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Maruyama T, Nakamae T, Kamei N, Morisako T, Nakao K, Farid F, Fukui H, Adachi N. Development of a novel animal model of lumbar vertebral endplate lesion by intervertebral disk injection of monosodium iodoacetate in rats. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2024:10.1007/s00586-024-08179-9. [PMID: 38436876 DOI: 10.1007/s00586-024-08179-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 01/30/2024] [Accepted: 02/01/2024] [Indexed: 03/05/2024]
Abstract
PURPOSE Vertebral endplate lesions (EPLs) caused by severe disk degeneration are associated with low back pain. However, its pathophysiology remains unclear. In this study, we aimed to develop a vertebral EPL rat model mimicking severe intervertebral disk (IVD) degeneration by injecting monosodium iodoacetate (MIA) into the IVDs and evaluating it by assessing pain-related behavior, micro-computed tomography (CT) findings, and histological changes. METHODS MIA was injected into the L4-5 and L5-6 IVDs of Sprague-Dawley rats. Their behavior was examined by measuring the total distance traveled and the total number of rearing in an open square arena. Bone alterations and volume around the vertebral endplate were assessed using micro-CT. Safranin-O staining, immunohistochemistry, and tartrate-resistant acid phosphatase (TRAP) staining were performed for histological assessment. RESULTS The total distance and number of rearing times in the open field were significantly reduced in a time-dependent manner. Micro-CT revealed intervertebral osteophytes and irregularities in the endplates at 12 weeks. The bone volume/tissue volume (BV/TV) around the endplates significantly increased from 6 weeks onward. Safranin-O staining revealed severe degeneration of IVDs and endplate disorders in a dose- and time-dependent manner. Calcitonin gene-related peptide-positive nerve fibers significantly increased from 6 weeks onward. However, the number of osteoclasts decreased over time. CONCLUSION Our rat EPL model showed progressive morphological vertebral endplate changes in a time- and concentration-dependent manner, similar to the degenerative changes in human IVDs. This model can be used as an animal model of severe IVD degeneration to better understand the pathophysiology of EPL.
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Affiliation(s)
- Toshiaki Maruyama
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-Ku, HiroshimaHiroshima, 734-8551, Japan
| | - Toshio Nakamae
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-Ku, HiroshimaHiroshima, 734-8551, Japan.
| | - Naosuke Kamei
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-Ku, HiroshimaHiroshima, 734-8551, Japan
| | - Taiki Morisako
- Department of Orthopaedic Surgery, Miyoshi Central Hospital, Hiroshima, Japan
| | - Kazuto Nakao
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-Ku, HiroshimaHiroshima, 734-8551, Japan
| | - Fadlyansyah Farid
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-Ku, HiroshimaHiroshima, 734-8551, Japan
- Department of Orthopaedic and Traumatology, Faculty of Medicine, Hasanuddin University, Makassar, Indonesia
| | - Hiroki Fukui
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-Ku, HiroshimaHiroshima, 734-8551, Japan
| | - Nobuo Adachi
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-Ku, HiroshimaHiroshima, 734-8551, Japan
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Lee W, Georgas E, Komatsu DE, Qin YX. Daily low-intensity pulsed ultrasound stimulation mitigates joint degradation and pain in a post-traumatic osteoarthritis rat model. J Orthop Translat 2024; 44:9-18. [PMID: 38161708 PMCID: PMC10753057 DOI: 10.1016/j.jot.2023.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 08/22/2023] [Accepted: 09/12/2023] [Indexed: 01/03/2024] Open
Abstract
Objectives The aim of this study was to investigate the effects of low-intensity pulsed ultrasound (LIPUS) in a post-traumatic osteoarthritis (OA) rat model and in vitro. Methods Thirty-eight male, four-month-old Sprague Dawley rats were randomly assigned to Sham, Sham + US, OA, and OA + US. Sham surgery was performed to serve as a negative control, and anterior cruciate ligament transection was used to induce OA. Three days after the surgical procedures, Sham + US and OA + US animals received daily LIPUS treatment, while the rest of the groups received sham ultrasound (US) signals. Behavioral pain tests were performed at baseline and every week thereafter. After 31 days, the tissues were collected, and histological analyses were performed on knees and innervated dorsal root ganglia (DRG) neurons traced by retrograde labeling. Furthermore, to assess the activation of osteoclasts by LIPUS treatment, RAW264.7 cells were differentiated into osteoclasts and treated with LIPUS. Results Joint degradation in cartilage and bone microarchitecture were mitigated in OA + US compared to OA. OA + US showed improvements in behavioral pain tests. A significant increase of large soma-sized DRG neurons was located in OA compared to Sham. In addition, a greater percentage of large soma-sized innervated neurons were calcitonin gene-related peptide-positive. Daily LIPUS treatment suppressed osteoclastogenesis in vitro, which was confirmed via histological analyses and mRNA expression. Finally, lower expression of netrin-1, a sensory innervation-related protein, was found in the LIPUS treated cells. Conclusion Our findings demonstrate that early intervention using LIPUS treatment has protective effects from the progression of knee OA, including reduced tissue degradation, mitigated pain characteristics, improved subchondral bone microarchitecture, and less sensory innervation. Furthermore, daily LIPUS treatment has a suppressive effect on osteoclastogenesis, which may be linked to the suppression of sensory innervation in OA. The translational potential of this article This study presents a new potential for early intervention in treating OA symptoms through the use of LIPUS, which involves the suppression of osteoclastogenesis and the alteration of DRG profiles. This intervention aims to delay joint degradation and reduce pain.
