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Menger MM, Stief M, Scheuer C, Rollmann MF, Herath SC, Braun BJ, Ehnert S, Nussler AK, Menger MD, Laschke MW, Histing T. Diclofenac, a NSAID, delays fracture healing in aged mice. Exp Gerontol 2023; 178:112201. [PMID: 37169100 DOI: 10.1016/j.exger.2023.112201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 05/06/2023] [Accepted: 05/08/2023] [Indexed: 05/13/2023]
Abstract
Nonsteroidal anti-inflammatory drugs (NSAIDs), such as diclofenac, belong to the most prescribed analgesic medication after traumatic injuries. However, there is accumulating evidence that NSAIDs impair fracture healing. Because bone regeneration in aged patients is subject to significant changes in cell differentiation and proliferation as well as a markedly altered pharmacological action of drugs, we herein analyzed the effects of diclofenac on bone healing in aged mice using a stable closed femoral facture model. Thirty-three mice (male n = 14, female n = 19) received a daily intraperitoneal injection of diclofenac (5 mg/kg body weight). Vehicle-treated mice (n = 29; male n = 13, female n = 16) served as controls. Fractured mice femora were analyzed by means of X-ray, biomechanics, micro computed tomography (μCT), histology and Western blotting. Biomechanical analyses revealed a significantly reduced bending stiffness in diclofenac-treated animals at 5 weeks after fracture when compared to vehicle-treated controls. Moreover, the callus tissue in diclofenac-treated aged animals exhibited a significantly reduced amount of bone tissue and higher amounts of fibrous tissue. Further histological analyses demonstrated less lamellar bone after diclofenac treatment, indicating a delay in callus remodeling. This was associated with a decreased number of osteoclasts and an increased expression of osteoprotegerin (OPG) during the early phase of fracture healing. These findings indicate that diclofenac delays fracture healing in aged mice by affecting osteogenic growth factor expression and bone formation as well as osteoclast activity and callus remodeling.
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Affiliation(s)
- Maximilian M Menger
- Department of Trauma and Reconstructive Surgery, Eberhard Karls University Tuebingen, BG Trauma Center Tuebingen, 72076 Tuebingen, Germany; Institute for Clinical & Experimental Surgery, Saarland University, 66421 Homburg, Saar, Germany.
| | - Maximilian Stief
- Institute for Clinical & Experimental Surgery, Saarland University, 66421 Homburg, Saar, Germany
| | - Claudia Scheuer
- Institute for Clinical & Experimental Surgery, Saarland University, 66421 Homburg, Saar, Germany
| | - Mika F Rollmann
- Department of Trauma and Reconstructive Surgery, Eberhard Karls University Tuebingen, BG Trauma Center Tuebingen, 72076 Tuebingen, Germany
| | - Steven C Herath
- Department of Trauma and Reconstructive Surgery, Eberhard Karls University Tuebingen, BG Trauma Center Tuebingen, 72076 Tuebingen, Germany
| | - Benedikt J Braun
- Department of Trauma and Reconstructive Surgery, Eberhard Karls University Tuebingen, BG Trauma Center Tuebingen, 72076 Tuebingen, Germany
| | - Sabrina Ehnert
- Department of Trauma and Reconstructive Surgery, Eberhard Karls University Tuebingen, BG Trauma Center Tuebingen, 72076 Tuebingen, Germany; Department of Trauma and Reconstructive Surgery, BG Trauma Center Tuebingen, Siegfried Weller Institute for Trauma Research, Eberhard Karls University Tuebingen, 72076 Tuebingen, Germany
| | - Andreas K Nussler
- Department of Trauma and Reconstructive Surgery, Eberhard Karls University Tuebingen, BG Trauma Center Tuebingen, 72076 Tuebingen, Germany; Department of Trauma and Reconstructive Surgery, BG Trauma Center Tuebingen, Siegfried Weller Institute for Trauma Research, Eberhard Karls University Tuebingen, 72076 Tuebingen, Germany
| | - Michael D Menger
- Institute for Clinical & Experimental Surgery, Saarland University, 66421 Homburg, Saar, Germany
| | - Matthias W Laschke
- Institute for Clinical & Experimental Surgery, Saarland University, 66421 Homburg, Saar, Germany
| | - Tina Histing
- Department of Trauma and Reconstructive Surgery, Eberhard Karls University Tuebingen, BG Trauma Center Tuebingen, 72076 Tuebingen, Germany
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Araki Y, Yamamoto N, Hayashi K, Takeuchi A, Miwa S, Igarashi K, Higuchi T, Abe K, Taniguchi Y, Yonezawa H, Morinaga S, Asano Y, Nojima T, Taki J, Tsuchiya H. A Viability Analysis of Tumor-Bearing Frozen Autograft for the Reconstruction After Resection of Malignant Bone Tumors Using 99m Tc-MDP Scintigraphy. Clin Nucl Med 2023; 48:25-34. [PMID: 36240999 DOI: 10.1097/rlu.0000000000004436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
PURPOSE OF THE REPORT Several methods are used to reconstruct bony defects after malignant tumor excision. Tumor-bearing frozen autograft reconstruction is a biological procedure in which tumor-bearing bone is reused after devitalization with liquid nitrogen to kill tumor cells. The viability of frozen autografts has not been fully evaluated over time. We therefore aimed to evaluate the viability of devitalized bone grafts, using 99m Tc-MDP scintigraphy. PATIENTS AND METHODS Seventy-four patients who underwent frozen autograft reconstruction after the excision of a malignant bone tumor were enrolled. Two hundred forty-two postoperative 99m Tc-MDP scans were reviewed. For a quantitative analysis, the region of interest on the frozen bone segment and a symmetric region of interest on the contralateral normal area were manually set. The radioactive tracer uptake ratio was calculated by dividing the count density of the frozen bone segment by that of the contralateral normal area in each image. An uptake ratio of 0.9 to 1.1 was defined as a normalization of tracer uptake. RESULTS Normalization of tracer uptake was achieved in 95% to 97% of the cases by 60 months postoperatively, and earlier in the middle zone and peripheral zone in the pedicle freezing group in comparison to the free freezing group (both P = 0.03). Fracture and nonunion was associated with a low uptake ratio, whereas infection was associated with a high uptake ratio before the occurrence of the event. CONCLUSIONS The calculation of the uptake ratio using 99m Tc-MDP scans was an objective and accurate evaluation method. The period to normalization of tracer uptake in the pedicle frozen bone was significantly earlier than that in the free frozen bone. The postoperative complications can be also predicted.
