCs was performed to evaluate morphology. Ethylene oxide, gamma irradiation, argon plasma, autoclaving, 70% ethanol, and bleach were effective in sterilising the scaffolds. Autoclaving, gamma irradiation, and ethylene oxide led to a significant change in the molecular weight distribution of POSS-PCL and gamma irradiation and ethylene oxide to that of POSS-PCU (p<0.05). UV, ethanol, gamma irradiation, and ethylene oxide caused significant changes in the mechanical properties of POSS-PCL (p<0.05). Argon was associated with significantly higher surface wettability and ADSC metabolic activity (p<0.05). In this study, argon plasma was an effective sterilisation technique for both nonbiodegradable and biodegradable nanocomposite scaffolds. Argon plasma should be further investigated as a potential sterilisation technique for medical devices.
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Godoy DJD, Chokboribal J, Pauwels R, Banlunara W, Sangvanich P, Jaroenporn S, Thunyakitpisal P. Acemannan increased bone surface, bone volume, and bone density in a calvarial defect model in skeletally-mature rats. J Dent Sci 2018; 13:334-341. [PMID: 30895142 PMCID: PMC6388811 DOI: 10.1016/j.jds.2018.06.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 04/09/2018] [Indexed: 12/21/2022] Open
Abstract
Background/purpose Acemannan, a β-(1-4)-acetylated polymannose extracted from Aloe vera gel, has been proposed as biomaterial for bone regeneration. The aim of this study was to investigate the effect of acemannan in calvarial defect healing. Materials and methods Acemannan was processed to freeze-dried sponge form and disinfected by UV irradiation. Thirty-five female Sprague-Dawley rats were used in the in vivo study. Seven-mm diameter mid-calvarial defects were created and randomly allocated into blood clot control (C), acemannan 1 mg (A1), 2 mg (A2), 4 mg (A4), and 8 mg (A8) groups (n = 7). After four weeks, the calvarial specimens were subjected to microcomputed tomography (microCT) and histopathological analysis. Results MicroCT revealed a significant increase in bone surface and bone volume in the A1 and A2 groups, and tissue mineral density in the A4 and A8 groups compared with the control group (p < 0.05). Histologically, the acemannan-treated groups had denser bone matrix compared with the control group. Conclusion Acemannan is an effective bioactive agent for bone regeneration, enhancing bone growth as assayed in two- and three-dimensions.
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Affiliation(s)
- Dyna Jeanne D Godoy
- Dental Biomaterials Science Program, Graduate School, Chulalongkorn University, Bangkok, Thailand.,Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Jaroenporn Chokboribal
- Department of Materials Science, Faculty of Science and Technology, Phranakhon Rajabhat University, Bangkok, Thailand
| | - Ruben Pauwels
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Biomedical Sciences Group, KU Leuven, Leuven, Belgium.,Department of Radiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Wijit Banlunara
- Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - Polkit Sangvanich
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Sukanya Jaroenporn
- Primate Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Pasutha Thunyakitpisal
- Research Unit of Herbal Medicine, Biomaterial and Material for Dental Treatment, Department of Anatomy, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
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Lowinger MB, Barrett SE, Zhang F, Williams RO. Sustained Release Drug Delivery Applications of Polyurethanes. Pharmaceutics 2018; 10:E55. [PMID: 29747409 PMCID: PMC6027189 DOI: 10.3390/pharmaceutics10020055] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 05/02/2018] [Accepted: 05/04/2018] [Indexed: 12/18/2022] Open
Abstract
Since their introduction over 50 years ago, polyurethanes have been applied to nearly every industry. This review describes applications of polyurethanes to the development of modified release drug delivery. Although drug delivery research leveraging polyurethanes has been ongoing for decades, there has been renewed and substantial interest in the field in recent years. The chemistry of polyurethanes and the mechanisms of drug release from sustained release dosage forms are briefly reviewed. Studies to assess the impact of intrinsic drug properties on release from polyurethane-based formulations are considered. The impact of hydrophilic water swelling polyurethanes on drug diffusivity and release rate is discussed. The role of pore formers in modulating drug release rate is examined. Finally, the value of assessing mechanical properties of the dosage form and approaches taken in the literature are described.
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Affiliation(s)
- Michael B Lowinger
- College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, TX 78712, USA.
- MRL, Merck & Co., Inc., 126 E. Lincoln Ave, Rahway, NJ 07065, USA.
| | | | - Feng Zhang
- College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, TX 78712, USA.
| | - Robert O Williams
- College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, TX 78712, USA.