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Affiliation(s)
- Wonsae Lee
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY, USA
| | - Elias Georgas
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY, USA
| | - David E. Komatsu
- Department of Orthopaedics and Rehabilitation, Stony Brook University, Stony Brook, NY, USA
| | - Yi-Xian Qin
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY, USA
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Lou Y, Song F, Kang Y, Xu Y. Periodic Mechanical Stress Inhibits the Development of Osteoarthritis via Regulating ATF3-Akt Axis. J Inflamm Res 2023; 16:5613-5628. [PMID: 38046403 PMCID: PMC10693248 DOI: 10.2147/jir.s419186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 10/25/2023] [Indexed: 12/05/2023] Open
Abstract
Purpose The development of osteoarthritis (OA) has been linked to mechanical factors. Studies suggest that periodic mechanical stress (PMS) may be a factor contributing to cartilage repair and the onset of OA. Therefore, this study was designed to explore the effects and underlying mechanisms of PMS on OA development. Patients and Methods Firstly, surgery and interleukin (IL)-1β were used for the establishment of rat/cell models of OA, respectively. Subsequently, activating transcription factor (ATF) 3 expression was knocked down in OA rats, and OA chondrocytes were treated with different heights (0, 1, 2, 4, 8 cm) of PMS or si-ATF. Safranin O staining was used to observe the histological changes in the rat knee joint, and enzyme-linked immunosorbent assay (ELISA) was performed to detect levels of tumor necrosis factor (TNF)-α, IL-6, and IL-8 in vivo and in vitro. Further, the expression of extracellular matrix (ECM) proteins in the rat knee joint was assessed immunohistochemistry. Flow cytometry was used to evaluate chondrocyte apoptosis. Lastly, Western blot was performed to detect the expression of related proteins of the protein kinase B (Akt) signaling pathway and ECM. Results The OA rat model was successfully constructed. Further experiments indicated that the knockdown of ATF3 not only alleviated joint swelling, pain, inflammatory response and pathological damage, but also promoted ECM synthesis and the phosphorylation of Akt in OA rats. In vitro experiments showed that PMS (4 cm) effectively inhibited cell apoptosis, decreased the levels of TNF-α, IL-6 and IL-8, promoted ECM synthesis, and activated the Akt signaling pathway in osteoarthritic chondrocytes. However, ATF3 overexpression reversed the positive effects of PMS on osteoarthritic chondrocytes. Conclusion PMS can effectively inhibit the development of OA, and its protective effects may be attributed to the down-regulation of ATF3 expression and activation of the Akt signaling pathway.
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Affiliation(s)
- Yi Lou
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Suzhou, 215006, People’s Republic of China
- Department of Orthopaedics, Shanghai Eastern Hepatobiliary Surgery Hospital, Naval Military Medical University, Shanghai, 201805, People’s Republic of China
| | - Fanglong Song
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, People’s Republic of China
| | - Yifan Kang
- Department of Orthopaedics, Shanghai Eastern Hepatobiliary Surgery Hospital, Naval Military Medical University, Shanghai, 201805, People’s Republic of China
| | - Yaozeng Xu
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Suzhou, 215006, People’s Republic of China
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Nekomoto A, Nakasa T, Ikuta Y, Ding C, Miyaki S, Adachi N. Feasibility of administration of calcitonin gene-related peptide receptor antagonist on attenuation of pain and progression in osteoarthritis. Sci Rep 2023; 13:15354. [PMID: 37717108 PMCID: PMC10505157 DOI: 10.1038/s41598-023-42673-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Accepted: 09/13/2023] [Indexed: 09/18/2023] Open
Abstract
Suppressing inflammation and abnormal subchondral bone turnover is essential for reducing osteoarthritis (OA) progression and pain relief. This study focused on calcitonin gene-related peptide (CGRP), which is involved in inflammation and bone metabolism, and investigated whether a CGRP receptor antagonist (rimegepant) could suppress OA progression and relieve pain in two OA models. C57BL/6 mice (10-week-old) underwent surgical destabilization of the medial meniscus, and Rimegepant (1.0 mg/kg/100 μL) or phosphate-buffered saline (100 μL) was administered weekly intraperitoneally after OA surgery and evaluated at 4, 8, and 12 weeks. In the senescence-accelerated mice (SAM)-prone 8 (SAMP8), rimegepant was administered weekly before and after subchondral bone sclerosis and sacrificed at 9 and 23 weeks, respectively. Behavioral assessment and immunohistochemical staining (CGRP) of the dorsal root ganglion (DRG) were conducted to assess pain. In DMM mice, synovitis, cartilage degeneration, and osteosclerosis were significantly suppressed in the rimegepant group. In SAMP8, synovitis, cartilage degeneration, and osteosclerosis were significantly suppressed by rimegepant at 9 weeks; however, not at 23 weeks. Behavioral assessment shows the traveled distance and the number of standings in the rimegepant group were significantly longer and higher. In addition, CGRP expression of the DRG was significantly lower in the rimegepant group at 8 and 12 weeks of DMM and 9 weeks of SAMP8 treatment. No adverse effects were observed in either of the mouse models. Inhibition of CGRP signaling has the potential to be a therapeutic target to prevent OA progression and suppress pain through the attenuation of subchondral bone sclerosis and synovitis.
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Affiliation(s)
- Akinori Nekomoto
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minamiku, Hiroshima, Hiroshima, 734-8551, Japan
| | - Tomoyuki Nakasa
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minamiku, Hiroshima, Hiroshima, 734-8551, Japan.
| | - Yasunari Ikuta
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minamiku, Hiroshima, Hiroshima, 734-8551, Japan
| | - Chenyang Ding
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minamiku, Hiroshima, Hiroshima, 734-8551, Japan
| | - Shigeru Miyaki
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minamiku, Hiroshima, Hiroshima, 734-8551, Japan
- Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
| | - Nobuo Adachi
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minamiku, Hiroshima, Hiroshima, 734-8551, Japan
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Kato Y, Nakasa T, Sumii J, Kanemitsu M, Ishikawa M, Miyaki S, Adachi N. Changes in the Subchondral Bone Affect Pain in the Natural Course of Traumatic Articular Cartilage Defects. Cartilage 2023; 14:247-255. [PMID: 36788469 PMCID: PMC10416198 DOI: 10.1177/19476035231154514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 12/31/2022] [Accepted: 01/02/2023] [Indexed: 02/16/2023] Open
Abstract
OBJECTIVE Articular cartilage defect causes joint pain and finally progresses to osteoarthritis. Although the subchondral bone condition affects clinical outcomes of cartilage defects, the natural course of changes in subchondral bone and associated pain in full-thickness cartilage defects remain unknown. Therefore, we investigated the natural course of histological changes in subchondral bone and joint pain in cartilage defects using a rat model. DESIGN Full-thickness cartilage defects were created at the medial femoral condyle of 10-week-old male Sprague-Dawley rats. Rats were sacrificed at 3, 7, 14, 28, and 56 days postoperatively, and histological including immunohistochemistry and tartrate-resistant acid phosphatase (TRAP) staining and micro-computed tomography (μCT) analyses of their knees were performed. Pain was evaluated using behavioral analysis and immunofluorescence staining of the dorsal root ganglion (DRG). RESULTS The contour of the subchondral bone plate was maintained until day 3, but it was absorbed just under the cartilage defect from day 7 to 14. Starting on day 28, sclerotic changes surrounding the bone absorption area were detected. In the subchondral bone, the number of TRAP-positive cells peaked on day 14. Osteocalcin-positive cells were observed at 7 days, and their number gradually increased till day 56. Behavioral analysis showed that the total distance and the number of getting up by hind legs decreased on day 14. The number of calcitonin gene-related peptide-positive fibers in the DRG increased and was the highest on day 14. CONCLUSIONS The subchondral bone condition under cartilage defects dynamically changes from bone resorption to sclerosis and is related to pain level.