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Affiliation(s)
- Yoshihiro Araki
- From the Department of Orthopaedic Surgery, Graduate School of Medical Sciences
| | - Norio Yamamoto
- From the Department of Orthopaedic Surgery, Graduate School of Medical Sciences
| | - Katsuhiro Hayashi
- From the Department of Orthopaedic Surgery, Graduate School of Medical Sciences
| | - Akihiko Takeuchi
- From the Department of Orthopaedic Surgery, Graduate School of Medical Sciences
| | - Shinji Miwa
- From the Department of Orthopaedic Surgery, Graduate School of Medical Sciences
| | - Kentaro Igarashi
- From the Department of Orthopaedic Surgery, Graduate School of Medical Sciences
| | - Takashi Higuchi
- From the Department of Orthopaedic Surgery, Graduate School of Medical Sciences
| | - Kensaku Abe
- From the Department of Orthopaedic Surgery, Graduate School of Medical Sciences
| | - Yuta Taniguchi
- From the Department of Orthopaedic Surgery, Graduate School of Medical Sciences
| | - Hirotaka Yonezawa
- From the Department of Orthopaedic Surgery, Graduate School of Medical Sciences
| | - Sei Morinaga
- From the Department of Orthopaedic Surgery, Graduate School of Medical Sciences
| | - Yohei Asano
- From the Department of Orthopaedic Surgery, Graduate School of Medical Sciences
| | | | - Junichi Taki
- Department of Nuclear Medicine, Kanazawa University, Kanazawa, Japan
| | - Hiroyuki Tsuchiya
- From the Department of Orthopaedic Surgery, Graduate School of Medical Sciences
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3
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Karanikola T, Cheva A, Sarafidou K, Myronidou-Tzouveleki M, Tsavdaridis I, Kontonasaki E, Tsirlis A. Effect of Diclofenac and Simvastatin on Bone Defect Healing-An In Vivo Animal Study. Biomimetics (Basel) 2022; 7:143. [PMID: 36278700 PMCID: PMC9589953 DOI: 10.3390/biomimetics7040143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 08/12/2023] Open
Abstract
Non-steroidal, anti-inflammatory drugs and statins are two widely prescribed drug classes that affect bone formation. The aim of this study was to elucidate the effect of diclofenac and simvastatin in artificial bone defect healing. One hundred and forty-four male Wistar rats were used, and the specimens were divided into groups, with respect to the route of drug administration and the type of defect healing (with or without collagen membrane), and subgroups, with respect to the study duration (2, 4 or 8 weeks). Diclofenac was intramuscularly administered while simvastatin was administered both systemically and locally. Animals were euthanized and specimens were histomorphometrically analyzed to evaluate the percentage of new bone formation (%). Bone healing that occurred without any intervention developed more steadily than that of all other groups. Diclofenac exerted a clear, direct inhibitory effect on bone healing and its systemic administration should be avoided. The systemic administration of simvastatin was related to severe myopathy, while the solvent for the local administration of simvastatin seemed to play significant role in bone growth, as simvastatin, when it is administered intraperitoneally in a DMSO solution, appeared to promote bone healing. Local administration may have a significant impact on bone healing and it should be further investigated with the type of solvent or carrier that is used, which both may play a significant role in bone repair induction.
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Affiliation(s)
- Theodora Karanikola
- Department of Oral Surgery, Implantology and Dental Radiology, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki (A.U.Th), 54124 Thessaloniki, Greece
| | - Angeliki Cheva
- Pathology Department, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki (A.U.Th), 54124 Thessaloniki, Greece
| | - Katia Sarafidou
- Department of Prosthodontics, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki (A.U.Th), 54124 Thessaloniki, Greece
| | - Maria Myronidou-Tzouveleki
- 1st Laboratory of Pharmacology, School of Health Sciences, Faculty of Medicine, Aristotle University of Thessaloniki, 56224 Thessaloniki, Greece
| | - Ioannis Tsavdaridis
- 1st Laboratory of Pharmacology, School of Health Sciences, Faculty of Medicine, Aristotle University of Thessaloniki, 56224 Thessaloniki, Greece
| | - Eleana Kontonasaki
- Department of Prosthodontics, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki (A.U.Th), 54124 Thessaloniki, Greece
| | - Anastasios Tsirlis
- Department of Oral Surgery, Implantology and Dental Radiology, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki (A.U.Th), 54124 Thessaloniki, Greece
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4
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Han X, Hu J, Zhao W, Lu H, Dai J, He Q. Hexapeptide induces M2 macrophage polarization via the JAK1/STAT6 pathway to promote angiogenesis in bone repair. Exp Cell Res 2022; 413:113064. [PMID: 35167829 DOI: 10.1016/j.yexcr.2022.113064] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 02/08/2022] [Accepted: 02/11/2022] [Indexed: 01/14/2023]
Abstract
Angiogenesis is essential for successful bone defect repair. In normal tissue repair, the physiological inflammatory response is the main regulator of angiogenesis through the activity of macrophages and the cytokines secreted by them. In particular, M2 macrophages which secrete high levels of PDGF-BB are typically considered to promote angiogenesis. A hexapeptide [WKYMVm, (Trp-Lys-Tyr-Met-Val-D-Met-NH2)] has been reported to modulate inflammatory activities. However, the underlying mechanisms by which WKYMVm regulates macrophages remain unclear. In this study, the possible involvement by which WKYMVm induces the polarization of macrophages and affects their behaviors was evaluated. In vitro results showed that macrophages were induced to an M2 rather than M1 phenotype and the M2 phenotype was enhanced by WKYMVm through activation of the JAK1/STAT6 signaling pathway. It was also found that WKYMVm played an important role in the PDGF-BB production increase and proangiogenic abilities in M2 macrophages. Consistent with the results in vitro, the elevated M2/M0 ratio induced by WKYMVm enhanced the formation of new blood vessels in a femoral defect mouse model. These findings suggest that WKYMVm could be a promising alternative strategy for angiogenesis in bone repair by inducing M2 macrophage polarization.
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Affiliation(s)
- Xinyun Han
- Institute for Clean Energy & Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing, 400715, China; Department of Orthopedics, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Junxian Hu
- Department of Orthopedics, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Wenbo Zhao
- Department of Orthopedics, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Hongwei Lu
- Department of Orthopedics, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Jingjin Dai
- Department of Biomedical Materials Science, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Qingyi He
- Department of Orthopedics, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, China.