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Drug-eluting silicone hydrogel for therapeutic contact lenses: Impact of sterilization methods on the system performance. Colloids Surf B Biointerfaces 2018; 161:537-546. [DOI: 10.1016/j.colsurfb.2017.11.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 10/17/2017] [Accepted: 11/07/2017] [Indexed: 01/03/2023]
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Galante R, Pinto TJA, Colaço R, Serro AP. Sterilization of hydrogels for biomedical applications: A review. J Biomed Mater Res B Appl Biomater 2017; 106:2472-2492. [PMID: 29247599 DOI: 10.1002/jbm.b.34048] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 11/04/2017] [Accepted: 11/12/2017] [Indexed: 12/19/2022]
Abstract
Despite the beneficial properties and outstanding potential of hydrogels for biomedical applications, several unmet challenges must be overcome, especially regarding to their known sensitivity to conventional sterilization methods. It is crucial for any biomaterial to withstand an efficient sterilization to obtain approval from regulatory organizations and to safely proceed to clinical trials. Sterility assurance minimizes the incidence of medical device-related infections, which still constitute a major concern in health care. In this review, we provide a detailed and comprehensive description of the published work from the past decade regarding the effects of sterilization on different types of hydrogels for biomedical applications. Advances in hydrogel production methods with simultaneous sterilization are also reported. Terminal sterilization methods can induce negative or positive effects on several material properties (e.g., aspect, size, color, chemical structure, mechanical integrity, and biocompatibility). Due to the complexity of factors involved (e.g., material properties, drug stability, sterilization conditions, and parameters), it is important to note the virtual impossibility of predicting the outcome of sterilization methods to determine a set of universal rules. Each system requires case-by-case testing to select the most suitable, effective method that allows for the main properties to remain unaltered. The impact of sterilization methods on the intrinsic properties of these systems is understudied, and further research is needed. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 2472-2492, 2018.
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Affiliation(s)
- Raquel Galante
- Departamento de Farmácia, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Butantã, São Paulo, Brazil.,Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Terezinha J A Pinto
- Departamento de Farmácia, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Butantã, São Paulo, Brazil
| | - Rogério Colaço
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal.,Departamento de Engenharia Mecânica and IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Ana Paula Serro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal.,Centro de Investigação Interdisciplinar Egas Moniz, Instituto Superior de Ciências da Saúde Egas Moniz, Quinta da Granja, Monte de Caparica, Caparica, Portugal
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Han A, Tsoi JKH, Matinlinna JP, Zhang Y, Chen Z. Effects of different sterilization methods on surface characteristics and biofilm formation on zirconia in vitro. Dent Mater 2017; 34:272-281. [PMID: 29183674 DOI: 10.1016/j.dental.2017.11.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 09/01/2017] [Accepted: 11/09/2017] [Indexed: 12/26/2022]
Abstract
OBJECTIVE The current laboratory study was to investigate the effect of different sterilization treatments on surface characteristics of zirconia, and biofilm formation on zirconia surface after exposure to these sterilization treatments. METHODS Commercially available zirconia discs (Cerconbase, Degu-Dent, Hanau, Germany) were prepared and polished to the same value of surface roughness. The discs were treated with one of the following sterilization methods steam autoclave sterilization, dry heat sterilization, ultraviolet C (UVC) irradiation, and gamma (γ) ray irradiation. The characteristics of zirconia surfaces were evaluated by scanning electron microscopy (SEM), surface roughness, surface free energy (SFE), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) measurements. Then, Staphylococcus aureus (S.a.) and Porphyromonas gingivalis (P.g.) bacteria were used and cultured on the respective sterilized zirconia surfaces. The amount of biofilm formation on zirconia surface was quantified by colony forming unit (CFU) counts. RESULTS Significant modifications were detected on the colour and SFE of zirconia. The colour of zirconia samples after UVC irradiation became light yellow whilst dark brown colour was observed after gamma ray irradiation. Moreover, UVC and gamma ray irradiation increased the hydrophilicity of zirconia surface. Overall, dry heat sterilized samples showed the significantly lowest amount of bacteria growth on zirconia, while UVC and gamma ray irradiation resulted in the highest. SIGNIFICANCE It is evident that various sterilization methods could change the surface which contribute to different biofilm formation and colour on zirconia.
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Affiliation(s)
- Aifang Han
- Dental Materials Science, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China; Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, PR China
| | - James K H Tsoi
- Dental Materials Science, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.
| | - Jukka P Matinlinna
- Dental Materials Science, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China
| | - Yu Zhang
- Department of Biomaterials & Biomimetics, New York University College of Dentistry, New York, USA
| | - Zhuofan Chen
- Dental Materials Science, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China; Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, PR China.
