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Ravi S, Chokkakula LPP, Giri PS, Korra G, Dey SR, Rath SN. 3D Bioprintable Hypoxia-Mimicking PEG-Based Nano Bioink for Cartilage Tissue Engineering. ACS APPLIED MATERIALS & INTERFACES 2023; 15:19921-19936. [PMID: 37058130 DOI: 10.1021/acsami.3c00389] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
As hypoxia plays a significant role in the formation and maintenance of cartilage tissue, aiming to develop native hypoxia-mimicking tissue engineering scaffolds is an efficient method to treat articular cartilage (AC) defects. Cobalt (Co) is documented for its hypoxic-inducing effects in vitro by stabilizing the hypoxia-inducible factor-1α (HIF-1α), a chief regulator of stem cell fate. Considering this, we developed a novel three-dimensional (3D) bioprintable hypoxia-mimicking nano bioink wherein cobalt nanowires (Co NWs) were incorporated into the poly(ethylene glycol) diacrylate (PEGDA) hydrogel system as a hypoxia-inducing agent and encapsulated with umbilical cord-derived mesenchymal stem cells (UMSCs). In the current study, we investigated the impact of Co NWs on the chondrogenic differentiation of UMSCs in the PEGDA hydrogel system. Herein, the hypoxia-mimicking nano bioink (PEGDA+Co NW) was rheologically optimized to bioprint geometrically stable cartilaginous constructs. The bioprinted 3D constructs were evaluated for their physicochemical characterization, swelling-degradation behavior, mechanical properties, cell proliferation, and the expression of chondrogenic markers by histological, immunofluorescence, and reverse transcription-quantitative polymerase chain reaction (RT-qPCR) methods. The results disclosed that, compared to the control (PEGDA) group, the hypoxia-mimicking nano bioink (PEGDA+Co NW) group outperformed in print fidelity and mechanical properties. Furthermore, live/dead staining, double-stranded DNA (dsDNA) content, and glycosaminoglycans (GAGs) content demonstrated that adding low amounts of Co NWs (<20 ppm) into PEGDA hydrogel system supported UMSC adhesion, proliferation, and differentiation. Histological and immunofluorescence staining of the PEGDA+Co NW bioprinted structures revealed the production of type 2 collagen (COL2) and sulfated GAGs, rendering it a feasible option for cartilage repair. It was further corroborated by a significant upregulation of the hypoxia-mediated chondrogenic and downregulation of the hypertrophic/osteogenic marker expression. In conclusion, the hypoxia-mimicking hydrogel system, including PEGDA and Co2+ ions, synergistically directs the UMSCs toward the chondrocyte lineage without using expensive growth factors and provides an alternative strategy for translational applications in the cartilage tissue engineering field.
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Affiliation(s)
- Subhashini Ravi
- Regenerative Medicine and Stem cell Laboratory (RMS), Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi 502284, Telangana, India
| | - L P Pavithra Chokkakula
- Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad, Kandi 502284, Telangana, India
| | - Pravin Shankar Giri
- Regenerative Medicine and Stem cell Laboratory (RMS), Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi 502284, Telangana, India
| | - Gayathri Korra
- Department of Obstetrics and Gynecology, Sri Manjeera Super Specialty Hospital, Sangareddy 502001, Medak, Telangana, India
| | - Suhash Ranjan Dey
- Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad, Kandi 502284, Telangana, India
| | - Subha Narayan Rath
- Regenerative Medicine and Stem cell Laboratory (RMS), Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi 502284, Telangana, India
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Liu Y, Zhang S, Li C, Ma M, Yang M, Guo R, Kong X, Chai W. Fixation by Autogenous Cortical Plate Technique on Sites of Subtrochanteric Shortening Osteotomy Contributes to Early Bone Union in Total Hip Arthroplasty for Crowe Type IV Developmental Dysplasia of the Hip. Ther Clin Risk Manag 2022; 18:1059-1067. [DOI: 10.2147/tcrm.s381885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 10/06/2022] [Indexed: 11/29/2022] Open
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Liu Y, Ma M, Yang M, Guo R, Kong X, Chai W. [A comparative study of three different fixation methods after subtrochanteric shortening osteotomy in total hip arthroplasty for Crowe type Ⅳ developmental dysplasia of the hip]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2021; 35:1519-1524. [PMID: 34913306 DOI: 10.7507/1002-1892.202107121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Objective To compare the effectiveness of three different fixation methods after subtrochanteric shortening osteotomy (SSO) in total hip arthroplasty (THA) for Crowe type Ⅳ developmental dysplasia of the hip (DDH). Methods A clinical data of 63 patients (78 hips) with Crowe type Ⅳ DDH, who underwent THA with SSO between November 2014 and May 2019, was retrospectively analyzed. Among them, 18 patients (20 hips) obtained stability by intramedullary pressure provided by the S-ROM modular prostheses (group A); 22 patients (30 hips) underwent prophylactic binding by stainless steel wire after osteotomy and before stem implantation (group B); 23 patients (28 hips) were fixed with autogenous cortical strut grafts and stainless steel wire or cables (group C). There was no significant difference in gender, age, body mass index, affected limb side, and preoperative Harris score between groups ( P>0.05). The operation time, complications, imaging results, hip functional score of the three groups were recorded and compared. Results There was no significant difference in the operation time between groups ( P>0.05). All incisions healed by first intention. All patients were followed up, and the follow-up time was 2.5-4.0 years (mean, 3.1 years) in group A, 1.5-5.5 years (mean, 3.2 years) in group B, and 1.0-5.0 years (mean, 1.6 years) in group C. There was no significant difference in Harris score or Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score between groups at 4 and 12 months after operation ( P>0.05). X-ray films showed that there was no significant difference in osteotomy healing rate at 4, 8, and 12 months after operation and the osteotomy healing time between groups ( P>0.05). There was no complications such as joint dislocation, prosthesis loosening, prosthetic joint infection, or heterotopic ossification during follow-up, except for the distal femoral fracture of 1 hip during operation in group B. Conclusion In THA for patients with Crowe type Ⅳ DDH, the stainless steel wire binding alone and autogenous cortical strut grafts combined with stainless steel wire or cable binding can not significantly promote the osteotomy healing compared with femoral prosthesis intramedullary compression fixation. For patients with nonmatched medullary cavity after SSO, it is recommended to apply autogenous cortical strut grafts with wire or cables for additional fixation.