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5
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Ramirez-GarciaLuna JL, Rangel-Berridi K, Olasubulumi OO, Rosenzweig DH, Henderson JE, Gawri R, Martineau PA. Enhanced Bone Remodeling After Fracture Priming. Calcif Tissue Int 2022; 110:349-366. [PMID: 34668029 DOI: 10.1007/s00223-021-00921-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 10/01/2021] [Indexed: 11/30/2022]
Abstract
The immune system is an active component of bone repair. Mast cells influence the recruitment of macrophages, osteoclasts and blood vessels into the repair tissue. We hypothesized that if mast cells and other immune cells are sensitized to recognize broken bone, they will mount an increased response to subsequent fractures that may be translated into enhanced healing. To test this, we created a bone defect on the left leg of anesthetized mice and 2 weeks later, a second one on the right leg. Bone repair in the right legs was then compared to control mice that underwent the creation of bilateral window bone defects at the same time. Mice were euthanized at 14 and 56 days. Mineralized tissue quantity and morphometric parameters were assessed using micro-CT and histology. The activity of osteoblasts, osteoclasts, vascular endothelial cells, mast cells, and macrophages was evaluated using histochemistry. Our main findings were (1) no significant differences in the amount of bone produced at 14- or 56 days post-operative between groups; (2) mice exposed to subsequent fractures showed significantly better bone morphometric parameters after 56 days post-operative; and (3) significant increases in the content of blood vessels, osteoclasts, and the number of macrophages in the subsequent fracture group. Our results provide strong evidence that a transient increase in the inflammatory state of a healing injury promotes faster bone remodelling and increased neo-angiogenesis. This phenomenon is also characterized by changes in mast cell and macrophage content that translate into more active recruitment of mesenchymal stromal cells.
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Affiliation(s)
- Jose L Ramirez-GarciaLuna
- Bone Engineering Labs, Injury, Repair & Recovery Program, Research Institute, McGill University Health Centre, 1650 Cedar Ave., Montreal, QC, H3G 1A4, Canada
- Experimental Surgery, Faculty of Medicine, McGill University, 3605 Rue de la Montagne, Montreal, QC, H3G 2M1, Canada
| | - Karla Rangel-Berridi
- Bone Engineering Labs, Injury, Repair & Recovery Program, Research Institute, McGill University Health Centre, 1650 Cedar Ave., Montreal, QC, H3G 1A4, Canada
- Biofabrication and Bioengineering Labs, Injury, Repair & Recovery Program, Research Institute, McGill University Health Centre, 1650 Cedar Ave., Montreal, QC, H3G 1A4, Canada
- Experimental Surgery, Faculty of Medicine, McGill University, 3605 Rue de la Montagne, Montreal, QC, H3G 2M1, Canada
| | - Ore-Oluwa Olasubulumi
- Bone Engineering Labs, Injury, Repair & Recovery Program, Research Institute, McGill University Health Centre, 1650 Cedar Ave., Montreal, QC, H3G 1A4, Canada
| | - Derek H Rosenzweig
- Biofabrication and Bioengineering Labs, Injury, Repair & Recovery Program, Research Institute, McGill University Health Centre, 1650 Cedar Ave., Montreal, QC, H3G 1A4, Canada
- Experimental Surgery, Faculty of Medicine, McGill University, 3605 Rue de la Montagne, Montreal, QC, H3G 2M1, Canada
| | - Janet E Henderson
- Bone Engineering Labs, Injury, Repair & Recovery Program, Research Institute, McGill University Health Centre, 1650 Cedar Ave., Montreal, QC, H3G 1A4, Canada
- Experimental Surgery, Faculty of Medicine, McGill University, 3605 Rue de la Montagne, Montreal, QC, H3G 2M1, Canada
- Experimental Medicine, Faculty of Medicine, McGill University, 3605 Rue de la Montagne, Montreal, QC, H3G 2M1, Canada
| | - Rahul Gawri
- Regenerative Orthopaedics and Innovation Laboratory, Injury, Repair & Recovery Program, Research Institute-McGill University Health Centre, 1650 Cedar Ave., Montreal, QC, H3G 1A4, Canada.
- Experimental Surgery, Faculty of Medicine, McGill University, 3605 Rue de la Montagne, Montreal, QC, H3G 2M1, Canada.
| | - Paul A Martineau
- Bone Engineering Labs, Injury, Repair & Recovery Program, Research Institute, McGill University Health Centre, 1650 Cedar Ave., Montreal, QC, H3G 1A4, Canada
- Regenerative Orthopaedics and Innovation Laboratory, Injury, Repair & Recovery Program, Research Institute-McGill University Health Centre, 1650 Cedar Ave., Montreal, QC, H3G 1A4, Canada
- Experimental Surgery, Faculty of Medicine, McGill University, 3605 Rue de la Montagne, Montreal, QC, H3G 2M1, Canada
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6
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Al-Hamed FS, Abu-Nada L, Rodan R, Sarrigiannidis S, Ramirez-Garcialuna JL, Moussa H, Elkashty O, Gao Q, Basiri T, Baca L, Torres J, Rancan L, Tran SD, Lordkipanidzé M, Kaartinen M, Badran Z, Tamimi F. Differences in platelet-rich plasma composition influence bone healing. J Clin Periodontol 2021; 48:1613-1623. [PMID: 34517437 DOI: 10.1111/jcpe.13546] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 07/26/2021] [Accepted: 09/01/2021] [Indexed: 12/18/2022]
Abstract
AIM Platelet-rich plasma (PRP) is an autologous blood-derived material that has been used to enhance bone regeneration. Clinical studies, however, reported inconsistent outcomes. This study aimed to assess the effect of changes in leucocyte and PRP (L-PRP) composition on bone defect healing. MATERIALS AND METHODS L-PRPs were prepared using different centrifugation methods and their regenerative potential was assessed in an in-vivo rat model. Bilateral critical-size tibial bone defects were created and filled with single-spin L-PRP, double-spin L-PRP, or filtered L-PRP. Empty defects and defects treated with collagen scaffolds served as controls. Rats were euthanized after 2 weeks, and their tibias were collected and analysed using micro-CT and histology. RESULTS Double-spin L-PRP contained higher concentrations of platelets than single-spin L-PRP and filtered L-PRP. Filtration of single-spin L-PRP resulted in lower concentrations of minerals and metabolites. In vivo, double-spin L-PRP improved bone healing by significantly reducing the size of bone defects (1.08 ± 0.2 mm3 ) compared to single-spin L-PRP (1.42 ± 0.27 mm3 ) or filtered L-PRP (1.38 ± 0.28 mm3 ). There were fewer mast cells, lymphocytes, and macrophages in defects treated with double-spin L-PRP than in those treated with single-spin or filtered L-PRP. CONCLUSION The preparation method of L-PRP affects their composition and potential to regenerate bone.