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Affiliation(s)
- Yuichi Kato
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Tomoyuki Nakasa
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
- Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
| | - Junichi Sumii
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Munekazu Kanemitsu
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Masakazu Ishikawa
- Department of Artificial Joints and Biomaterials, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Shigeru Miyaki
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
- Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
| | - Nobuo Adachi
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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Morgan M, Thai J, Nazemian V, Song R, Ivanusic JJ. Changes to the activity and sensitivity of nerves innervating subchondral bone contribute to pain in late-stage osteoarthritis. Pain 2022; 163:390-402. [PMID: 34108432 PMCID: PMC8756348 DOI: 10.1097/j.pain.0000000000002355] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/20/2021] [Accepted: 05/07/2021] [Indexed: 11/30/2022]
Abstract
ABSTRACT Although it is clear that osteoarthritis (OA) pain involves activation and/or sensitization of nociceptors that innervate knee joint articular tissues, much less is known about the role of the innervation of surrounding bone. In this study, we used monoiodoacetate (MIA)-induced OA in male rats to test the idea that pain in OA is driven by differential contributions from nerves that innervate knee joint articular tissues vs the surrounding bone. The time-course of pain behavior was assayed using the advanced dynamic weight-bearing device, and histopathology was examined using haematoxylin and eosin histology. Extracellular electrophysiological recordings of knee joint and bone afferent neurons were made early (day 3) and late (day 28) in the pathogenesis of MIA-induced OA. We observed significant changes in the function of knee joint afferent neurons, but not bone afferent neurons, at day 3 when there was histological evidence of inflammation in the joint capsule, but no damage to the articular cartilage or subchondral bone. Changes in the function of bone afferent neurons were only observed at day 28, when there was histological evidence of damage to the articular cartilage and subchondral bone. Our findings suggest that pain early in MIA-induced OA involves activation and sensitization of nerves that innervate the joint capsule but not the underlying subchondral bone, and that pain in late MIA-induced OA involves the additional recruitment of nerves that innervate the subchondral bone. Thus, nerves that innervate bone should be considered important targets for development of mechanism-based therapies to treat pain in late OA.
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Affiliation(s)
- Michael Morgan
- Department of Anatomy and Physiology, University of Melbourne, Victoria, Australia
| | - Jenny Thai
- Department of Anatomy and Physiology, University of Melbourne, Victoria, Australia
| | - Vida Nazemian
- Department of Anatomy and Physiology, University of Melbourne, Victoria, Australia
| | - Richard Song
- Department of Anatomy and Physiology, University of Melbourne, Victoria, Australia
| | - Jason J. Ivanusic
- Department of Anatomy and Physiology, University of Melbourne, Victoria, Australia
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Xu J, Wang J, Chen X, Li Y, Mi J, Qin L. The Effects of Calcitonin Gene-Related Peptide on Bone Homeostasis and Regeneration. Curr Osteoporos Rep 2020; 18:621-632. [PMID: 33030684 DOI: 10.1007/s11914-020-00624-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/29/2020] [Indexed: 12/15/2022]
Abstract
PURPOSE OF REVIEW The goals of this review are two folds: (1) to describe the recent understandings on the roles of calcitonin gene-related peptide-α (CGRP) in bone homeostasis and the underlying mechanisms of related neuronal regulation and (2) to propose innovative CGRP-modulated approaches for enhancing bone regeneration in challenging bone disorders. RECENT FINDINGS CGRP is predominantly produced by the densely distributed sensory neuronal fibers in bone, declining with age. Under mechanical and biochemical stimulations, CGRP releases and exerts either physiological or pathophysiological roles. CGRP at physiological level orchestrates the communications of bone cells with cells of other lineages, affecting not only osteogenesis, osteoclastogenesis, and adipogenesis but also angiogenesis, demonstrating with pronounced anabolic effect, thus is essential for maintaining bone homeostasis, with tuned nerve-vessel-bone network. In addition, its effects on immunity and cell recruitment are also crucial for bone fracture healing. Binding to the G protein-coupled receptor composited by calcitonin receptor-like receptor (CRLR) and receptor activity modifying protein 1 (RAMP1) on cellular surface, CGRP triggers various intracellular signaling cascades involving cyclic adenosine monophosphate (cAMP) and cAMP response element-binding protein (CREB). Peaking at early stage post-fracture, CGRP promotes bone formation, displaying with larger callus. Then CGRP gradually decreases over time, allowing normal or physiological bone remodeling. By elevating CGRP at early stage, low-intensity pulsed ultrasound (LIPUS), electrical stimulation, and magnesium-based bio-mineral products may promisingly accelerate bone regeneration experimentally in medical conditions like osteoporosis, osteoporotic fracture, and spine fusion. Excess CGRP expression is commonly observed in pathological conditions including cancer metastatic lesions in bone and fracture delayed- or non-healing, resulting in persistent chronic pain. To date, these discoveries have largely been limited to animal models. Clinical applications are highly desirable. Compelling evidence show the anabolic effects of CGRP on bone in animals. However, further validation on the role of CGRP and the underlying mechanisms in human skeletons is required. It remains unclear if it is type H vessel connecting neuronal CGRP to osteogenesis, and if there is only specific rather than all osteoprogenitors responsible to CGRP. Clear priority should be put to eliminate these knowledge gaps by integrating with high-resolution 3D imaging of transparent bulk bone and single-cell RNA-sequencing. Last but not the least, given that small molecule antagonists such as BIBN4096BS can block the beneficial effects of CGRP on bone, concerns on the potential side effects of humanized CGRP-neutralizing antibodies when systemically administrated to treat migraine in clinics are arising.
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Affiliation(s)
- Jiankun Xu
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, China.
- Innovative Orthopaedic Biomaterial and Drug Translational Research Laboratory, Li Ka Shing Health and Science Institute, The Chinese University of Hong Kong, Hong Kong, China.
- Joint Laboratory of Chinese Academic of Science and Hong Kong for Biomaterials, The Chinese University of Hong Kong, Hong Kong, China.
| | - Jiali Wang
- School of Biomedical Engineering, Sun Yat-sen University, Guangzhou, China
| | - Xiaodan Chen
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | - Ye Li
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | - Jie Mi
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | - Ling Qin
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, China.
- Innovative Orthopaedic Biomaterial and Drug Translational Research Laboratory, Li Ka Shing Health and Science Institute, The Chinese University of Hong Kong, Hong Kong, China.
- Joint Laboratory of Chinese Academic of Science and Hong Kong for Biomaterials, The Chinese University of Hong Kong, Hong Kong, China.