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Scognamiglio F, Blanchy M, Borgogna M, Travan A, Donati I, Bosmans J, Foulc M, Bouvy N, Paoletti S, Marsich E. Effects of supercritical carbon dioxide sterilization on polysaccharidic membranes for surgical applications. Carbohydr Polym 2017; 173:482-488. [DOI: 10.1016/j.carbpol.2017.06.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 04/21/2017] [Accepted: 06/07/2017] [Indexed: 01/01/2023]
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André CB, Dos Santos A, Pfeifer CS, Giannini M, Girotto EM, Ferracane JL. Evaluation of three different decontamination techniques on biofilm formation, and on physical and chemical properties of resin composites. J Biomed Mater Res B Appl Biomater 2017; 106:945-953. [PMID: 28440891 DOI: 10.1002/jbm.b.33907] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 03/27/2017] [Accepted: 04/13/2017] [Indexed: 12/29/2022]
Abstract
OBJECTIVES This study evaluated three different sterilization/disinfection techniques for resin composites on bacterial growth and surface modification after decontamination. METHODS Two resin composites were sterilized/disinfected with three different techniques: UV light, 1% chloramine T, and 70% ethanol. Four different times were used for each technique to determine the shortest time that the solution or UV light was effective. The influence of sterilization/disinfection technique on bacterial growth was evaluated by analyzing the metabolic activity, using the AlamarBlue™ assay, bacterial viability, and SEM images from biofilms of Streptococcus mutans. The surface change, after the process, was analyzed with ATR/FTIR and SEM images. The solutions used for decontamination (1% chloramine-T and 70% ethanol) were analyzed with 1 H-NMR to identify any resin compounds leached during the process. RESULTS One minute of decontamination was efficient for all three methods tested. Chloramine-T increased the surface porosity on resin composites, no changes were observed for UV light and 70% ethanol, however, 1 H-NMR identified leached monomers only when 70% ethanol was used. No chemical change of the materials was found under ATR/FTIR analyses after the decontamination process. Chloramine-T, with no previous wash, increased the bacterial viability for both resin composites and increased the bacterial metabolism for the resin composite without fluoride. CONCLUSION UV light had no interference on the resin composites properties tested using 1 min of exposure compared to the other decontamination methods. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 945-953, 2018.
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Affiliation(s)
- Carolina Bosso André
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Campinas, Brazil
| | - Andressa Dos Santos
- Department of Chemistry, School of Chemistry, State University of Maringá, Maringá, Brazil
| | - Carmem Silvia Pfeifer
- Department of Dental Materials, School of Dentistry, Oregon Health and Science University, Portland, Oregon
| | - Marcelo Giannini
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Campinas, Brazil
| | | | - Jack Liborio Ferracane
- Department of Dental Materials, School of Dentistry, Oregon Health and Science University, Portland, Oregon
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Yu H, Cauchois G, Schmitt JF, Louvet N, Six JL, Chen Y, Rahouadj R, Huselstein C. Is there a cause-and-effect relationship between physicochemical properties and cell behavior of alginate-based hydrogel obtained after sterilization? J Mech Behav Biomed Mater 2017; 68:134-143. [DOI: 10.1016/j.jmbbm.2017.01.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 01/21/2017] [Accepted: 01/24/2017] [Indexed: 11/25/2022]
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Ghobeira R, Philips C, Declercq H, Cools P, De Geyter N, Cornelissen R, Morent R. Effects of different sterilization methods on the physico-chemical and bioresponsive properties of plasma-treated polycaprolactone films. Biomed Mater 2017; 12:015017. [DOI: 10.1088/1748-605x/aa51d5] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Iñiguez-Franco F, Auras R, Burgess G, Holmes D, Fang X, Rubino M, Soto-Valdez H. Concurrent solvent induced crystallization and hydrolytic degradation of PLA by water-ethanol solutions. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.07.018] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Chaves C, Alshomer F, Palgrave RG, Kalaskar DM. Plasma Surface Modification of Polyhedral Oligomeric Silsequioxane-Poly(carbonate-urea) Urethane with Allylamine Enhances the Response and Osteogenic Differentiation of Adipose-Derived Stem Cells. ACS APPLIED MATERIALS & INTERFACES 2016; 8:18701-18709. [PMID: 27384590 DOI: 10.1021/acsami.6b05788] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This study present amino functionalization of biocompatible polymer polyhedral oligomeric silsequioxane-poly(carbonate-urea) urethane (POSS-PCU) using plasma polymerization process to induce osteogenic differentiation of adipose derived stem cells (ADSCs). Optimization of plasma polymerization process was carried out keeping cell culture application in mind. Thus, samples were rigorously tested for retention of amino groups under both dry and wet conditions. Physio-chemical characterization was carried out using ninhydrin test, X-ray photon spectroscopy, scanning electron microscopy, and static water contact analysis. Results from physio chemical characterization shows that functionalization of the amino group is not stable under wet conditions and optimization of plasma process is required for stable bonding of amino groups to the POSS-PCU polymer. Optimized samples were later tested in vitro in short and long-term culture to study differentiation of ADSCs on amino modified samples. Short-term cell culture shows that initial cell attachment was significantly (p < 0.001) improved on amine modified samples (NH2-POSS-PCU) compared to unmodified POSS-PCU. NH2-POSS-PCU samples also facilitates osteogenic differentiation of ADSCs as confirmed by immunological staining of cells for extracellular markers such as collagen Type I and osteopontin. Quantification of total collagen and ALP activity also shows significant (p < 0.001) increase on NH2-POSS-PCU samples compared to unmodified POSS-PCU. A pilot study also confirms that these optimized amino modified POSS-PCU samples can further be functionalized using bone inducing peptide such as KRSR using conventional wet chemistry. This further provides an opportunity for biofunctionalization of the polymer for various tissue specific applications.
