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Kalluri L, Griggs JA, Janorkar AV, Xu X, Chandran R, Mei H, Nobles KP, Yang S, Alberto L, Duan Y. Preparation and optimization of an eggshell membrane-based biomaterial for GTR applications. Dent Mater 2024; 40:728-738. [PMID: 38401993 DOI: 10.1016/j.dental.2024.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 12/20/2023] [Accepted: 02/12/2024] [Indexed: 02/26/2024]
Abstract
OBJECTIVES Guided Tissue Regeneration (GTR) is a popular clinical procedure for periodontal tissue regeneration. However, its key component, the barrier membrane, is largely collagen-based and is still quite expensive, posing a financial burden to the patients as well as healthcare systems and negatively impacting the patient's decision-making. Thus, our aim is to prepare a novel biomimetic GTR membrane utilizing a natural biomaterial, soluble eggshell membrane protein (SEP), which is economical as it comes from an abundant industrial waste from food and poultry industries, unlike collagen. Additive polymer, poly (lactic-co-glycolic acid) (PLGA), and a bioceramic, nano-hydroxyapatite (HAp), were added to improve its mechanical and biological properties. METHODS For this barrier membrane preparation, we initially screened the significant factors affecting its mechanical properties using Taguchi orthogonal array design and further optimized the significant factors using response surface methodology. Furthermore, this membrane was characterized using SEM, EDAX, and ATR-FTIR, and tested for proliferation activity of human periodontal ligament fibroblasts (HPLFs). RESULTS Optimization using response surface methodology predicted that the maximal tensile strength of 3.1 MPa and modulus of 39.9 MPa could be obtained at membrane composition of 8.9 wt% PLGA, 7.2 wt% of SEP, and 2 wt% HAp. Optimized PLGA/SEP/HAp membrane specimens that were electrospun on a static collector showed higher proliferation activity of HPLFs compared to tissue culture polystyrene and a commercial collagen membrane. SIGNIFICANCE From the results observed, we can conclude that SEP-based nanofibrous GTR membrane could be a promising, environment-friendly, and cost-effective alternative for commercial collagen-based GTR membrane products.
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Affiliation(s)
- Lohitha Kalluri
- Department of Biomedical Materials Science, School of Dentistry, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Jason A Griggs
- Department of Biomedical Materials Science, School of Dentistry, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Amol V Janorkar
- Department of Biomedical Materials Science, School of Dentistry, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Xiaoming Xu
- Department of Oral and Craniofacial Biology, School of Dentistry, Louisiana State University Health Sciences Center, New Orleans, LA 70119, USA
| | - Ravi Chandran
- Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Hao Mei
- Department of Data Science, School of Population Health, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Kadie P Nobles
- Department of Biomedical Materials Science, School of Dentistry, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Shan Yang
- Department of Chemistry, Physics, and Atmospheric Sciences, Jackson State University, Jackson, MS 39217, USA
| | - Laura Alberto
- Department of Biomedical Materials Science, School of Dentistry, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Yuanyuan Duan
- Department of Biomedical Materials Science, School of Dentistry, University of Mississippi Medical Center, Jackson, MS 39216, USA.
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Zhang Q, Lou C, Li H, Li Y, Zhang H, Li Z, Qi G, Cai X, Luo Q, Fan L, Li X, Lao W, Zhu W, Li X. Zinc hybrid polyester barrier membrane accelerates guided tissue regeneration. J Control Release 2024; 368:676-690. [PMID: 38458572 DOI: 10.1016/j.jconrel.2024.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 03/04/2024] [Accepted: 03/05/2024] [Indexed: 03/10/2024]
Abstract
Barrier membranes play a pivotal role in the success of guided periodontal tissue regeneration. The biodegradable barriers predominantly used in clinical practice often lack sufficient barrier strength, antibacterial properties, and bioactivity, frequently leading to suboptimal regeneration outcomes. Although with advantages in mechanical strength, biodegradability and plasticity, bioinert aliphatic polyesters as barrier materials are usually polymerized via toxic catalysts, hard to be functionalized and lack of antibacterial properties. To address these challenges, we propose a new concept that controlled release of bioactive substance on the whole degradation course can give a bioinert aliphatic polyester bioactivity. Thus, a Zn-based catalytic system for polycondensation of dicarboxylic acids and diols is created to prepare zinc covalent hybrid polyester (PBS/ZnO). The atomically-dispersed Zn2+ ions entering main chain of polyester molecules endow PBS/ZnO barrier with antibacterial properties, barrier strength, excellent biocompatibility and histocompatibility. Further studies reveal that relying on long-term controlled release of Zn2+ ions, the PBS/ZnO membrane greatly expedites osteogenetic effect in guided tissue regeneration (GTR) by enhancing the mitochondrial function of macrophages to induce M2 polarization. These findings show a novel preparation strategy of bioactive polyester biomaterials based on long term controlled release of bioactive substance that integrates catalysis, material structures and function customization.
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Affiliation(s)
- Qiao Zhang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Chaoqian Lou
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Hang Li
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Yanyan Li
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Hongjie Zhang
- College of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Zimeng Li
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Ganggang Qi
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Xia Cai
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Qiaojie Luo
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Lijie Fan
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Xiaojun Li
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China.
| | - Weiwei Lao
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China.
| | - Weipu Zhu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China; Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province, Hangzhou 310027, China
| | - Xiaodong Li
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China.
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Zhou WH, Li YF. A bi-layered asymmetric membrane loaded with demineralized dentin matrix for guided bone regeneration. J Mech Behav Biomed Mater 2024; 149:106230. [PMID: 37976993 DOI: 10.1016/j.jmbbm.2023.106230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/02/2023] [Accepted: 11/07/2023] [Indexed: 11/19/2023]
Abstract
OBJECTIVES Guided bone regeneration (GBR) is a well-established method for repairing hard tissue deficiency in reconstructive dentistry. The aim of this study was to investigate the barrier function, osteogenic activity and immunomodulatory ability of a novel bi-layered asymmetric membrane loaded with demineralized dentin matrix (DDM). METHODS DDM particles were harvested from healthy, caries-free permanent teeth. Electrospinning technique was utilized to prepare bi-layered DDM-loaded poly(lactic-co-glycolic acid) (PLGA)/poly(lactic acid) (PLA) membranes (abbreviated as DPP bilayer membranes). We analyzed the membranes' surface properties, cytocompatibility and barrier function, and evaluated their osteogenic activity in vitro. In addition, its effects on the osteogenic immune microenvironment were also investigated. RESULTS Synthetic DPP bilayer membranes presented suitable surface characteristics and satisfactory cytocompatibility. Transwell assays showed significant fewer migrated cells by the DPP bilayer membranes compared with blank control, with or without in vitro degradation (all P < 0.001). In vitro experiments indicated that our product elevated messenger ribonucleic acid (mRNA) expression levels of osteogenic genes alkaline phosphatase (ALP), osteopontin (OPN), osteocalcin (OCN) and runt-related transcription factor 2 (Runx2). Among all groups, 20% DPP bilayer membrane displayed highest ALP activity (P < 0.001). Furthermore, DPP bilayer membranes enhanced the mRNA expression of M2 macrophage markers and increased the proportion of CD206+ M2 macrophages by 100% (20% DPP: P < 0.001; 30% DPP: P < 0.001; 40% DPP: P < 0.05), thus exerting an inflammation suppressive effect. CONCLUSIONS DPP bilayer membranes exhibited notable biological safety and osteogenic activity in vitro, and have potential as a prospective candidate for GBR approach in the future.
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Affiliation(s)
- Wan-Hang Zhou
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Yan-Fei Li
- Department of Stomatology, The Eighth Affiliated Hospital, Sun Yat-Sen University, Shenzhen, 518033, China.
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Zhang L, Dong Y, Liu Y, Liu X, Wang Z, Wan J, Yu X, Wang S. Multifunctional hydrogel/platelet-rich fibrin/nanofibers scaffolds with cell barrier and osteogenesis for guided tissue regeneration/guided bone regeneration applications. Int J Biol Macromol 2023; 253:126960. [PMID: 37741482 DOI: 10.1016/j.ijbiomac.2023.126960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 07/11/2023] [Accepted: 09/14/2023] [Indexed: 09/25/2023]
Abstract
Periodontal defect seriously affects people's life health and quality. Guided tissue regeneration (GTR) and guided bone regeneration (GBR) have made great progress in periodontal disease treatment, but some deficiencies existed in commercial materials of GTR and GBR. For obtaining better therapeutic effects, multifunctional composite scaffolds containing different biological macromolecules were developed in this study. Chitosan/poly (γ-glutamic acid)/nano-hydroxyapatite hydrogels (CP/nHA) made by electrostatic interactions and lyophilization were filled in the bone defects to achieve osteogenesis. Platelet-rich fibrin (PRF) extracted from blood could accelerate bone formation by releasing various bioactive substances as middle layer of composite scaffolds. Polycaprolactone/gelatin nanofibers (PG) prepared by electrospinning were attached to the junction of soft and hard tissue, which could prevent fibrous tissue from infiltrating into bone defects. The composite scaffolds showed good morphology, biocompatibility, cell barriers and osteogenic differentiation in vitro. The excellent ability of bone formation was verified by implantation of triple-layered composite scaffolds into alveolar bone defects in rabbit in vivo. The hierarchical structure was conducive to personalized customization to meet the needs of different defects. All in all, the multifunctional scaffolds could play important roles of GTR and GBR in alveolar bone regeneration and provide good application prospect for bone repair in clinic.
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Affiliation(s)
- Lin Zhang
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China; School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong 250022, China
| | - Yunsheng Dong
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Yufei Liu
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Xiangsheng Liu
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Zhitao Wang
- Department of Periodontid, Tianjin Stomatological Hospital, School of Medicine, Nankai University, Tianjin Key Laboratory of Oral Function Reconstruction, Tianjin 300041, China
| | - Jinpeng Wan
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Xinyi Yu
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Shufang Wang
- Key Laboratory of Bioactive Materials for Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China.
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Dutta SD, Patil TV, Ganguly K, Randhawa A, Acharya R, Moniruzzaman M, Lim KT. Trackable and highly fluorescent nanocellulose-based printable bio-resins for image- guided tissue regeneration. Carbohydr Polym 2023; 320:121232. [PMID: 37659796 DOI: 10.1016/j.carbpol.2023.121232] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 07/18/2023] [Accepted: 07/21/2023] [Indexed: 09/04/2023]
Abstract
Dynamic tracking of cell migration during tissue regeneration remains challenging owing to imaging techniques that require sophisticated devices, are often lethal to healthy tissues. Herein, we developed a 3D printable non-invasive polymeric hydrogel based on 2,2,6,6-(tetramethylpiperidin-1-yl) oxyl (TEMPO)-oxidized nanocellulose (T-CNCs) and carbon dots (CDs) for the dynamic tracking of cells. The as-prepared T-CNC@CDs were used to fabricate a liquid bio-resin containing gelatin methacryloyl (GelMA) and polyethylene glycol diacrylate (GPCD) for digital light processing (DLP) bioprinting. The shear-thinning properties of the GPCD bio-resin were further improved by the addition of T-CNC@CDs, allowing high-resolution 3D printing and bioprinting of human cells with higher cytocompatibility (viability ∼95 %). The elastic modulus of the printed GPCD hydrogel was found to be ∼13 ± 4.2 kPa, which is ideal for soft tissue engineering. The as-fabricated hydrogel scaffold exhibited tunable structural color property owing to the addition of T-CNC@CDs. Owing to the unique fluorescent property of T-CNC@CDs, the human skin cells could be tracked within the GPCD hydrogel up to 30 days post-printing. Therefore, we anticipate that GPCD bio-resin can be used for 3D bioprinting with high structural stability, dynamic tractability, and tunable mechanical stiffness for image-guided tissue regeneration.
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Affiliation(s)
- Sayan Deb Dutta
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Gangwon-do, Republic of Korea; Institue of Forest Science, Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Gangwon-do, Republic of Korea
| | - Tejal V Patil
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Gangwon-do, Republic of Korea; Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon 24341, Gangwon-do, Republic of Korea
| | - Keya Ganguly
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Gangwon-do, Republic of Korea
| | - Aayushi Randhawa
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Gangwon-do, Republic of Korea; Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon 24341, Gangwon-do, Republic of Korea
| | - Rumi Acharya
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Gangwon-do, Republic of Korea; Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon 24341, Gangwon-do, Republic of Korea
| | - Md Moniruzzaman
- Department of Chemical and Biological Engineering, Gachon University, Seongnam, Gyeonggi-do 13120, Republic of Korea
| | - Ki-Taek Lim
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Gangwon-do, Republic of Korea; Institue of Forest Science, Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Gangwon-do, Republic of Korea; Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon 24341, Gangwon-do, Republic of Korea.
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Liu J, Wang J, Wang L. [Advances in the raw material selection and functional design of artificial nerve guidance conduits]. Sheng Wu Gong Cheng Xue Bao 2023; 39:4057-4074. [PMID: 37877390 DOI: 10.13345/j.cjb.221049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
Artificial nerve guidance conduits (NGCs) are synthetic nerve grafts that are capable of providing the structural and nutritional support for nerve regeneration. The ideal NGCs have plenty of requirements on biocompatibility, mechanical strength, topological structure, and conductivity. Therefore, it is necessary to continuously improve the design of NGCs and establish a better therapeutic strategy for peripheral nerve injury in order to meet clinical needs. Although current NGCs have made certain process in the treatment of peripheral nerve injury, their nerve regeneration and functional outcomes on repairing long-distance nerve injury remain unsatisfactory. Herein, we review the nerve conduit design from four aspects, namely raw material selection, structural design, therapeutic factor loading and self-powered component integration. Moreover, we summarize the research progress of NGCs in the treatment of peripheral nerve injury, in order to facilitate the iterative updating and clinical transformation of NGCs.
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Affiliation(s)
- Jingwei Liu
- Hubei Key Laboratory of Regenerative Medicine and Multi-disciplinary Translational Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
| | - Jian Wang
- Hubei Key Laboratory of Regenerative Medicine and Multi-disciplinary Translational Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
- Department of Clinical Laboratory, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
| | - Lin Wang
- Hubei Key Laboratory of Regenerative Medicine and Multi-disciplinary Translational Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
- Department of Clinical Laboratory, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
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Keçeciler-Emir C, Başaran-Elalmiş Y, Şahin YM, Buluş E, Yücel S. Fabrication and characterization of chlorhexidine gluconate loaded poly(vinyl alcohol)/45S5 nano-bioactive glass nanofibrous membrane for guided tissue regeneration applications. Biopolymers 2023; 114:e23562. [PMID: 37421643 DOI: 10.1002/bip.23562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/25/2023] [Accepted: 06/28/2023] [Indexed: 07/10/2023]
Abstract
Polymeric barrier membranes are used in periodontal applications to prevent fibroblastic cell migration into the cavities of bone tissue and to properly guide the proliferation of tissues. In this study, the fabrication, characterization, bioactivity, and in vitro biological properties of polyvinyl alcohol-based nanofibrous membranes containing nano-sized 45S5 bioactive glass (BG) loaded with chlorhexidine (CH) gluconate with biocompatible, bioactive, and antibacterial properties for using as dental barrier membranes were investigated. Nanofibrous membranes with an average fiber diameter, pore size, and porosity of 210 nm, 24.73 μm, and 12.42%, respectively, were loaded with 1% and 2% CH, and the release profile was investigated. The presence of BG in the membranes promoted fibroblastic proliferation and the presence of CH provided antibacterial properties. Nanofibrous membranes exhibit a high ability to restrict bacterial growth while fulfilling the necessary conditions for use as a dental barrier thanks to their low swelling rates, significant surface bioactivities, and appropriate degradation levels.
