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Tworek P, Rakowski K, Szota M, Lekka M, Jachimska B. Changes in Secondary Structure and Properties of Bovine Serum Albumin as a Result of Interactions with Gold Surface. Chemphyschem 2024; 25:e202300505. [PMID: 38009440 DOI: 10.1002/cphc.202300505] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 11/17/2023] [Accepted: 11/19/2023] [Indexed: 11/28/2023]
Abstract
Proteins can alter their shape when interacting with a surface. This study explores how bovine serum albumin (BSA) modifies structurally when it adheres to a gold surface, depending on the protein concentration and pH. We verified that the gold surface induces significant structural modifications to the BSA molecule using circular dichroism, infrared spectroscopy, and atomic force microscopy. Specifically, adsorbed molecules displayed increased levels of disordered structures and β-turns, with fewer α-helices than the native structure. MP-SPR spectroscopy demonstrated that the protein molecules preferred a planar orientation during adsorption. Molecular dynamics simulations revealed that the interaction between cysteines exposed to the outside of the molecule and the gold surface was vital, especially at pH=3.5. The macroscopic properties of the protein film observed by AFM and contact angles confirm the flexible nature of the protein itself. Notably, structural transformation is joined with the degree of hydration of protein layers.
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Affiliation(s)
- Paulina Tworek
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239, Krakow, Poland
| | - Kamil Rakowski
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239, Krakow, Poland
| | - Magdalena Szota
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239, Krakow, Poland
| | - Małgorzata Lekka
- Department of Biophysical Microstructures, Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, 31-342, Krakow, Poland
| | - Barbara Jachimska
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239, Krakow, Poland
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2
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Lee SS, Du X, Smit T, Bissacco EG, Seiler D, de Wild M, Ferguson SJ. 3D-printed LEGO®-inspired titanium scaffolds for patient-specific regenerative medicine. BIOMATERIALS ADVANCES 2023; 154:213617. [PMID: 37678088 DOI: 10.1016/j.bioadv.2023.213617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 08/08/2023] [Accepted: 09/02/2023] [Indexed: 09/09/2023]
Abstract
Despite the recent advances in 3D-printing, it is often difficult to fabricate implants that optimally fit a defect size or shape. There are some approaches to resolve this issue, such as patient-specific implant/scaffold designs based on CT images of the patients, however, this process is labor-intensive and costly. Especially in developing countries, affordable treatment options are required, while still not excluding these patient groups from potential material and manufacturing advances. Here, a selective laser melting (SLM) 3D-printing strategy was used to fabricate a hierarchical, LEGO®-inspired Assemblable Titanium Scaffold (ATS) system, which can be manually assembled in any shape or size with ease. A surgeon can quickly create a scaffold that would fit to the defect right before the implantation during the surgery. Additionally, the direct inclusion of micro- and macroporous structures via 3D-printing, as well as a double acid-etched surface treatment (ST) in the ATS, ensure biocompatibility, sufficient nutrient flow, cell migration and enhanced osteogenesis. Three different structures were designed (non-porous:NP, semi-porous:SP, ultra-porous:UP), 3D-printed with the SLM technique and then surface treated for the ST groups. After analyzing characteristics of the ATS such as printing quality, surface roughness and interconnected porosity, mechanical testing and finite element analysis (FEA) demonstrated that individual and stacked ATS have sufficient mechanical properties to withstand loading in a physiological system. All ATS showed high cell viability, and the SP and UP groups demonstrated enhanced cell proliferation rates compared to the NP group. Furthermore, we also verified that cells were well-attached and spread on the porous structures and successful cell migration between the ATS units was seen in the case of assemblies. The UP and SP groups exhibited higher calcium deposition and RT-qPCR proved higher osteogenic gene expression compared to NP group. Finally, we demonstrate a number of possible medical applications that reveal the potential of the ATS through assembly.