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Affiliation(s)
- Camilo Chaves
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London , London, United Kingdom , NW3 2PF
- Université Paris Sud , Orthopedic Surgery, Hôpital Saint Antoine, 184, Rue du Faubourg-Saint-Antoine, Paris, France , 75012
| | - Feras Alshomer
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London , London, United Kingdom , NW3 2PF
| | - Robert G Palgrave
- Department of Chemistry, University College London , 20 Gordon Street, London, United Kingdom , WC1H 0AJ
| | - Deepak M Kalaskar
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London , London, United Kingdom , NW3 2PF
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Grasman JM, O’Brien MP, Ackerman K, Gagnon KA, Wong GM, Pins GD. The Effect of Sterilization Methods on the Structural and Chemical Properties of Fibrin Microthread Scaffolds. Macromol Biosci 2016; 16:836-46. [PMID: 26847494 PMCID: PMC4902748 DOI: 10.1002/mabi.201500410] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 01/02/2016] [Indexed: 01/13/2023]
Abstract
A challenge for the design of scaffolds in tissue engineering is to determine a terminal sterilization method that will retain the structural and biochemical properties of the materials. Since commonly used heat and ionizing energy-based sterilization methods have been shown to alter the material properties of protein-based scaffolds, the effects of ethanol and ethylene oxide (EtO) sterilization on the cellular compatibility and the structural, chemical, and mechanical properties of uncrosslinked, UV crosslinked, or 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) crosslinked fibrin microthreads in neutral (EDCn) or acidic (EDCa) buffers are evaluated. EtO sterilization significantly reduces the tensile strength of uncrosslinked microthreads. Surface chemistry analyses show that EtO sterilization induces alkylation of EDCa microthreads leading to a significant reduction in myoblast attachment. The material properties of EDCn microthreads do not appear to be affected by the sterilization method. These results significantly enhance the understanding of how sterilization or crosslinking techniques affect the material properties of protein scaffolds.