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Affiliation(s)
| | - Lina Abu-Nada
- Faculty of Dentistry, McGill University, Montreal, Canada
| | - Rania Rodan
- Faculty of Dentistry, McGill University, Montreal, Canada
| | - Stylianos Sarrigiannidis
- Centre for the Cellular Microenvironment, School of Engineering, University of Glasgow, Glasgow, UK
| | - Jose Luis Ramirez-Garcialuna
- Faculty of Medicine, McGill University, Montreal, Canada.,The Bone Engineering Labs, Research Institute McGill University Health Center, Montreal, Canada
| | - Hanan Moussa
- Faculty of Dentistry, McGill University, Montreal, Canada.,Faculty of Dentistry, Benghazi University, Benghazi, Libya
| | - Osama Elkashty
- Faculty of Dentistry, McGill University, Montreal, Canada.,Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Qiman Gao
- Faculty of Dentistry, McGill University, Montreal, Canada
| | - Tayebeh Basiri
- Faculty of Dentistry, McGill University, Montreal, Canada
| | - Laura Baca
- Dental Clinical Specialities Department, Faculty of Dentistry, Complutense University, Madrid, Spain
| | - Jesus Torres
- Dental Clinical Specialities Department, Faculty of Dentistry, Complutense University, Madrid, Spain
| | - Lisa Rancan
- Department of Biochemistry & Molecular Biology, Faculty of Medicine, Complutense University of Madrid, Madrid, Spain
| | - Simon D Tran
- Faculty of Dentistry, McGill University, Montreal, Canada
| | - Marie Lordkipanidzé
- Faculté de Pharmacie, Université de Montréal, Montreal, Canada.,Research Center, Montreal Heart Institute, Montreal, Canada
| | - Mari Kaartinen
- Faculty of Dentistry, McGill University, Montreal, Canada
| | - Zahi Badran
- Department of Periodontology (CHU/Rmes Inserm U1229/UIC11), Faculty of Dental Surgery, University of Nantes, Nantes, France.,College of Dental Medicine, University of Sharjah, Sharjah, UAE
| | - Faleh Tamimi
- College of Dental Medicine, Qatar University, Doha, Qatar
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7
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Fairag R, Li L, Ramirez-GarciaLuna JL, Taylor MS, Gaerke B, Weber MH, Rosenzweig DH, Haglund L. A Composite Lactide-Mineral 3D-Printed Scaffold for Bone Repair and Regeneration. Front Cell Dev Biol 2021; 9:654518. [PMID: 34307346 PMCID: PMC8299729 DOI: 10.3389/fcell.2021.654518] [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: 01/16/2021] [Accepted: 06/21/2021] [Indexed: 01/08/2023] Open
Abstract
Orthopedic tumor resection, trauma, or degenerative disease surgeries can result in large bone defects and often require bone grafting. However, standard autologous bone grafting has been associated with donor site morbidity and/or limited quantity. As an alternate, allografts with or without metallic or polyether-etherketone have been used as grafting substitutes. However, these may have drawbacks as well, including stress shielding, pseudarthrosis, disease-transmission, and infection. There is therefore a need for alternative bone substitutes, such as the use of mechanically compliant three-dimensional (3D)-printed scaffolds. Several off-the-shelf materials are available for low-cost fused deposition 3D printing such as polylactic acid (PLA) and polycaprolactone (PCL). We have previously described the feasibility of 3D-printed PLA scaffolds to support cell activity and extracellular matrix deposition. In this study, we investigate two medical-grade filaments consistent with specifications found in American Society for Testing and Materials (ASTM) standard for semi-crystalline polylactide polymers for surgical implants, a pure polymer (100M) and a copolymeric material (7415) for their cytocompatibility and suitability in bone tissue engineering. Moreover, we assessed the impact on osteo-inductive properties with the addition of beta-tricalcium phosphate (β-TCP) minerals and assessed their mechanical properties. 100M and 7415 scaffolds with the additive β-TCP demonstrated superior mesenchymal stem cells (MSCs) differentiation detected via increased alkaline phosphatase activity (6-fold and 1.5-fold, respectively) and mineralized matrix deposition (14-fold and 5-fold, respectively) in vitro. Furthermore, we evaluated in vivo compatibility, biosafety and bone repair potential in a rat femur window defect model. 100M+β -TCP implants displayed a positive biosafety profile and showed significantly enhanced new bone formation compared to 100M implants evidenced by μCT (39 versus 25% bone volume/tissue volume ratio) and histological analysis 6 weeks post-implantation. These scaffolds are encouraging composite biomaterials for repairing bone applications with a great potential for clinical translation. Further analyses are required with appropriate evaluation in a larger critical-sized defect animal model with long-term follow-up.
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Affiliation(s)
- Rayan Fairag
- Department of Surgery, Division of Orthopaedic Surgery, McGill University, Montreal, QC, Canada
- Research Institute of McGill University Health Center, Montreal General Hospital, Montreal, QC, Canada
- Department of Orthopedic Surgery, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Li Li
- Department of Surgery, Division of Orthopaedic Surgery, McGill University, Montreal, QC, Canada
- Research Institute of McGill University Health Center, Montreal General Hospital, Montreal, QC, Canada
| | | | | | | | - Michael H. Weber
- Department of Surgery, Division of Orthopaedic Surgery, McGill University, Montreal, QC, Canada
- Research Institute of McGill University Health Center, Montreal General Hospital, Montreal, QC, Canada
| | - Derek H. Rosenzweig
- Department of Surgery, Division of Orthopaedic Surgery, McGill University, Montreal, QC, Canada
- Research Institute of McGill University Health Center, Montreal General Hospital, Montreal, QC, Canada
| | - Lisbet Haglund
- Department of Surgery, Division of Orthopaedic Surgery, McGill University, Montreal, QC, Canada
- Research Institute of McGill University Health Center, Montreal General Hospital, Montreal, QC, Canada
- Shriners Hospital for Children, Montreal, QC, Canada
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8
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Hadidi L, Ge S, Comeau-Gauthier M, Ramirez-Garcia Luna J, Harvey EJ, Merle G. Local Delivery of Therapeutic Boron for Bone Healing Enhancement. J Orthop Trauma 2021; 35:e165-e170. [PMID: 33844665 DOI: 10.1097/bot.0000000000001974] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/15/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVES To evaluate if local delivery of boron can accelerate bone healing and examine if the bioactive salt impacts the osteogenic response of bone-derived osteoclasts and osteoblasts by the regulation of the Wnt/β-catenin pathway. METHODS Bilateral femoral cortical defects were created in 32 skeletally mature C57 mice. On the experimental side, boric acid (8 mg/kg concentration) was injected locally, whereas on the control side, saline was used. Mice were euthanized at 7, 14, and 28 days. MicroCT was used to quantify bone regeneration at the defect. Histological staining for alkaline phosphatase and tartrate-resistant acid phosphatase was used to quantify osteoblast and osteoclast activity, respectively. Immunohistochemical antibodies, β-catenin, and CD34 were used to quantify active β-catenin levels and angiogenesis, respectively. RESULTS The boron group exhibited higher bone volume and trabecular thickness at 28 days on microCT. Both alkaline phosphatase activity and β-catenin activity was significantly higher in the boron group at 7 days. In addition, CD34 staining revealed increased angiogenesis at 14 days in boron-treated groups. We found boron to have no association with osteoclast activity. CONCLUSIONS This study shows that local delivery of boron is associated with an increase in osteoblast activity at early phases of healing. The corresponding increase in β-catenin likely supports that boron increases osteoblast activity by the Wnt/β-catenin pathway. Increased angiogenesis at 14 days could be a separate mechanism of increasing bone formation that is independent of Wnt/β-catenin activation.