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Affiliation(s)
- Ceren Keçeciler-Emir
- Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Yildiz Technical University, Istanbul, Turkey
- Faculty of Rafet Kayis Engineering, Genetic and Bioengineering Department, Alanya Alaaddin Keykubat University, Antalya, Turkey
| | - Yeliz Başaran-Elalmiş
- Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Yildiz Technical University, Istanbul, Turkey
- Health Biotechnology Joint Research and Application Center of Excellence, Istanbul, Turkey
| | - Yeşim Müge Şahin
- Faculty of Engineering, Department of Biomedical Engineering, İstanbul Arel University, İstanbul, Turkey
- Polymer Technologies and Composite Application and Research Center, İstanbul Arel University, İstanbul, Turkey
| | - Erdi Buluş
- Polymer Technologies and Composite Application and Research Center, İstanbul Arel University, İstanbul, Turkey
- Department of Transportation Services Civil Aviation Cabin Services Program, Vocational School, Istanbul Arel University, Istanbul, Turkey
| | - Sevil Yücel
- Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Yildiz Technical University, Istanbul, Turkey
- Health Biotechnology Joint Research and Application Center of Excellence, Istanbul, Turkey
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Ahmad S, Alam S, Andrabi SMUN, Kumar A. Combined surgical and conservative endodontic management of Oehler's type 3b dens invaginatus aided by guided tissue regeneration. BMJ Case Rep 2023; 16:e255546. [PMID: 37758663 PMCID: PMC10537856 DOI: 10.1136/bcr-2023-255546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2023] Open
Abstract
The present case describes the successful healing of a periapical lesion associated with the left maxillary lateral incisor (# 22, Federation Dentaire Internationale) having a type 3b dens invaginatus tooth morphology. The treatment was complicated by the presence of blunderbuss root apex and large periapical lesion (>10 mm) with through and through bone defect (Bucco palatal cortical bone perforation, Von Arx Type 1b). An adolescent boy reported palatal swelling and pus discharge in relation to tooth #22. A thorough clinical and radiographic examination revealed tooth #22 as having a type 3b dens invaginatus with an open apex and a diagnosis of pulp necrosis and acute apical abscess. The case was managed by non-surgical root canal treatment followed by endodontic surgery using principles of guided tissue regeneration. A 5-year recall revealed an asymptomatic functional tooth with complete healing.
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Affiliation(s)
- Sarah Ahmad
- Conservative Dentistry and Endodontics, Dr Z.A Dental College, Faculty of Medicine, Aligarh Muslim University, Aligarh, India
| | - Sharique Alam
- Conservative Dentistry and Endodontics, Dr Z.A Dental College, Faculty of Medicine, Aligarh Muslim University, Aligarh, India
| | - Syed Mukhtar-Un-Nisar Andrabi
- Conservative Dentistry and Endodontics, Dr Z.A Dental College, Faculty of Medicine, Aligarh Muslim University, Aligarh, India
| | - Ashok Kumar
- Conservative Dentistry and Endodontics, Dr Z.A Dental College, Faculty of Medicine, Aligarh Muslim University, Aligarh, India
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Heitz-Mayfield LJA, Heitz F, Koong B, Huang T, Chivers P. Surgical peri-implantitis treatment with and without guided bone regeneration. A randomized controlled trial. Clin Oral Implants Res 2023; 34:892-910. [PMID: 37382408 DOI: 10.1111/clr.14116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/20/2023] [Accepted: 06/07/2023] [Indexed: 06/30/2023]
Abstract
OBJECTIVE To evaluate the efficacy of reconstructive peri-implantitis treatment. MATERIALS AND METHODS Forty participants, with peri-implantitis and a contained intraosseous defect, were randomized to access flap (control) or access flap with xenograft and collagen membrane (test). All received systemic antimicrobials. Blinded examiners recorded probing depths (PD), bleeding and suppuration on probing (BOP & SOP), soft tissue levels, and marginal bone levels (MBL) at baseline and 12 months. Patient reported outcomes were recorded. The primary outcome was PD change. RESULTS All 40 participants (40 implants) completed the 12-month study. The mean (standard deviation) PD reduction (deepest site) was 4.2 (1.8) mm in the control and 3.7 (1.9) mm in the test group. MBL gain (deepest site) was 1.7 (1.6) mm in the control and 2.4 (1.4) mm in the test group. Absence of BOP & SOP was observed at 60% of both control and test implants. Buccal recession was 0.9 (1.6) mm in the control and 0.4 (1.1) mm in the test group. A successful outcome (absence of PD ≥ 5 mm with BOP, absence of SOP and absence of progressive bone loss) was achieved for 90% of the control and 85% of test group implants. No statistically significant differences in clinical or radiographic parameters were found between treatment groups. 30% of participants experienced mild gastro-intestinal disturbances. Reporting followed CONSORT guidelines. CONCLUSION Similar clinical and radiographic improvements at 12 months were observed with high levels of patient satisfaction for both the access flap and xenograft covered by collagen membrane groups. Registered clinical trials.gov. ID:NCT03163602 (23/05/2017).
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Affiliation(s)
- Lisa J A Heitz-Mayfield
- International Research Collaborative, Oral Health and Equity, School of Human Anatomy and Biology, The University of Western Australia, Crawley, Western Australia, Australia
- Faculty of Medicine and Health, School of Dentistry, The University of Sydney, Sydney, New South Wales, Australia
- Perth Periodontal Specialists, West Leederville, Western Australia, Australia
| | - Fritz Heitz
- Perth Periodontal Specialists, West Leederville, Western Australia, Australia
| | - Bernard Koong
- Envision Medical Imaging, Wembley, Western Australia, Australia
| | - Tom Huang
- Envision Medical Imaging, Wembley, Western Australia, Australia
| | - Paola Chivers
- Institute for Health Research, The University of Notre Dame, Fremantle, Western Australia, Australia
- School of Medical and Health Sciences, ECU, Joondalup, Western Australia, Australia
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Gil ACK, Prado MM, Rocha LRD, Benfatti C, Schuldt Filho G, Almeida JD. In vitro evaluation of membranes for regenerative procedures against oral bacteria. Braz Dent J 2023; 34:57-65. [PMID: 37466526 PMCID: PMC10355258 DOI: 10.1590/0103-6440202305060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Accepted: 03/20/2023] [Indexed: 07/20/2023] Open
Abstract
The current literature on guided bone regeneration (GBR) and guided tissue regeneration (GTR) membrane contamination reports that the physicochemical characteristics of these biomaterials might influence affinity to bacteria, which appears to be a major drawback for the clinical outcome of the regenerative procedures. Thus, this study aimed to evaluate, in vitro, a multispecies biofilm adherence and passage of bacteria through different types of commercially available membranes for GTR/GBR. Four types of membranes were tested (n=12): LC) Lumina Coat®; JS) Jason®; BG) Biogide®; and LP) Lumina PTFE®. Aluminum foil (AL) simulated an impermeable barrier and was used as the control. The membranes were adapted to specific apparatus and challenged with a mixed bacterial culture composed of A. actinomycetemcomitans b, S. mutans, S. mitis, and A. israelii. After 2 h or 7 days, bacterial adhesion and passage of bacteria were evaluated through CFU counting, which was analyzed by two-way ANOVA e post hoc Tukey, at a 5% significance level. Representative areas of two membranes of each group were analyzed through scanning electron microscopy (SEM) to assess the morphology and organization of the biofilm over the membrane fibers. LC and LP presented similar values of adhered bacterial cells (p > 0.05), significantly inferior when compared to the other groups, in both time points (p < 0.05). All the tested groups were permeable to bacterial cells, with no significant difference between the trial period of 2 h and 7 days (p > 0.05). SEM analyses demonstrated that adhered bacteria number increased throughout the time points (2 h < 7 days). Commercially available biological membranes demonstrated intense bacterial adherence and passage of bacteria, which increased throughout the trial period.
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Affiliation(s)
- Ana Clara Kuerten Gil
- Department of Implant Dentistry, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina, Brazil
| | - Maick Meneguzzo Prado
- Department of Chemical Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina, Brazil
| | - Laura Rhoden da Rocha
- Department of Endodontics, University of Southern Santa Catarina (UNISUL), Palhoça, Santa Catarina, Brazil
| | - César Benfatti
- Department of Implant Dentistry, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina, Brazil
| | - Guenther Schuldt Filho
- Department of Implant Dentistry, University of Southern Santa Catarina (UNISUL), Palhoça, Santa Catarina, Brazil
| | - Josiane de Almeida
- Department of Endodontics, University of Southern Santa Catarina (UNISUL), Palhoça, Santa Catarina, Brazil
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Antunovic F, Tolosa F, Klein C, Ocaranza R. Polycaprolactone-based scaffolds for guided tissue regeneration in periodontal therapy: A systematic review. J Appl Biomater Funct Mater 2023; 21:22808000231211416. [PMID: 37978859 DOI: 10.1177/22808000231211416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023] Open
Abstract
BACKGROUND Polycaprolactone (PCL) is a highly recognized synthetic polymer for its biocompatibility, ease of fabrication and mechanical strength in bone tissue engineering. Its applications have extended broadly, including regeneration of oral and maxillofacial lost tissues. Its usefulness has brought attention of researchers to regenerate periodontal lost tissues, including alveolar bone, periodontal ligament and cementum. The aim of this systematic review was to obtain an updated analysis of the contribution of PCL-based scaffolds in the alveolar bone regeneration process. METHODS This review adheres to the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines for systematic reviews. A computerized search of the PubMed, EBSCO, Scielo and Web of Science databases was performed, restricting literature search to published studies in English or Spanish between January 2002 and March 2023. Database search returned 248 studies which were screened based on title, author names and publication dates. RESULTS Data from 17 studies were reviewed and tabulated. All studies combined PCL with other biomaterials (such as Alginate, hydroxyapatite, bioactive glass, poly (lactic-co-glycolic acid)), growth factors (BMP-2, rhCEMP1), and/or mesenchymal stromal cells (adipose-derived, bone marrow, periodontal ligament or gingiva mesenchymal stromal cells). PCL scaffolds showed higher cell viability and osteoinductive potential when combined with bioactive agents. Complementary, its degradation rates were affected by the addition or exposure to specific substances, such as: Dopamine, Cerium Oxide, PLGA and hydrogen peroxide. CONCLUSIONS PCL is an effective biomaterial for alveolar bone regeneration in periodontally affected teeth. It could be part of a new generation of biomaterials with improved regenerative potential.
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Affiliation(s)
- Florencia Antunovic
- Escuela de Odontología, Facultad de Medicina - Clínica Alemana de Santiago Universidad del Desarrollo, Santiago de Chile, Chile
| | - Felipe Tolosa
- Escuela de Odontología, Facultad de Medicina - Clínica Alemana de Santiago Universidad del Desarrollo, Santiago de Chile, Chile
| | - Catherine Klein
- Especialidad de Periodoncia, Escuela de Odontología, Facultad de Medicina - Clínica Alemana de Santiago Universidad del Desarrollo, Santiago de Chile, Chile
| | - René Ocaranza
- Especialidad de Periodoncia, Escuela de Odontología, Facultad de Medicina - Clínica Alemana de Santiago Universidad del Desarrollo, Santiago de Chile, Chile
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Ren Y, Fan L, Alkildani S, Liu L, Emmert S, Najman S, Rimashevskiy D, Schnettler R, Jung O, Xiong X, Barbeck M. Barrier Membranes for Guided Bone Regeneration (GBR): A Focus on Recent Advances in Collagen Membranes. Int J Mol Sci 2022; 23:ijms232314987. [PMID: 36499315 PMCID: PMC9735671 DOI: 10.3390/ijms232314987] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/25/2022] [Accepted: 11/25/2022] [Indexed: 12/02/2022] Open
Abstract
Guided bone regeneration (GBR) has become a clinically standard modality for the treatment of localized jawbone defects. Barrier membranes play an important role in this process by preventing soft tissue invasion outgoing from the mucosa and creating an underlying space to support bone growth. Different membrane types provide different biological mechanisms due to their different origins, preparation methods and structures. Among them, collagen membranes have attracted great interest due to their excellent biological properties and desired bone regeneration results to non-absorbable membranes even without a second surgery for removal. This work provides a comparative summary of common barrier membranes used in GBR, focusing on recent advances in collagen membranes and their biological mechanisms. In conclusion, the review article highlights the biological and regenerative properties of currently available barrier membranes with a particular focus on bioresorbable collagen-based materials. In addition, the advantages and disadvantages of these biomaterials are highlighted, and possible improvements for future material developments are summarized.
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Affiliation(s)
- Yanru Ren
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany
- BerlinAnalytix GmbH, 12109 Berlin, Germany
| | - Lu Fan
- NMI Natural and Medical Sciences Institute, University of Tübingen, 72770 Reutlingen, Germany
| | | | - Luo Liu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100013, China
| | - Steffen Emmert
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany
| | - Stevo Najman
- Scientific Research Center for Biomedicine, Department for Cell and Tissue Engineering, Faculty of Medicine, University of Niš, 18000 Niš, Serbia
- Department of Biology and Human Genetics, Faculty of Medicine, University of Niš, 18000 Niš, Serbia
| | - Denis Rimashevskiy
- Department of Traumatology and Orthopedics, Peoples’ Friendship University of Russia, 117198 Moscow, Russia
| | - Reinhard Schnettler
- University Medical Centre, Justus Liebig University of Giessen, 35390 Giessen, Germany
| | - Ole Jung
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany
| | - Xin Xiong
- NMI Natural and Medical Sciences Institute, University of Tübingen, 72770 Reutlingen, Germany
| | - Mike Barbeck
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany
- BerlinAnalytix GmbH, 12109 Berlin, Germany
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100013, China
- Correspondence: ; Tel.: +49-(0)-176-81022467
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13
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Aristodemou E, Retzepi M, Calciolari E, Donos N. The effect of experimental diabetes and membrane occlusiveness on guided bone regeneration: A proof of principle study. Clin Oral Investig 2022; 26:5223-5235. [PMID: 35688955 DOI: 10.1007/s00784-022-04491-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 04/12/2022] [Indexed: 11/03/2022]
Abstract
OBJECTIVES To evaluate the effect of membrane occlusiveness and experimental diabetes on early and late healing following guided bone regeneration. MATERIAL AND METHODS A total of 30 Wistar rats were randomly allocated to three groups: healthy (H), uncontrolled diabetic (UD) and controlled diabetic (CD). A critical size calvarial defect (CSD) was created at the mid-portion of one parietal bone, and it was treated with a double layer of e-PTFE membrane presenting 0.5 mm perforations. The animals were killed at 7 and 30 days of healing, and qualitative and quantitative histological evaluations were performed. Data were compared with the ones previously obtained from other 30 animals (10H, 10UD, 10 CD), where two CSDs were randomly treated with a double-layer e-PTFE occlusive membrane or left empty. RESULTS Following application of cell occlusive or cell permeable membranes, significant regeneration can be observed. However, at 30 days in the H group occlusive compared to cell permeable membranes promoted enhanced bone regeneration (83.9 ± 7.3% vs. 52.5 ± 8.6%), while no significant differences were observed within the CD and UD groups. UD led to reduced regeneration compared to H when an occlusive barrier was applied, whereas comparable outcomes to H and CD were observed when placing perforated membranes. CONCLUSION The application of cell permeable membranes may have masked the potentially adverse effect of experimental UD on bone regeneration. CLINICAL RELEVANCE Membrane porosity might contribute to modulate the bone regenerative response in UD conditions. Future studies are needed to establish the degree of porosity associated with the best regenerative outcomes as well as the underlying molecular mechanisms.