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Affiliation(s)
- Yubo Liu
- School of Medicine, Nankai University, Tianjin, 300071, P.R.China.,Senior Department of Orthopedics, the Fourth Medical Center of PLA General Hospital, Beijing, 100048, P.R.China.,National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, Beijing, 100853, P.R.China
| | - Mingyang Ma
- Senior Department of Orthopedics, the Fourth Medical Center of PLA General Hospital, Beijing, 100048, P.R.China.,National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, Beijing, 100853, P.R.China
| | - Minzhi Yang
- School of Medicine, Nankai University, Tianjin, 300071, P.R.China.,Senior Department of Orthopedics, the Fourth Medical Center of PLA General Hospital, Beijing, 100048, P.R.China.,National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, Beijing, 100853, P.R.China
| | - Renwen Guo
- Senior Department of Orthopedics, the Fourth Medical Center of PLA General Hospital, Beijing, 100048, P.R.China.,National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, Beijing, 100853, P.R.China.,Medical School of Chinese PLA, Beijing, 100853, P.R.China
| | - Xiangpeng Kong
- Senior Department of Orthopedics, the Fourth Medical Center of PLA General Hospital, Beijing, 100048, P.R.China.,National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, Beijing, 100853, P.R.China
| | - Wei Chai
- Senior Department of Orthopedics, the Fourth Medical Center of PLA General Hospital, Beijing, 100048, P.R.China.,National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, Beijing, 100853, P.R.China
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Li J, Zhao C, Liu C, Wang Z, Ling Z, Lin B, Tan B, Zhou L, Chen Y, Liu D, Zou X, Liu W. Cobalt-doped bioceramic scaffolds fabricated by 3D printing show enhanced osteogenic and angiogenic properties for bone repair. Biomed Eng Online 2021; 20:70. [PMID: 34303371 PMCID: PMC8306242 DOI: 10.1186/s12938-021-00907-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 07/15/2021] [Indexed: 11/22/2022] Open
Abstract
Background The bone regeneration of artificial bone grafts is still in need of a breakthrough to improve the processes of bone defect repair. Artificial bone grafts should be modified to enable angiogenesis and thus improve osteogenesis. We have previously revealed that crystalline Ca10Li(PO4)7 (CLP) possesses higher compressive strength and better biocompatibility than that of pure beta-tricalcium phosphate (β-TCP). In this work, we explored the possibility of cobalt (Co), known for mimicking hypoxia, doped into CLP to promote osteogenesis and angiogenesis. Methods We designed and manufactured porous scaffolds by doping CLP with various concentrations of Co (0, 0.1, 0.25, 0.5, and 1 mol%) and using 3D printing techniques. The crystal phase, surface morphology, compressive strength, in vitro degradation, and mineralization properties of Co-doped and -undoped CLP scaffolds were investigated. Next, we investigated the biocompatibility and effects of Co-doped and -undoped samples on osteogenic and angiogenic properties in vitro and on bone regeneration in rat cranium defects. Results With increasing Co-doping level, the compressive strength of Co-doped CLP scaffolds decreased in comparison with that of undoped CLP scaffolds, especially when the Co-doping concentration increased to 1 mol%. Co-doped CLP scaffolds possessed excellent degradation properties compared with those of undoped CLP scaffolds. The (0.1, 0.25, 0.5 mol%) Co-doped CLP scaffolds had mineralization properties similar to those of undoped CLP scaffolds, whereas the 1 mol% Co-doped CLP scaffolds shown no mineralization changes. Furthermore, compared with undoped scaffolds, Co-doped CLP scaffolds possessed excellent biocompatibility and prominent osteogenic and angiogenic properties in vitro, notably when the doping concentration was 0.25 mol%. After 8 weeks of implantation, 0.25 mol% Co-doped scaffolds had markedly enhanced bone regeneration at the defect site compared with that of the undoped scaffold. Conclusion In summary, CLP doped with 0.25 mol% Co2+ ions is a prospective method to enhance osteogenic and angiogenic properties, thus promoting bone regeneration in bone defect repair. Supplementary Information The online version contains supplementary material available at 10.1186/s12938-021-00907-2.