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Affiliation(s)
- Seunghun S Lee
- Institute for Biomechanics, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland.
| | - Xiaoyu Du
- Institute for Biomechanics, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Thijs Smit
- Institute for Biomechanics, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Elisa G Bissacco
- Institute for Biomechanics, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Daniel Seiler
- Institute for Medical Engineering and Medical Informatics IM(2), FHNW, Muttenz, Switzerland
| | - Michael de Wild
- Institute for Medical Engineering and Medical Informatics IM(2), FHNW, Muttenz, Switzerland
| | - Stephen J Ferguson
- Institute for Biomechanics, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
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3
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Liu Z, Wang R, Liu W, Liu Y, Feng X, Zhao F, Chen P, Shao L, Rong M. Recent advances in the application and biological mechanism of silicon nitride osteogenic properties: a review. Biomater Sci 2023; 11:7003-7017. [PMID: 37718623 DOI: 10.1039/d3bm00877k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2023]
Abstract
Silicon nitride, an emerging bioceramic material, is highly sought after in the biomedical industry due to its osteogenesis-promoting properties, which are a result of its unique surface chemistry and excellent mechanical properties. Currently, it is used in clinics as an orthopedic implant material. The osteogenesis-promoting properties of silicon nitride are manifested in its contribution to the formation of a local osteogenic microenvironment, wherein silicon nitride and its hydrolysis products influence osteogenesis by modulating the biological behaviors of the constituents of the osteogenic microenvironment. In particular, silicon nitride regulates redox signaling, cellular autophagy, glycolysis, and bone mineralization in cells involved in bone formation via several mechanisms. Moreover, it may also promote osteogenesis by influencing immune regulation and angiogenesis. In addition, the wettability, surface morphology, and charge of silicon nitride play crucial roles in regulating its osteogenesis-promoting properties. However, as a bioceramic material, the molding process of silicon nitride needs to be optimized, and its osteogenic mechanism must be further investigated. Herein, we summarize the impact of the molding process of silicon nitride on its osteogenic properties and clinical applications. In addition, the mechanisms of silicon nitride in promoting osteogenesis are discussed, followed by a summary of the current gaps in silicon nitride mechanism research. This review, therefore, aims to provide novel ideas for the future development and applications of silicon nitride.
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Affiliation(s)
- Ziyi Liu
- Stomatological Hospital, Southern Medical University, Jiangnan Avenue 366, Guangzhou 510280, China.
| | - Ruijie Wang
- Stomatological Hospital, Southern Medical University, Jiangnan Avenue 366, Guangzhou 510280, China.
| | - Wenjing Liu
- Stomatological Hospital, Southern Medical University, Jiangnan Avenue 366, Guangzhou 510280, China.
| | - Yushan Liu
- Stomatological Hospital, Southern Medical University, Jiangnan Avenue 366, Guangzhou 510280, China.
| | - Xiaoli Feng
- Stomatological Hospital, Southern Medical University, Jiangnan Avenue 366, Guangzhou 510280, China.
| | - Fujian Zhao
- Stomatological Hospital, Southern Medical University, Jiangnan Avenue 366, Guangzhou 510280, China.
| | - Pei Chen
- Stomatological Hospital, Southern Medical University, Jiangnan Avenue 366, Guangzhou 510280, China.
| | - Longquan Shao
- Stomatological Hospital, Southern Medical University, Jiangnan Avenue 366, Guangzhou 510280, China.
| | - Mingdeng Rong
- Stomatological Hospital, Southern Medical University, Jiangnan Avenue 366, Guangzhou 510280, China.