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Affiliation(s)
| | - M Retzepi
- Centre for Oral Clinical Research and Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London (QMUL), London, UK
| | - E Calciolari
- Centre for Oral Clinical Research and Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London (QMUL), London, UK
- Dental School, Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - N Donos
- Centre for Oral Clinical Research and Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London (QMUL), London, UK.
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Cho G, Moon C, Maharajan N, Ang MJ, Kim M, Jang CH. Effect of Pre-Induced Mesenchymal Stem Cell-Coated Cellulose/Collagen Nanofibrous Nerve Conduit on Regeneration of Transected Facial Nerve. Int J Mol Sci 2022; 23:ijms23147638. [PMID: 35886987 PMCID: PMC9318960 DOI: 10.3390/ijms23147638] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 07/07/2022] [Accepted: 07/08/2022] [Indexed: 02/06/2023] Open
Abstract
(1) Objective: In order to evaluate the effect of a pre-induced mesenchymal stem cell (MSC)-coated cellulose/collagen nanofibrous nerve conduit on facial nerve regeneration in a rat model both in vitro and in vivo. (2) Methods: After fabrication of the cellulose/collagen nanofibrous conduit, its lumen was coated with either MSCs or pre-induced MSCs. The nerve conduit was then applied to the defective main trunk of the facial nerve. Rats were randomly divided into three treatment groups (n = 10 in each): cellulose/collagen nanofiber (control group), cellulose/collagen nanofiber/MSCs (group I), and cellulose/collagen nanofiber/pre-induced MSCs (group II). (3) Results Fibrillation of the vibrissae of each group was observed, and action potential threshold was compared 8 weeks post-surgery. Histopathological changes were also observed. Groups I and II showed better recovery of vibrissa fibrillation than the control group. (4) Conclusions: Group II, treated with the pre-induced MSC-coated cellulose/collagen nanofibrous nerve conduit, showed the highest degree of recovery based on functional and histological evaluations.
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Affiliation(s)
- GwangWon Cho
- Department of Biology, College of Natural Science, Chosun University, Gwangju 61452, Korea; (G.C.); (N.M.)
- Department of Life Science, BK21-Plus Research Team for Bioactive Control Technology, Chosun University, Gwangju 61452, Korea
| | - Changjong Moon
- Department of Veterinary Anatomy, College of Veterinary Medicine and BK21 FOUR Program, Chonnam National University, Gwangju 61186, Korea;
| | - Nagarajan Maharajan
- Department of Biology, College of Natural Science, Chosun University, Gwangju 61452, Korea; (G.C.); (N.M.)
- Department of Life Science, BK21-Plus Research Team for Bioactive Control Technology, Chosun University, Gwangju 61452, Korea
| | - Mary Jasmin Ang
- College of Veterinary Medicine, University of the Philippines Los Baños, Los Baños 4031, Philippines;
| | - Minseong Kim
- Advanced Biomaterial Team, Medical Device Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Dong-gu 41061, Korea;
| | - Chul Ho Jang
- Department of Otolaryngology, Chonnam National University Medical School, Gwangju 61469, Korea
- Correspondence: ; Tel.: +82-62-2206774
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15
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Li Y, Wang Q, Qiu LX. [Clinical effect of semilunar-tunnel technique in guided tissue regeneration]. Zhonghua Kou Qiang Yi Xue Za Zhi 2021; 56:1237-1243. [PMID: 34915659 DOI: 10.3760/cma.j.cn112144-20210315-00119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To evaluate the clinical effectiveness, safety, short-term and long-term clinical and radiographic outcomes of a novel surgical approach, the semilunar-tunnel flap technique (SLTT), applied to guided tissue regeneration and to provide a theoretical basis for the exploration of a more minimally invasive, reliable and stable technique for periodontal tissue regeneration. Methods: Totally 20 patients, who received initial periodontal treatment in the Fourth Clinical Division of Peking University School and Hospital of Stomatology from January 2019 to June 2020, with at least 1 affected tooth in anterior region in the mouth and with intrabony defects were selected and randomly divided into two groups with 10 cases in each group. The test group used the SLTT technique and the control group used the modified papilla preserved technique (MPPT) for guided tissue regeneration. The changes in clinical indices such as clinical attachment level (CAL), probing depth (PD), bleeding index (BI), papilla height loss (PHL, distance from interproximal contact area to the zenith of the papilla), defect depth (distance from bone crest to bottom of the defect) before and 6 months after surgery were evaluated. The early wound healing index (EHI) at 2 weeks after surgery in each of the groups were observed. Results: There were significant reductions in PD [test group: (6.50±0.85) mm before and (2.10±0.74) mm after surgery, control group: (6.60±0.97) mm before and (2.40±0.70) mm after surgery], CAL [test group: (8.70±0.95) mm and (4.00±1.15) mm, control group: (8.40±1.17) mm and (4.50±1.18) mm], BI [test group: 3.00 (2.75, 3.00) and 1.00 (1.00, 2.00), control group: 3.00 (2.00, 3.00) and 1.00 (0.75, 1.25)] and defect depth [test group: (4.71±0.95) mm and (-0.20±0.85) mm, control group: (4.38±0.97) mm and (0.99±0.80) mm] between two groups after surgical treatments in 6 months (P<0.05). The changes in PHL [test group: (2.20±1.03) mm and (2.00±0.94) mm; control group: (1.80±1.23) mm and (2.10±0.99) mm] were not significant. The EHI at 2 weeks postoperation was significantly lower in the test group (1.30±0.48) than in the control group (2.10±0.99) (P=0.042) and the improvement in defect depth change was significantly higher in the test group [(4.91±1.18) mm] than in the control group [(3.39±0.95) mm] (P<0.05). The radiographic bone fill rate in test group (1.05±0.17) was significantly higher than that in the control group (0.78±0.14) (P=0.001). There were no significant differences in the PD, CAL, BI, and PHL change between the test and control groups. Conclusions: The SLTT technique applied to guided tissue regeneration was safe and effective. The technique allowed overgrafting in the bone defect area, obtained more effective hard tissue regeneration and achieved possibly better postoperative aesthetic results.
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Affiliation(s)
- Y Li
- Fourth Clinical Division, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100025, China
| | - Q Wang
- Fourth Clinical Division, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100025, China
| | - L X Qiu
- Fourth Clinical Division, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100025, China
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16
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Jin F, Li T, Yuan T, Du L, Lai C, Wu Q, Zhao Y, Sun F, Gu L, Wang T, Feng ZQ. Physiologically Self-Regulated, Fully Implantable, Battery-Free System for Peripheral Nerve Restoration. Adv Mater 2021; 33:e2104175. [PMID: 34608668 DOI: 10.1002/adma.202104175] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/14/2021] [Indexed: 06/13/2023]
Abstract
The long-segment peripheral nerve injury (PNI) represents a global medical challenge, leading to incomplete nerve tissue recovery and unsatisfactory functional reconstruction. However, the current electrical stimulation (ES) apparatuses fail perfect nerve repair due to their inability of the variable synchronous self-regulated function with physiological states. It is urgent to develop an implantable ES platform with physiologically adaptive function to provide instantaneous and nerve-preferred ES. Here, a physiologically self-regulated electrical signal is generated by integrating a novel tribo/piezoelectric hybrid nanogenerator with a nanoporous nerve guide conduit to construct a fully implantable neural electrical stimulation (FI-NES) system. The optimal neural ES parameters completely originate from the body itself and are highly self-responsive to different physiological states. The morphological evaluation, representative protein expression level, and functional reconstruction of the regenerated nerves are conducted to assess the PNI recovery process. Evidence shows that the recovery effect of 15 mm length nerve defects under the guidance of the FI-NES system is significantly close to the autograft. The designed FI-NES system provides an effective method for long-term accelerating the recovery of PNI in vivo and is also appropriate for other tissue injury or neurodegenerative diseases.
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Affiliation(s)
- Fei Jin
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Tong Li
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Tao Yuan
- Department of Orthopedic, Nanjing Jinling Hospital, Nanjing, 210002, P. R. China
| | - Lijuan Du
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Chengteng Lai
- Department of Orthopedic, Nanjing Jinling Hospital, Nanjing, 210002, P. R. China
- Medical School of Nanjing University, Nanjing University, Nanjing, 210002, P. R. China
| | - Qi Wu
- Department of Orthopedic, Nanjing Jinling Hospital, Nanjing, 210002, P. R. China
- Medical School of Nanjing University, Nanjing University, Nanjing, 210002, P. R. China
| | - Ying Zhao
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Fengyu Sun
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Long Gu
- School of Advanced Materials and Nanotechnology, Xidian University, Xi'an, 710071, P. R. China
| | - Ting Wang
- State Key Laboratory of Bioelectronics, Southeast University, Nanjing, 210096, P. R. China
| | - Zhang-Qi Feng
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
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Qi Y, Yao X, Du X, An S. Local anesthetic lidocaine-encapsulated polymyxin-chitosan nanoparticles delivery for wound healing: in vitro and in vivo tissue regeneration. Drug Deliv 2021; 28:285-292. [PMID: 33501867 PMCID: PMC7850372 DOI: 10.1080/10717544.2020.1870021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 12/24/2020] [Indexed: 01/19/2023] Open
Abstract
In relieving local pains, lidocaine, one of ester-type local anesthetics, has been used. To develop the lidocaine membranes of enhanced local anesthetic effects, we have designed to establish the composition of wound dressings based on lidocaine chloride (LCH) (anesthetic drug)-loaded chitosan (CS)/polymyxin B sulfate (PMB). The LCH membranes (LCH-CS/PMB) was fabricated by the LCH oxide solutions within the CS/PMB matrix. The influences of different experimental limitations on CS/PMB membrane formations were examined. The double membrane particle sizes were evaluated by scanning electron microscopy (HR-SEM). Additionally, antibacterial efficacy was developed for gram-positive and negative microorganisms. Moreover, we examined in vivo healing of skin wounds formed in mouse models over 16 days. In contrast to the untreated wounds, rapid healing was perceived in the LCH-CS/PMB-treated wound with less damaging. These findings indicate that LCH-CS/PMB-based bandaging materials could be a potential innovative biomaterial for tissue repair and regeneration for wound healing applications in an animal model.
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Affiliation(s)
- Yanyan Qi
- Department of Anesthesiology, Henan Province People’s Hospital, Zhengzhou, China
| | - Xiangyan Yao
- Department of Anesthesiology, Henan Province People’s Hospital, Zhengzhou, China
| | - Xianhui Du
- Department of Anesthesiology, Henan Province People’s Hospital, Zhengzhou, China
| | - Songtao An
- Department of Cardiology, Fuwai Central Cardiovascular Hospital, Henan Provincial People's Hospital, Zhengzhou, China
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Jung O, Hesse B, Stojanovic S, Seim C, Weitkamp T, Batinic M, Goerke O, Kačarević ŽP, Rider P, Najman S, Barbeck M. Biocompatibility Analyses of HF-Passivated Magnesium Screws for Guided Bone Regeneration (GBR). Int J Mol Sci 2021; 22:ijms222212567. [PMID: 34830451 PMCID: PMC8624161 DOI: 10.3390/ijms222212567] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 11/19/2021] [Accepted: 11/19/2021] [Indexed: 11/17/2022] Open
Abstract
Background: Magnesium (Mg) is one of the most promising materials for human use in surgery due to material characteristics such as its elastic modulus as well as its resorbable and regenerative properties. In this study, HF-coated and uncoated novel bioresorbable magnesium fixation screws for maxillofacial and dental surgical applications were investigated in vitro and in vivo to evaluate the biocompatibility of the HF coating. Methods: Mg alloy screws that had either undergone a surface treatment with hydrofluoric-acid (HF) or left untreated were investigated. In vitro investigation included XTT, BrdU and LDH in accordance with the DIN ISO 10993-5/-12. In vivo, the screws were implanted into the tibia of rabbits. After 3 and 6 weeks, degradation, local tissue reactions and bony integration were analyzed histopathologically and histomorphometrically. Additionally, SEM/EDX analysis and synchrotron phase-contrast microtomography (µCT) measurements were conducted. The in vitro analyses revealed that the Mg screws are cytocompatible, with improved results when the surface had been passivated with HF. In vivo, the HF-treated Mg screws implanted showed a reduction in gas formation, slower biodegradation and a better bony integration in comparison to the untreated Mg screws. Histopathologically, the HF-passivated screws induced a layer of macrophages as part of its biodegradation process, whereas the untreated screws caused a slight fibrous tissue reaction. SEM/EDX analysis showed that both screws formed a similar layer of calcium phosphates on their surfaces and were surrounded by bone. Furthermore, the µCT revealed the presence of a metallic core of the screws, a faster absorbing corrosion front and a slow absorbing region of corroded magnesium. Conclusions: Overall, the HF-passivated Mg fixation screws showed significantly better biocompatibility in vitro and in vivo compared to the untreated screws.
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Affiliation(s)
- Ole Jung
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany;
| | | | - Sanja Stojanovic
- Department of Biology and Human Genetics, Faculty of Medicine, University of Niš, 18108 Niš, Serbia; (S.S.); (S.N.)
- Scientific Research Center for Biomedicine, Faculty of Medicine, Department for Cell and Tissue Engineering, University of Niš, 18108 Niš, Serbia
| | | | - Timm Weitkamp
- Synchrotron SOLEIL, Gif-sur-Yvette, 91190 Saint-Aubin, France;
| | - Milijana Batinic
- Department of Ceramic Materials, Chair of Advanced Ceramic Materials, Institute for Materials Science and Technologies, Technical University of Berlin, 10623 Berlin, Germany; (M.B.); (O.G.)
- Department of Anatomy Histology, Embryology, Pathology Anatomy and Pathology Histology, Faculty of Dental Medicine and Health, University of Osijek, 31000 Osijek, Croatia;
| | - Oliver Goerke
- Department of Ceramic Materials, Chair of Advanced Ceramic Materials, Institute for Materials Science and Technologies, Technical University of Berlin, 10623 Berlin, Germany; (M.B.); (O.G.)
| | - Željka Perić Kačarević
- Department of Anatomy Histology, Embryology, Pathology Anatomy and Pathology Histology, Faculty of Dental Medicine and Health, University of Osijek, 31000 Osijek, Croatia;
| | - Patrick Rider
- Department of Anatomy Histology, Embryology, Pathology Anatomy and Pathology Histology, Faculty of Dental Medicine and Health, University of Osijek, 31000 Osijek, Croatia;
| | - Stevo Najman
- Department of Biology and Human Genetics, Faculty of Medicine, University of Niš, 18108 Niš, Serbia; (S.S.); (S.N.)