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Affiliation(s)
- Jungang Li
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Chaoqian Zhao
- Key Laboratory of Optoelectronic Materials Chemical and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China
| | - Chun Liu
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Zhenyu Wang
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Zeming Ling
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Bin Lin
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Bizhi Tan
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Linquan Zhou
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Yan Chen
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Delong Liu
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Xuenong Zou
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China.
| | - Wenge Liu
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China.
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de Laia AGS, Valverde TM, Barrioni BR, Cunha PDS, de Goes AM, de Miranda MC, Gomes DA, Queiroz-Junior CM, de Sá MA, de Magalhães Pereira M. Cobalt-containing bioactive glass mimics vascular endothelial growth factor A and hypoxia inducible factor 1 function. J Biomed Mater Res A 2021; 109:1051-1064. [PMID: 32876363 DOI: 10.1002/jbm.a.37095] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 08/26/2020] [Accepted: 08/28/2020] [Indexed: 12/12/2022]
Abstract
Bioactive glasses (BGs) have shown great potential for tissue regeneration and their composition flexibility allows the incorporation of different ions with physiological activities and therapeutic properties in the glass network. Among the many ions that could be incorporated, cobalt (Co) is a significant one, as it mimics hypoxia, triggering the formation of new blood vessels by the vascular endothelial growth factor A (VEGFA), due to the stabilizing effect on the hypoxia inducible factor 1 subunit alpha (HIF1A), an activator of angiogenesis-related genes, and is therefore of great interest for tissue engineering applications. However, despite its promising properties, the effects of glasses incorporated with Co on angiogenesis, through human umbilical cord vein endothelial cells (HUVECs) studies, need to be further investigated. Therefore, this work aimed to evaluate the biocompatibility and angiogenic potential of a new sol-gel BG, derived from the SiO2 -CaO-P2 O5 -CoO system. The structural evaluation showed the predominance of an amorphous glass structure, and the homogeneous presence of cobalt in the samples was confirmed. in vitro experiments showed that Co-containing glasses did not affect the viability of HUVECs, stimulated the formation of tubes and the gene expression of HIF1A and VEGFA. in vivo experiments showed that Co-containing glasses stimulated VEGFA and HIF1A expression in blood vessels and cell nuclei, respectively, in the deep dermis layer of the dorsal region of rats, featuring considerable local stimulation of the angiogenesis process due to Co-release. Co-containing glasses showed therapeutic effect, and Co incorporation is a promising strategy for obtaining materials with superior angiogenesis properties for tissue engineering applications.
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Affiliation(s)
- Andréia Grossi Santos de Laia
- Department of Metallurgical and Materials Engineering, Engineering School, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Thalita Marcolan Valverde
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Breno Rocha Barrioni
- Department of Metallurgical and Materials Engineering, Engineering School, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Pricila da Silva Cunha
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Alfredo Miranda de Goes
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Department of General Pathology, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Marcelo Coutinho de Miranda
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Dawidson Assis Gomes
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Celso Martins Queiroz-Junior
- Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Marcos Augusto de Sá
- Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Marivalda de Magalhães Pereira
- Department of Metallurgical and Materials Engineering, Engineering School, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Deng Z, Lin B, Jiang Z, Huang W, Li J, Zeng X, Wang H, Wang D, Zhang Y. Hypoxia-Mimicking Cobalt-Doped Borosilicate Bioactive Glass Scaffolds with Enhanced Angiogenic and Osteogenic Capacity for Bone Regeneration. Int J Biol Sci 2019; 15:1113-1124. [PMID: 31223273 PMCID: PMC6567802 DOI: 10.7150/ijbs.32358] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 02/23/2019] [Indexed: 12/21/2022] Open
Abstract
The osteogenic capacity of synthetic bone substitutes is will be highly stimulated by a well-established functional vascularized network. Cobalt (Co) ions are known that can generate a hypoxia-like response and stimulates the production of kinds of angiogenic factors. Herein, we investigated the mechanism of cobalt-doped bioactive borosilicate (36B2O3, 22CaO, 18SiO2, 8MgO, 8K2O, 6Na2O, 2P2O5; mol%) glass scaffolds for bone tissues repairing and blood vessel formation in the critical-sized cranial defect site of rats and their effects on the hBMSCs in vitro were researched. The scaffolds can control release Co2+ ions and convert into hydroxyapatite soaking in simulative body fluids (SBF). The fabircated scaffolds without cytotoxic strongly improves HIF-1α generation, VEGF protein secretion, ALP activity and upregulates the expression of osteoblast and angiogenic relative genes in hBMSCs. Eight weeks after implantation, the bioactive glass scaffolds with 3wt % CoO remarkablely enhance bone regeneration and blood vascularized network at the defective site. In conclusion, as a graft material for bone defects, low-oxygen simulated cobalt-doped bioactive glass scaffold is promising.