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Wang J, Xu J, Hopkins C, Chow DH, Qin L. Biodegradable Magnesium-Based Implants in Orthopedics-A General Review and Perspectives. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1902443. [PMID: 32328412 PMCID: PMC7175270 DOI: 10.1002/advs.201902443] [Citation(s) in RCA: 177] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 01/06/2020] [Indexed: 05/10/2023]
Abstract
Biodegradable Mg-based metals may be promising orthopedic implants for treating challenging bone diseases, attributed to their desirable mechanical and osteopromotive properties. This Review summarizes the current status and future research trends for Mg-based orthopedic implants. First, the properties between Mg-based implants and traditional orthopedic implants are compared on the following aspects: in vitro and in vivo degradation mechanisms of Mg-based implants, peri-implant bone responses, the fate of the degradation products, and the cellular and molecular mechanisms underlying the beneficial effects of Mg ions on osteogenesis. Then, the preclinical studies conducted at the low weight bearing sites of animals are introduced. The innovative strategies (for example, via designing Mg-containing hybrid systems) are discussed to address the limitations of Mg-based metals prior to their clinical applications at weight-bearing sites. Finally, the available clinical studies are summarized and the challenges and perspectives of Mg-based orthopedic implants are discussed. Taken together, the progress made on the development of Mg-based implants in basic, translational, and clinical research has laid down a foundation for developing a new era in the treatment of challenging and prevalent bone diseases.
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Affiliation(s)
- Jia‐Li Wang
- School of Biomedical EngineeringSun Yat‐sen UniversityGuangzhou510006P. R. China
- Musculoskeletal Research LaboratoryDepartment of Orthopaedics & TraumatologyThe Chinese University of Hong KongHong Kong SARP. R. China
| | - Jian‐Kun Xu
- Musculoskeletal Research LaboratoryDepartment of Orthopaedics & TraumatologyThe Chinese University of Hong KongHong Kong SARP. R. China
- Innovative Orthopaedic Biomaterial and Drug Translational Research LaboratoryLi Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong SARP. R. China
| | - Chelsea Hopkins
- Musculoskeletal Research LaboratoryDepartment of Orthopaedics & TraumatologyThe Chinese University of Hong KongHong Kong SARP. R. China
| | - Dick Ho‐Kiu Chow
- Musculoskeletal Research LaboratoryDepartment of Orthopaedics & TraumatologyThe Chinese University of Hong KongHong Kong SARP. R. China
- Innovative Orthopaedic Biomaterial and Drug Translational Research LaboratoryLi Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong SARP. R. China
| | - Ling Qin
- Musculoskeletal Research LaboratoryDepartment of Orthopaedics & TraumatologyThe Chinese University of Hong KongHong Kong SARP. R. China
- Innovative Orthopaedic Biomaterial and Drug Translational Research LaboratoryLi Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong SARP. R. China
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Swier VJ, White KA, Meyerholz DK, Chefdeville A, Khanna R, Sieren JC, Quelle DE, Weimer JM. Validating indicators of CNS disorders in a swine model of neurological disease. PLoS One 2020; 15:e0228222. [PMID: 32074109 PMCID: PMC7029865 DOI: 10.1371/journal.pone.0228222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 01/09/2020] [Indexed: 11/18/2022] Open
Abstract
Genetically modified swine disease models are becoming increasingly important for studying molecular, physiological and pathological characteristics of human disorders. Given the limited history of these model systems, there remains a great need for proven molecular reagents in swine tissue. Here, to provide a resource for neurological models of disease, we validated antibodies by immunohistochemistry for use in examining central nervous system (CNS) markers in a recently developed miniswine model of neurofibromatosis type 1 (NF1). NF1 is an autosomal dominant tumor predisposition disorder stemming from mutations in NF1, a gene that encodes the Ras-GTPase activating protein neurofibromin. Patients classically present with benign neurofibromas throughout their bodies and can also present with neurological associated symptoms such as chronic pain, cognitive impairment, and behavioral abnormalities. As validated antibodies for immunohistochemistry applications are particularly difficult to find for swine models of neurological disease, we present immunostaining validation of antibodies implicated in glial inflammation (CD68), oligodendrocyte development (NG2, O4 and Olig2), and neuron differentiation and neurotransmission (doublecortin, GAD67, and tyrosine hydroxylase) by examining cellular localization and brain region specificity. Additionally, we confirm the utility of anti-GFAP, anti-Iba1, and anti-MBP antibodies, previously validated in swine, by testing their immunoreactivity across multiple brain regions in mutant NF1 samples. These immunostaining protocols for CNS markers provide a useful resource to the scientific community, furthering the utility of genetically modified miniswine for translational and clinical applications.
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Affiliation(s)
- Vicki J. Swier
- Pediatrics and Rare Diseases Group, Sanford Research, Sioux Falls, South Dakota, United States of America
| | - Katherine A. White
- Pediatrics and Rare Diseases Group, Sanford Research, Sioux Falls, South Dakota, United States of America
| | - David K. Meyerholz
- Department of Pathology, University of Iowa Carver College of Medicine, Iowa City, Iowa, United States of America
| | - Aude Chefdeville
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, Arizona, United States of America
| | - Rajesh Khanna
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, Arizona, United States of America
- Graduate Interdisciplinary Program in Neuroscience; College of Medicine, University of Arizona, Tucson, Arizona, United States of America
| | - Jessica C. Sieren
- Department of Radiology and Biomedical Engineering, University of Iowa, Iowa City, Iowa, United States of America
| | - Dawn E. Quelle
- Department of Pathology, University of Iowa Carver College of Medicine, Iowa City, Iowa, United States of America
- Department of Neuroscience and Pharmacology, University of Iowa, Iowa City, Iowa, United States of America
| | - Jill M. Weimer
- Pediatrics and Rare Diseases Group, Sanford Research, Sioux Falls, South Dakota, United States of America
- Department of Pediatrics, Sanford School of Medicine, University of South Dakota, Sioux Falls, South Dakota, United States of America
- * E-mail:
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Li Y, Wu F, Wei J, Lao L, Shen X. Laser Moxibustion Alleviates Knee Osteoarthritis Pain by Inhibiting Spinal Microglial Activation-Mediated Neuroinflammation in Rats. PHOTOBIOMODULATION PHOTOMEDICINE AND LASER SURGERY 2020; 38:237-243. [PMID: 31976816 DOI: 10.1089/photob.2019.4744] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Background: Central sensitization driven by glial activation-mediated neuroinflammation is recognized as a key mechanism in pain processing. Laser moxibustion using low-intensity laser irradiation of corresponding acupoints significantly relieves knee osteoarthritis (KOA) pain. However, the underlying mechanism of its effects on KOA pain is still not completely understood. Objective: In this study, we aimed to investigate whether laser moxibustion could alleviate KOA pain by inhibiting spinal glial activation and proinflammatory cytokines upregulation in monosodium iodoacetate (MIA)-induced KOA pain in rats. Materials and methods: Sprague-Dawley rats were divided randomly into three groups: Saline + Sham Laser, MIA + Laser, and MIA + Sham Laser. A 10.6 μm laser was used to irradiate ST35 (Dubi) for 10 min once every 2 days for a total of seven applications. The paw withdrawal mechanical threshold and weight-bearing distribution were performed to evaluate the nociceptive behaviors. Spinal expressions of microglial marker, ionized calcium binding adaptor molecule-1 (Iba-1); astrocyte marker, glial fibrillary acidic protein (GFAP); pro-inflammatory cytokines, tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), and interleukin-6 (IL-6) were measured 14 days after MIA injection. Results: The results showed that laser moxibustion significantly reversed the MIA-induced mechanical hyperalgesia and weight-bearing difference up to 14 days compared with MIA + Sham Laser group (p < 0.05 or p < 0.01). Moreover, both the protein level and immunofluorescence intensity of Iba-1 in the ipsilateral spinal cord dorsal horn were markedly decreased in the MIA + Laser group than those in the MIA + Sham Laser group (p < 0.01). However, there was no significant difference in the expression of GFAP between groups (p > 0.05). In addition, laser moxibustion decreased the upregulation of TNF-α, IL-1β, and IL-6 compared with the MIA + Sham Laser group (p < 0.01). Conclusions: This study demonstrated that laser moxibustion at ST35 significantly alleviated MIA-induced KOA pain through inhibition of the microglial activation-mediated neuroinflammation, at least partially, by suppressing the production of proinflammatory cytokines, which may provide a potential analgesic target for KOA pain relief.