- Scientific Research Center for Biomedicine, Faculty of Medicine, Department for Cell and Tissue Engineering, University of Niš, 18108 Niš, Serbia
| | - Mike Barbeck
- Department of Anatomy Histology, Embryology, Pathology Anatomy and Pathology Histology, Faculty of Dental Medicine and Health, University of Osijek, 31000 Osijek, Croatia;
- Correspondence: ; Tel.: +49-176-810-224-6
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Parker BJ, Rhodes DI, O'Brien CM, Rodda AE, Cameron NR. Nerve guidance conduit development for primary treatment of peripheral nerve transection injuries: A commercial perspective. Acta Biomater 2021; 135:64-86. [PMID: 34492374 DOI: 10.1016/j.actbio.2021.08.052] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 08/19/2021] [Accepted: 08/30/2021] [Indexed: 12/17/2022]
Abstract
Commercial nerve guidance conduits (NGCs) for repair of peripheral nerve discontinuities are of little use in gaps larger than 30 mm, and for smaller gaps they often fail to compete with the autografts that they are designed to replace. While recent research to develop new technologies for use in NGCs has produced many advanced designs with seemingly positive functional outcomes in animal models, these advances have not been translated into viable clinical products. While there have been many detailed reviews of the technologies available for creating NGCs, none of these have focussed on the requirements of the commercialisation process which are vital to ensure the translation of a technology from bench to clinic. Consideration of the factors essential for commercial viability, including regulatory clearance, reimbursement processes, manufacturability and scale up, and quality management early in the design process is vital in giving new technologies the best chance at achieving real-world impact. Here we have attempted to summarise the major components to consider during the development of emerging NGC technologies as a guide for those looking to develop new technology in this domain. We also examine a selection of the latest academic developments from the viewpoint of clinical translation, and discuss areas where we believe further work would be most likely to bring new NGC technologies to the clinic. STATEMENT OF SIGNIFICANCE: NGCs for peripheral nerve repairs represent an adaptable foundation with potential to incorporate modifications to improve nerve regeneration outcomes. In this review we outline the regulatory processes that functionally distinct NGCs may need to address and explore new modifications and the complications that may need to be addressed during the translation process from bench to clinic.
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Affiliation(s)
- Bradyn J Parker
- Department of Materials Science and Engineering, Monash University, 22 Alliance Lane, Clayton, Victoria 3800, Australia; Commonwealth Scientific and Industrial Research Organisation (CSIRO) Manufacturing, Research Way, Clayton, Victoria 3168, Australia
| | - David I Rhodes
- Department of Materials Science and Engineering, Monash University, 22 Alliance Lane, Clayton, Victoria 3800, Australia; ReNerve Pty. Ltd., Brunswick East 3057, Australia
| | - Carmel M O'Brien
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Manufacturing, Research Way, Clayton, Victoria 3168, Australia; Australian Regenerative Medicine Institute, Science, Technology, Research and innovation Precinct (STRIP), Monash University, Wellington Road, Clayton, Victoria 3800, Australia
| | - Andrew E Rodda
- Department of Materials Science and Engineering, Monash University, 22 Alliance Lane, Clayton, Victoria 3800, Australia
| | - Neil R Cameron
- Department of Materials Science and Engineering, Monash University, 22 Alliance Lane, Clayton, Victoria 3800, Australia; School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom.
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20
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Zhang S, Wang J, Zheng Z, Yan J, Zhang L, Li Y, Zhang J, Li G, Wang X, Kaplan D. Porous nerve guidance conduits reinforced with braided composite structures of silk/magnesium filaments for peripheral nerve repair. Acta Biomater 2021; 134:116-130. [PMID: 34289421 DOI: 10.1016/j.actbio.2021.07.028] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 07/05/2021] [Accepted: 07/13/2021] [Indexed: 02/06/2023]
Abstract
Peripheral nerve repair is a common but challenging surgical treatment. Many artificial nerve grafts have been developed, including nerve guidance conduits (NGCs) with biocompatibility, suitable mechanical properties and topography to guide axon growth. However, there remains a need to promote nerve regeneration and accelerate functional recovery using NGCs for nerve reconstruction. Here, silk fibroin (SF) and magnesium (S/Mg) filaments were braided into an inner layer of NGC and freeze-dried with a solution of SF and chitosan (CS). The mechanical stress of these S/Mg-SF/CS conduits reached 2.8 ± 0.2 N and possessed high compression strength. The conduits were evaluated with subcutaneous implantation. Sustainable mechanical function was demonstrated when used to repair 10 mm sciatic nerve gaps in rats. The hollow NGCs improved neurochemotaxis from the damaged nerves. The wet weight ratio of the gastrocnemius muscle, a target muscle for the sciatic nerve related to motor and sensory functions in the NGC group, reached 83.5% of that in the autologous group in 8 weeks; the nerve ports at both ends of the NGC grew well. When the distal end of the regenerated nerve was observed by Transmission Electron Microscopy (TEM), there was no significance difference in the diameter and thickness of the myelin sheath of the distal nerve between the autograft and S/Mg-SF/CS group, indicating that S/Mg-SF/CS NGC in this study promoted the growth of damaged nerves and provided appropriate physio mechanical guidance, thus suggesting potential utility for this approach in artificial nerve transplantation. STATEMENT OF SIGNIFICANCE: 1. Porous nerve guidance conduits (NGCs) is reinforced by a braided composite structure consisting of silk/magnesium filaments, which provides the NGC with appropriate physio-mechanical guidance as well as sufficient stability to support the biological micro-environment during early-stages of nerve regeneration and functional recovery. 2. Sufficient mechanical properties, biocompatibility with Schwan cells and good performance after sciatic nerve transplantation demonstrates that the S/Mg-SF/CS NGC in this study promotes the growth of damaged nerves and provides a suitable physio-mechanical guide for potential in artificial nerve transplantation. 3. A facile scalable manufacturing process is achieved by utilizing multidisciplinary engineering, such as textile technologies, biomaterial engineering and medical science.
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Affiliation(s)
- Shujun Zhang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Jing Wang
- Laboratory animal center of Soochow University, Suzhou 215123, China
| | - Zhaozhu Zheng
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Jia Yan
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Li Zhang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
| | - Yi Li
- School of Materials, The University of Manchester, Manchester M13 9PL, UK
| | - Jiaheng Zhang
- Research Centre of Printed Flexible Electronics, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, PR China
| | - Gang Li
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China.
| | - Xiaoqin Wang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China.
| | - David Kaplan
- Department of Biomedical Engineering, 4 Colby Street, Tufts University, Medford, MA 02155, USA.
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21
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Wang X, Steinberg T, Dieterle MP, Ramminger I, Husari A, Tomakidi P. FAK Shutdown: Consequences on Epithelial Morphogenesis and Biomarker Expression Involving an Innovative Biomaterial for Tissue Regeneration. Int J Mol Sci 2021; 22:ijms22189774. [PMID: 34575938 PMCID: PMC8470904 DOI: 10.3390/ijms22189774] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 08/31/2021] [Accepted: 09/06/2021] [Indexed: 01/14/2023] Open
Abstract
By employing an innovative biohybrid membrane, the present study aimed at elucidating the mechanistic role of the focal adhesion kinase (FAK) in epithelial morphogenesis in vitro over 4, 7, and 10 days. The consequences of siRNA-mediated FAK knockdown on epithelial morphogenesis were monitored by quantifying cell layers and detecting the expression of biomarkers of epithelial differentiation and homeostasis. Histologic examination of FAK-depleted samples showed a significant increase in cell layers resembling epithelial hyperplasia. Semiquantitative fluorescence imaging (SQFI) revealed tissue homeostatic disturbances by significantly increased involucrin expression over time, persistence of yes-associated protein (YAP) and an increase of keratin (K) 1 at day 4. The dysbalanced involucrin pattern was underscored by ROCK-IISer1366 activity at day 7 and 10. SQFI data were confirmed by quantitative PCR and Western blot analysis, thereby corroborating the FAK shutdown-related expression changes. The artificial FAK shutdown was also associated with a significantly higher expression of filaggrin at day 10, sustained keratinocyte proliferation, and the dysregulated expression of K19 and vimentin. These siRNA-induced consequences indicate the mechanistic role of FAK in epithelial morphogenesis by simultaneously considering prospective biomaterial-based epithelial regenerative approaches.
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Affiliation(s)
- Xiaoling Wang
- Center for Dental Medicine, Division of Oral Biotechnology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetterstr. 55, 79106 Freiburg, Germany; (X.W.); (M.P.D.); (I.R.); (P.T.)
| | - Thorsten Steinberg
- Center for Dental Medicine, Division of Oral Biotechnology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetterstr. 55, 79106 Freiburg, Germany; (X.W.); (M.P.D.); (I.R.); (P.T.)
- Correspondence:
| | - Martin P. Dieterle
- Center for Dental Medicine, Division of Oral Biotechnology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetterstr. 55, 79106 Freiburg, Germany; (X.W.); (M.P.D.); (I.R.); (P.T.)
| | - Imke Ramminger
- Center for Dental Medicine, Division of Oral Biotechnology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetterstr. 55, 79106 Freiburg, Germany; (X.W.); (M.P.D.); (I.R.); (P.T.)
- Faculty of Biology, University of Freiburg, Schaenzlestr. 1, 79104 Freiburg, Germany
| | - Ayman Husari
- Center for Dental Medicine, Department of Orthodontics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetterstr. 55, 79106 Freiburg, Germany;
| | - Pascal Tomakidi
- Center for Dental Medicine, Division of Oral Biotechnology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetterstr. 55, 79106 Freiburg, Germany; (X.W.); (M.P.D.); (I.R.); (P.T.)
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22
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Lu Q, Zhang F, Cheng W, Gao X, Ding Z, Zhang X, Lu Q, Kaplan DL. Nerve Guidance Conduits with Hierarchical Anisotropic Architecture for Peripheral Nerve Regeneration. Adv Healthc Mater 2021; 10:e2100427. [PMID: 34038626 PMCID: PMC8295195 DOI: 10.1002/adhm.202100427] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 04/15/2021] [Indexed: 12/24/2022]
Abstract
Nerve guidance conduits with multifunctional features could offer microenvironments for improved nerve regeneration and functional recovery. However, the challenge remains to optimize multiple cues in nerve conduit systems due to the interplay of these factors during fabrication. Here, a modular assembly for the fabrication of nerve conduits is utilized to address the goal of incorporating multifunctional guidance cues for nerve regeneration. Silk-based hollow conduits with suitable size and mechanical properties, along with silk nanofiber fillers with tunable hierarchical anisotropic architectures and microporous structures, are developed and assembled into conduits. These conduits supported improves nerve regeneration in terms of cell proliferation (Schwann and PC12 cells) and growth factor secretion (BDNF, brain-derived neurotrophic factor) in vitro, and the in vivo repair and functional recovery of rat sciatic nerve defects. Nerve regeneration using these new conduit designs is comparable to autografts, providing a path towards future clinical impact.
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Affiliation(s)
- Qingqing Lu
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P. R. China
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou, 215123, P. R. China
| | - Feng Zhang
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P. R. China
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou, 215123, P. R. China
| | - Weinan Cheng
- Department of Orthopedics, The First Affiliated Hospital of Xiamen University, Xiamen, 361000, P. R. China
| | - Xiang Gao
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P. R. China
| | - Zhaozhao Ding
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P. R. China
| | - Xiaoyi Zhang
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P. R. China
| | - Qiang Lu
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P. R. China
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA
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23
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Affiliation(s)
- Michael G Monaghan
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, and Department of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland; Advanced Materials and Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland; CÚRAM, Centre for Research in Medical Devices, National University of Ireland, Galway, Ireland
| | - Ciara M Murphy
- Tissue Engineering Research Group, Department of Anatomy and Regenerative Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland; Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland; Advanced Materials and Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland.
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24
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Mengsteab PY, Otsuka T, McClinton A, Shemshaki NS, Shah S, Kan HM, Obopilwe E, Vella AT, Nair LS, Laurencin CT. Mechanically superior matrices promote osteointegration and regeneration of anterior cruciate ligament tissue in rabbits. Proc Natl Acad Sci U S A 2020; 117:28655-28666. [PMID: 33144508 PMCID: PMC7682397 DOI: 10.1073/pnas.2012347117] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The gold standard treatment for anterior cruciate ligament (ACL) reconstruction is the use of tendon autografts and allografts. Limiting factors for this treatment include donor site morbidity, potential disease transmission, and variable graft quality. To address these limitations, we previously developed an off-the-shelf alternative, a poly(l-lactic) acid (PLLA) bioengineered ACL matrix, and demonstrated its feasibility to regenerate ACL tissue. This study aims to 1) accelerate the rate of regeneration using the bioengineered ACL matrix by supplementation with bone marrow aspirate concentrate (BMAC) and growth factors (BMP-2, FGF-2, and FGF-8) and 2) increase matrix strength retention. Histological evaluation showed robust tissue regeneration in all groups. The presence of cuboidal cells reminiscent of ACL fibroblasts and chondrocytes surrounded by an extracellular matrix rich in anionic macromolecules was up-regulated in the BMAC group. This was not observed in previous studies and is indicative of enhanced regeneration. Additionally, intraarticular treatment with FGF-2 and FGF-8 was found to suppress joint inflammation. To increase matrix strength retention, we incorporated nondegradable fibers, polyethylene terephthalate (PET), into the PLLA bioengineered ACL matrix to fabricate a "tiger graft." The tiger graft demonstrated the greatest peak loads among the experimental groups and the highest to date in a rabbit model. Moreover, the tiger graft showed superior osteointegration, making it an ideal bioengineered ACL matrix. The results of this study illustrate the beneficial effect bioactive factors and PET incorporation have on ACL regeneration and signal a promising step toward the clinical translation of a functional bioengineered ACL matrix.