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Affiliation(s)
- Lina Hadidi
- McGill University Division of Orthopedic Surgery, Montreal General Hospital, Montreal, QC, Canada
- Department of Experimental Surgery, Faculty of Medicine, McGill University, Montreal, QC, Canada ; and
| | - Susan Ge
- McGill University Division of Orthopedic Surgery, Montreal General Hospital, Montreal, QC, Canada
- Department of Experimental Surgery, Faculty of Medicine, McGill University, Montreal, QC, Canada ; and
| | - Marianne Comeau-Gauthier
- McGill University Division of Orthopedic Surgery, Montreal General Hospital, Montreal, QC, Canada
- Department of Experimental Surgery, Faculty of Medicine, McGill University, Montreal, QC, Canada ; and
| | - Jose Ramirez-Garcia Luna
- McGill University Division of Orthopedic Surgery, Montreal General Hospital, Montreal, QC, Canada
- Department of Experimental Surgery, Faculty of Medicine, McGill University, Montreal, QC, Canada ; and
| | - Edward J Harvey
- McGill University Division of Orthopedic Surgery, Montreal General Hospital, Montreal, QC, Canada
- Department of Experimental Surgery, Faculty of Medicine, McGill University, Montreal, QC, Canada ; and
| | - Geraldine Merle
- Chemical Engineering Department, Ecole Polytechnique de Montreal, Montreal, QC, Canada
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Park H, Collignon AM, Lepry WC, Ramirez-GarciaLuna JL, Rosenzweig DH, Chaussain C, Nazhat SN. Acellular dense collagen-S53P4 bioactive glass hybrid gel scaffolds form more bone than stem cell delivered constructs. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 120:111743. [PMID: 33545885 DOI: 10.1016/j.msec.2020.111743] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 10/21/2020] [Accepted: 11/13/2020] [Indexed: 01/07/2023]
Abstract
Dense collagen (DC) gels facilitate the osteoblastic differentiation of seeded dental pulp stem cells (DPSCs) and undergo rapid acellular mineralization when incorporated with bioactive glass particles, both in vitro and subcutaneously in vivo. However, the potential of DC-bioactive glass hybrid gels in delivering DPSCs for bone regeneration in an osseous site has not been investigated. In this study, the efficacies of both acellular and DPSC-seeded DC-S53P4 bioactive glass [(53)SiO2-(23)Na2O-(20)CaO-(4)P2O5, wt%] hybrid gels were investigated in a critical-sized murine calvarial defect. The incorporation of S53P4, an osteostimulative bioactive glass, into DC gels led to its accelerated acellular mineralization in simulated body fluid (SBF), in vitro, where hydroxycarbonated apatite was detected within 1 day. By day 7 in SBF, micro-mechanical analysis demonstrated an 8-fold increase in the compressive modulus of the mineralized gels. The in-situ effect of the bioactive glass on human-DPSCs within DC-S53P4 was evident, by their osteogenic differentiation in the absence of osteogenic supplements. The production of alkaline phosphatase and collagen type I was further increased when cultured in osteogenic media. This osteostimulative effect of DC-S53P4 constructs was confirmed in vivo, where after 8 weeks implantation, both acellular scaffolds and DPSC-seeded DC-S53P4 constructs formed mineralized and vascularized bone matrices with osteoblastic and osteoclastic cell activity. Surprisingly, however, in vivo micro-CT analysis confirmed that the acellular scaffolds generated larger volumes of bone, already visible at week 3 and exhibiting superior trabecular architecture. The results of this study suggest that DC-S53P4 scaffolds negate the need for stem cell delivery for effective bone tissue regeneration and may expedite their path towards clinical applications.
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Affiliation(s)
- Hyeree Park
- Department of Mining and Materials Engineering, McGill University, Canada
| | - Anne-Margaux Collignon
- Université de Paris, URP 2496 Laboratory Orofacial Pathologies, Imaging, and Biotherapies and Life Imaging Platform (PIV), Montrouge, France; AP-HP, GH Nord Université de Paris (Louis Mourier and Bretonneau hospitals), France
| | - William C Lepry
- Department of Mining and Materials Engineering, McGill University, Canada
| | | | - Derek H Rosenzweig
- Division of Orthopedic Surgery, McGill University, Canada; Injury, Repair and Recovery Program, Research Institute of McGill University Health Centre, Canada
| | - Catherine Chaussain
- Université de Paris, URP 2496 Laboratory Orofacial Pathologies, Imaging, and Biotherapies and Life Imaging Platform (PIV), Montrouge, France; AP-HP, GH Nord Université de Paris (Louis Mourier and Bretonneau hospitals), France
| | - Showan N Nazhat
- Department of Mining and Materials Engineering, McGill University, Canada.