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Affiliation(s)
- Zhengwei Deng
- Department of Orthopedics, South Campus of Shanghai Sixth People's Hospital Affiliated of Shanghai University of Medicine&Health Sciences, 279 zhouzhu road, Shanghai 220120, People's Republic of China
- Graduate School, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, People's Republic of China
| | - Bocai Lin
- Laboratory for Advance Lubricating Materials, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, People's Republic of China
| | - Zenghui Jiang
- Department of Orthopedic Surgery, Zhejiang Hospital, Hangzhou 310013, People's Republic of China
| | - Wenhai Huang
- School of Materials Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
| | - Jiusheng Li
- Laboratory for Advance Lubricating Materials, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, People's Republic of China
| | - Xiangqiong Zeng
- Laboratory for Advance Lubricating Materials, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, People's Republic of China
| | - Hui Wang
- Laboratory for Advance Lubricating Materials, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, People's Republic of China
| | - Deping Wang
- School of Materials Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
| | - Yadong Zhang
- Department of Orthopedics, South Campus of Shanghai Sixth People's Hospital Affiliated of Shanghai University of Medicine&Health Sciences, 279 zhouzhu road, Shanghai 220120, People's Republic of China
- Shanghai Fengxian District Central Hospital Affiliated of Southern Medical University, Shanghai 201400, People's Republic of China
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Abdel Karim M, Andrawis J, Bengoa F, Bracho C, Compagnoni R, Cross M, Danoff J, Della Valle CJ, Foguet P, Fraguas T, Gehrke T, Goswami K, Guerra E, Ha YC, Klaber I, Komnos G, Lachiewicz P, Lausmann C, Levine B, Leyton-Mange A, McArthur BA, Mihalič R, Neyt J, Nuñez J, Nunziato C, Parvizi J, Perka C, Reisener MJ, Rocha CH, Schweitzer D, Shivji F, Shohat N, Sierra RJ, Suleiman L, Tan TL, Vasquez J, Ward D, Wolf M, Zahar A. Hip and Knee Section, Diagnosis, Algorithm: Proceedings of International Consensus on Orthopedic Infections. J Arthroplasty 2019; 34:S339-S350. [PMID: 30348566 DOI: 10.1016/j.arth.2018.09.018] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Affiliation(s)
- Siddharth Jhunjhunwala
- Centre for BioSystems Science and Engineering, Indian Institute of Science, Bengaluru, India 560012
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Gibon E, Amanatullah DF, Loi F, Pajarinen J, Nabeshima A, Yao Z, Hamadouche M, Goodman SB. The biological response to orthopaedic implants for joint replacement: Part I: Metals. J Biomed Mater Res B Appl Biomater 2016; 105:2162-2173. [PMID: 27328111 DOI: 10.1002/jbm.b.33734] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 04/19/2016] [Accepted: 06/01/2016] [Indexed: 12/12/2022]
Abstract
Joint replacement is a commonly performed, highly successful orthopaedic procedure, for which surgeons have a large choice of different materials and implant designs. The materials used for joint replacement must be both biologically acceptable to minimize adverse local tissue reactions, and robust enough to support weight bearing during common activities of daily living. Modern joint replacements are made from metals and their alloys, polymers, ceramics, and composites. This review focuses on the biological response to the different biomaterials used for joint replacement. In general, modern materials for joint replacement are well tolerated by the body as long as they are in bulk (rather than in particulate or ionic) form, are mechanically stable and noninfected. If the latter conditions are not met, the prosthesis will be associated with an acute/chronic inflammatory reaction, peri-prosthetic osteolysis, loosening and failure. This article (Part 1 of 2) is dedicated to the use of metallic devices in orthopaedic surgery including the associated biological response to metallic byproducts is a review of the basic science literature regarding this topic. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 2162-2173, 2017.
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Affiliation(s)
- Emmanuel Gibon
- Department of Orthopaedic Surgery, Stanford University, Stanford, California.,Laboratoire de Biomécanique et Biomatériaux Ostéo-Articulaires - UMR CNRS 7052, Faculté de Médecine - Université Paris7, Paris, France.,Department of Orthopaedic Surgery, Hopital Cochin, APHP, Université Paris5, Paris, France
| | - Derek F Amanatullah
- Department of Orthopaedic Surgery, Stanford University, Stanford, California
| | - Florence Loi
- Department of Orthopaedic Surgery, Stanford University, Stanford, California
| | - Jukka Pajarinen
- Department of Orthopaedic Surgery, Stanford University, Stanford, California
| | - Akira Nabeshima
- Department of Orthopaedic Surgery, Stanford University, Stanford, California
| | - Zhenyu Yao
- Department of Orthopaedic Surgery, Stanford University, Stanford, California
| | - Moussa Hamadouche
- Department of Orthopaedic Surgery, Hopital Cochin, APHP, Université Paris5, Paris, France
| | - Stuart B Goodman
- Department of Orthopaedic Surgery, Stanford University, Stanford, California
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RamaKrishnan AM, Sankaranarayanan K. Understanding autoimmunity: The ion channel perspective. Autoimmun Rev 2016; 15:585-620. [PMID: 26854401 DOI: 10.1016/j.autrev.2016.02.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Accepted: 01/29/2016] [Indexed: 12/11/2022]
Abstract
Ion channels are integral membrane proteins that orchestrate the passage of ions across the cell membrane and thus regulate various key physiological processes of the living system. The stringently regulated expression and function of these channels hold a pivotal role in the development and execution of various cellular functions. Malfunction of these channels results in debilitating diseases collectively termed channelopathies. In this review, we highlight the role of these proteins in the immune system with special emphasis on the development of autoimmunity. The role of ion channels in various autoimmune diseases is also listed out. This comprehensive review summarizes the ion channels that could be used as molecular targets in the development of new therapeutics against autoimmune disorders.