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Affiliation(s)
- Yuan Li
- School of Acupuncture-Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Fan Wu
- School of Acupuncture-Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jianzi Wei
- School of Acupuncture-Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Lixing Lao
- School of Acupuncture-Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,School of Chinese Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Xueyong Shen
- School of Acupuncture-Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Shanghai Research Center of Acupuncture & Meridian, Shanghai, China
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11
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Tzschentke TM. Pharmacology of bisphosphonates in pain. Br J Pharmacol 2019; 178:1973-1994. [PMID: 31347149 DOI: 10.1111/bph.14799] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 07/11/2019] [Accepted: 07/19/2019] [Indexed: 01/15/2023] Open
Abstract
The treatment of pain, in particular, chronic pain, remains a clinical challenge. This is particularly true for pain associated with severe or rare conditions, such as bone cancer pain, vulvodynia, or complex regional pain syndrome. Over the recent years, there is an increasing interest in the potential of bisphosphonates in the treatment of pain, although there are few papers describing antinociceptive and anti-hypersensitizing effects of bisphosphonates in various animal models of pain. There is also increasing evidence for clinical efficacy of bisphosphonates in chronic pain states, although the number of well-controlled studies is still limited. However, the mechanisms underlying the analgesic effects of bisphosphonates are still largely elusive. This review provides an overview of preclinical and clinical studies of bisphosphonates in pain and discusses various pharmacological mechanisms that have been postulated to explain their analgesic effects. LINKED ARTICLES: This article is part of a themed issue on The molecular pharmacology of bone and cancer-related bone diseases. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v178.9/issuetoc.
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Abstract
Supplemental Digital Content is Available in the Text. Anxiety predicts onset of knee pain and drives greater osteoarthritis pain in humans. Our validated preclinical model identifies supraspinal astrocytosis as a potential mechanism. Anxiety and depression are associated with increased pain responses in chronic pain states. The extent to which anxiety drives chronic pain, or vice versa, remains an important question that has implications for analgesic treatment strategies. Here, the effect of existing anxiety on future osteoarthritis (OA) pain was investigated, and potential mechanisms were studied in an animal model. Pressure pain detection thresholds, anxiety, and depression were assessed in people with (n = 130) or without (n = 100) painful knee OA. Separately, knee pain and anxiety scores were also measured twice over 12 months in 4730 individuals recruited from the general population. A preclinical investigation of a model of OA pain in normo-anxiety Sprague-Dawley (SD) and high-anxiety Wistar Kyoto (WKY) rats assessed underlying neurobiological mechanisms. Higher anxiety, independently from depression, was associated with significantly lower pressure pain detection thresholds at sites local to (P < 0.01) and distant from (P < 0.05) the painful knee in patients with OA. Separately, high anxiety scores predicted increased risk of knee pain onset in 3274 originally pain-free people over the 1-year period (odds ratio = 1.71; 95% confidence interval = 1.25-2.34, P < 0.00083). Similarly, WKY rats developed significantly lower ipsilateral and contralateral hind paw withdrawal thresholds in the monosodium iodoacetate model of OA pain, compared with SD rats (P = 0.0005). Linear regressions revealed that baseline anxiety-like behaviour was predictive of lowered paw withdrawal thresholds in WKY rats, mirroring the human data. This augmented pain phenotype was significantly associated with increased glial fibrillary acidic protein immunofluorescence in pain-associated brain regions, identifying supraspinal astrocyte activation as a significant mechanism underlying anxiety-augmented pain behaviour.
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Chang CL, Hsu SYT. Development of chimeric and bifunctional antagonists for CLR/RAMP receptors. PLoS One 2019; 14:e0216996. [PMID: 31150417 PMCID: PMC6544337 DOI: 10.1371/journal.pone.0216996] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 05/02/2019] [Indexed: 11/26/2022] Open
Abstract
CGRP, adrenomedullin (ADM), and adrenomedullin 2 (ADM2) family peptides are
important neuropeptides and hormones for the regulation of neurotransmission,
vasotone, cardiovascular morphogenesis, vascular integrity, and feto‒placental
development. These peptides signal through CLR/RAMP1, 2 and 3 receptor
complexes. CLR/RAMP1, or CGRP receptor, antagonists have been developed for the
treatment of migraine headache and osteoarthritis pain; whereas CLR/RAMP2, or
ADM receptor, antagonists are being developed for the treatment of tumor
growth/metastasis. Based on the finding that an acylated chimeric ADM/ADM2
analog potently stimulates CLR/RAMP1 and 2 signaling, we hypothesized that the
binding domain of this analog could have potent inhibitory activity on CLR/RAMP
receptors. Consistent with this hypothesis, we showed that acylated truncated
ADM/ADM2 analogs of 27–31 residues exhibit potent antagonistic activity toward
CLR/RAMP1 and 2. On the other hand, nonacylated analogs have minimal activity.