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Affiliation(s)
- Jonathan M. Grasman
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, 01609, USA. Bioengineering Institute, Worcester Polytechnic Institute, Worcester, MA, 01609, USA. Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA
| | - Megan P. O’Brien
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, 01609, USA
| | - Kevin Ackerman
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, 01609, USA
| | - Keith A. Gagnon
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, 01609, USA. Boston University School of Medicine, Boston, MA, 02119, USA. Department of Biomedical Engineering, Boston University, Boston, MA, 02215, USA
| | - Gregory M. Wong
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, 01609, USA. Department of Geosciences, Pennsylvania State University, University Park, PA, 16802, USA
| | - George D. Pins
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, 01609, USA. Bioengineering Institute, Worcester Polytechnic Institute, Worcester, MA, 01609, USA
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Crowley C, Klanrit P, Butler CR, Varanou A, Platé M, Hynds RE, Chambers RC, Seifalian AM, Birchall MA, Janes SM. Surface modification of a POSS-nanocomposite material to enhance cellular integration of a synthetic bioscaffold. Biomaterials 2016; 83:283-93. [PMID: 26790147 PMCID: PMC4762251 DOI: 10.1016/j.biomaterials.2016.01.005] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 12/27/2015] [Accepted: 01/01/2016] [Indexed: 12/20/2022]
Abstract
Polyhedral oligomeric silsesquioxane poly(carbonate-urea) urethane (POSS-PCU) is a versatile nanocomposite biomaterial with growing applications as a bioscaffold for tissue engineering. Integration of synthetic implants with host tissue can be problematic but could be improved by topographical modifications. We describe optimization of POSS-PCU by dispersion of porogens (sodium bicarbonate (NaHCO3), sodium chloride (NaCl) and sucrose) onto the material surface, with the principle aim of increasing surface porosity, thus providing additional opportunities for improved cellular and vascular ingrowth. We assess the effect of the porogens on the material's mechanical strength, surface chemistry, wettability and cytocompatibilty. Surface porosity was characterized by scanning electron microscopy (SEM). There was no alteration in surface chemistry and wettability and only modest changes in mechanical properties were detected. The size of porogens correlated well with the porosity of the construct produced and larger porogens improved interconnectivity of spaces within constructs. Using primary human bronchial epithelial cells (HBECs) we demonstrate moderate in vitro cytocompatibility for all surface modifications; however, larger pores resulted in cellular aggregation. These cells were able to differentiate on POSS-PCU scaffolds. Implantation of the scaffold in vivo demonstrated that larger pore sizes favor cellular integration and vascular ingrowth. These experiments demonstrate that surface modification with large porogens can improve POSS-PCU nanocomposite scaffold integration and suggest the need to strike a balance between the non-porous surfaces required for epithelial coverage and the porous structure required for integration and vascularization of synthetic scaffolds in future construct design.
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Affiliation(s)
- Claire Crowley
- Lungs for Living Research Centre, UCL Respiratory, University College London, London, UK; UCL Centre of Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, Royal Free London NHS Foundation Trust Hospital and University College London, London, UK
| | - Poramate Klanrit
- UCL Centre of Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, Royal Free London NHS Foundation Trust Hospital and University College London, London, UK
| | - Colin R Butler
- Lungs for Living Research Centre, UCL Respiratory, University College London, London, UK
| | - Aikaterini Varanou
- Lungs for Living Research Centre, UCL Respiratory, University College London, London, UK
| | - Manuela Platé
- Lungs for Living Research Centre, UCL Respiratory, University College London, London, UK; Centre for Inflammation and Tissue Repair, UCL Respiratory, University College London, London, UK
| | - Robert E Hynds
- Lungs for Living Research Centre, UCL Respiratory, University College London, London, UK
| | - Rachel C Chambers
- Centre for Inflammation and Tissue Repair, UCL Respiratory, University College London, London, UK
| | - Alexander M Seifalian
- UCL Centre of Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, Royal Free London NHS Foundation Trust Hospital and University College London, London, UK
| | - Martin A Birchall
- UCL Ear Institute, Royal National Throat Nose and Ear Hospital and University College London, London, UK.
| | - Sam M Janes
- Lungs for Living Research Centre, UCL Respiratory, University College London, London, UK.
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Naderi N, Griffin M, Malins E, Becer R, Mosahebi A, Whitaker IS, Seifalian AM. Slow chlorine releasing compounds: A viable sterilisation method for bioabsorbable nanocomposite biomaterials. J Biomater Appl 2015; 30:1114-24. [DOI: 10.1177/0885328215613666] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Objective Selection of the appropriate sterilisation method for biodegradable materials has been a challenging task. Many conventional sterilisation methods are not suitable for the next generation of biomaterials, mainly due to their complex composition, based on nanomaterials, often incorporating bioactive moieties. In this study, we investigate sterilisation efficacy of slow chlorine releasing compound sodium dichloroisocyanurate dihydrate (SDIC) for polyhedral oligomeric silsesquioxane (POSS)-poly(caprolactone urea-urethane) (PCL) scaffolds in comparison with conventional sterilisation methods. Methods POSS-PCL scaffolds were subjected to 70% ethanol, UV, and SDIC sterilisation methods. Samples were immersed in tryptone soya broth (TSB) and thioglycollate medium (THY) and after seven days visually inspected for signs of microbial growth. Bulk and surface properties and molecular weight distribution profiles of the scaffolds after sterilization were investigated using FTIR analysis, surface hydrophilicity, scanning electron microscopy analysis, tensile strength testing, and gel-permeation chromatography (GPC). Adipose-derived stem cells (ADSC) were seeded on the scaffolds and AlamarBlue® viability assay was performed to investigate cell metabolic activity. Confocal imaging of rhodamine phalloidin and Dapi stained ADSC on scaffolds was used to demonstrate cell morphology. Results GPC results showed that autoclaving led to a significant decrease in the molecular weight of POSS-PCL, whereas ethanol caused visible deformation of the polymer 3D structure and UV radiation did not effectively sterilise the scaffolds. AlamarBlue® analysis showed metabolic activity close to that of tissue culture plastic for ethanol and SDIC. Conclusion SDIC sterilisation can be safely applied to biodegradable scaffolds unsuitable for the more common sterilisation methods.
