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Kara F, Aksoy EA, Aksoy S, Hasirci N. Coating of silver nanoparticles on polyurethane film surface by green chemistry approach and investigation of antibacterial activity against S. epidermidis. J BIOACT COMPAT POL 2022. [DOI: 10.1177/08839115221098056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Silver nanoparticles with potential antibacterial properties are included in biomaterials for the production of medical devices, which are used for diagnoses or treatment purposes. The aim of the current study was coating the polyurethane (PU) films with silver nanoparticles (AgNPs) due to their antibacterial efficacy. PU films were first modified by chitosan (CH), treated with AgNO3 to let CH chelate with silver ions, and then treated with vitamin-C (vit C) or glucose (Glu) to reduce the adsorbed ions to atomic silver to form AgNPs. The surfaces of the films were examined by ATR-FTIR, XPS, XRD, and SEM. Chemical bond formation between CH and Ag ions and AgNPs were determined by ATR-FTIR. Meanwhile, XPS and SEM analyses proved the presence of reduced metallic silver and nanoparticles on the film surfaces, respectively. According to the SEM analyses, a homogeneous distribution of AgNPs, with sizes 99–214 nm and 37–54 nm, on the film surfaces were obtained depending on Glu or vit C reduction, respectively. The films presented excellent antibacterial performance against Gram positive Staphylococcus epidermidis ( S. epidermidis). These results suggested that the mentioned green technology can be easily applied to obtain AgNP coated polymeric surfaces with very high antibacterial efficacy. Although there are some studies dealing with AgNP formation on PU sponges or fibers, to the best of our knowledge, this is the first study showing AgNP formation on the CH conjugated PU films.
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Affiliation(s)
- Filiz Kara
- Department of Industrial Engineering, Faculty of Engineering, Başkent University, Ankara, Turkey
| | - Eda Ayse Aksoy
- Department of Basic Pharmaceutical Sciences, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
- Department of Polymer Science and Technology, Institute for Graduate Studies in Science and Engineering, Hacettepe University, Ankara, Turkey
| | - Serpil Aksoy
- Department of Chemistry, Faculty of Science, Gazi University, Ankara, Turkey
| | - Nesrin Hasirci
- Department of Chemistry, Middle East Technical University (METU), Ankara, Turkey
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University (METU), Ankara, Turkey
- Near East University, Tissue Engineering and Biomaterial Research Center, Nicosia, TRNC, Mersin 10, Turkey
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Tamay DG, Hasirci N. Bioinks-materials used in printing cells in designed 3D forms. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2021; 32:1072-1106. [PMID: 33720806 DOI: 10.1080/09205063.2021.1892470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Use of materials to activate non-functional or damaged organs and tissues goes back to early ages. The first materials used for this purpose were metals, and in time, novel materials such as ceramics, polymers and composites were introduced to the field to serve in medical applications. In the last decade, the advances in material sciences, cell biology, technology and engineering made 3D printing of living tissues or organ models in the designed structure and geometry possible by using cells alone or together with hydrogels through additive manufacturing. This review aims to give a brief information about the chemical structures and properties of bioink materials and their applications in the production of 3D tissue constructs.
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Affiliation(s)
- Dilara Goksu Tamay
- BIOMATEN - Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey.,Department of Biomedical Engineering, Middle East Technical University, Ankara, Turkey
| | - Nesrin Hasirci
- BIOMATEN - Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey.,Department of Biomedical Engineering, Middle East Technical University, Ankara, Turkey.,Department of Chemistry, Middle East Technical University, Ankara, Turkey.,Tissue Engineering and Biomaterial Research Center, Near East University, TRNC, Mersin 10, Turkey
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Mohammadi M, Mousavi Shaegh SA, Alibolandi M, Ebrahimzadeh MH, Tamayol A, Jaafari MR, Ramezani M. Micro and nanotechnologies for bone regeneration: Recent advances and emerging designs. J Control Release 2018; 274:35-55. [PMID: 29410062 DOI: 10.1016/j.jconrel.2018.01.032] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 01/29/2018] [Accepted: 01/30/2018] [Indexed: 02/08/2023]
Abstract
Treatment of critical-size bone defects is a major medical challenge since neither the bone tissue can regenerate nor current regenerative approaches are effective. Emerging progresses in the field of nanotechnology have resulted in the development of new materials, scaffolds and drug delivery strategies to improve or restore the damaged tissues. The current article reviews promising nanomaterials and emerging micro/nano fabrication techniques for targeted delivery of biomolecules for bone tissue regeneration. In addition, recent advances in fabrication of bone graft substitutes with similar properties to normal tissue along with a brief summary of current commercialized bone grafts have been discussed.