Further truncation at the junctional region of these chimeric analogs led to the
generation of CLR/RAMP1-selective antagonists. A 17-amino-acid analog
(Antagonist 2–4) showed 100-fold selectivity for CLR/RAMP1 and was >100-fold
more potent than the classic CGRP receptor antagonist CGRP8-37. In addition, we
showed (1) a lysine residue in the Antagonist 2–4 is important for enhancing the
antagonistic activity, (2) an analog consisted of an ADM sequence motif and a
12-amino-acid binding domain of CGRP exhibits potent CLR/RAMP1-inhibitory
activity, and (3) a chimeric analog consisted of a somatostatin analog and an
ADM antagonist exhibits dual activities on somatostatin and CLR/RAMP receptors.
Because the blockage of CLR/RAMP signaling prevents migraine pain and suppresses
tumor growth/metastasis, further studies of these analogs, which presumably have
better access to the tumor microenvironment and nerve endings at the trigeminal
ganglion and synovial joints as compared to antibody-based therapies, may lead
to the development of better anti-CGRP therapy and alternative antiangiogenesis
therapy. Likewise, the use of bifunctional somatostatin-ADM antagonist analogs
could be a promising strategy for the treatment of high-grade neuroendocrine
tumors by targeting an antiangiogenesis agent to the neuroendocrine tumor
microenvironment.
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Affiliation(s)
- Chia Lin Chang
- Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital
Linkou Medical Center, Chang Gung University, Kweishan, Taoyuan,
Taiwan
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14
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[Expression of KCNA2 in the dorsal root ganglia of rats with osteoarthritis pain induced by monoiodoacetate]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2019; 39:579-585. [PMID: 31140423 PMCID: PMC6743928 DOI: 10.12122/j.issn.1673-4254.2019.05.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
OBJECTIVE To investigate the changes in the expression of voltage-gated potassium channel subunit KCNA2 in the dorsal root ganglion (DRG) neurons of rats with osteoarthritis (OA) pain induced by sodium monoiodoacetate and explore the mechanism. METHODS A total of 156 adult male Sprague-Dawley rats were randomly divided into blank control group, saline group and intra-articular monoiodoacetate injection-induced OA group. The paw withdrawal mechanical threshold (PWMT) was measured before and at 1, 2, 4, and 6 weeks after monoiodoacetate injection. At 4 weeks after the injection, the pathological changes in the knee joints were analyzed using HE staining and Safranin O-Fast Green staining, and the expression of activating transcription factor 3 (ATF-3) and inducible nitric oxide synthase (iNOS) in the DRG neurons were detected by immunofluorescence staining. The expression of Kcna2 mRNA in the DRG neurons was detected by RT-qPCR at 1, 2, 4 and 6 weeks after the injection. The expression of KCNA2 in the DRG was measured by Western blotting, and the methylation level of Kcna2 promoter region was measured by MSPCR at 4 weeks after the injection. RESULTS The PWMT of the rats in OA group was significantly decreased at 2, 4, and 6 weeks after the injection as compared with the baseline (P < 0.05 or P < 0.001) as well as the control group (P < 0.05 or P < 0.001). Four weeks after the intra-articular injection, fractures and defects on the surface of the articular cartilage, bone hyperplasia, and blurred tidal line were observed in the rats in OA group, but no obvious pathological changes were detected in the control or saline groups. Compared with those in the control group, the expressions of ATF-3 and iNOS were significantly increased (P < 0.01) at 4 weeks after injection; the expression of Kcna2 mRNA at 2, 4 and 6 weeks and the expression of KCNA2 protein at 4 weeks were all significantly decreased (P < 0.05 or P < 0.01), and the methylation level of Kcna2 gene was significantly increased at 4 weeks after the injection in OA group (P < 0.01). CONCLUSIONS The expression of KCNA2 is decreased in the DRG neurons of rats with OA pain likely as a result of enhanced methylation of Kcna2 promoter region.
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Abstract
CGRP has long been suspected as a mediator of arthritis pain, although evidence that CGRP directly mediates human musculoskeletal pain remains circumstantial. This chapter describes in depth the evidence surrounding CGRP's association with pain in musculoskeletal disorders and also summarises evidence for CGRP being a direct cause of pain in other conditions. CGRP-immunoreactive nerves are present in musculoskeletal tissues, and CGRP expression is altered in musculoskeletal pain. CGRP modulates musculoskeletal pain through actions both in the periphery and central nervous system. Human observational studies, research on animal arthritis models and the few reported randomised controlled trials in humans of treatments that target CGRP provide the context of CGRP as a possible pain biomarker or mediator in conditions other than migraine.
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Affiliation(s)
- David A Walsh
- Pain Centre Versus Arthritis, NIHR Nottingham Biomedical Research Centre and Division of ROD, University of Nottingham, Nottingham, UK.
- Rheumatology, Sherwood Forest Hospitals NHS Foundation Trust, Nottinghamshire, UK.
| | - Daniel F McWilliams
- Pain Centre Versus Arthritis, NIHR Nottingham Biomedical Research Centre and Division of ROD, University of Nottingham, Nottingham, UK
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Hoshino T, Tsuji K, Onuma H, Udo M, Ueki H, Akiyama M, Abula K, Katagiri H, Miyatake K, Watanabe T, Sekiya I, Koga H, Muneta T. Persistent synovial inflammation plays important roles in persistent pain development in the rat knee before cartilage degradation reaches the subchondral bone. BMC Musculoskelet Disord 2018; 19:291. [PMID: 30115046 PMCID: PMC6097215 DOI: 10.1186/s12891-018-2221-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 08/03/2018] [Indexed: 11/18/2022] Open
Abstract
Background The major complaint of knee osteoarthritis (OA) is persistent pain. Unlike acute inflammatory pain, persistent pain is usually difficult to manage since its pathology is not fully understood. To elucidate the underlying mechanisms of persistent pain, we established 2 different inflammation-induced arthritis models by injecting monoiodo-acetic acid (MIA) into the joint cavity and performed integrated analyses of the structural changes in the synovial tissue and articular cartilage, sensory neuron rearrangement, and pain avoidance behavior in a rat arthritis model. Methods Male Wistar rats received intra-articular injections of MIA (0.2 mg/30 μL, low-dose group; 1 mg/30 μL, high-dose group) in the right knee and phosphate buffered saline (PBS; 30 μL, control group) in the left knee. Fluorogold (FG), a retrograde neural tracer, was used to label the nerve fibers for the identification of sensory neurons that dominate the joints in the dorsal root ganglion (DRG). Both knees were subjected to the intra-articular injection of 2% FG in PBS (5 μL) under anesthesia 5–7 days prior to sacrifice. We performed pain avoidance behavior tests (incapacitance and von Frey tests) at 0, 1, 3, 5, 7, 14, 21, and 28 days. At 5, 14, and 28 days, the rats were sacrificed and the knee joint and DRG were excised for histological assessment. The knee joints were stained with hematoxylin and eosin, safranin O, and calcitonin gene-related peptide (CGRP). The DRG were immunostained with CGRP. Results A transient inflammatory response followed by mild articular cartilage degeneration was observed in the low-dose MIA model versus persistent inflammation with structural changes in the synovial tissue (fibrosis) in the high-dose model. In the high-dose model, full-thickness cartilage degeneration was observed within 2 weeks post-MIA injection. The pain avoidance behavior tests indicated that persistent synovial inflammation and structural changes of the infrapatellar fat pad may play important roles in persistent knee joint pain before the articular cartilage degeneration reaches the subchondral bone. Conclusions Transient inflammation without structural changes of the synovial tissues did not induce persistent pain in the rat knee joint before degradation of the articular cartilage reached the subchondral bone plate. Electronic supplementary material The online version of this article (10.1186/s12891-018-2221-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Takashi Hoshino
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kunikazu Tsuji
- Department of Cartilage Regeneration, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.