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Affiliation(s)
- Naghmeh Naderi
- Reconstructive Surgery & Regenerative Medicine Group, Institute of Life Sciences (ILS), Swansea University Medical School, Swansea, UK
- Welsh Centre for Burns & Plastic Surgery, ABMU Health Board, Swansea, UK
- UCL Centre for Nanotechnology & Regenerative Medicine, University College London, Royal Free London NHS Foundation Trust, London, UK
| | - Michelle Griffin
- UCL Centre for Nanotechnology & Regenerative Medicine, University College London, Royal Free London NHS Foundation Trust, London, UK
| | - Edward Malins
- Polymer Chemistry Laboratory, School of Engineering and Materials Science, Queen Mary, University of London, London, UK
| | - Remzi Becer
- Polymer Chemistry Laboratory, School of Engineering and Materials Science, Queen Mary, University of London, London, UK
| | - Afshin Mosahebi
- Department of Plastic Surgery, Royal Free London NHS Foundation Trust, London, UK
| | - Iain S Whitaker
- Reconstructive Surgery & Regenerative Medicine Group, Institute of Life Sciences (ILS), Swansea University Medical School, Swansea, UK
- Welsh Centre for Burns & Plastic Surgery, ABMU Health Board, Swansea, UK
| | - Alexander M Seifalian
- UCL Centre for Nanotechnology & Regenerative Medicine, University College London, Royal Free London NHS Foundation Trust, London, UK
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36
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Zhao J, Farhatnia Y, Kalaskar DM, Zhang Y, Bulter PE, Seifalian AM. The influence of porosity on the hemocompatibility of polyhedral oligomeric silsesquioxane poly (caprolactone-urea) urethane. Int J Biochem Cell Biol 2015; 68:176-86. [DOI: 10.1016/j.biocel.2015.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Revised: 07/28/2015] [Accepted: 08/11/2015] [Indexed: 10/23/2022]
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Controllable degradation kinetics of POSS nanoparticle-integrated poly(ε-caprolactone urea)urethane elastomers for tissue engineering applications. Sci Rep 2015; 5:15040. [PMID: 26463421 PMCID: PMC4604490 DOI: 10.1038/srep15040] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 09/07/2015] [Indexed: 01/28/2023] Open
Abstract
Biodegradable elastomers are a popular choice for tissue engineering scaffolds, particularly in mechanically challenging settings (e.g. the skin). As the optimal rate of scaffold degradation depends on the tissue type to be regenerated, next-generation scaffolds must demonstrate tuneable degradation patterns. Previous investigations mainly focussed on the integration of more or less hydrolysable components to modulate degradation rates. In this study, however, the objective was to develop and synthesize a family of novel biodegradable polyurethanes (PUs) based on a poly(ε-caprolactone urea)urethane backbone integrating polyhedral oligomeric silsesquioxane (POSS-PCLU) with varying amounts of hard segments (24%, 28% and 33% (w/v)) in order to investigate the influence of hard segment chemistry on the degradation rate and profile. PUs lacking POSS nanoparticles served to prove the important function of POSS in maintaining the mechanical structures of the PU scaffolds before, during and after degradation. Mechanical testing of degraded samples revealed hard segment-dependent modulation of the materials’ viscoelastic properties, which was attributable to (i) degradation-induced changes in the PU crystallinity and (ii) either the presence or absence of POSS. In conclusion, this study presents a facile method of controlling degradation profiles of PU scaffolds used in tissue engineering applications.