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Affiliation(s)
| | - Kavitha Sankaranarayanan
- AU-KBC Research Centre, Madras Institute of Technology, Anna University, Chrompet, Chennai 600 044, India.
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Akrawi H, Hossain FS, Niculescu S, Hashim Z, Ng AB, Shetty A. Midterm results of 36 mm metal-on-metal total hip arthroplasty. Indian J Orthop 2016; 50:256-62. [PMID: 27293285 PMCID: PMC4885293 DOI: 10.4103/0019-5413.181786] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Despite the many perceived benefits of metal-on-metal (MoM) articulation in total hip arthroplasty (THA), there have been growing concerns about metallosis and adverse reaction to metal debris (ARMD). Analysis of size 36 mm MoM articulation THAs is presented. These patients were evaluated for patient characteristics, relationship between blood metal ions levels and the inclination as well as the version of acetabular component, cumulative survival probability at final followup and functional outcome at final followup. MATERIALS AND METHODS 288, size 36 mm MoM THAs implanted in 269 patients at our institution from 2004 to 2010 were included in this retrospective study. These patients were assessed clinically for hip symptoms, perioperative complications and causes of revision arthroplasty were analysed. Biochemically, blood cobalt and chromium metal ions level were recorded and measurements of acetabular inclination and version were examined. Radiological evaluation utilizing Metal Artefact Reduction Sequence (MARS) MRI was undertaken and implant cumulative survivorship was evaluated. RESULTS The mean followup was 5 years (range 2-7 years), mean age was 73 years and the mean Oxford hip score was 36.9 (range 5-48). Revision arthroplasty was executed in 20 (7.4%) patients, of which 15 patients underwent single-stage revision THA. The causes of revision arthroplasty were: ARMD changes in 6 (2.2%) patients, infection in 5 (1.9%) patients and aseptic loosening in 5 (1.9%) patients. Three (1.1%) patients had their hips revised for instability, 1 (0.3%) for raised blood metal ions levels. The implant cumulative survival rate, with revision for any reason, was 68.9% at 7 years. CONCLUSIONS Although medium-sized MoM THA with a 36 mm head has a marginally better survivorship at midterm followup, compared to larger size head MoM articulating THA, our findings nonetheless are still worryingly poor in comparison to what has been quoted in the literature. Furthermore, ARMD-related revision remains the predominant cause of failure in this cohort with medium-sized MoM articulation. No correlation was found between blood metal ions levels and the inclination as well as the version of acetabular component.
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Affiliation(s)
- Hawar Akrawi
- Department of Trauma and Orthopaedics, Mid Yorkshire Hospitals NHS Trust, Wakefield, WF1 4DG, UK,Address for correspondence: Mr. Hawar Akrawi, Mid Yorkshire Hospitals NHS Trust, Wakefield, WF1 4DG, UK. E-mail:
| | - Fahad S Hossain
- Department of Trauma and Orthopaedics, Mid Yorkshire Hospitals NHS Trust, Wakefield, WF1 4DG, UK
| | - Stefan Niculescu
- Department of Trauma and Orthopaedics, Mid Yorkshire Hospitals NHS Trust, Wakefield, WF1 4DG, UK
| | - Zaid Hashim
- Department of Trauma and Orthopaedics, Mid Yorkshire Hospitals NHS Trust, Wakefield, WF1 4DG, UK
| | - Arron Biing Ng
- Department of Trauma and Orthopaedics, Mid Yorkshire Hospitals NHS Trust, Wakefield, WF1 4DG, UK
| | - Ajit Shetty
- Department of Trauma and Orthopaedics, Mid Yorkshire Hospitals NHS Trust, Wakefield, WF1 4DG, UK
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Abstract
Hv1 is a voltage-gated proton-selective channel that plays critical parts in host defense, sperm motility, and cancer progression. Hv1 contains a conserved voltage-sensor domain (VSD) that is shared by a large family of voltage-gated ion channels, but it lacks a pore domain. Voltage sensitivity and proton conductivity are conferred by a unitary VSD that consists of four transmembrane helices. The architecture of Hv1 differs from that of cation channels that form a pore in the center among multiple subunits (as in most cation channels) or homologous repeats (as in voltage-gated sodium and calcium channels). Hv1 forms a dimer in which a cytoplasmic coiled coil underpins the two protomers and forms a single, long helix that is contiguous with S4, the transmembrane voltage-sensing segment. The closed-state structure of Hv1 was recently solved using X-ray crystallography. In this article, we discuss the gating mechanism of Hv1 and focus on cooperativity within dimers and their sensitivity to metal ions.