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Affiliation(s)
- Paulos Y Mengsteab
- Connecticut Convergence Institute for Translation in Regenerative Engineering, University of Connecticut Health, Farmington, CT 06030
- Raymond and Beverly Sackler Center for Biological, Physical and Engineering Sciences, University of Connecticut Health, Farmington, CT 06030
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269
| | - Takayoshi Otsuka
- Connecticut Convergence Institute for Translation in Regenerative Engineering, University of Connecticut Health, Farmington, CT 06030
- Raymond and Beverly Sackler Center for Biological, Physical and Engineering Sciences, University of Connecticut Health, Farmington, CT 06030
| | - Aneesah McClinton
- Connecticut Convergence Institute for Translation in Regenerative Engineering, University of Connecticut Health, Farmington, CT 06030
- Raymond and Beverly Sackler Center for Biological, Physical and Engineering Sciences, University of Connecticut Health, Farmington, CT 06030
- Department of Surgery, University of Connecticut School of Medicine, Farmington, CT, 06030
| | - Nikoo Saveh Shemshaki
- Connecticut Convergence Institute for Translation in Regenerative Engineering, University of Connecticut Health, Farmington, CT 06030
- Raymond and Beverly Sackler Center for Biological, Physical and Engineering Sciences, University of Connecticut Health, Farmington, CT 06030
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269
| | - Shiv Shah
- Connecticut Convergence Institute for Translation in Regenerative Engineering, University of Connecticut Health, Farmington, CT 06030
- Raymond and Beverly Sackler Center for Biological, Physical and Engineering Sciences, University of Connecticut Health, Farmington, CT 06030
- Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269
| | - Ho-Man Kan
- Connecticut Convergence Institute for Translation in Regenerative Engineering, University of Connecticut Health, Farmington, CT 06030
- Raymond and Beverly Sackler Center for Biological, Physical and Engineering Sciences, University of Connecticut Health, Farmington, CT 06030
| | - Elifho Obopilwe
- Department of Orthopedic Surgery, University of Connecticut Health, Farmington, CT 06030
| | - Anthony T Vella
- Department of Immunology, University of Connecticut School of Medicine, Farmington, CT 06030
| | - Lakshmi S Nair
- Connecticut Convergence Institute for Translation in Regenerative Engineering, University of Connecticut Health, Farmington, CT 06030
- Raymond and Beverly Sackler Center for Biological, Physical and Engineering Sciences, University of Connecticut Health, Farmington, CT 06030
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269
- Department of Orthopedic Surgery, University of Connecticut Health, Farmington, CT 06030
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269
| | - Cato T Laurencin
- Connecticut Convergence Institute for Translation in Regenerative Engineering, University of Connecticut Health, Farmington, CT 06030;
- Raymond and Beverly Sackler Center for Biological, Physical and Engineering Sciences, University of Connecticut Health, Farmington, CT 06030
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269
- Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269
- Department of Orthopedic Surgery, University of Connecticut Health, Farmington, CT 06030
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269
- Department of Reconstructive Sciences, University of Connecticut Health Center, Farmington, CT 06030
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25
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Abstract
PURPOSE OF REVIEW Bone regeneration plays an important role in contemporary clinical treatment. Bone tissue engineering should result in successful bone regeneration to restore congenital or acquired bone defects in the human skeleton. Osteocytes are thought to have a governing role in bone remodeling by regulating osteoclast and osteoblast activity, and thus bone loss and formation. In this review, we address the so far largely unknown role osteocytes may play in bone tissue regeneration. RECENT FINDINGS Osteocytes release biochemical signaling molecules involved in bone remodeling such as prostaglandins, nitric oxide, Wnts, and insulin-like growth factor-1 (IGF-1). Treatment of mesenchymal stem cells in bone tissue engineering with prostaglandins (e.g., PGE2, PGI2, PGF2α), nitric oxide, IGF-1, or Wnts (e.g., Wnt3a) improves osteogenesis. This review provides an overview of the functions of osteocytes in bone tissue, their interaction with other bone cells, and their role in bone remodeling. We postulate that osteocytes may have a pivotal role in bone regeneration as well, and consequently that the bone regeneration process may be improved effectively and rapidly if osteocytes are optimally used and stimulated.
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Affiliation(s)
- Wei Cao
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
- Department of Oral and Maxillofacial Surgery/Oral Pathology, Amsterdam University Medical Centers and Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands
| | - Marco N Helder
- Department of Oral and Maxillofacial Surgery/Oral Pathology, Amsterdam University Medical Centers and Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands
| | - Nathalie Bravenboer
- Department of Clinical Chemistry, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Gang Wu
- Department of Oral Implantology and Prosthetic Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Jianfeng Jin
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
- Laboratory for Myology, Faculty of Behavioral and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Christiaan M Ten Bruggenkate
- Department of Oral and Maxillofacial Surgery/Oral Pathology, Amsterdam University Medical Centers and Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands
| | - Jenneke Klein-Nulend
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Engelbert A J M Schulten
- Department of Oral and Maxillofacial Surgery/Oral Pathology, Amsterdam University Medical Centers and Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands.
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26
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Abstract
PURPOSE OF REVIEW The purpose of this review is to illustrate the current state of 3D printing (3DP) technology used in biomedical industry towards bone regeneration. We have focused our efforts towards correlating materials and structural design aspects of 3DP with biological response from host tissue upon implantation. The primary question that we have tried to address is-can 3DP be a viable technology platform for bone regeneration devices? RECENT FINDINGS Recent findings show that 3DP is a versatile technology platform for numerous materials for mass customizable bone regeneration devices that are also getting approval from different regulatory bodies worldwide. After a brief introduction of different 3DP technologies, this review elaborates 3DP of different materials and devices for bone regeneration. From cell-based bioprinting to acellular patient-matched metallic or ceramic devices, 3DP has tremendous potential to improve the quality of human life through bone regeneration among patients of all ages.
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Affiliation(s)
- Amit Bandyopadhyay
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164-2920, USA.
| | - Indranath Mitra
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164-2920, USA
| | - Susmita Bose
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164-2920, USA
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27
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Bueno J, Sánchez MC, Toledano-Osorio M, Figuero E, Toledano M, Medina-Castillo AL, Osorio R, Herrera D, Sanz M. Antimicrobial effect of nanostructured membranes for guided tissue regeneration: an in vitro study. Dent Mater 2020; 36:1566-1577. [PMID: 33010943 DOI: 10.1016/j.dental.2020.09.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 07/26/2020] [Accepted: 09/10/2020] [Indexed: 12/14/2022]
Abstract
OBJECTIVE The purpose of this in vitro study was to evaluate the antibacterial effect of a novel non-resorbable, bioactive polymeric nanostructured membrane (NMs), when doped with zinc, calcium and doxycycline. METHODS A validated in vitro subgingival biofilm model with six bacterial species (Streptococcus oralis, Actinomyces naeslundii, Veillonela parvula, Fusobacterium nucleatum, Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans) was used. The experimental NMs, with and without being doped with doxycycline, calcium and zinc, were placed on hydroxyapatite (HA) discs. As positive control membranes, commercially available dense polytetrafluoroethylene (d-PTFE) membranes were used and, as negative controls, the HA discs without any membrane. The experimental, positive and negative control discs were exposed to a mixed bacterial suspension, at 37 °C under anaerobic conditions, during 12, 24, 48 and 72 h. The resulting biofilms were analyzed through scanning electron microscopy (SEM), to study their structure, and by quantitative polymerase chain reaction (qPCR), to assess the bacterial load, expressed as colony forming units (CFU) per mL. Differences between experimental and control groups were evaluated with the general linear model and the Bonferroni adjustment. RESULTS As shown by SEM, all membrane groups, except the NMs with doxycycline, resulted in structured biofilms from 12-72 hours. Similarly, only the membranes loaded with doxycycline demonstrated a significant reduction in bacterial load during biofilm development, when compared with the control groups (p < 0.001). SIGNIFICANCE Doxycycline-doped nanostructured membranes have an impact on biofilm growth dynamics by significant reducing the bacterial load.
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Affiliation(s)
- J Bueno
- ETEP (Etiology and Therapy of Periodontal Diseases) Research Group, University Complutense, Madrid, Spain
| | - M C Sánchez
- ETEP (Etiology and Therapy of Periodontal Diseases) Research Group, University Complutense, Madrid, Spain
| | - M Toledano-Osorio
- Biomaterials in Dentistry Research Group, University of Granada, Spain
| | - E Figuero
- ETEP (Etiology and Therapy of Periodontal Diseases) Research Group, University Complutense, Madrid, Spain
| | - M Toledano
- Biomaterials in Dentistry Research Group, University of Granada, Spain
| | - A L Medina-Castillo
- NanoMyP. Spin-Off Enterprise from University of Granada, Edificio BIC-Granada, Av. Innovación 1. 18016 Armilla, Granada, Spain
| | - R Osorio
- Biomaterials in Dentistry Research Group, University of Granada, Spain.
| | - D Herrera
- ETEP (Etiology and Therapy of Periodontal Diseases) Research Group, University Complutense, Madrid, Spain
| | - M Sanz
- ETEP (Etiology and Therapy of Periodontal Diseases) Research Group, University Complutense, Madrid, Spain
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28
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Chang KC, Chen WC, Chen CH, Ko CL, Liu SM, Chen JC. Chemical cross-linking on gelatin-hyaluronan loaded with hinokitiol for the preparation of guided tissue regeneration hydrogel membranes with antibacterial and biocompatible properties. Mater Sci Eng C Mater Biol Appl 2020; 119:111576. [PMID: 33321622 DOI: 10.1016/j.msec.2020.111576] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 09/21/2020] [Accepted: 09/25/2020] [Indexed: 12/14/2022]
Abstract
The mechanical properties and structural stability of hydrogels and their performance in antidegradation can be enhanced by cross-linking them with N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride (EDC). However, residual EDC compromises the biocompatibility of cross-linked hydrogels and the formability of un-cross-linked hydrogels. In this study, a facile process for preparing hydrogel regenerative membranes exerting antibacterial effects and containing gelatin/hyaluronic acid (G/HA) through solution casting was proposed. The membranes were cross-linked with EDC (G/HA-Ec-0H) and impregnated with two concentrations of the antibacterial agent of hinokitiol (G/HA-Ec-2H and G/HA-Ec-4H). Amide bonds formed, and the rate of active amino acid fixation was higher than 90%, which was directly proportional to the degree of cross-linking. The G/HA-Ec-2H and G/HA-Ec-4H groups with hinokitiol showed good antibacterial properties. The rate of hydrogel degradation decreased, and the integrity of sample morphology was maintained at more than 80% for over 3 days in the immersion. Then, the hydrogel structures relaxed and disintegrated through a rapid degradation reaction within 24 h. The biocompatibility results showed that low concentrations of hinokitiol did not affect cell viability. Moreover, hydrogel membranes after 14 days of cell incubation showed good cell adhesion and proliferation. In summary, the membrane biostability of the cross-linked gelatin/hyaluronan hydrogels was enhanced by EDC at a biocompatible concentration, and the functionalized group of G/HA-Ec-2H shows potential as a biodegradable material for biocompatible tissue-guarded regeneration membranes with antibacterial properties.
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Affiliation(s)
- Kai-Chi Chang
- Advanced Medical Devices and Composites Laboratory, Department of Fiber and Composite Materials, Feng Chia University, Taichung 407, Taiwan
| | - Wen-Cheng Chen
- Advanced Medical Devices and Composites Laboratory, Department of Fiber and Composite Materials, Feng Chia University, Taichung 407, Taiwan; Department of Fragrance and Cosmetic Science, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan.
| | - Chih-Hua Chen
- Advanced Medical Devices and Composites Laboratory, Department of Fiber and Composite Materials, Feng Chia University, Taichung 407, Taiwan
| | - Chia-Ling Ko
- Advanced Medical Devices and Composites Laboratory, Department of Fiber and Composite Materials, Feng Chia University, Taichung 407, Taiwan
| | - Shih-Ming Liu
- Advanced Medical Devices and Composites Laboratory, Department of Fiber and Composite Materials, Feng Chia University, Taichung 407, Taiwan
| | - Jian-Chih Chen
- Department of Orthopedics, Faculty of Medical School, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Orthopaedics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
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Lin YH, Kang L, Feng WH, Cheng TL, Tsai WC, Huang HT, Lee HC, Chen CH. Effects of Lipids and Lipoproteins on Mesenchymal Stem Cells Used in Cardiac Tissue Regeneration. Int J Mol Sci 2020; 21:ijms21134770. [PMID: 32635662 PMCID: PMC7369828 DOI: 10.3390/ijms21134770] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/01/2020] [Accepted: 07/03/2020] [Indexed: 02/06/2023] Open
Abstract
Mesenchymal stem cells (MSCs) have two characteristics of interest for this paper: the ability to self-renew, and the potential for multiple-lineage differentiation into various cells. MSCs have been used in cardiac tissue regeneration for over a decade. Adult cardiac tissue regeneration ability is quite low; it cannot repair itself after injury, as the heart cells are replaced by fibroblasts and lose function. It is therefore important to search for a feasible way to repair and restore heart function through stem cell therapy. Stem cells can differentiate and provide a source of progenitor cells for cardiomyocytes, endothelial cells, and supporting cells. Studies have shown that the concentrations of blood lipids and lipoproteins affect cardiovascular diseases, such as atherosclerosis, hypertension, and obesity. Furthermore, the MSC lipid profiles, such as the triglyceride and cholesterol content, have been revealed by lipidomics, as well as their correlation with MSC differentiation. Abnormal blood lipids can cause serious damage to internal organs, especially heart tissue. In the past decade, the accumulated literature has indicated that lipids/lipoproteins affect stem cell behavior and biological functions, including their multiple lineage capability, and in turn affect the outcome of regenerative medicine. This review will focus on the effect of lipids/lipoproteins on MSC cardiac regenerative medicine, as well as the effect of lipid-lowering drugs in promoting cardiomyogenesis-associated MSC differentiation.
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Affiliation(s)
- Yi-Hsiung Lin
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (Y.-H.L.); (W.-H.F.); (W.-C.T.)
- Lipid Science and Aging Research Center, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Lin Kang
- Department of Obstetrics and Gynecology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan;
| | - Wen-Han Feng
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (Y.-H.L.); (W.-H.F.); (W.-C.T.)
- Department of Internal Medicine, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 801, Taiwan
| | - Tsung-Lin Cheng
- Orthopaedic Research Center, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (T.-L.C.); (H.-T.H.)
- Regeneration Medicine and Cell Therapy Research Center, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Physiology, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Wei-Chung Tsai
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (Y.-H.L.); (W.-H.F.); (W.-C.T.)
- Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Hsuan-Ti Huang
- Orthopaedic Research Center, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (T.-L.C.); (H.-T.H.)
- Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Orthopedics, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Departments of Orthopedics, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Orthopedics, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung 807, Taiwan
| | - Hsiang-Chun Lee
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (Y.-H.L.); (W.-H.F.); (W.-C.T.)
- Lipid Science and Aging Research Center, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Center for Lipid Biosciences, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan
- Department of Internal Medicine, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung 804, Taiwan
- Correspondence: (H.-C.L.); (C.-H.C.); Tel.: +886-7-3209209 (C.-H.C.)
| | - Chung-Hwan Chen
- Orthopaedic Research Center, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (T.-L.C.); (H.-T.H.)
- Regeneration Medicine and Cell Therapy Research Center, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Orthopedics, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Departments of Orthopedics, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Orthopedics, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung 807, Taiwan
- Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung 804, Taiwan
- Correspondence: (H.-C.L.); (C.-H.C.); Tel.: +886-7-3209209 (C.-H.C.)
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Barbeck M, Kühnel L, Witte F, Pissarek J, Precht C, Xiong X, Krastev R, Wegner N, Walther F, Jung O. Degradation, Bone Regeneration and Tissue Response of an Innovative Volume Stable Magnesium-Supported GBR/GTR Barrier Membrane. Int J Mol Sci 2020; 21:ijms21093098. [PMID: 32353983 PMCID: PMC7247710 DOI: 10.3390/ijms21093098] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/20/2020] [Accepted: 04/21/2020] [Indexed: 12/14/2022] Open
Abstract
Introduction: Bioresorbable collagenous barrier membranes are used to prevent premature soft tissue ingrowth and to allow bone regeneration. For volume stable indications, only non-absorbable synthetic materials are available. This study investigates a new bioresorbable hydrofluoric acid (HF)-treated magnesium (Mg) mesh in a native collagen membrane for volume stable situations. Materials and Methods: HF-treated and untreated Mg were compared in direct and indirect cytocompatibility assays. In vivo, 18 New Zealand White Rabbits received each four 8 mm calvarial defects and were divided into four groups: (a) HF-treated Mg mesh/collagen membrane, (b) untreated Mg mesh/collagen membrane (c) collagen membrane and (d) sham operation. After 6, 12 and 18 weeks, Mg degradation and bone regeneration was measured using radiological and histological methods. Results: In vitro, HF-treated Mg showed higher cytocompatibility. Histopathologically, HF-Mg prevented gas cavities and was degraded by mononuclear cells via phagocytosis up to 12 weeks. Untreated Mg showed partially significant more gas cavities and a fibrous tissue reaction. Bone regeneration was not significantly different between all groups. Discussion and Conclusions: HF-Mg meshes embedded in native collagen membranes represent a volume stable and biocompatible alternative to the non-absorbable synthetic materials. HF-Mg shows less corrosion and is degraded by phagocytosis. However, the application of membranes did not result in higher bone regeneration.