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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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Dai Y, Xia Y, Chen HB, Li N, Chen G, Zhang FM, Gu N. Optimization of sterilization methods for electrospun poly(ε-caprolactone) to enhance pre-osteoblast cell behaviors for guided bone regeneration. J BIOACT COMPAT POL 2015. [DOI: 10.1177/0883911515598795] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The aim of this study was to determine the optimal sterilization procedure for biodegradable polyester-based guided bone regeneration membranes. The effects of sterilization using low-temperature hydrogen peroxide gas plasma, 75% ethanol (EtOH; two soaking times), and ultraviolet radiation on the structure and biological properties of electrospun poly(ε-caprolactone) membranes were investigated. The results demonstrated that all were effective sterilization methods. The membranes were then assessed for surface structure, wettability, and in vitro cellular responses including osteogenic differentiation by seeding with pre-osteoblasts (MC3T3-E1 cells). The cells grew well on all the sterilized membranes. The low-temperature hydrogen peroxide gas plasma–sterilized membranes, which exhibited significantly improved hydrophilicity ( p < 0.05), were better for cell osteogenic differentiation compared to the membranes sterilized by other methods. In addition, the cell behavior on the membranes sterilized by EtOH was superior to those sterilized by ultraviolet radiation. Finally, EtOH soaking time appeared to influence cell behavior. The results suggested that low-temperature hydrogen peroxide gas plasma treatment is the most promising method to sterilize electrospun poly(ε-caprolactone) membranes for guided bone regeneration.
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Affiliation(s)
- Yun Dai
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yang Xia
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing, China
| | - Han-Bang Chen
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
| | - Na Li
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
| | - Gang Chen
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
| | - Fei-Min Zhang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Suzhou Key Laboratory of Biomaterials and Technologies & Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou, China
| | - Ning Gu
- Suzhou Key Laboratory of Biomaterials and Technologies & Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou, China
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Li G, Kong Y, Zhao Y, Zhao Y, Zhang L, Yang Y. Fabrication and characterization of polyacrylamide/silk fibroin hydrogels for peripheral nerve regeneration. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2015; 26:899-916. [DOI: 10.1080/09205063.2015.1066109] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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41
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Improved Sterilization of Sensitive Biomaterials with Supercritical Carbon Dioxide at Low Temperature. PLoS One 2015; 10:e0129205. [PMID: 26067982 PMCID: PMC4466598 DOI: 10.1371/journal.pone.0129205] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 05/06/2015] [Indexed: 11/19/2022] Open
Abstract
The development of bio-resorbable implant materials is rapidly going on. Sterilization of those materials is inevitable to assure the hygienic requirements for critical medical devices according to the medical device directive (MDD, 93/42/EG). Biopolymer-containing biomaterials are often highly sensitive towards classical sterilization procedures like steam, ethylene oxide treatment or gamma irradiation. Supercritical CO2 (scCO2) treatment is a promising strategy for the terminal sterilization of sensitive biomaterials at low temperature. In combination with low amounts of additives scCO2 treatment effectively inactivates microorganisms including bacterial spores. We established a scCO2 sterilization procedure under addition of 0.25% water, 0.15% hydrogen peroxide and 0.5% acetic anhydride. The procedure was successfully tested for the inactivation of a wide panel of microorganisms including endospores of different bacterial species, vegetative cells of gram positive and negative bacteria including mycobacteria, fungi including yeast, and bacteriophages. For robust testing of the sterilization effect with regard to later application of implant materials sterilization all microorganisms were embedded in alginate/agarose cylinders that were used as Process Challenge Devices (PCD). These PCD served as surrogate models for bioresorbable 3D scaffolds. Furthermore, the impact of scCO2 sterilization on mechanical properties of polysaccharide-based hydrogels and collagen-based scaffolds was analyzed. The procedure was shown to be less compromising on mechanical and rheological properties compared to established low-temperature sterilization methods like gamma irradiation and ethylene oxide exposure as well as conventional steam sterilization. Cytocompatibility of alginate gels and scaffolds from mineralized collagen was compared after sterilization with ethylene oxide, gamma irradiation, steam sterilization and scCO2 treatment. Human mesenchymal stem cell viability and proliferation were not compromised by scCO2 treatment of these materials and scaffolds. We conclude that scCO2 sterilization under addition of water, hydrogen peroxide and acetic anhydride is a very effective, gentle, non-cytotoxic and thus a promising alternative sterilization method especially for biomaterials.
