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Lee J, Cha J, Kim S, Jung U, Thoma DS, Jung RE. Lateral onlay grafting using different combinations of soft‐type synthetic block grafts and resorbable collagen membranes: An experimental in vivo study. Clin Oral Implants Res 2020; 31:303-314. [DOI: 10.1111/clr.13566] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 12/17/2019] [Accepted: 12/18/2019] [Indexed: 11/29/2022]
Affiliation(s)
- Jung‐Tae Lee
- Department of Periodontology Dental Research Institute Seoul National University School of Dentistry Seoul South Korea
| | - Jae‐Kook Cha
- Department of Periodontology Research Institute for Periodontal Regeneration College of Dentistry Yonsei University Seoul South Korea
| | - Sungtae Kim
- Department of Periodontology Dental Research Institute Seoul National University School of Dentistry Seoul South Korea
| | - Ui‐Won Jung
- Department of Periodontology Research Institute for Periodontal Regeneration College of Dentistry Yonsei University Seoul South Korea
| | - Daniel S. Thoma
- Clinic of Reconstructive Dentistry Center of Dental Medicine University of Zurich Zurich Switzerland
| | - Ronald E. Jung
- Clinic of Reconstructive Dentistry Center of Dental Medicine University of Zurich Zurich Switzerland
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Shao A, Ling Y, Xu L, Liu S, Fan C, Wang Z, Xu B, Wang C. Xenogeneic bone matrix immune risk assessment using GGTA1 knockout mice. Artif Cells Nanomed Biotechnol 2018; 46:S359-S369. [PMID: 30207744 DOI: 10.1080/21691401.2018.1493489] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Homeotransplantation of bones for replacement therapy have been demonstrated reliably in clinical data. However, human donor bones applicable for homeotransplantation are in short supply, which facilitates the search for suitable alternatives, such as xenografts grafts. The α-Gal antigen-related immune risk of xenografts directly affects the safety and effectiveness of the biomaterials and limits their applications in the clinic. The immune risk can be prevented by depletion or breaking anti-Gal antibody prior to transplant. Therefore, how to assess the immune risk of the bone substitutes and select the reliable animal research model become extremely important. In this study, we prepared lyophilized bone substitutes (T1) and Guanghao Biotech bone substitutes (T2, animal-derived biomaterials with α-Gal antigen decreased), aimed to assess the immune risk of xenografts bone substitutes on GGTA1 knockout mice. The α-Gal antigen contents of T1 and T2 were firstly detected by ELISA method in vitro. The bone substitutes were then implanted subcutaneously into GGTA1 knockout mice for 2, 4 and 12 weeks, respectively. The total serum antibody levels, anti-α-Gal antibody levels, inflammatory cytokine and splenic lymphocyte surface molecules were detected and histology analysis of skin and thymus were performed to systematically evaluate the immune response caused by the T1 and T2 bone substitutes in mice. In vitro results showed that the amount of α-Gal epitopes in T1 bone substitutes was significantly higher than T2 bone substitutes, and the clearance rate of α-Gal antigen in T2 bone substitutes achieved about 55.6%. Results of antibody level in vivo showed that the T1 bone substitutes group possessed significantly higher total IgG, IgM, IgA and anti-α-Gal IgG levels than T2 and control group, while T2 group showed no significant changes of these indexes compared with control. In terms of inflammatory cytokines, T1 bone substitutes showed evidently higher levels of IL-4, IL-12P70 and IL-10 than T2 and control, while T2 group was comparable to control. No changes in the levels of splenic lymphocyte surface molecules were found in the three groups (T1, T2 and control group) during the experimental periods. The pathological results demonstrated that the inflammatory response in T2 group was lighter than the T1 group, which was in accordance with the inflammatory cytokines levels. The above results indicated that the process of antigen removal effectively reduced the α-Gal antigens content in T2 bone substitutes, which caused little immune response in vivo and could be used as bone healing materials. This study also demonstrated that GGTA1 knockout mice can be used as a routine tool to assess the immune risk of animal-derived biomaterials.