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Comeau-Gauthier M, Tarchala M, Luna JLRG, Harvey E, Merle G. Unleashing β-catenin with a new anti-Alzheimer drug for bone tissue regeneration. Injury 2020; 51:2449-2459. [PMID: 32829895 DOI: 10.1016/j.injury.2020.07.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 07/18/2020] [Indexed: 02/02/2023]
Abstract
The Wnt/β-catenin signaling pathway is critical for bone differentiation and regeneration. Tideglusib, a selective FDA approved glycogen synthase kinase-3β (GSK-3β) inhibitor, has been shown to promote dentine formation, but its effect on bone has not been examined. Our objective was to study the effect of localized Tideglusib administration on bone repair. Bone healing between Tideglusib treated and control mice was analysed at 7, 14 and 28 days postoperative (PO) with microCT, dynamic histomorphometry and immunohistology. There was a local downregulation of GSK-3β in Tideglusib animals, resulting in a significant increase in the amount of new bone formation with both enhanced cortical bone bridging and medullary bone deposition. The bone formation in the Tideglusib group was characterized by early osteoblast differentiation with down-regulation of GSK-3β at day 7 and 14, and higher accumulation of active β-catenin at day 14. Here, for the first time, we show a positive effect of Tideglusib on bone formation through the inactivation of GSK-3β. Furthermore, the findings suggest that Tideglusib does not interfere with precursor cell recruitment and commitment, contrary to other GSK-3β antagonists such as lithium chloride. Taken together, the results indicate that Tideglusib could be used directly at a fracture site during the initial intraoperative internal fixation without the need for further surgery, injection or drug delivery system. This FDA-approved drug may be useful in the future for the prevention of non-union in patients presenting with a high risk for fracture-healing.
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Affiliation(s)
- Marianne Comeau-Gauthier
- Department of Surgery, Division of Orthopedic Surgery, McGill University, Montreal, Canada; Experimental Surgery, Faculty of Medicine, McGill University. Rue de la Montaigne, Montreal, QC, Canada.
| | - Magdalena Tarchala
- Department of Surgery, Division of Orthopedic Surgery, McGill University, Montreal, Canada; Montreal General Hospital, 1650 Cedar Avenue, Room A10-110, Montreal, Qc., H3G 1A4 Canada.
| | - Jose Luis Ramirez-Garcia Luna
- Department of Surgery, Division of Orthopedic Surgery, McGill University, Montreal, Canada; Experimental Surgery, Faculty of Medicine, McGill University. Rue de la Montaigne, Montreal, QC, Canada; Montreal General Hospital, 1650 Cedar Avenue, Room A10-110, Montreal, Qc., H3G 1A4 Canada.
| | - Edward Harvey
- Department of Surgery, Division of Orthopedic Surgery, McGill University, Montreal, Canada; Bone Engineering Labs, Montreal General Hospital, 1650 Cedar Avenue, Room C10-124, Montreal, Qc., H3G 1A4 Canada.
| | - Geraldine Merle
- Chemical Engineering Department, Polytechnique J.-A.-Bombardier building Polytechnique Montréal C.P. 6079, succ. Centre-ville, Montréal (Québec), H3C 3A7, Canada.
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11
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Cooke ME, Ramirez-GarciaLuna JL, Rangel-Berridi K, Park H, Nazhat SN, Weber MH, Henderson JE, Rosenzweig DH. 3D Printed Polyurethane Scaffolds for the Repair of Bone Defects. Front Bioeng Biotechnol 2020; 8:557215. [PMID: 33195122 PMCID: PMC7644785 DOI: 10.3389/fbioe.2020.557215] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 09/18/2020] [Indexed: 01/08/2023] Open
Abstract
Critical-size bone defects are those that will not heal without intervention and can arise secondary to trauma, infection, and surgical resection of tumors. Treatment options are currently limited to filling the defect with autologous bone, of which there is not always an abundant supply, or ceramic pastes that only allow for limited osteo-inductive and -conductive capacity. In this study we investigate the repair of bone defects using a 3D printed LayFomm scaffold. LayFomm is a polymer blend of polyvinyl alcohol (PVA) and polyurethane (PU). It can be printed using the most common method of 3D printing, fused deposition modeling, before being washed in water-based solutions to remove the PVA. This leaves a more compliant, micro-porous PU elastomer. In vitro analysis of dental pulp stem cells seeded onto macro-porous scaffolds showed their ability to adhere, proliferate and form mineralized matrix on the scaffold in the presence of osteogenic media. Subcutaneous implantation of LayFomm in a rat model showed the formation of a vascularized fibrous capsule, but without a chronic inflammatory response. Implantation into a mandibular defect showed significantly increased mineralized tissue production when compared to a currently approved bone putty. While their mechanical properties are insufficient for use in load-bearing defects, these findings are promising for the use of polyurethane scaffolds in craniofacial bone regeneration.
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Affiliation(s)
- Megan E. Cooke
- Biofabrication Laboratory, Research Institute of McGill University Health Centres, McGill University, Montreal, QC, Canada
- Department of Surgery, McGill University, Montreal, QC, Canada
| | - Jose L. Ramirez-GarciaLuna
- Department of Surgery, McGill University, Montreal, QC, Canada
- Bone Engineering Labs, Injury, Repair & Recovery Program, Research Institute McGill University Health Centres, McGill University, Montreal, QC, Canada
| | - Karla Rangel-Berridi
- Department of Surgery, McGill University, Montreal, QC, Canada
- Bone Engineering Labs, Injury, Repair & Recovery Program, Research Institute McGill University Health Centres, McGill University, Montreal, QC, Canada
| | - Hyeree Park
- Department of Mining and Materials Engineering, McGill University, Montreal, QC, Canada
| | - Showan N. Nazhat
- Department of Mining and Materials Engineering, McGill University, Montreal, QC, Canada
| | - Michael H. Weber
- Biofabrication Laboratory, Research Institute of McGill University Health Centres, McGill University, Montreal, QC, Canada
- Department of Surgery, McGill University, Montreal, QC, Canada
| | - Janet E. Henderson
- Department of Surgery, McGill University, Montreal, QC, Canada
- Bone Engineering Labs, Injury, Repair & Recovery Program, Research Institute McGill University Health Centres, McGill University, Montreal, QC, Canada
| | - Derek H. Rosenzweig
- Biofabrication Laboratory, Research Institute of McGill University Health Centres, McGill University, Montreal, QC, Canada
- Bone Engineering Labs, Injury, Repair & Recovery Program, Research Institute McGill University Health Centres, McGill University, Montreal, QC, Canada
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12
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Angiogenesis in Wound Healing following Pharmacological and Toxicological Exposures. CURRENT PATHOBIOLOGY REPORTS 2020. [DOI: 10.1007/s40139-020-00212-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Alshahrani NS, Abu-Nada L, Ramirez Garcia-Luna JL, Al-Hamed FS, Alamri A, Makhoul NM, Tamimi F. Ranitidine Impairs Bone Healing and Implant Osseointegration in Rats' Tibiae. J Oral Maxillofac Surg 2020; 78:1943-1952. [PMID: 32687794 DOI: 10.1016/j.joms.2020.06.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 06/18/2020] [Accepted: 06/18/2020] [Indexed: 12/22/2022]
Abstract
PURPOSE Ranitidine has been found to have an impact on bone metabolism by suppressing osteoclastogenesis. We hypothesized that the use of ranitidine would impair bone healing and implant osseointegration. This study investigated the effect of postoperative administration of ranitidine on bone healing and osseointegration in rats. MATERIALS AND METHODS Twenty-two Sprague-Dawley rats underwent surgery to create a unicortical bone defect in each tibia. A titanium implant was placed on the right tibial defect, whereas the contralateral defect was left unfilled. After surgery, the rats were randomly divided into 2 groups receiving a daily dose of ranitidine or saline solution for 14 days and then euthanized for assessment of bone healing and osseointegration using micro-computed tomography (CT) and histomorphometry. RESULTS Micro-CT analysis of the bone defect showed a larger bone defect volume in the ranitidine group (0.82 ± 0.13 μL vs 0.66 ± 0.16 μL, P = .034), thinner cortical thickness (0.54 ± 0.07 mm vs 0.63 ± 0.11 mm, P = .026), and less bone regeneration at the defect site (40% ± 12% vs 57% ± 11%, P = .003). Implant-site micro-CT analysis showed less osseointegration in the ranitidine group (34.1% ± 2.7% vs 43.5% ± 2.1%, P = .014), and implant-site histologic analysis showed less medullary (P = .021), cortical (P = .001), and total (P = .003) bone-implant contact and less peri-implant bone volume-tissue volume (P = .002) in the ranitidine group. Histologic analysis for osteoclastic activity showed a lower number of osteoclasts in the ranitidine group (4.8 ± 2.4 mm-2 vs 9.1 ± 2.1 mm-2, P = .026). CONCLUSIONS The postoperative use of ranitidine impaired bone healing and osseointegration.