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Affiliation(s)
- Yasushi Okamura
- Department of Integrative Physiology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan; , ,
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Seredenina T, Demaurex N, Krause KH. Voltage-Gated Proton Channels as Novel Drug Targets: From NADPH Oxidase Regulation to Sperm Biology. Antioxid Redox Signal 2015; 23:490-513. [PMID: 24483328 PMCID: PMC4543398 DOI: 10.1089/ars.2013.5806] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
SIGNIFICANCE Voltage-gated proton channels are increasingly implicated in cellular proton homeostasis. Proton currents were originally identified in snail neurons less than 40 years ago, and subsequently shown to play an important auxiliary role in the functioning of reactive oxygen species (ROS)-generating nicotinamide adenine dinucleotide phosphate (NADPH) oxidases. Molecular identification of voltage-gated proton channels was achieved less than 10 years ago. Interestingly, so far, only one gene coding for voltage-gated proton channels has been identified, namely hydrogen voltage-gated channel 1 (HVCN1), which codes for the HV1 proton channel protein. Over the last years, the first picture of putative physiological functions of HV1 has been emerging. RECENT ADVANCES The best-studied role remains charge and pH compensation during the respiratory burst of the phagocyte NADPH oxidase (NOX). Strong evidence for a role of HV1 is also emerging in sperm biology, but the relationship with the sperm NOX5 remains unclear. Probably in many instances, HV1 functions independently of NOX: for example in snail neurons, basophils, osteoclasts, and cancer cells. CRITICAL ISSUES Generally, ion channels are good drug targets; however, this feature has so far not been exploited for HV1, and hitherto no inhibitors compatible with clinical use exist. However, there are emerging indications for HV1 inhibitors, ranging from diseases with a strong activation of the phagocyte NOX (e.g., stroke) to infertility, osteoporosis, and cancer. FUTURE DIRECTIONS Clinically useful HV1-active drugs should be developed and might become interesting drugs of the future.
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Affiliation(s)
- Tamara Seredenina
- 1 Department of Pathology and Immunology, Geneva University Medical Faculty , Centre Médical Universitaire, Geneva, Switzerland
| | - Nicolas Demaurex
- 2 Department of Cellular Physiology and Metabolism, Geneva University Medical Faculty , Centre Médical Universitaire, Geneva, Switzerland
| | - Karl-Heinz Krause
- 1 Department of Pathology and Immunology, Geneva University Medical Faculty , Centre Médical Universitaire, Geneva, Switzerland .,3 Department of Genetic and Laboratory Medicine, Geneva University Hospitals , Centre Médical Universitaire, Geneva, Switzerland
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Lübbeke A, Gonzalez A, Garavaglia G, Roussos C, Bonvin A, Stern R, Peter R, Hoffmeyer P. A comparative assessment of small-head metal-on-metal and ceramic-on-polyethylene total hip replacement. Bone Joint J 2014; 96-B:868-75. [PMID: 24986938 DOI: 10.1302/0301-620x.96b7.32369] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Large-head metal-on-metal (MoM) total hip replacements (THR) have given rise to concern. Comparative studies of small-head MoM THRs over a longer follow-up period are lacking. Our objective was to compare the incidence of complications such as infection, dislocation, revision, adverse local tissue reactions, mortality and radiological and clinical outcomes in small-head (28 mm) MoM and ceramic-on-polyethylene (CoP) THRs up to 12 years post-operatively. A prospective cohort study included 3341 THRs in 2714 patients. The mean age was 69.1 years (range 24 to 98) and 1848 (55.3%) were performed in women, with a mean follow-up of 115 months (18 to 201). There were 883 MoM and 2458 CoP bearings. Crude incidence rates (cases/1000 person-years) were: infection 1.3 vs 0.8; dislocation 3.3 vs 3.1 and all-cause revision 4.3 vs 2.2, respectively. There was a significantly higher revision rate after ten years (adjusted hazard ratio 9.4; 95% CI 2.6 to 33.6) in the MoM group, and ten of 26 patients presented with an adverse local tissue reaction at revision. No differences in mortality, osteolysis or clinical outcome were seen. In conclusion, we found similar results for small-head MoM and CoP bearings up to ten years post-operatively, but after ten years MoM THRs had a higher risk of all-cause revision. Furthermore, the presence of an adverse response to metal debris seen in the small-head MOM group at revision is a cause for concern.