| | - Hiroaki Onuma
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Mio Udo
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hiroko Ueki
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Masako Akiyama
- Research Administration Unit, Tokyo Medical and Dental university, Tokyo, Japan
| | - Kahaer Abula
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hiroki Katagiri
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kazumasa Miyatake
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Toshihumi Watanabe
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Ichiro Sekiya
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hideyuki Koga
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takeshi Muneta
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
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17
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Adães S, Almeida L, Potes CS, Ferreira AR, Castro-Lopes JM, Ferreira-Gomes J, Neto FL. Glial activation in the collagenase model of nociception associated with osteoarthritis. Mol Pain 2017; 13:1744806916688219. [PMID: 28326927 PMCID: PMC5302176 DOI: 10.1177/1744806916688219] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Background Experimental osteoarthritis entails neuropathic-like changes in dorsal root ganglia (DRG) neurons. Since glial activation has emerged as a key player in nociception, being reported in numerous models of neuropathic pain, we aimed at evaluating if glial cell activation may also occur in the DRG and spinal cord of rats with osteoarthritis induced by intra-articular injection of collagenase. Methods Osteoarthritis was induced by two injections, separated by three days, of 500 U of type II collagenase into the knee joint of rats. Movement-induced nociception was evaluated by the Knee-Bend and CatWalk tests during the following six weeks. Glial fibrillary acidic protein (GFAP) expression in satellite glial cells of the DRG was assessed by immunofluorescence and Western Blot analysis; the pattern of GFAP and activating transcription factor-3 (ATF-3) expression was also compared through double immunofluorescence analysis. GFAP expression in astrocytes and IBA-1 expression in microglia of the L3–L5 spinal cord segments was assessed by immunohistochemistry and Western Blot analysis. The effect of the intrathecal administration of fluorocitrate, an inhibitor of glial activation, on movement-induced nociception was evaluated six weeks after the first collagenase injection. Results GFAP expression in satellite glial cells of collagenase-injected animals was significantly increased six weeks after osteoarthritis induction. Double immunofluorescence showed GFAP upregulation in satellite glial cells surrounding ATF-3-positive neurons. In the spinal cord of collagenase-injected animals, an ipsilateral upregulation of GFAP and IBA-1 was also observed. The inhibition of glial activation with fluorocitrate decreased movement- and loading-induced nociception. Conclusion Collagenase-induced knee osteoarthritis leads to the development of nociception associated with movement of the affected joint and to the activation of glial cells in both the DRG and the spinal cord. Inhibition of glial cell activation by fluorocitrate decreases these osteoarthritis-associated nociceptive behaviours. These results suggest that glial cell activation may play a role in the development of chronic pain in this experimental model of osteoarthritis.
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Affiliation(s)
- Sara Adães
- 1 Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,2 Morphysiology of the Somatosensory System Group, Instituto de Biologia Molecular e Celular, Porto, Portugal.,3 Departamento de Biologia Experimental, Faculdade de Medicina da Universidade do Porto, Porto, Portugal
| | - Lígia Almeida
- 1 Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,2 Morphysiology of the Somatosensory System Group, Instituto de Biologia Molecular e Celular, Porto, Portugal.,3 Departamento de Biologia Experimental, Faculdade de Medicina da Universidade do Porto, Porto, Portugal
| | - Catarina S Potes
- 1 Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,2 Morphysiology of the Somatosensory System Group, Instituto de Biologia Molecular e Celular, Porto, Portugal.,3 Departamento de Biologia Experimental, Faculdade de Medicina da Universidade do Porto, Porto, Portugal
| | - Ana Rita Ferreira
- 1 Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| | - José M Castro-Lopes
- 1 Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,2 Morphysiology of the Somatosensory System Group, Instituto de Biologia Molecular e Celular, Porto, Portugal.,3 Departamento de Biologia Experimental, Faculdade de Medicina da Universidade do Porto, Porto, Portugal
| | - Joana Ferreira-Gomes
- 1 Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,2 Morphysiology of the Somatosensory System Group, Instituto de Biologia Molecular e Celular, Porto, Portugal.,3 Departamento de Biologia Experimental, Faculdade de Medicina da Universidade do Porto, Porto, Portugal
| | - Fani L Neto
- 1 Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,2 Morphysiology of the Somatosensory System Group, Instituto de Biologia Molecular e Celular, Porto, Portugal.,3 Departamento de Biologia Experimental, Faculdade de Medicina da Universidade do Porto, Porto, Portugal
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Cormier J, Cone K, Lanpher J, Kinens A, Henderson T, Liaw L, Bilsky EJ, King T, Rosen CJ, Stevenson GW. Exercise reverses pain-related weight asymmetry and differentially modulates trabecular bone microarchitecture in a rat model of osteoarthritis. Life Sci 2017; 180:51-59. [PMID: 28504116 PMCID: PMC5549619 DOI: 10.1016/j.lfs.2017.05.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 05/08/2017] [Accepted: 05/09/2017] [Indexed: 11/21/2022]
Abstract
There is great interest in developing and utilizing non-pharmacological/non-invasive forms of therapy for osteoarthritis (OA) pain including exercise and other physical fitness regimens. AIMS The present experiments determined the effects of prior wheel running on OA-induced weight asymmetry and trabecular bone microarchitecture. MAIN METHODS Wheel running included 7 or 21days of prior voluntary access to wheels followed by OA induction, followed by 21days post-OA access to wheels. OA was induced with monosodium iodoacetate (MIA), and weight asymmetry was measured using a hind limb weight bearing apparatus. Bone microarchitecture was characterized using ex vivo μCT. KEY FINDINGS Relative to saline controls, MIA (3.2mg/25μl) produced significant weight asymmetry measured on post-days (PDs) 3, 7, 14, 21 in sedentary rats. Seven days of prior running failed to alter MIA-induced weight asymmetry. In contrast, 21days of prior running resulted in complete reversal of MIA-induced weight asymmetry on all days tested. As a comparator, the opioid agonist morphine (3.2-10mg/kg) dose-dependently reversed weight asymmetry on PDs 3, 7, 14, but was ineffective in later-stage (PD 21) OA. In runners, Cohen's d (effect sizes) for OA vs. controls indicated large increases in bone volume fraction, trabecular number, trabecular thickness, and connective density in lateral compartment, and large decreases in the same parameters in medial compartment. In contrast, effect sizes were small to moderate for sedentary OA vs. CONTROLS SIGNIFICANCE Results indicate that voluntary exercise may protect against OA pain, the effect varies as a function of prior exercise duration, and is associated with distinct trabecular bone modifications.