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Affiliation(s)
- Anliang Shao
- a Department of Clinical Laboratory , Medical Laboratory Center, Chinese PLA General Hospital & Medical School of Chinese PLA , Beijing , China.,b Institute for Medical Device Control , National Institutes for Food and Drug Control , Beijing , China
| | - You Ling
- c National Engineering Laboratory for Regenerative Medical Implant Devices, Guanhao Biotech, Co., LTD , Guangzhou , China
| | - Liming Xu
- b Institute for Medical Device Control , National Institutes for Food and Drug Control , Beijing , China
| | - Susu Liu
- d Institute for Laboratory Animal Resources , National Institutes for Food and Drug Control , Beijing , China
| | - Changfa Fan
- d Institute for Laboratory Animal Resources , National Institutes for Food and Drug Control , Beijing , China
| | - Zhijie Wang
- c National Engineering Laboratory for Regenerative Medical Implant Devices, Guanhao Biotech, Co., LTD , Guangzhou , China
| | - Bin Xu
- c National Engineering Laboratory for Regenerative Medical Implant Devices, Guanhao Biotech, Co., LTD , Guangzhou , China
| | - Chengbin Wang
- a Department of Clinical Laboratory , Medical Laboratory Center, Chinese PLA General Hospital & Medical School of Chinese PLA , Beijing , China
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Li W, Ye Z, Wang W, Wang K, Li L, Zhao D. Clinical effect of hyperbaric oxygen therapy in the treatment of femoral head necrosis. Orthopäde 2016; 46:440-446. [DOI: 10.1007/s00132-016-3360-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Zhang D, Liu C, Zhang J, Cai D, Yang X, Li S, Zhong H. [RGD peptide-modified chitosan as a gene carrier of implant surface]. Hua Xi Kou Qiang Yi Xue Za Zhi 2014; 32:336-340. [PMID: 25241532 PMCID: PMC7041066 DOI: 10.7518/hxkq.2014.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Revised: 05/20/2014] [Indexed: 06/03/2023]
Abstract
OBJECTIVE This study is conducted to explore new methods to perform surface biomodification of titanium implants and improve osteogenic efficiency. METHODS An RGD peptide and chitosan (CS) were combined by acylation reaction, forming RGD-CS. An RGD-CS/pDNA complex was subsequently prepared using a complex coacervation method and grafted on a pure titanium surface after physical and biochemical treatments were performed. The chemical structural characteristics of RGD-CS were evaluated using an infrared spectrometer and an elemental analyzer. The shape of this complex was then assessed by gel electrophoresis combined with atomic force microscopy. The grafting effect of this complex on the titanium surface was detected by EB staining. RESULTS CS and RGD peptides were coupled by an amide bond. The RGD-CS/pDNA complex was completely composited at N/P > or = 2. Atomic force microscopy results showed that the morphology of this complex was mainly spherical. EB staining experiments showed that this complex was successfully grafted on the titanium plate. CONCLUSION RGD peptide-modified CS can be used as a titanium implant surface plasmid package carrier of pDNA.
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Lovati AB, Lopa S, Talò G, Previdi S, Recordati C, Mercuri D, Segatti F, Zagra L, Moretti M. In vivoevaluation of bone deposition in macroporous titanium implants loaded with mesenchymal stem cells and strontium-enriched hydrogel. J Biomed Mater Res B Appl Biomater 2014; 103:448-56. [DOI: 10.1002/jbm.b.33228] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 04/10/2014] [Accepted: 05/22/2014] [Indexed: 02/02/2023]
Affiliation(s)
- Arianna B. Lovati
- Cell and Tissue Engineering Laboratory; IRCCS Galeazzi Orthopaedic Institute; Milan Italy
| | - Silvia Lopa
- Cell and Tissue Engineering Laboratory; IRCCS Galeazzi Orthopaedic Institute; Milan Italy
| | - Giuseppe Talò
- Cell and Tissue Engineering Laboratory; Gruppo Ospedaliero San Donato Foundation; Milan Italy
| | - Sara Previdi
- Oncology Department; Laboratory of Molecular Pharmacology, Istituto di Ricerche Farmacologiche Mario Negri; Milan Italy
| | - Camilla Recordati
- Mouse & Animal Pathology Laboratory (MAP Lab); Filarete Foundation; Milan Italy
| | | | | | - Luigi Zagra
- Hip Department; IRCCS Galeazzi Orthopaedic Institute; Milan Italy
| | - Matteo Moretti
- Cell and Tissue Engineering Laboratory; IRCCS Galeazzi Orthopaedic Institute; Milan Italy
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Fu Y, Zhang Q, Sun Y, Liao W, Bai X, Zhang L, Du L, Jin Y, Wang Q, Li Z, Wang Y. Controlled-release of bone morphogenetic protein-2 from a microsphere coating applied to acid-etched Ti6AL4V implants increases biological bone growth in vivo. J Orthop Res 2014; 32:744-51. [PMID: 24536004 DOI: 10.1002/jor.22594] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 01/17/2014] [Indexed: 02/04/2023]
Abstract
A central clinical challenge regarding the surgical treatment of bone and joint conditions is the eventual loosening of an orthopedic implant as a result of insufficient bone ingrowth at the bone-implant interface. We investigated the in vivo effectiveness of a coating containing recombinant human bone morphogenetic protein-2 (rhBMP-2)-loaded microspheres applied to acid-etched Ti6Al4V cylinders for implantation. Three groups of rabbits (24 per group) were used for implantation: (1) acid-etched Ti6Al4V implants coated with a mixture of rhBMP-2-loaded microspheres (125 ng rhBMP-2/mg microspheres) and α-butyl cyanoacrylate; (2) acid-etched, uncoated implants; and (3) bare, smooth uncoated implants. After implantation, 12 rabbits from each group were used for bone ingrowth determination at 4, 5, 6, 7, 8, and 12 weeks (2 rabbits per time point), while the remainder were used for histological analysis and push-out testing at 12 weeks. Scanning electron microscopy showed significant improvement in bone growth of the rhBMP-2 microspheres/α-butyl cyanoacrylate group compared with the other groups (p<0.01). Histological analysis and push-out testing also demonstrated enhanced bone growth of the rhBMP-2 group over that in the other two groups (p<0.01). The rhBMP-2 group showed the most significant bone growth, suggesting that coating acid-etched implants with a mixture of rhBMP-2-loaded microspheres and α-butyl cyanoacrylate may be an effective method to improve the osseointegration of orthopedic implants.
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Affiliation(s)
- Yangmu Fu
- Department of Orthopedics, Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
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