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Affiliation(s)
- A Lübbeke
- Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, Geneva, CH-1211, Switzerland
| | - A Gonzalez
- Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, Geneva, CH-1211, Switzerland
| | - G Garavaglia
- Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, Geneva, CH-1211, Switzerland
| | - C Roussos
- Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, Geneva, CH-1211, Switzerland
| | - A Bonvin
- Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, Geneva, CH-1211, Switzerland
| | - R Stern
- Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, Geneva, CH-1211, Switzerland
| | - R Peter
- Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, Geneva, CH-1211, Switzerland
| | - P Hoffmeyer
- Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, Geneva, CH-1211, Switzerland
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16
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Kolmas J, Groszyk E, Kwiatkowska-Różycka D. Substituted hydroxyapatites with antibacterial properties. BIOMED RESEARCH INTERNATIONAL 2014; 2014:178123. [PMID: 24949423 PMCID: PMC4037608 DOI: 10.1155/2014/178123] [Citation(s) in RCA: 144] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 04/14/2014] [Indexed: 02/06/2023]
Abstract
Reconstructive surgery is presently struggling with the problem of infections located within implantation biomaterials. Of course, the best antibacterial protection is antibiotic therapy. However, oral antibiotic therapy is sometimes ineffective, while administering an antibiotic at the location of infection is often associated with an unfavourable ratio of dosage efficiency and toxic effect. Thus, the present study aims to find a new factor which may improve antibacterial activity while also presenting low toxicity to the human cells. Such factors are usually implemented along with the implant itself and may be an integral part of it. Many recent studies have focused on inorganic factors, such as metal nanoparticles, salts, and metal oxides. The advantages of inorganic factors include the ease with which they can be combined with ceramic and polymeric biomaterials. The following review focuses on hydroxyapatites substituted with ions with antibacterial properties. It considers materials that have already been applied in regenerative medicine (e.g., hydroxyapatites with silver ions) and those that are only at the preliminary stage of research and which could potentially be used in implantology or dentistry. We present methods for the synthesis of modified apatites and the antibacterial mechanisms of various ions as well as their antibacterial efficiency.
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Affiliation(s)
- Joanna Kolmas
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy, Medical University of Warsaw, Ul. Banacha 1, 02-097 Warsaw, Poland
| | - Ewa Groszyk
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy, Medical University of Warsaw, Ul. Banacha 1, 02-097 Warsaw, Poland
| | - Dagmara Kwiatkowska-Różycka
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy, Medical University of Warsaw, Ul. Banacha 1, 02-097 Warsaw, Poland
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DeCoursey TE. Voltage-gated proton channels: molecular biology, physiology, and pathophysiology of the H(V) family. Physiol Rev 2013; 93:599-652. [PMID: 23589829 PMCID: PMC3677779 DOI: 10.1152/physrev.00011.2012] [Citation(s) in RCA: 178] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Voltage-gated proton channels (H(V)) are unique, in part because the ion they conduct is unique. H(V) channels are perfectly selective for protons and have a very small unitary conductance, both arguably manifestations of the extremely low H(+) concentration in physiological solutions. They open with membrane depolarization, but their voltage dependence is strongly regulated by the pH gradient across the membrane (ΔpH), with the result that in most species they normally conduct only outward current. The H(V) channel protein is strikingly similar to the voltage-sensing domain (VSD, the first four membrane-spanning segments) of voltage-gated K(+) and Na(+) channels. In higher species, H(V) channels exist as dimers in which each protomer has its own conduction pathway, yet gating is cooperative. H(V) channels are phylogenetically diverse, distributed from humans to unicellular marine life, and perhaps even plants. Correspondingly, H(V) functions vary widely as well, from promoting calcification in coccolithophores and triggering bioluminescent flashes in dinoflagellates to facilitating killing bacteria, airway pH regulation, basophil histamine release, sperm maturation, and B lymphocyte responses in humans. Recent evidence that hH(V)1 may exacerbate breast cancer metastasis and cerebral damage from ischemic stroke highlights the rapidly expanding recognition of the clinical importance of hH(V)1.
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Affiliation(s)
- Thomas E DeCoursey
- Dept. of Molecular Biophysics and Physiology, Rush University Medical Center HOS-036, 1750 West Harrison, Chicago, IL 60612, USA.
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Berton C, Puskas GJ, Christofilopoulos P, Stern R, Hoffmeyer P, Lübbeke A. Comparison of the outcome following the fixation of osteotomies or fractures associated with total hip replacement using cables or wires: the results at five years. ACTA ACUST UNITED AC 2013; 94:1475-81. [PMID: 23109625 DOI: 10.1302/0301-620x.94b11.29687] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
There are no recent studies comparing cable with wire for the fixation of osteotomies or fractures in total hip replacement (THR). Our objective was to evaluate the five-year clinical and radiological outcomes and complication rates of the two techniques. We undertook a review including all primary and revision THRs performed in one hospital between 1996 and 2005 using cable or wire fixation. Clinical and radiological evaluation was performed five years post-operatively. Cables were used in 51 THRs and wires in 126, and of these, 36 THRs with cable (71%) and 101 with wire (80%) were evaluated at follow-up. The five-year radiographs available for 33 cable and 91 wire THRs revealed rates of breakage of fixation of 12 of 33 (36%) and 42 of 91 (46%), respectively. With cable there was a significantly higher risk of metal debris (68% vs. 9%; adjusted relative risk (RR) 6.6; 95% confidence interval (CI) 3.0 to 14.1), nonunion (36% vs. 21%; adjusted RR 2.0; 95% CI 1.0 to 3.9) and osteolysis around the material, acetabulum or femur (61% vs 19%; adjusted RR 3.9; 95% CI 2.3 to 6.5). Cable breakage increased the risk of osteolysis to 83%. There was a trend towards foreign-body reaction and increased infection with cables. Clinical results did not differ between the groups. In conclusion, we found a higher incidence of complications and a trend towards increased infection and foreign-body reaction with the use of cables.