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Affiliation(s)
- Mike Barbeck
- Department of Oral Maxillofacial Surgery, Division of Regenerative Orofacial Medicine, Study Group: Biomaterials/Surfaces, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
- BerlinAnalytix GmbH, 12109 Berlin, Germany
- Correspondence: ; Tel.: +49-(0)-176-81022467
| | - Lennart Kühnel
- Department of Oral Maxillofacial Surgery, Division of Regenerative Orofacial Medicine, Study Group: Biomaterials/Surfaces, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Frank Witte
- Biotrics Bioimplants GmbH, 12109 Berlin, Germany
| | | | - Clarissa Precht
- Department of Oral Maxillofacial Surgery, Division of Regenerative Orofacial Medicine, Study Group: Biomaterials/Surfaces, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Xin Xiong
- NMI Natural and Medical Sciences Institute, University of Tübingen, 72770 Reutlingen, Germany
| | - Rumen Krastev
- NMI Natural and Medical Sciences Institute, University of Tübingen, 72770 Reutlingen, Germany
- Faculty of Applied Chemistry, Reutlingen University, 72762 Reutlingen, Germany
| | - Nils Wegner
- Department of Materials Test Engineering (WPT), TU Dortmund University, 44227 Dortmund, Germany
| | - Frank Walther
- Department of Materials Test Engineering (WPT), TU Dortmund University, 44227 Dortmund, Germany
| | - Ole Jung
- Department of Oral Maxillofacial Surgery, Division of Regenerative Orofacial Medicine, Study Group: Biomaterials/Surfaces, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany
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Abstract
Stereolithography (SLA) 3D bioprinting has emerged as a prominent bioprinting method addressing the requirements of complex tissue fabrication. This chapter addresses the advancement in SLA 3D bioprinting in concurrent with the development of novel photocrosslinkable biomaterials with enhanced physical and chemical properties. We discuss the cytocompatible photoinitiators operating in the wide spectrum of the ultraviolet (UV) and the visible light and high-resolution dynamic mask projection systems with a suitable illumination source. The potential of SLA 3D bioprinting has been explored in various themes, like bone and neural tissue engineering and in the development of controlled microenvironments to study cell behavior. The flexible design and versatility of SLA bioprinting makes it an attractive bioprinting process with myriad possibilities and clinical applications.
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Affiliation(s)
- Hitendra Kumar
- School of Engineering, University of British Columbia, Kelowna, BC, Canada
| | - Keekyoung Kim
- School of Engineering, University of British Columbia, Kelowna, BC, Canada.
- Department of Mechanical and Manufacturing Engineering, Schulich School of Engineering, University of Calgary, Calgary, AB, Canada.
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Qian Y, Zhou X, Zhang F, Diekwisch TG, Luan X, Yang J. Triple PLGA/PCL Scaffold Modification Including Silver Impregnation, Collagen Coating, and Electrospinning Significantly Improve Biocompatibility, Antimicrobial, and Osteogenic Properties for Orofacial Tissue Regeneration. ACS Appl Mater Interfaces 2019; 11:37381-37396. [PMID: 31517483 PMCID: PMC7220812 DOI: 10.1021/acsami.9b07053] [Citation(s) in RCA: 113] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Biodegradable synthetic scaffolds hold great promise for oral and craniofacial guided tissue regeneration and bone regeneration. To overcome the limitations of current scaffold materials in terms of osteogenic and antimicrobial properties, we have developed a novel silver-modified/collagen-coated electrospun poly-lactic-co-glycolic acid/polycaprolactone (PLGA/PCL) scaffold (PP-pDA-Ag-COL) with improved antimicrobial and osteogenic properties. Our novel scaffold was generated by electrospinning a basic PLGA/PCL matrix, followed by silver nanoparticles (AgNPs) impregnation via in situ reduction, polydopamine coating, and then coating by collagen I. The three intermediate materials involved in the fabrication of our scaffolds, namely, PLGA/PCL (PP), PLGA/PCL-polydopamine (PP-pDA), and PLGA/PCL-polydopamine-Ag (PP-pDA-Ag), were used as control scaffolds. Scanning electron micrographs and mechanical testing indicated that the unique three-dimensional structures with randomly oriented nanofibrous electrospun scaffold architectures, the elasticity modulus, and the tensile strength were maintained after modifications. CCK-8 cell proliferation analysis demonstrated that the PP-pDA-Ag-COL scaffold was associated with higher MC3T3 proliferation rates than the three control scaffolds employed. Scanning electron and fluorescence light microscopy illustrated that PP-pDA-Ag-COL scaffolds significantly enhanced MC3T3 cell adhesion compared to the control scaffolds after 12 and 24 h culture, in tandem with the highest β1 integrin expression levels, both at the mRNA level and the protein level. Alkaline phosphatase activity, BMP2, and RUNX2 expression levels of MC3T3 cells cultured on PP-pDA-Ag-COL scaffolds for 7 and 14 days were also significantly higher when compared to controls (P < 0.001). There was a wider antibacterial zone associated in PP-pDA-Ag-COL and PP-pDA-Ag scaffolds versus control scaffolds (P < 0.05), and bacterial fluorescence was reduced on the Ag-modified scaffolds after 24 h inoculation against Staphylococcus aureus and Streptococcus mutans. In a mouse periodontal disease model, the PP-pDA-Ag-COL scaffold enhanced alveolar bone regeneration (31.8%) and was effective for periodontitis treatment. These results demonstrate that our novel PP-pDA-Ag-COL scaffold enhanced biocompatibility and osteogenic and antibacterial properties and has therapeutic potential for alveolar/craniofacial bone regeneration.
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Affiliation(s)
- Yunzhu Qian
- Center of Stomatology, The Second Affiliated Hospital of Soochow University. Suzhou 215004, People’s Republic of China
| | - Xuefeng Zhou
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, People’s Republic of China
- Corresponding Author: (J.Y) , (X.Z) , (X.L)
| | - Feimin Zhang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210029, People’s Republic of China
| | - Thomas G.H. Diekwisch
- Texas A&M Center for Craniofacial Research and Diagnosis, Dallas, Texas 75246, United States
| | - Xianghong Luan
- Texas A&M Center for Craniofacial Research and Diagnosis, Dallas, Texas 75246, United States
- Corresponding Author: (J.Y) , (X.Z) , (X.L)
| | - Jianxin Yang
- Center of Stomatology, The Second Affiliated Hospital of Soochow University. Suzhou 215004, People’s Republic of China
- Corresponding Author: (J.Y) , (X.Z) , (X.L)
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Luzhansky ID, Sudlow LC, Brogan DM, Wood MD, Berezin MY. Imaging in the repair of peripheral nerve injury. Nanomedicine (Lond) 2019; 14:2659-2677. [PMID: 31612779 PMCID: PMC6886568 DOI: 10.2217/nnm-2019-0115] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 08/20/2019] [Indexed: 12/25/2022] Open
Abstract
Surgical intervention followed by physical therapy remains the major way to repair damaged nerves and restore function. Imaging constitutes promising, yet underutilized, approaches to improve surgical and postoperative techniques. Dedicated methods for imaging nerve regeneration will potentially provide surgical guidance, enable recovery monitoring and postrepair intervention, elucidate failure mechanisms and optimize preclinical procedures. Herein, we present an outline of promising innovations in imaging-based tracking of in vivo peripheral nerve regeneration. We emphasize optical imaging because of its cost, versatility, relatively low toxicity and sensitivity. We discuss the use of targeted probes and contrast agents (small molecules and nanoparticles) to facilitate nerve regeneration imaging and the engineering of grafts that could be used to track nerve repair. We also discuss how new imaging methods might overcome the most significant challenges in nerve injury treatment.
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Affiliation(s)
- Igor D Luzhansky
- Department of Radiology, Washington University School of Medicine, St Louis, MO 63110, USA
- The Institute of Materials Science & Engineering, Washington University, St Louis, MO 63130, USA
| | - Leland C Sudlow
- Department of Radiology, Washington University School of Medicine, St Louis, MO 63110, USA
| | - David M Brogan
- Department of Orthopedic Surgery, Washington University School of Medicine, St Louis, MO 63110, USA
| | - Matthew D Wood
- Department of Surgery, Washington University School of Medicine, St Louis, MO 63110, USA
| | - Mikhail Y Berezin
- Department of Radiology, Washington University School of Medicine, St Louis, MO 63110, USA
- The Institute of Materials Science & Engineering, Washington University, St Louis, MO 63130, USA
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Lin R, Deng C, Li X, Liu Y, Zhang M, Qin C, Yao Q, Wang L, Wu C. Copper-incorporated bioactive glass-ceramics inducing anti-inflammatory phenotype and regeneration of cartilage/bone interface. Theranostics 2019; 9:6300-6313. [PMID: 31534552 PMCID: PMC6735521 DOI: 10.7150/thno.36120] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Accepted: 07/29/2019] [Indexed: 12/27/2022] Open
Abstract
Osteoarthritis not only results in cartilage lesion, but also is accompanied with subchondral bone damage caused by the inflammatory response. It is of great significance to treat osteoarthritis by regulating the immune response. As copper (Cu) plays an essential role in immune response and anti-arthritis, a copper-incorporated bioactive glass-ceramics (Cu-BGC) may achieve the aim of healing cartilage lesion and reducing inflammatory response caused by osteoarthritis. We hypothesized that the Cu2+ released from Cu-BGC scaffolds may satisfy the requirements of cartilage regeneration and anti-arthritis. Methods: 3D-printing method was employed to prepare Cu-BGC scaffolds. The stimulating effect on the chondrocytes and macrophages cultured with Cu-BGC extracts was investigated. Furthermore, the in vivo regenerative effect of Cu-BGC scaffolds on osteochondral defects was studied. Results: The incorporation of Cu2+ into BGC considerably promoted the proliferation and maturation of chondrocytes, and induced macrophages shifting to anti-inflammatory phenotype. Histological analysis demonstrated that the Cu-BGC scaffolds meaningfully improved the regeneration of cartilage and elevated the recovery of the osteochondral interface as compared with the CTR and BGC groups. The potential mechanism is related to Cu2+ ions triggering the immune response of cartilage via activating HIF signaling pathway and inhibiting the inflammatory response in osteochondral tissue. Conclusion: These results demonstrated that Cu-BGC scaffolds significantly facilitated the regeneration of cartilage and osteochondral interface, as well as inhibited inflammatory response, which may prevent the development of osteoarthritis associated with osteochondral defects.
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Affiliation(s)
- Rongcai Lin
- Department of Orthopaedics, Nanjing First Hospital, Nanjing Medical University. Nanjing 210006, P.R.China
| | - Cuijun Deng
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences. Shanghai 200050, P.R.China
- Shanghai East Hospital, the Institute for Biomedical Engineering & Nano Science, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200092, P.R.China
| | - Xuxiang Li
- Department of Orthopaedics, Nanjing First Hospital, Nanjing Medical University. Nanjing 210006, P.R.China
| | - Yaqin Liu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences. Shanghai 200050, P.R.China
| | - Meng Zhang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences. Shanghai 200050, P.R.China
| | - Chen Qin
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences. Shanghai 200050, P.R.China
| | - Qingqiang Yao
- Department of Orthopaedics, Nanjing First Hospital, Nanjing Medical University. Nanjing 210006, P.R.China
| | - Liming Wang
- Department of Orthopaedics, Nanjing First Hospital, Nanjing Medical University. Nanjing 210006, P.R.China
| | - Chengtie Wu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences. Shanghai 200050, P.R.China
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Shah MB, Chang W, Zhou G, Glavy JS, Cattabiani TM, Yu X. Novel spiral structured nerve guidance conduits with multichannels and inner longitudinally aligned nanofibers for peripheral nerve regeneration. J Biomed Mater Res B Appl Biomater 2019; 107:1410-1419. [PMID: 30265781 PMCID: PMC6438778 DOI: 10.1002/jbm.b.34233] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 07/25/2018] [Accepted: 08/18/2018] [Indexed: 12/24/2022]
Abstract
Nerve guidance conduits (NGCs) are artificial substitutes for autografts, which serve as the gold standard in treating peripheral nerve injury. A recurring challenge in tissue engineered NGCs is optimizing the cross-sectional surface area to achieve a balance between allowing nerve infiltration while supporting maximum axonal extension from the proximal to distal stump. In this study, we address this issue by investigating the efficacy of an NGC with a higher cross-sectional surface composed of spiral structures and multi-channels, coupled with inner longitudinally aligned nanofibers and protein on aiding nerve repair in critical sized nerve defect. The NGCs were implanted into 15-mm-long rat sciatic nerve injury gaps for 4 weeks. Nerve regeneration was assessed using an established set of assays, including the walking track analysis, electrophysiological testing, pinch reflex assessment, gastrocnemius muscle measurement, and histological assessment. The results indicated that the novel NGC design yielded promising data in encouraging nerve regeneration within a relatively short recovery time. The performance of the novel NGC for nerve regeneration was superior to that of the control nerve conduits with tubular structures. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 1410-1419, 2019.
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Affiliation(s)
- Munish B. Shah
- Department of Biomedical Engineering, Charles V. Schaefer, Jr. School of Engineering & Science Stevens Institute of Technology, Hoboken, NJ 07030
| | - Wei Chang
- Department of Biomedical Engineering, Charles V. Schaefer, Jr. School of Engineering & Science Stevens Institute of Technology, Hoboken, NJ 07030
| | - Gan Zhou
- Department of Biomedical Engineering, Charles V. Schaefer, Jr. School of Engineering & Science Stevens Institute of Technology, Hoboken, NJ 07030
| | - Joseph S. Glavy
- Department of Pharmaceutical Sciences, Fisch College of Pharmacy, University of Tyler, Tyler, Texas 75799
| | - Thomas M. Cattabiani
- Department of Biomedical Engineering, Charles V. Schaefer, Jr. School of Engineering & Science Stevens Institute of Technology, Hoboken, NJ 07030
| | - Xiaojun Yu
- Department of Biomedical Engineering, Charles V. Schaefer, Jr. School of Engineering & Science Stevens Institute of Technology, Hoboken, NJ 07030
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Omar O, Elgali I, Dahlin C, Thomsen P. Barrier membranes: More than the barrier effect? J Clin Periodontol 2019; 46 Suppl 21:103-123. [PMID: 30667525 PMCID: PMC6704362 DOI: 10.1111/jcpe.13068] [Citation(s) in RCA: 115] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 12/21/2018] [Accepted: 01/09/2019] [Indexed: 12/13/2022]
Abstract
AIM To review the knowledge on the mechanisms controlling membrane-host interactions in guided bone regeneration (GBR) and investigate the possible role of GBR membranes as bioactive compartments in addition to their established role as barriers. MATERIALS AND METHODS A narrative review was utilized based on in vitro, in vivo and available clinical studies on the cellular and molecular mechanisms underlying GBR and the possible bioactive role of membranes. RESULTS Emerging data demonstrate that the membrane contributes bioactively to the regeneration of underlying defects. The cellular and molecular activities in the membrane are intimately linked to the promoted bone regeneration in the underlying defect. Along with the native bioactivity of GBR membranes, incorporating growth factors and cells in membranes or with graft materials may augment the regenerative processes in underlying defects. CONCLUSION In parallel with its barrier function, the membrane plays an active role in hosting and modulating the molecular activities of the membrane-associated cells during GBR. The biological events in the membrane are linked to the bone regenerative and remodelling processes in the underlying defect. Furthermore, the bone-promoting environments in the two compartments can likely be boosted by strategies targeting both material aspects of the membrane and host tissue responses.