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4
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Yunsheng D, Hui X, Jie W, Tingting Y, Naiqi K, Jiaxing H, Wei C, Yufei L, Qiang Y, Shufang W. Sustained release silicon from 3D bioprinting scaffold using silk/gelatin inks to promote osteogenesis. Int J Biol Macromol 2023; 234:123659. [PMID: 36796557 DOI: 10.1016/j.ijbiomac.2023.123659] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 01/20/2023] [Accepted: 02/09/2023] [Indexed: 02/16/2023]
Abstract
Repairing extensive bone defects that cannot self-heal has been a clinical challenge. The construction of scaffolds with osteogenic activity through tissue engineering can provide an effective strategy for bone regeneration. This study utilized gelatin, silk fibroin, and Si3N4 as scaffold materials to prepare silicon-functionalized biomacromolecules composite scaffolds using three-dimensional printing (3DP) technology. This system delivered positive outcomes when Si3N4 levels were 1 % (1SNS). The results showed that the scaffold had a porous reticular structure with a pore size of 600-700 μm. The Si3N4 nanoparticles were distributed uniformly in the scaffold. The scaffold could release Si ions for up to 28 days. In vitro experiments showed that the scaffold had good cytocompatibility, promoting the osteogenic differentiation of mesenchymal stem cells (MSCs). In vivo experiments on bone defects in rats showed that the 1SNS group facilitated bone regeneration. Therefore, the composite scaffold system showed potential for application in bone tissue engineering.
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Affiliation(s)
- Dong Yunsheng
- State Key Laboratory of Medicinal Chemical Biology, The Key Laboratory of Bioactive Materials, The College of Life Science, Nankai University, 300071 Tianjin, China
| | - Xiao Hui
- State Key Laboratory of Medicinal Chemical Biology, The Key Laboratory of Bioactive Materials, The College of Life Science, Nankai University, 300071 Tianjin, China
| | - Wang Jie
- State Key Laboratory of Medicinal Chemical Biology, The Key Laboratory of Bioactive Materials, The College of Life Science, Nankai University, 300071 Tianjin, China
| | - Yang Tingting
- State Key Laboratory of Medicinal Chemical Biology, The Key Laboratory of Bioactive Materials, The College of Life Science, Nankai University, 300071 Tianjin, China
| | - Kang Naiqi
- State Key Laboratory of Medicinal Chemical Biology, The Key Laboratory of Bioactive Materials, The College of Life Science, Nankai University, 300071 Tianjin, China
| | - Huang Jiaxing
- State Key Laboratory of Medicinal Chemical Biology, The Key Laboratory of Bioactive Materials, The College of Life Science, Nankai University, 300071 Tianjin, China
| | - Cui Wei
- Qingdao Alticera Advanced Materials Co., Ltd, 266299 Shan Dong, China
| | - Liu Yufei
- State Key Laboratory of Medicinal Chemical Biology, The Key Laboratory of Bioactive Materials, The College of Life Science, Nankai University, 300071 Tianjin, China
| | - Yang Qiang
- Department of Spine Surgery, Tianjin Hospital, Tianjin University, 300211 Tianjin, China.
| | - Wang Shufang
- State Key Laboratory of Medicinal Chemical Biology, The Key Laboratory of Bioactive Materials, The College of Life Science, Nankai University, 300071 Tianjin, China.
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5
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Shen Y, Fang K, Xiang Y, Xu K, Yu L, Chen J, Ma P, Cai K, Shen X, Liu J. Improvement in osteogenesis, vascularization, and corrosion resistance of titanium with silicon-nitride doped micro-arc oxidation coatings. Front Bioeng Biotechnol 2022; 10:1023032. [PMID: 36324887 PMCID: PMC9621325 DOI: 10.3389/fbioe.2022.1023032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 09/28/2022] [Indexed: 11/13/2022] Open
Abstract
Titanium (Ti) implants have been widely used for the treatment of tooth loss due to their excellent biocompatibility and mechanical properties. However, modifying the biological properties of these implants to increase osteointegration remains a research challenge. Additionally, the continuous release of various metal ions in the oral microenvironment due to fluid corrosion can also lead to implant failure. Therefore, simultaneously improving the bioactivity and corrosion resistance of Ti-based materials is an urgent need. In recent decades, micro-arc oxidation (MAO) has been proposed as a surface modification technology to form a surface protective oxide layer and improve the comprehensive properties of Ti. The present study doped nano silicon nitride (Si3N4) particles into the Ti surface by MAO treatment to improve its corrosion resistance and provide excellent osteoinduction by enhancing alkaline phosphatase activity and osteogenic-related gene expression. In addition, due to the presence of silicon, the Si3N4-doped materials showed excellent angiogenesis properties, including the promotion of cell migration and tubule formation, which play essential roles in early recovery after implantation.