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Affiliation(s)
- C Berton
- Geneva University Hospitals, Division of Orthopaedics and Trauma Surgery, 4 Rue Gabrielle-Perret-Gentil, CH-1211 Geneva, Switzerland
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Hosman AH, Bulstra SK, Sjollema J, van der Mei HC, Busscher HJ, Neut D. The influence of Co-Cr and UHMWPE particles on infection persistence: an in vivo study in mice. J Orthop Res 2012; 30:341-7. [PMID: 21866572 DOI: 10.1002/jor.21526] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Accepted: 07/29/2011] [Indexed: 02/04/2023]
Abstract
Wear of metal-on-metal (cobalt-chromium, Co-Cr particles) and metal-on-polyethylene (ultra-high-molecular-weight polyethylene, UHMWPE particles) bearing surfaces in hip prostheses is a major problem in orthopedics. This study aimed to compare the influence of Co-Cr and UHMWPE particles on the persistence of infection. Bioluminescent Staphylococcus aureus Xen36 were injected in air pouches prepared in subcutaneous tissue of immuno-competent BALB/c mice (control), as a model for the joint space, in the absence or presence of Co-Cr or UHMWPE particles. Bioluminescence was monitored longitudinally up to 21 days, corrected for absorption and reflection by the particles and expressed relative to the bioluminescence found in the presence of staphylococci only. After termination, air pouch fluid and air pouch membrane were cultured and histologically analyzed. Bioluminescence was initially lower in mice exposed to UHMWPE particles with staphylococci than in mice injected with staphylococci only, possibly because UHMWPE particles initially stimulated a higher macrophage presence in murine air pouch membranes. For mice exposed to Co-Cr particles with staphylococci, bioluminescence was observed to be higher in two out of six animals compared to the presence of staphylococci alone. In the majority of mice, infection risk in the absence or presence of Co-Cr and UHMWPE particles appeared similar, assuming that the longevity of an elevated bioluminescence is indicative of a higher infection risk. However, the presence of Co-Cr particles yielded a higher bioluminescence in two out of six mice, possibly because the macrophage degradative function was hampered by the presence of Co-Cr particles.
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Affiliation(s)
- Anton H Hosman
- Department of Biomedical Engineering, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
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Wu C, Zhou Y, Fan W, Han P, Chang J, Yuen J, Zhang M, Xiao Y. Hypoxia-mimicking mesoporous bioactive glass scaffolds with controllable cobalt ion release for bone tissue engineering. Biomaterials 2011; 33:2076-85. [PMID: 22177618 DOI: 10.1016/j.biomaterials.2011.11.042] [Citation(s) in RCA: 262] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Accepted: 11/20/2011] [Indexed: 11/24/2022]
Abstract
Low oxygen pressure (hypoxia) plays an important role in stimulating angiogenesis; there are, however, few studies to prepare hypoxia-mimicking tissue engineering scaffolds. Mesoporous bioactive glass (MBG) has been developed as scaffolds with excellent osteogenic properties for bone regeneration. Ionic cobalt (Co) is established as a chemical inducer of hypoxia-inducible factor (HIF)-1α, which induces hypoxia-like response. The aim of this study was to develop hypoxia-mimicking MBG scaffolds by incorporating ionic Co(2+) into MBG scaffolds and investigate if the addition of Co(2+) ions would induce a cellular hypoxic response in such a tissue engineering scaffold system. The composition, microstructure and mesopore properties (specific surface area, nano-pore volume and nano-pore distribution) of Co-containing MBG (Co-MBG) scaffolds were characterized and the cellular effects of Co on the proliferation, differentiation, vascular endothelial growth factor (VEGF) secretion, HIF-1α expression and bone-related gene expression of human bone marrow stromal cells (BMSCs) in MBG scaffolds were systematically investigated. The results showed that low amounts of Co (<5%) incorporated into MBG scaffolds had no significant cytotoxicity and that their incorporation significantly enhanced VEGF protein secretion, HIF-1α expression, and bone-related gene expression in BMSCs, and also that the Co-MBG scaffolds support BMSC attachment and proliferation. The scaffolds maintain a well-ordered mesopore channel structure and high specific surface area and have the capacity to efficiently deliver antibiotics drugs; in fact, the sustained released of ampicillin by Co-MBG scaffolds gives them excellent anti-bacterial properties. Our results indicate that incorporating cobalt ions into MBG scaffolds is a viable option for preparing hypoxia-mimicking tissue engineering scaffolds and significantly enhanced hypoxia function. The hypoxia-mimicking MBG scaffolds have great potential for bone tissue engineering applications by combining enhanced angiogenesis with already existing osteogenic properties.
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Affiliation(s)
- Chengtie Wu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China.
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22
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Mao X, Wong AA, Crawford RW. Cobalt toxicity — an emerging clinical problem in patients with metal‐on‐metal hip prostheses? Med J Aust 2011; 194:649-51. [DOI: 10.5694/j.1326-5377.2011.tb03151.x] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2011] [Accepted: 05/19/2011] [Indexed: 11/17/2022]
Affiliation(s)
- Xinzhan Mao
- Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | | | - Ross W Crawford
- Prince Charles Hospital, Brisbane, QLD
- School of Engineering Systems and Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD
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