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42
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Effect of sterilization techniques prior to antimicrobial testing on physical properties of dental restorative materials. J Dent 2015; 43:703-14. [DOI: 10.1016/j.jdent.2015.03.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Revised: 03/23/2015] [Accepted: 03/27/2015] [Indexed: 11/19/2022] Open
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43
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The effect of steam sterilization on recombinant spider silk particles. Int J Pharm 2015; 481:125-31. [PMID: 25596418 DOI: 10.1016/j.ijpharm.2015.01.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 01/12/2015] [Accepted: 01/13/2015] [Indexed: 11/20/2022]
Abstract
In this work, the recombinant spider silk protein eADF4(C16) was used to fabricate particles in the submicron range using a micromixing method. Furthermore, particles in the micrometer range were produced using an ultrasonic atomizer system. Both particle species were manufactured by an all-aqueous process. The submicroparticles were 332 nm in average diameter, whereas 6.70 μm was the median size of the microparticles. Both particle groups showed a spherical shape and exhibited high β-sheet content in secondary structure. Submicro- and microparticles were subsequently steam sterilized and investigated with respect to particle size, secondary structure and thermal stability. Sterilization temperature and time were increased to assess the thermal stability of eADF4(C16) particles. Actually, particles remained stable and their properties did not change even after autoclaving at 134°C. Both, the untreated and the autoclaved submicroparticles showed no overt cytotoxicity on human dermal fibroblasts after incubation for 72 h. The eADF4(C16) particles were already loaded with proteins and small molecules in previous studies. With that, we can provide a highly promising parenteral drug delivery system based on a defined polypeptide carrier, manufactured with an all-aqueous process and being fully sterilizable.
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Rahimi N, Swennen G, Verbruggen S, Scibiorek M, Molin DG, Post MJ. Short stimulation of electro-responsive PAA/fibrin hydrogel induces collagen production. Tissue Eng Part C Methods 2014; 20:703-13. [PMID: 24341313 DOI: 10.1089/ten.tec.2013.0596] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Acrylic acid/fibrin hydrogel can mechanically stimulate cells when an external electrical field is applied, enabling them to migrate and align throughout the depth of the gel. The ability of electro-responsive polyacrylic acid (PAA)/fibrin hydrogel to promote collagen production and remodeling has been investigated by three-dimensional (3D) culturing and conditioning of smooth muscle cells (SMCs). SMCs-seeded hydrogels were subjected to an alternating electrical field (0.06 V/mm) for 2 h for one, two, or three times per week during 4 weeks of culturing. Fluorescent images of collagen structure and accumulation, assessed by CNA-35 probe, showed increased collagen content (>100-fold at 1× stimulation/week) in the center of the hydrogels after 4 weeks of culture. The increase in collagen production correlated with increasing extracellular matrix gene expression and resulted in significantly improved mechanical properties of the stimulated hydrogels. Matrix metalloproteinase (MMP)-2 activity was also significantly enhanced by stimulation, which probably has a role in the reorganization of the collagen. Short stimulation (2 h) induced a favorable response in the cells and enhanced tissue formation and integrity of the scaffold by inducing collagen production. The presented set up could be used for conditioning and improving the functionality of current tissue-engineered vascular grafts.
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Affiliation(s)
- Nastaran Rahimi
- 1 Department of Physiology, Maastricht University , Maastricht, The Netherlands
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45
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Guasti L, Vagaska B, Bulstrode NW, Seifalian AM, Ferretti P. Chondrogenic differentiation of adipose tissue-derived stem cells within nanocaged POSS-PCU scaffolds: A new tool for nanomedicine. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2014; 10:279-89. [DOI: 10.1016/j.nano.2013.08.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Revised: 08/19/2013] [Accepted: 08/22/2013] [Indexed: 02/06/2023]
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46
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de Mel A, Ramesh B, Scurr DJ, Alexander MR, Hamilton G, Birchall M, Seifalian AM. Fumed Silica Nanoparticle Mediated Biomimicry for Optimal Cell-Material Interactions for Artificial Organ Development. Macromol Biosci 2013; 14:307-13. [DOI: 10.1002/mabi.201300382] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2013] [Revised: 09/20/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Achala de Mel
- UCL Centre for Nanotechnology and Regenerative Medicine; University College London; London UK
- Division of Surgery and Interventional Science; London UK
| | - Bala Ramesh
- UCL Centre for Nanotechnology and Regenerative Medicine; University College London; London UK
- Division of Surgery and Interventional Science; London UK
| | - David J. Scurr
- Laboratory of Biophysics and Surface Analysis; School of Pharmacy; University of Nottingham; Nottingham NG7 2RD UK
| | - Morgan R. Alexander
- Laboratory of Biophysics and Surface Analysis; School of Pharmacy; University of Nottingham; Nottingham NG7 2RD UK
| | - George Hamilton
- Division of Surgery and Interventional Science; London UK
- Royal Free London NHS Foundation Trust Hospital; London UK
| | - Martin Birchall
- UCL Centre for Nanotechnology and Regenerative Medicine; University College London; London UK
- UCL Ear Institute; Royal National Throat; Nose and Ear Hospital; London UK
| | - Alexander M. Seifalian
- UCL Centre for Nanotechnology and Regenerative Medicine; University College London; London UK
- Division of Surgery and Interventional Science; London UK
- Royal Free London NHS Foundation Trust Hospital; London UK
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