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Affiliation(s)
- Omar Omar
- Department of BiomaterialsInstitute of Clinical SciencesSahlgrenska AcademyUniversity of GothenburgGothenburgSweden
| | - Ibrahim Elgali
- Department of BiomaterialsInstitute of Clinical SciencesSahlgrenska AcademyUniversity of GothenburgGothenburgSweden
| | - Christer Dahlin
- Department of BiomaterialsInstitute of Clinical SciencesSahlgrenska AcademyUniversity of GothenburgGothenburgSweden
- Department of Oral Maxillofacial Surgery/ENTNU‐Hospital OrganisationTrollhättanSweden
| | - Peter Thomsen
- Department of BiomaterialsInstitute of Clinical SciencesSahlgrenska AcademyUniversity of GothenburgGothenburgSweden
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Klein A, Baranowski A, Ritz U, Mack C, Götz H, Langendorf E, Al-Nawas B, Drees P, Rommens PM, Hofmann A. Effect of bone sialoprotein coating on progression of bone formation in a femoral defect model in rats. Eur J Trauma Emerg Surg 2019; 46:277-286. [PMID: 31139842 DOI: 10.1007/s00068-019-01159-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 05/21/2019] [Indexed: 11/26/2022]
Abstract
PURPOSE In orthopedic and trauma surgery, calcium phosphate cement (CPC) scaffolds are widely used as substitute for autologous bone grafts. The purpose of this study was to evaluate bone formation in a femoral condyle defect model in rats after scaffold-coating with bioactive bone sialoprotein (BSP). Our hypothesis was that BSP-coating results in additional bone formation. METHODS In 20 Wistar rats, defects of 3.0 mm diameter were drilled into the lateral femoral condyles of both legs. BSP-coated scaffolds or uncoated control scaffolds were implanted into the defects. After 4 and 8 weeks, five rats of each group were euthanized, respectively. µCT scans and histological analyses were performed. The ratio of bone volume-total volume (BV/TV) was analyzed and histological sections were evaluated. RESULTS At week four, bone fraction reached 5.2 ± 1.7% in BSP-coated scaffolds and 4.5 ± 3.2% in the control (p = 0.06). While bone fraction of the BSP-group did not change much between week four and eight [week eight: 5.4 ± 3.8% (p = 0.53)], there was a tendency towards an increase in the control [week eight: 7.0 ± 2.2% (p = 0.08)]. No significant difference in bone fraction were observable between BSP-coated and uncoated scaffolds at week eight (p = 0.08). CONCLUSIONS A significant superiority of BSP-coated scaffolds over uncoated scaffolds could not be proven. However, BSP-coating showed a tendency towards improving bone ingrowth in the scaffolds 4 weeks after implantation. This effect was only short-lived: bone growth in the control scaffolds tended to outpace that of the BSP-group at week eight.
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Affiliation(s)
- Anja Klein
- Department of Orthopaedics and Traumatology, Biomatics Group, University Medical Centre of the Johannes Gutenberg University, Mainz, Germany
| | - Andreas Baranowski
- Department of Orthopaedics and Traumatology, Biomatics Group, University Medical Centre of the Johannes Gutenberg University, Mainz, Germany.
| | - Ulrike Ritz
- Department of Orthopaedics and Traumatology, Biomatics Group, University Medical Centre of the Johannes Gutenberg University, Mainz, Germany
| | - Christiane Mack
- Department of Orthopaedics and Traumatology, Biomatics Group, University Medical Centre of the Johannes Gutenberg University, Mainz, Germany
| | - Hermann Götz
- Platform for Biomaterial Research, Biomatics Group, University Medical Centre of the Johannes Gutenberg University, Mainz, Germany
| | - Eva Langendorf
- Department of Orthopaedics and Traumatology, Biomatics Group, University Medical Centre of the Johannes Gutenberg University, Mainz, Germany
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery, University Medical Centre of the Johannes Gutenberg University, Mainz, Germany
| | - Philipp Drees
- Department of Orthopaedics and Traumatology, Biomatics Group, University Medical Centre of the Johannes Gutenberg University, Mainz, Germany
| | - Pol M Rommens
- Department of Orthopaedics and Traumatology, Biomatics Group, University Medical Centre of the Johannes Gutenberg University, Mainz, Germany
| | - Alexander Hofmann
- Department of Orthopaedics and Traumatology, Biomatics Group, University Medical Centre of the Johannes Gutenberg University, Mainz, Germany
- Department of Traumatology and Orthopaedics 1, Westpfalz-Medical Centre Kaiserslautern, Kaiserslautern, Germany
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Zhang H, Wang D, Zuo X, Gao C. UV-Responsive Multilayers with Multiple Functions for Biofilm Destruction and Tissue Regeneration. ACS Appl Mater Interfaces 2019; 11:17283-17293. [PMID: 31013054 DOI: 10.1021/acsami.9b04428] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The increasing demands of surgical implantation highlight the significance of anti-infection of medical devices, especially antibiofilm contamination on the surface of implants. The biofilms developed by colonized microbes will largely hinder the adhesion of host cells, leading to failure in long-term applications. In this work, UV-responsive multilayers were fabricated by stepwise assembly of poly(pyrenemethyl acrylate- co-acrylic acid) (P(PA- co-AA)) micelles and chitosan on different types of substrates. Under UV irradiation, the cleavage of pyrene ester bonds in the P(PA- co-AA) molecules resulted in the increase of roughness and hydrophilicity of the multilayers. During this process, reactive oxygen species were generated in situ within 10 s, which destroyed the biofilms of Staphylococcus aureus, leading to the degradation of the bacterial matrix. The antibacterial rate was above 99.999%. The UV-irradiated multilayers allowed the attachment and proliferation of fibroblasts, endothelial cells, and smooth muscle cells, benefiting tissue integration of the implants. When poly(dimethylsiloxane) slices with the multilayers were implanted in vivo and irradiated by UV, the density of bacteria and the inflammatory level (judging from the number of neutrophils) decreased significantly. Moreover, formation of neo blood vessels surrounding the implants was observed after implantation for 7 days. These results reveal that the photoresponsive multilayers endow the implants with multifunctions of simultaneous antibiofilm and tissue integration, shedding light for applications in surface modification of implants in particular for long-term use.
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Affiliation(s)
- Haolan Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Danyu Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Xingang Zuo
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Changyou Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
- Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine , Zhejiang University , Zheda Road , Hangzhou 310027 , China
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Li T, Ma H, Ma H, Ma Z, Qiang L, Yang Z, Yang X, Zhou X, Dai K, Wang J. Mussel-Inspired Nanostructures Potentiate the Immunomodulatory Properties and Angiogenesis of Mesenchymal Stem Cells. ACS Appl Mater Interfaces 2019; 11:17134-17146. [PMID: 31008578 DOI: 10.1021/acsami.8b22017] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The therapeutic effects of mesenchymal stem cells (MSCs)-material constructs mainly come from the secretion of trophic factors from MSCs, especially the immunomodulatory and angiogenic cytokines. Recent findings indicate the significance of topographical cues from these materials in modulating paracrine functions of MSCs. Here, we developed functionalized three-dimensional-printed bioceramic (BC) scaffolds with a mussel-inspired surface coating in order to regulate the paracrine function of adipose-derived MSCs (Ad-MSCs). We found that Ad-MSCs cultured on polydopamine-modified BC scaffolds (DOPA-BC) significantly produced more immunomodulatory and pro-angiogenic factors when compared with those cultured on BC scaffolds or microplates. Functional assays, such as endothelial progenitor cells migration, tube formation, and macrophage polarization, were performed to confirm the enhanced paracrine functions of the secreted trophic factors from Ad-MSCs cultured on DOPA-BC scaffolds. Further investigation identified that both focal adhesion kinase- and extracellular signal-related kinase signaling were the required mechano-transduction pathways through which the mussel-inspired surface stimulated the paracrine effect of Ad-MSCs. In a diabetic skin-defect-healing model in rats, conditioned medium received from the Ad-MSCs cultured on DOPA-BC sped wound closure, enhanced vascularization, and promoted macrophage switching from a proinflammatory M1 to a pro-healing and anti-inflammatory M2 phenotype in the wound bed. These results demonstrate that a bio-inspired coating with polydopamine represents an effective method to enhance the paracrine function of MSCs. Our findings illustrate a novel strategy to accelerate tissue regeneration by guiding the paracrine-signaling network.
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Affiliation(s)
- Tao Li
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital , Shanghai Jiao Tong University School of Medicine , Shanghai 200011 , P. R. China
| | - Hongshi Ma
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital , Shanghai Jiao Tong University School of Medicine , Shanghai 200011 , P. R. China
| | - Hongzhi Ma
- Department of Radiation Oncology, Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine , Central South University , Changsha 410006 , Hunan , China
| | - Zhenjiang Ma
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital , Shanghai Jiao Tong University School of Medicine , Shanghai 200011 , P. R. China
| | - Lei Qiang
- Southwest Jiaotong University College of Medicine , No. 111, North Section, 2nd Ring Road , Chengdu 610031 , Sichuan , China
| | - Zezheng Yang
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital , Shanghai Jiao Tong University School of Medicine , Shanghai 200011 , P. R. China
| | - Xiaoxiao Yang
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital , Shanghai Jiao Tong University School of Medicine , Shanghai 200011 , P. R. China
| | - Xiaojun Zhou
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital , Shanghai Jiao Tong University School of Medicine , Shanghai 200011 , P. R. China
| | - Kerong Dai
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital , Shanghai Jiao Tong University School of Medicine , Shanghai 200011 , P. R. China
| | - Jinwu Wang
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital , Shanghai Jiao Tong University School of Medicine , Shanghai 200011 , P. R. China
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Normand C, Kaye DM, Povsic TJ, Dickstein K. Beyond pharmacological treatment: an insight into therapies that target specific aspects of heart failure pathophysiology. Lancet 2019; 393:1045-1055. [PMID: 30860030 DOI: 10.1016/s0140-6736(18)32216-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 08/30/2018] [Accepted: 09/05/2018] [Indexed: 12/14/2022]
Abstract
Heart failure is a common syndrome associated with substantial morbidity and mortality. The management of symptoms and the strategies for improving prognosis have largely been based on pharmacological treatments. The pathophysiology of heart failure is complex because of the multiple causes responsible for this syndrome. This Series paper presents some examples of advances in heart failure management, in which the treatment specifically targets the underlying pathophysiological mechanisms responsible for the symptoms. These treatments include treatment of electromechanical dyssynchrony and dysrhythmia by cardiac resynchronisation and implantable cardioverter-defibrillators; neurohumoral modification by baroreflex and vagal stimulation; prevention of adverse cardiac remodelling by interatrial shunts; and finally targeting the myocardium directly by cell therapy in an attempt to regenerate new myocardial cells.
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Affiliation(s)
- Camilla Normand
- Department of Cardiology, Stavanger University Hospital, Stavanger, Norway; Institute of Internal Medicine, University of Bergen, Bergen, Norway
| | - David M Kaye
- Department of Cardiology, Alfred Hospital, Melbourne, VIC, Australia
| | - Thomas J Povsic
- Duke Clinical Research Institute, Duke Department of Medicine, Durham, NC, USA
| | - Kenneth Dickstein
- Department of Cardiology, Stavanger University Hospital, Stavanger, Norway; Institute of Internal Medicine, University of Bergen, Bergen, Norway.
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Nguyen L, Bang S, Noh I. Tissue Regeneration of Human Mesenchymal Stem Cells on Porous Gelatin Micro-Carriers by Long-Term Dynamic In Vitro Culture. Tissue Eng Regen Med 2019; 16:19-28. [PMID: 30815347 PMCID: PMC6361098 DOI: 10.1007/s13770-018-00174-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 12/10/2018] [Accepted: 12/13/2018] [Indexed: 02/07/2023] Open
Abstract
Background Tissue engineering is a multidisciplinary field which attracted much attention in recent years. One of the most important issue in tissue engineering is how to obtain high cell numbers and tissue regeneration while maintaining appropriate cellular characteristics in vitro for restoring damaged or dysfunctional body tissues and organs. These demands can be achieved by the use of three dimensional (3D) dynamic cultures of cells combined with cell-adhesive micro-carriers. Method In this study, human mesenchymal stem cells (hMSCs) were cultured in a wave-bioreactor system for up to 100 days, after seeding on Cultisphere-S porous gelatin micro-carriers. Cell counting was performed at the time points of 7, 12, 17, 31 days and compared to those of hMSCs cultured under static condition. Higher growth and proliferation rates was achieved in wave-type dynamic culture, when cell culture continued to day 31. A scanning electron microscope (SEM) photographs, both live and dead and MTT assays were taken to confirm the survival and distribution of cells on porous gelatin micro-carrier surfaces. The results of histological stains such as hematoxylin and eosin, Masson's trichrome, Alcian blue and Alizarin red S also showed improved proliferation and tissue regeneration of hMSCs on porous gelatin micro-carriers. Conclusion The experimental results demonstrated the effect and importance of both micro-carriers and bioreactor in hMSC expansion on cell proliferation and migration as well as extracellular matrix formation on the superficial and pore surfaces of the porous gelatin micro-carriers, and then their inter-connections, leading to tissue regeneration.
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Affiliation(s)
- LeTuyen Nguyen
- Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 11811 Republic of Korea
| | - Sumi Bang
- Convergence Institute of Biomedical Engineering and Biomaterials, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 11811 Republic of Korea
| | - Insup Noh
- Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 11811 Republic of Korea
- Convergence Institute of Biomedical Engineering and Biomaterials, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 11811 Republic of Korea
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Chu SJ, Saito H, Salama MA, Garber DA, Salama H, Sarnachiaro GO, Reynolds MA, Tarnow DP. Flapless Postextraction Socket Implant Placement, Part 3: The Effects of Bone Grafting and Provisional Restoration on Soft Tissue Color Change-A Retrospective Pilot Study. INT J PERIODONT REST 2019; 38:509-516. [PMID: 29889914 DOI: 10.11607/prd.3571] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
This article presents the results of a soft tissue color study on flapless immediate implant therapy from a sample of 23 patients who received either a provisional restoration alone or with bone grafting. The gingival color in clinical photographs was measured for the implant and for the contralateral tooth site at 2.0 and 5.0 mm below the free gingival margin using Photoshop software (Lightroom CC, Adobe). The average color difference (ΔE) values for the two groups were 2.6 and 2.4 at 2.0 mm and 1.9 and 2.5 at 5.0 mm from the free gingival margin, respectively. Approximately 80% of the sites were below the visibly perceptible threshold (ΔE = 3.1 ± 1.5) and not detectable by the human eye. The use of provisional restorations has shown positive outcomes on the stability of peri-implant soft tissue thickness and lower ΔE values. Further research is required to assess esthetic outcomes inclusive of color change relative to the clinical treatment rendered.