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Affiliation(s)
- Nasser S Alshahrani
- Resident in Oral and Maxillofacial Surgery, Biomedical Dental Sciences Department, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia; and Department of Dentistry and Oral and Maxillofacial Surgery, McGill University Health Centre, Montreal, Quebec, Canada
| | - Lina Abu-Nada
- PhD Candidate, Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
| | - Jose Luis Ramirez Garcia-Luna
- PhD Candidate, The Bone Engineering Labs, Injury Recovery Repair Program, Research Institute, McGill University Health Center, Montreal, Quebec, Canada; and Department of Surgery, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Faez Saleh Al-Hamed
- PhD Candidate, Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
| | - Abdulaziz Alamri
- Assistant Professor, Preventive Dental Sciences Department, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Nicholas M Makhoul
- Head of Department, Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, McGill University, Montreal, Quebec, Canada; and Associate Professor, Department of Dentistry and Oral and Maxillofacial Surgery, McGill University Health Centre, Montreal, Quebec, Canada
| | - Faleh Tamimi
- Associate Professor, Faculty of Dentistry, McGill University, Montreal, Quebec, Canada; and Professor, College of Dental Medicine, Health Cluster, Qatar University, Doha, Qatar.
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Fascia Iliaca Block Decreases Hip Fracture Postoperative Opioid Consumption: A Prospective Randomized Controlled Trial. J Orthop Trauma 2020; 34:49-54. [PMID: 31469752 DOI: 10.1097/bot.0000000000001634] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVES To determine the efficacy of a preoperative fascia iliaca compartment block in decreasing postoperative pain and improving functional recovery after hip fracture surgery. DESIGN Randomized prospective Level 1 therapeutic. SETTING Academic Level 1 trauma center. PATIENTS Geriatric patients with fractures of the proximal femur (neck, intertrochanteric, or subtrochanteric regions) were prospectively randomized into an experimental (A) or control (B) groups. Forty-seven patients met inclusion criteria, 23 randomized to the experimental group and 24 to the control group. INTERVENTION Patients randomized to the experimental group received an ultrasound-guided fascia iliaca compartment block administered by a board-certified anesthesiologist immediately before the initiation of anesthesia. MAIN OUTCOME MEASUREMENTS Primary outcome measure was postoperative pain medication consumption until postoperative day 3. Secondary outcomes included functional recovery and a study-specific patient-reported satisfaction survey assessed on postoperative day 3. RESULTS There was no significant difference in consumption of acetaminophen for mild pain, tramadol for moderate pain, or functional recovery between the 2 groups. There was a statistically significant decrease in morphine consumption (0.4 mg vs. 19.4 mg, P = 0.05) and increase in patient-reported satisfaction (31%, P = 0.01). CONCLUSIONS Preoperative fascia iliaca compartment block significantly decreases postoperative opioid consumption while improving patient satisfaction. We recommend the integration of this safe and efficacious modality into institutional geriatric hip fracture protocols as an adjunctive pain control strategy. LEVEL OF EVIDENCE Therapeutic Level II See Instructions for Authors for a complete description of levels of evidence.
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15
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Miller-Rhodes P, Kong C, Baht GS, Saminathan P, Rodriguiz RM, Wetsel WC, Gelbard HA, Terrando N. The broad spectrum mixed-lineage kinase 3 inhibitor URMC-099 prevents acute microgliosis and cognitive decline in a mouse model of perioperative neurocognitive disorders. J Neuroinflammation 2019; 16:193. [PMID: 31660984 PMCID: PMC6816182 DOI: 10.1186/s12974-019-1582-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 09/10/2019] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Patients with pre-existing neurodegenerative disease commonly experience fractures that require orthopedic surgery. Perioperative neurocognitive disorders (PND), including delirium and postoperative cognitive dysfunction, are serious complications that can result in increased 1-year mortality when superimposed on dementia. Importantly, there are no disease-modifying therapeutic options for PND. Our lab developed the "broad spectrum" mixed-lineage kinase 3 inhibitor URMC-099 to inhibit pathological innate immune responses that underlie neuroinflammation-associated cognitive dysfunction. Here, we test the hypothesis that URMC-099 can prevent surgery-induced neuroinflammation and cognitive impairment. METHODS Orthopedic surgery was performed by fracturing the tibia of the left hindlimb with intramedullary fixation under general anesthesia and analgesia. In a pilot experiment, 9-month-old mice were treated five times with URMC-099 (10 mg/kg, i.p.), spaced 12 h apart, with three doses prior to surgery and two doses following surgery. In this experiment, microgliosis was evaluated using unbiased stereology and blood-brain barrier (BBB) permeability was assessed using immunoglobulin G (IgG) immunostaining. In follow-up experiments, 3-month-old mice were treated only three times with URMC-099 (10 mg/kg, i.p.), spaced 12 h apart, prior to orthopedic surgery. Two-photon scanning laser microscopy and CLARITY with light-sheet microscopy were used to define surgery-induced changes in microglial dynamics and morphology, respectively. Surgery-induced memory impairment was assessed using the "What-Where-When" and Memory Load Object Discrimination tasks. The acute peripheral immune response to surgery was assessed by cytokine/chemokine profiling and flow cytometry. Finally, long-term fracture healing was assessed in fracture callouses using micro-computerized tomography (microCT) and histomorphometry analyses. RESULTS Orthopedic surgery induced BBB disruption and microglial activation, but had no effect on microglial process motility. Surgically treated mice exhibited impaired object place and identity discrimination in the "What-Where-When" and Memory Load Object Discrimination tasks. Both URMC-099 dosing paradigms prevented the neuroinflammatory sequelae that accompanied orthopedic surgery. URMC-099 prophylaxis had no effect on the mobilization of the peripheral innate immune response and fracture healing. CONCLUSIONS These findings show that prophylactic URMC-099 treatment is sufficient to prevent surgery-induced microgliosis and cognitive impairment without affecting fracture healing. Together, these findings provide compelling evidence for the advancement of URMC-099 as a therapeutic option for PND.