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Affiliation(s)
- Marzieh Mohammadi
- Nanotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Ali Mousavi Shaegh
- Orthopedic Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Clinical Research Unit, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mona Alibolandi
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Ali Tamayol
- Department of Mechanical and Materials Engineering, University of Nebraska, Lincoln, Lincoln, NE 68588, USA; Biomaterials Innovation Research Center, Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA
| | - Mahmoud Reza Jaafari
- Nanotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Mohammad Ramezani
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.
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Sivashankari PR, Prabaharan M. Prospects of chitosan-based scaffolds for growth factor release in tissue engineering. Int J Biol Macromol 2016; 93:1382-1389. [PMID: 26899174 DOI: 10.1016/j.ijbiomac.2016.02.043] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 02/12/2016] [Accepted: 02/14/2016] [Indexed: 11/24/2022]
Abstract
Tissue engineering is concerned about the rejuvenation and restoration of diseased and damages tissues/organs using man-made scaffolds that mimic the native environment of the cells. In recent years, a variety of biocompatible and biodegradable natural materials is employed for the fabrication of such scaffolds. Of these natural materials, chitosan is the most preferred one as it imitates the extracellular matrix (ECM) of the cells. Moreover, chitosan-based materials are pro-angiogenic and have antibacterial activity. These materials can be easily fabricated into the desired shape of the scaffolds that are suitable for tissue support and regeneration. Growth factors are small proteins/peptides that support and enhance the growth and differentiation of cells into a specific lineage. It has been observed that scaffolds capable of delivering growth factor promote tissue repair and regeneration at a faster rate when compared to scaffolds without growth factor. The present review focuses on the recent developments on chitosan-based scaffolds for the delivery of growth factors thereby improving and enhancing tissue regeneration.
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Affiliation(s)
- P R Sivashankari
- Department of Chemistry, Hindustan Institute of Technology and Science, Padur, Chennai 603 103, India
| | - M Prabaharan
- Department of Chemistry, Hindustan Institute of Technology and Science, Padur, Chennai 603 103, India.
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Modified chitosan scaffolds: Proliferative, cytotoxic, apoptotic, and necrotic effects on Saos-2 cells and antimicrobial effect on Escherichia coli. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911515627471] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Scaffolds used in tissue engineering applications should have high biocompatibility with minimum allergic, toxic, apoptotic, or necrotic effects on the growing cells and newly forming tissue and, if possible, have antimicrobial property to prevent infection at the host site. In this study, novel micro-fibrous chitosan scaffolds, having mineralized bioactive surface to enhance cell adhesion and a model antibiotic (gentamicin) to prevent bacterial attack, were prepared. The effects of the scaffolds on proliferation, viability, apoptosis, and necrosis of Saos-2 cells are reported for the first time. Wet spinning technique was used in the scaffold preparation and biomineralization was achieved by incubating them in five-time concentrated simulated body fluid for 2, 7, or 14 days (coded as CH-BM/2, CH-BM/7, and CH-BM/14, respectively). Gentamicin, an effectively used antibiotic in bone treatments, was loaded by vacuum-pressure cycle. Energy-dispersive X-ray results demonstrated that Ca/P ratio of the mineral phase varies depending on the incubation period. When the scaffolds were cultured with Saos-2 cells, cell adhesion and extracellular matrix formation occurred on all types of scaffolds. Alamar Blue cytotoxicity tests showed correlation among mineral concentration and cytotoxicity where CH-BM/2 had significantly more favorable properties. For all types of scaffolds, apoptosis and necrosis were less than 10%, meaning the samples are biocompatible. Gentamicin-loaded scaffolds showed high antimicrobial efficacy against Escherichia coli. The presence of mineral phase enhanced the adhesive capacity of cells and entrapment efficiency of antibiotic. These results suggest that the bioactive and antimicrobial scaffolds prepared in this study can act as promising matrices in bone tissue engineering applications.
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