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Affiliation(s)
- Yiding Shen
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Kai Fang
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Yun Xiang
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Keyuan Xu
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Liang Yu
- School and Hospital of Stomatology, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jiaquan Chen
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Pingping Ma
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Kaiyong Cai
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
- *Correspondence: Kaiyong Cai, ; Xinkun Shen, ; Jinsong Liu,
| | - Xinkun Shen
- Science and Education Division, The Third Affiliated Hospital of Wenzhou Medical University (Ruian People’s Hospital), Wenzhou, China
- *Correspondence: Kaiyong Cai, ; Xinkun Shen, ; Jinsong Liu,
| | - Jinsong Liu
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
- *Correspondence: Kaiyong Cai, ; Xinkun Shen, ; Jinsong Liu,
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6
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Lamnini S, Elsayed H, Lakhdar Y, Baino F, Smeacetto F, Bernardo E. Robocasting of advanced ceramics: ink optimization and protocol to predict the printing parameters - A review. Heliyon 2022; 8:e10651. [PMID: 36164511 PMCID: PMC9508426 DOI: 10.1016/j.heliyon.2022.e10651] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/07/2022] [Accepted: 09/09/2022] [Indexed: 11/26/2022] Open
Abstract
Direct-Ink-Writing (or robocasting) is a subset of extrusion-based additive manufacturing techniques that has grown significantly in recent years to design simple to complex ceramic structures. Robocasting, relies on the use of high-concentration powder pastes, also known as inks. A successful optimization of ink rheology and formulation constitutes the major key factor to ensure printability for the fabrication of self-supporting ceramic structures with a very precise dimensional resolution. However, to date achieving a real balance between a comprehensive optimization of ink rheology and the determination of a relevant protocol to predict the printing parameters for a given ink is still relatively scarce and has been not yet standardized in the literature. The current review reports, in its first part, a detailed survey of recent studies on how ink constituents and composition affect the direct-ink-writing of ceramic parts, taking into account innovative ceramic-based-inks formulations and processing techniques. Precisely, the review elaborates the major factors influencing on ink rheology and printability, specifically binder type, particle physical features (size, morphology and density) and ceramic feedstock content. In the second part, this review suggests a standardized guideline to effectively adapt a suitable setting of the printing parameters, such as printing speed and pressure, printing substrate, strut spacing, layer height, nozzle diameter in function of ink intrinsic rheology.