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Fabris V, Manfro R, Reginato VF, Bacchi A. Rehabilitation of a Severely Resorbed Posterior Mandible with 4-mm Extra-Short Implants and Guided Bone Regeneration: Case Report with 3-year Follow-up. Int J Oral Maxillofac Implants 2018; 33:e147-e150. [PMID: 30231103 DOI: 10.11607/jomi.6548] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Alveolar bone resorption has been a major challenge for implant placement in regions limited by anatomical structures. New alternatives have been introduced with the inclusion of extra-short implants in dentistry. The association of guided bone regeneration (GBR) with the use of extra-short implants might be a viable alternative for regions with limited bone height. This case report aimed to present the rehabilitation of a patient with severe mandibular bone resorption in the posterior region. The association of GBR with the use of extra-short implants was a viable alternative after a 3-year follow-up.
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Li J, Chen T, Huang X, Zhao Y, Wang B, Yin Y, Cui Y, Zhao Y, Zhang R, Wang X, Wang Y, Dai J. Substrate-independent immunomodulatory characteristics of mesenchymal stem cells in three-dimensional culture. PLoS One 2018; 13:e0206811. [PMID: 30408051 PMCID: PMC6224081 DOI: 10.1371/journal.pone.0206811] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 10/21/2018] [Indexed: 01/02/2023] Open
Abstract
Mesenchymal stem cells (MSCs) play important roles in tissue regeneration, and multi-lineage differentiation and immunomodulation are two major characteristics of MSCs that are utilized in stem cell therapy. MSCs in vivo have a markedly different three-dimensional (3D) niche compared to the traditional two-dimensional (2D) culture in vitro. A 3D scaffold is predicted to provide an artificial 3D environment similar to the in vivo environment. Significant changes in MSC differentiation are shown to be occurred when under 3D culture. However, the immunomodulatory characteristics of MSCs under 3D culture remain unknown. In this study, 3D culture systems were constructed using different substrates to evaluate the common immunomodulatory characteristics of MSCs. Compared to the MSCs under 2D culture, the MSCs under 3D culture, which had higher stemness and maintained cell phenotype, showed altered immunophenotypic pattern. Gene expression profile analysis at mRNA and protein level detected by gene chip and protein chip, respectively, further revealed the difference between 3D cultured MSCs and 2D cultured MSCs, which was mainly concentrated in the immunoregulation related aspects. Moreover, the immunoregulatory role of 3D culture was confirmed by our immunosuppressive experiments. These findings demonstrated that the immunomodulatory capacities of MSCs were enhanced by the 3D geometry of substrates.
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Affiliation(s)
- Jing Li
- Laboratory of Translational Medicine, Chinese PLA General Hospital, Beijing, China
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Tong Chen
- University of Chinese Academy of Sciences, Beijing, China
- The State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Xiahe Huang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Yunshan Zhao
- Institute of General Surgery, Chinese PLA General Hospital, Beijing, China
| | - Bin Wang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Yanyun Yin
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Yi Cui
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Yannan Zhao
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Ruiping Zhang
- Department of Radiology, First Clinical Medical School of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Xiujie Wang
- The State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Yingchun Wang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Jianwu Dai
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- * E-mail:
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Lee J, Lee JB, Koo KT, Seol YJ, Lee YM. Flap Management in Alveolar Ridge Preservation: A Systematic Review and Meta-Analysis. Int J Oral Maxillofac Implants 2018; 33:613-621. [PMID: 29763499 DOI: 10.11607/jomi.6368] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE This systematic review aimed to identify the effects of certain flap management procedures on ridge preservation on the basis of existing literature. MATERIALS AND METHODS Electronic (MEDLINE, EMBASE, and Cochrane Central Register of controlled trials) and manual searches of the literature were conducted until February 2017. Randomized controlled trials (RCTs), controlled clinical trials (CCTs), and prospective cohort studies that involved at least 10 subjects were eligible for this systematic review. To evaluate the beneficial effects of flap management on ridge preservation, changes in the bone width, bone height, and keratinized gingiva width were calculated using a random effects model. RESULTS Eleven studies (nine RCTs and two CCTs) were included in this review. No statistically significant differences in bone width and height changes were identified between the flapped and flapless ridge preservation techniques and between the free gingival graft and flapless ridge preservation techniques. A statistically significant shrinkage in keratinized gingiva width was noted with flapped ridge preservation compared with flapless ridge preservation (weighted mean differences, -3.21 mm; 95% confidence interval, -4.10 to -2.33; P < .00001; heterogeneity, 51%; χ2, 0.15). CONCLUSION Within the limitations, this review reveals that flapless ridge preservation was more effective in preserving bone width, bone height, and keratinized gingiva width. To present pertinent evidence regarding which flap management should be recommended for ridge preservation, more controlled and high-quality studies are warranted.
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Gallo AL, Pollini M, Paladini F. A combined approach for the development of novel sutures with antibacterial and regenerative properties: the role of silver and silk sericin functionalization. J Mater Sci Mater Med 2018; 29:133. [PMID: 30094505 DOI: 10.1007/s10856-018-6142-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 07/30/2018] [Indexed: 06/08/2023]
Abstract
Chronic wounds and related infections cause physical and psychological distress in patients, increased mortality, disability and high health care costs. The healing process can be delayed by several factors and in particular by the risk of infections, which can be further complicated by the increasing number of antibiotic-resistant microorganisms. New approaches in wounds management have been encouraged, aiming at preventing infections and improving wound healing. In this scenario, silver has emerged as an ideal antimicrobial agent due to its recognized efficacy against bacteria, viruses and fungi. Moreover, silk and in particular silk sericin from Bombyx mori has demonstrated excellent biological properties and can be considered a good candidate for skin tissue engineering. In this study absorbable PLGA sutures were functionalized with silk sericin and, then, they were treated with silver through an in situ photochemical deposition technology in order to develop an antibacterial and regenerative biomedical device. Morphological analysis was performed by Scanning Electron Microscopy and Energy Dispersive X-Ray Spectroscopy (SEM-EDX) in order to evaluate the presence and distribution of silver deposited on the sutures. The stability and durability of the sericin/silver coatings were tested and the results were related to both antibacterial properties and sample degradation. The biological analyses also aimed at studying the biocompatibility and wound healing properties of the device, evaluating the synergistic effect between sericin and silver.
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Affiliation(s)
- Anna Lucia Gallo
- Department of Engineering for Innovation, University of Salento, Via Monteroni, Lecce, 73100, Italy
- Caresilk S.r.l.s., Via Monteroni c/o Technological District DHITECH, Lecce, 73100, Italy
| | - Mauro Pollini
- Department of Engineering for Innovation, University of Salento, Via Monteroni, Lecce, 73100, Italy.
- Caresilk S.r.l.s., Via Monteroni c/o Technological District DHITECH, Lecce, 73100, Italy.
| | - Federica Paladini
- Department of Engineering for Innovation, University of Salento, Via Monteroni, Lecce, 73100, Italy
- Caresilk S.r.l.s., Via Monteroni c/o Technological District DHITECH, Lecce, 73100, Italy
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Yang X, Sun A, Ju BF, Xu S. A rotary scanning method to evaluate grooves and porosity for nerve guide conduits based on ultrasound microscopy. Rev Sci Instrum 2018; 89:073705. [PMID: 30068110 DOI: 10.1063/1.5004783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 06/21/2018] [Indexed: 06/08/2023]
Abstract
Grooved nerve guide conduits (NGCs) have been effective in the clinical treatment of peripheral nerve injury. They are generally fabricated from a micro-structured spinneret using a spinning process, which easily can cause a variety of pores and morphological deviation. The topography of internal grooves as well as the porosity can greatly influence the therapeutic effect. Traditional optical or scanning electron microscopy (SEM) methods can be used to image the grooves; however, these methods are destructive and require slicing NGCs to prepare specimens suitable for imaging. Moreover, lengthy experiments and large batches of NGCs are required to ensure reliable results from both in vitro experiments and clinical studies. In this paper, a non-destructive method for evaluating the grooves and porosity of NGCs is proposed using ultrasonic imaging combined with rotary scanning and an image analysis algorithm. Two ultrasonic methods were used: a 25-MHz point-focus ultrasonic transducer applied to observe axial cross sections of the conduits and a 100-MHz point-focus ultrasonic transducer to detect large pores caused by defects. Furthermore, a theoretical algorithm for detecting the local porosity of a conduit based on density is proposed. Herein, the proposed acoustic method and traditional optical methods are evaluated and compared. A parameter representing the specific surface area of the internal grooves is introduced and computed for both the optical and acoustic methods, and the relative errors of the computed parameter values for three different NGCs were 7.0%, 7.9%, and 15.3%. The detected location and shape of pores were consistent between the acoustic and optical methods, and greater porosity was observed in the middle of the conduit wall. In this paper, the results of the acoustic and optical methods are presented and the errors relating to the acoustic factors, device characteristics, and image processing method are further analyzed.
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Affiliation(s)
- Xiaoyu Yang
- State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Anyu Sun
- State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Bing-Feng Ju
- State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Shaoning Xu
- Zhejiang Information Institute of Machinery Industry, Hangzhou 310027, People's Republic of China
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Fénelon M, Chassande O, Kalisky J, Gindraux F, Brun S, Bareille R, Ivanovic Z, Fricain JC, Boiziau C. Human amniotic membrane for guided bone regeneration of calvarial defects in mice. J Mater Sci Mater Med 2018; 29:78. [PMID: 29858670 DOI: 10.1007/s10856-018-6086-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 04/21/2018] [Indexed: 06/08/2023]
Abstract
Due to its biological properties, human amniotic membrane (hAM) is widely studied in the field of tissue engineering and regenerative medicine. hAM is already very attractive for wound healing and it may be helpful as a support for bone regeneration. However, few studies assessed its potential for guided bone regeneration (GBR). The purpose of the present study was to assess the potential of the hAM as a membrane for GBR. In vitro, cell viability in fresh and cryopreserved hAM was assessed. In vivo, we evaluated the impact of fresh versus cryopreserved hAM, using both the epithelial or the mesenchymal layer facing the defect, on bone regeneration in a critical calvarial bone defect in mice. Then, the efficacy of cryopreserved hAM associated with a bone substitute was compared to a collagen membrane currently used for GBR. In vitro, no statistical difference was observed between the conditions concerning cell viability. Without graft material, cryopreserved hAM induced more bone formation when the mesenchymal layer covered the defect compared to the defect left empty. When associated with a bone substitute, such improved bone repair was not observed. These preliminary results suggest that cryopreserved hAM has a limited potential for GBR.
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Affiliation(s)
- Mathilde Fénelon
- Univ. Bordeaux, INSERM, Laboratory BioTis, UMR 1026, F-33076, Bordeaux, France.
- CHU Bordeaux, Odontology and Oral Health Department, F-33076, Bordeaux, France.
| | - Olivier Chassande
- Univ. Bordeaux, INSERM, Laboratory BioTis, UMR 1026, F-33076, Bordeaux, France
| | - Jérome Kalisky
- Univ. Bordeaux, INSERM, Laboratory BioTis, UMR 1026, F-33076, Bordeaux, France
| | - Florelle Gindraux
- Orthopedic, Traumatologic & Plastic Surgery Service - University Hospital of Besançon, Besançon, France
| | - Stéphanie Brun
- University hospital, Gynecology-Obstetrics Service, F-33076, Bordeaux, France
| | - Reine Bareille
- Univ. Bordeaux, INSERM, Laboratory BioTis, UMR 1026, F-33076, Bordeaux, France
| | - Zoran Ivanovic
- French Blood Establishment (EFS), Aquitaine-Limousin Branch, Bordeaux, France
| | - Jean-Christophe Fricain
- Univ. Bordeaux, INSERM, Laboratory BioTis, UMR 1026, F-33076, Bordeaux, France
- CHU Bordeaux, Odontology and Oral Health Department, F-33076, Bordeaux, France
| | - Claudine Boiziau
- Univ. Bordeaux, INSERM, Laboratory BioTis, UMR 1026, F-33076, Bordeaux, France
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Buser D, Chappuis V, Belser UC, Chen S. Implant placement post extraction in esthetic single tooth sites: when immediate, when early, when late? Periodontol 2000 2018; 73:84-102. [PMID: 28000278 DOI: 10.1111/prd.12170] [Citation(s) in RCA: 207] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Implant placement in post-extraction sites of single teeth in the esthetic zone has been a topic of great interest in the field of implant dentistry since 1990. Triggered by the development of guided bone regeneration, the concept of immediate implant placement became quite popular in the 1990s. In the past 12 years, however, the dental community has begun to focus increasingly on the esthetic outcomes of post-extraction implant placement and several studies indicated a significant risk for the development of mucosal recessions with immediate implants. Parallel with this, significant progress has been made in the understanding of tissue biology in terms of hard and soft tissue alterations post extraction, based on preclinical, clinical and radiological studies. This knowledge has helped better to understand the etiology of these esthetic complications with immediate implant placement. The present review first analyzes the various phases of the development of therapeutic strategies over the years for post-extraction implant placement in single tooth sites in the esthetic zone. It presents the current knowledge concerning the terminology with immediate, early and late implant placement, the risk factors for the development of esthetic complications, and the selection criteria for the various treatment options. In the second part, clinical recommendations are given, since a clinician active in this field of implant therapy can use all treatment options depending on the preoperative analysis including a 3D cone beam computed tomography. The selection criteria for all four treatment options are presented and documented with typical case reports to illustrate the current treatment approaches applied in daily practice.
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Lohmeyer JA, Shen ZL, Walter GF, Berger A. Bridging Extended Nerve Defects with an Artifcial Nerve Graft Containing Schwann Cells Pre-Seeded on Polyglactin Filaments. Int J Artif Organs 2018; 30:64-74. [PMID: 17295194 DOI: 10.1177/039139880703000109] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A 24 mm long bioartificial nerve graft (BNG) was created to bridge extended peripheral nerve defects of the rat sciatic nerve. In our previous studies, an identical graft had demonstrated good results over nerve gaps of up to 15 mm. The BNG device comprised a collagen-I tube filled with ten Schwann-cell-seeded polyglactin filaments and 106 isogenic Schwann cells suspended in Matrigel which were implanted in 27 rats (group I). Schwann-cell-free grafts (27 rats) and nerve autografts (18 rats) served as controls. Functional recovery was followed over a period of six months using walking track analysis. Terminal analyses of graft efficacy included neurophysiology, muscle weight, and histological assessment of the implants and the distal nerve stumps. In 17/27 cases, axonal regeneration into the distal nerve stump could be detected across the BNG, but all animals in group I and II failed to regain motor function of the hindlimb upon completion of the experiment. Axon diameter and axonal density in the graft and distal nerve stump were greater in group I than in group II. Although Schwann cells had a significant positive effect on axonal regeneration, either granuloma formation or the amount of the inserted foreign material may have impaired nerve regeneration by acting as a physical impediment to nerve regeneration or negatively effecting cell function.
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Affiliation(s)
- J A Lohmeyer
- Department of Plastic-, Hand- and Reconstructive Surgery, Burn Unit, Hannover Medical School, and Department of Plastic-, Hand- and Reconstructive Surgery, Burn Unit, University Hospital of Schleswig-Holstein, Campus Lübeck, Germany.
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