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Affiliation(s)
- Patrick Miller-Rhodes
- Center for Neurotherapeutics Discovery, University of Rochester Medical Center, Rochester, NY 14642 USA
- Department of Neuroscience, University of Rochester Medical Center, Rochester, NY 14642 USA
| | - Cuicui Kong
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University Medical Center, Durham, NC 27710 USA
| | - Gurpreet S. Baht
- Department of Orthopedic Surgery and Duke Molecular Physiology Institute, Duke University Medical Center, Durham, NC 27710 USA
| | - Priyanka Saminathan
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY 14642 USA
| | - Ramona M. Rodriguiz
- Department of Psychiatry and Behavioral Sciences, Mouse Behavioral and Neuroendocrine Analysis Core Facility, Duke University Medical Center, Durham, NC 27710 USA
| | - William C. Wetsel
- Department of Psychiatry and Behavioral Sciences, Mouse Behavioral and Neuroendocrine Analysis Core Facility, Duke University Medical Center, Durham, NC 27710 USA
- Departments of Neurobiology and Cell Biology, Duke University Medical Center, Durham, NC 27710 USA
| | - Harris A. Gelbard
- Center for Neurotherapeutics Discovery, University of Rochester Medical Center, Rochester, NY 14642 USA
- Department of Neuroscience, University of Rochester Medical Center, Rochester, NY 14642 USA
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY 14642 USA
- Department of Neurology, University of Rochester Medical Center, Rochester, NY 14642 USA
- Department of Pediatrics, University of Rochester Medical Center, Rochester, NY 14642 USA
| | - Niccolò Terrando
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University Medical Center, Durham, NC 27710 USA
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van der Kraan PM. The Interaction between Joint Inflammation and Cartilage Repair. Tissue Eng Regen Med 2019; 16:327-334. [PMID: 31413937 PMCID: PMC6675839 DOI: 10.1007/s13770-019-00204-z] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 07/10/2019] [Accepted: 07/12/2019] [Indexed: 11/01/2022] Open
Abstract
Background Articular cartilage lesions occur frequently but unfortunately damaged cartilage has a very limited intrinsic repair capacity. Therefore, there is a high need to develop technology that makes cartilage repair possible. Since joint damage will lead to (sterile) inflammation, development of this technology has to take into account the effects of inflammation on cartilage repair. Methods A literature search has been performed including combinations of the following keywords; cartilage repair, fracture repair, chondrogenesis, (sterile) inflammation, inflammatory factors, macrophage, innate immunity, and a number of individual cytokines. Papers were selected that described how inflammation or inflammatory factors affect chondrogenesis and tissue repair. A narrative review is written based on these papers focusing on the role of inflammation in cartilage repair and what we can learn from findings in other organs, especially fracture repair. Results The relationship between inflammation and tissue repair is not straightforward. Acute, local inflammation stimulates fracture repair but appears to be deleterious for chondrogenesis and cartilage repair. Systemic inflammation has a negative effect on all sorts of tissue repair. Conclusion Findings on the role of inflammation in fracture repair and cartilage repair are not in line. The currently widely used models of chondrogenesis, using high differentiation factor concentrations and corticosteroid levels, are not optimal. To make it possible to draw more valid conclusions about the role of inflammation and inflammatory factors on cartilage repair, model systems must be developed that better mimic the real conditions in a joint with damaged cartilage.
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Affiliation(s)
- Peter M. van der Kraan
- Experimental Rheumatology, Department of Rheumatology, Radboudumc, Radboud Institute for Molecular Life Sciences (RIMLS), Geert Grooteplein 26, 6525 GA Nijmegen, The Netherlands
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Fairag R, Rosenzweig DH, Ramirez-Garcialuna JL, Weber MH, Haglund L. Three-Dimensional Printed Polylactic Acid Scaffolds Promote Bone-like Matrix Deposition in Vitro. ACS APPLIED MATERIALS & INTERFACES 2019; 11:15306-15315. [PMID: 30973708 DOI: 10.1021/acsami.9b02502] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Large bone defects represent a significant challenge for clinicians and surgeons. Tissue engineering for bone regeneration represents an innovative solution for this dilemma and may yield attractive alternate bone substitutes. Three-dimensional (3D) printing with inexpensive desktop printers shows promise in generating high-resolution structures mimicking native tissues using biocompatible, biodegradable, and cost-effective thermoplastics, which are already FDA-approved for food use, drug delivery, and many medical devices. Microporous 3D-printed polylactic acid scaffolds, with different pore sizes (500, 750, and 1000 μm), were designed and manufactured using an inexpensive desktop 3D printer, and the mechanical properties were assessed. The scaffolds were compared for cell growth, activity, and bone-like tissue formation using primary human osteoblasts. Osteoblasts showed high proliferation, metabolic activity, and osteogenic matrix protein production, in which 750 μm pore-size scaffolds showed superiority. Further experimentation using human mesenchymal stem cells on 750 μm pore scaffolds showed their ability in supporting osteogenic differentiation. These findings suggest that even in the absence of any surface modifications, low-cost 750 μm pore-size 3D-printed scaffolds may be suitable as a bone substitute for repair of large bone defects.
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Affiliation(s)
- Rayan Fairag
- Orthopaedic Department, Faculty of Medicine , King Abdulaziz University , Jeddah 21589 , Saudi Arabia
| | | | | | | | - Lisbet Haglund
- Shriners Hospital for Children , Montreal H4A 0A9 , Canada
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