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Affiliation(s)
- Soukaina Lamnini
- Institute of Materials Physics and Engineering, Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy.,Materials Science, Energy & Nano engineering, MSN Department, University Mohammed VI Polytechnic Benguerir, Morocco
| | - Hamada Elsayed
- Department of Industrial Engineering, University of Padova, 35100 Padova, Italy.,Ceramics Department, National Research Centre, El-Bohous Street, 12622 Cairo, Egypt
| | - Yazid Lakhdar
- School of Metallurgy and Materials, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Francesco Baino
- Institute of Materials Physics and Engineering, Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy
| | - Federico Smeacetto
- Institute of Materials Physics and Engineering, Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy
| | - Enrico Bernardo
- Department of Industrial Engineering, University of Padova, 35100 Padova, Italy
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7
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Chimerad M, Barazesh A, Zandi M, Zarkesh I, Moghaddam A, Borjian P, Chimehrad R, Asghari A, Akbarnejad Z, Khonakdar HA, Bagher Z. Tissue engineered scaffold fabrication methods for medical applications. INT J POLYM MATER PO 2022. [DOI: 10.1080/00914037.2022.2101112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Mohammadreza Chimerad
- Department of Mechanical & Aerospace Engineering, College of Engineering & Computer Science, University of Central Florida, Orlando, Florida, USA
| | - Alireza Barazesh
- Tissue Engineering and Biological Systems Research Laboratory, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
| | - Mojgan Zandi
- Department of Polymer Processing, Iran Polymer and Petrochemical Institute, Tehran, Iran
| | - Ibrahim Zarkesh
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Armaghan Moghaddam
- Department of Polymer Processing, Iran Polymer and Petrochemical Institute, Tehran, Iran
| | - Pouya Borjian
- Department of Mechanical & Aerospace Engineering, College of Engineering & Computer Science, University of Central Florida, Orlando, Florida, USA
| | - Rojan Chimehrad
- Department of Biological Sciences, Islamic Azad University Tehran Medical Branch, Tehran, Iran
| | - Alimohamad Asghari
- Skull Base Research Center, School of Medicine, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran, Iran
| | - Zeinab Akbarnejad
- ENT and Head and Neck Research Center and Department, School of Medicine, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran, Iran
| | - Hossein Ali Khonakdar
- Department of Polymer Processing, Iran Polymer and Petrochemical Institute, Tehran, Iran
| | - Zohreh Bagher
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
- ENT and Head and Neck Research Center and Department, School of Medicine, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran, Iran
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8
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Aguirre TG, Cramer CL, Mitchell DJ. Review of additive manufacturing and densification techniques for the net- and near net-shaping of geometrically complex silicon nitride components. Ann Ital Chir 2022. [DOI: 10.1016/j.jeurceramsoc.2021.11.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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9
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Nanoscale Topographical Effects on the Adsorption Behavior of Bone Morphogenetic Protein-2 on Graphite. Int J Mol Sci 2022; 23:ijms23052432. [PMID: 35269575 PMCID: PMC8910650 DOI: 10.3390/ijms23052432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 02/19/2022] [Accepted: 02/20/2022] [Indexed: 12/10/2022] Open
Abstract
The interaction between bone morphogenetic protein-2 (BMP-2) and the surface of biomaterials is essential for the restoration of bone and cartilage tissue, inducing cellular differentiation and proliferation. The properties of the surface, including topology features, regulate the conformation and bioactivity of the protein. In this research, we investigated the influence of nanopatterned surfaces on the interaction of a homodimer BMP-2 with graphite material by combining molecular dynamics (MD) and steered molecular dynamics (SMD) simulations. The graphite substrates were patterned as flat, linear grating, square, and circular profiles in combination with BMP-2 conformation in the side-on configuration. Ramachandran plots for the wrist and knuckle epitopes indicated no steric hindrances and provided binding sites to type I and type II receptors. Results showed two optimal patterns that increased protein adsorption of the lower monomer while preserving the secondary structure and leaving the upper monomer free to interact with the cells. Charged residues arginine and lysine and polar residues histidine and tyrosine were the main residues responsible for the strong interaction with the graphite surface. This research provides new molecular-level insights to further understand the mechanisms underlying protein adsorption on nanoscale patterned substrates.
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10
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Lee SS, Laganenka L, Du X, Hardt WD, Ferguson SJ. Silicon Nitride, a Bioceramic for Bone Tissue Engineering: A Reinforced Cryogel System With Antibiofilm and Osteogenic Effects. Front Bioeng Biotechnol 2021; 9:794586. [PMID: 34976982 PMCID: PMC8714913 DOI: 10.3389/fbioe.2021.794586] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 11/08/2021] [Indexed: 01/05/2023] Open
Abstract
Silicon nitride (SiN [Si3N4]) is a promising bioceramic for use in a wide variety of orthopedic applications. Over the past decades, it has been mainly used in industrial applications, such as space shuttle engines, but not in the medical field due to scarce data on the biological effects of SiN. More recently, it has been increasingly identified as an emerging material for dental and orthopedic implant applications. Although a few reports about the antibacterial properties and osteoconductivity of SiN have been published to date, there have been limited studies of SiN-based scaffolds for bone tissue engineering. Here, we developed a silicon nitride reinforced gelatin/chitosan cryogel system (SiN-GC) by loading silicon nitride microparticles into a gelatin/chitosan cryogel (GC), with the aim of producing a biomimetic scaffold with antibiofilm and osteogenic properties. In this scaffold system, the GC component provides a hydrophilic and macroporous environment for cells, while the SiN component not only provides antibacterial properties and osteoconductivity but also increases the mechanical stiffness of the scaffold. This provides enhanced mechanical support for the defect area and a better osteogenic environment. First, we analyzed the scaffold characteristics of SiN-GC with different SiN concentrations, followed by evaluation of its apatite-forming capacity in simulated body fluid and protein adsorption capacity. We further confirmed an antibiofilm effect of SiN-GC against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) as well as enhanced cell proliferation, mineralization, and osteogenic gene upregulation for MC3T3-E1 pre-osteoblast cells. Finally, we developed a bioreactor to culture cell-laden scaffolds under cyclic compressive loading to mimic physiological conditions and were able to demonstrate improved mineralization and osteogenesis from SiN-GC. Overall, we confirmed the antibiofilm and osteogenic effect of a silicon nitride reinforced cryogel system, and the results indicate that silicon nitride as a biomaterial system component has a promising potential to be developed further for bone tissue engineering applications.
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Affiliation(s)
- Seunghun S. Lee
- Department of Health Sciences and Technology, Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Leanid Laganenka
- Department of Biology, Institute of Microbiology, ETH Zurich, Zurich, Switzerland
| | - Xiaoyu Du
- Department of Health Sciences and Technology, Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Wolf-Dietrich Hardt
- Department of Biology, Institute of Microbiology, ETH Zurich, Zurich, Switzerland
| | - Stephen J. Ferguson
- Department of Health Sciences and Technology, Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
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11
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Erol K, Bülter MB, Köse DA, Can HK. Water-soluble polymeric particle embedded cryogels: Synthesis, characterisation and adsorption of haemoglobin. JOURNAL OF POLYMER ENGINEERING 2021. [DOI: 10.1515/polyeng-2020-0285] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Making cryogels, which are among today’s accepted adsorbents, more functional with different methods, has been one of the subjects spent overtime. In this study, water-soluble poly(maleic anhydride-alt-acrylic acid) polymer embedded in poly(2-hydroxyethyl methacrylate) cryogels. Copper ions were then immobilised to this structure, and this polymer was used for adsorption of haemoglobin from aqueous systems. Adsorption interaction was carried out on an electrostatic basis, and approximately 448.62 mg haemoglobin/g polymer adsorption capacity value was obtained. It was found that the same material has managed to maintain its adsorption ability by 90.3% even after the use of it five times in the adsorption/desorption cycle. The adsorption interaction was determined to be appropriate for the Langmuir model by isotherm studies. The change in Gibbs free energy value was calculated as −2.168 kJ/mol.
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Affiliation(s)
- Kadir Erol
- Department of Medical Services and Techniques , Vocational School of Health Services, Hitit University , Çorum 19030 , Turkey
| | - Melda Bolat Bülter
- Department of Property Protection and Security , Vocational School of Technical Sciences, Hitit University , Çorum 19900 , Turkey
| | - Dursun Ali Köse
- Department of Chemistry , Faculty of Arts and Sciences, Hitit University , Çorum 19040 , Turkey
| | - Hatice Kaplan Can
- Department of Chemistry , Faculty of Science, Hacettepe University , Ankara 06800 , Turkey
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