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Affiliation(s)
- Jim Cormier
- Department of Psychology, University of New England, Biddeford, ME 04005, United States; Department of Biomedical Sciences, University of New England College of Osteopathic Medicine, Biddeford, ME 04005, United States
| | - Katherine Cone
- Department of Psychology, University of New England, Biddeford, ME 04005, United States
| | - Janell Lanpher
- Department of Psychology, University of New England, Biddeford, ME 04005, United States
| | - Abigail Kinens
- Department of Psychology, University of New England, Biddeford, ME 04005, United States
| | - Terry Henderson
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME 04074, United States
| | - Lucy Liaw
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME 04074, United States
| | - Edward J Bilsky
- Department of Biomedical Sciences, University of New England College of Osteopathic Medicine, Biddeford, ME 04005, United States; Center for Excellence in the Neurosciences, University of New England, United States; Department of Biomedical Sciences COM, Pacific Northwest University of Health Sciences, Yakima, WA 98901, United States
| | - Tamara King
- Department of Biomedical Sciences, University of New England College of Osteopathic Medicine, Biddeford, ME 04005, United States; Center for Excellence in the Neurosciences, University of New England, United States
| | - Clifford J Rosen
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME 04074, United States; Center for Clinical and Translational Research, Maine Medical Center Research Institute, Scarborough, ME 04074, United States
| | - Glenn W Stevenson
- Department of Psychology, University of New England, Biddeford, ME 04005, United States; Center for Excellence in the Neurosciences, University of New England, United States.
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Lin Y, Liu L, Jiang H, Zhou J, Tang Y. Inhibition of interleukin-6 function attenuates the central sensitization and pain behavior induced by osteoarthritis. Eur J Pharmacol 2017; 811:260-267. [PMID: 28663035 DOI: 10.1016/j.ejphar.2017.06.032] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 06/22/2017] [Accepted: 06/26/2017] [Indexed: 02/06/2023]
Abstract
Chronic pain is the most prominent and disabling symptom in the patients with osteoarthritis (OA), and the underlying mechanism largely remains unclear. Interleukin-6 (IL-6), a proinflammatory cytokine, is critically involved in the development and maintenance of central sensitization in several rodent models of chronic pain. The present study aims to elucidate the IL-6 mediated neurological adaptation in dorsal horn in the rat with monosodium iodoacetate (MIA) - induced OA. Significant upregulation of IL-6 expression was detected in the dorsal horn in the modeled rats. Blockade of IL-6 function by tocilizumab markedly suppressed the activation of astrocytes and microglia in the ipsilateral dorsal horn, reduced c-Fos immunoreactivity in dorsal horn neurons, and attenuated the upregulation of glutamate receptor subunits GluR1 and NR2B in dorsal horn in the rats with MIA-induced OA. It was further reported that administration of tocilizumab significantly improved the performance in weight-bearing test and mitigated the mechanical allodynia in the modeled rats. These data illustrated spinal IL-6 mediated mechanism underlying the chronic pain, and proposed the potential therapeutic effect of tocilizumab on the chronic pain in the setting of OA.
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Affiliation(s)
- Yuangui Lin
- Department of Anesthesiology, West China Second Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Disease of Women and Children(Sichuan University), Ministry of Education, Chengdu, China
| | - Lian Liu
- Division of Pulmonary Diseases, State Key Laboratory of Biotherapy of China, Sichuan University, Chengdu, Sichuan, China
| | - Haixia Jiang
- Department of Anesthesiology, The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China; Department of Anesthesiology and Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Jieshu Zhou
- Department of Anesthesiology, West China Second Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Disease of Women and Children(Sichuan University), Ministry of Education, Chengdu, China
| | - Yuying Tang
- Department of Anesthesiology, West China Second Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Disease of Women and Children(Sichuan University), Ministry of Education, Chengdu, China.
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Hummel M, Whiteside GT. Measuring and realizing the translational significance of preclinical in vivo studies of painful osteoarthritis. Osteoarthritis Cartilage 2017; 25:376-384. [PMID: 27592040 DOI: 10.1016/j.joca.2016.08.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 08/15/2016] [Accepted: 08/17/2016] [Indexed: 02/02/2023]
Abstract
In this communication, we discuss some key issues surrounding the translation of preclinical efficacy studies in models of painful osteoarthritis (OA) to the clinical arena. We highlight potential pitfalls which could negatively impact successful translation. These include lack of alignment between a model + endpoint and the intended clinical population, employing testing strategies in animals that are not appropriate for the targeted human population such as pre-emptive treatment and lastly, underestimating the magnitude of the efficacy signal in animals that may be needed to see an effect in the clinical population. Through careful analysis, we highlight the importance of each pitfall by providing relevant examples that will hopefully improve future chances of optimizing translation in the area of OA pain research. We advocate advancing publications directed at comparing methods, outcomes and conclusions between preclinical and clinical studies, regardless of whether the findings are positive or negative, are important for improving the potential for a desired successful translation from the bench to bedside.
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Affiliation(s)
- M Hummel
- Discovery Research, Purdue Pharma L.P., 6 Cedar Brook Drive, Cranbury, NJ 08512, USA
| | - G T Whiteside
- Discovery Research, Purdue Pharma L.P., 6 Cedar Brook Drive, Cranbury, NJ 08512, USA.
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21
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Burston JJ, Mapp PI, Sarmad S, Barrett DA, Niphakis MJ, Cravatt BF, Walsh DA, Chapman V. Robust anti-nociceptive effects of monoacylglycerol lipase inhibition in a model of osteoarthritis pain. Br J Pharmacol 2016; 173:3134-3144. [PMID: 27501482 PMCID: PMC5056226 DOI: 10.1111/bph.13574] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 07/19/2016] [Accepted: 07/22/2016] [Indexed: 01/18/2023] Open
Abstract
Background and Purpose Chronic pain is often a symptom of knee osteoarthritis (OA) for which current analgesics are either inadequate or are associated with serious side effects. The endocannabinoid system may offer alternative targets for pain relief. We evaluated the effects of a potent and selective monoacylglycerol (MAG) lipase inhibitor (MJN110) on OA pain behaviour, spinal mechanisms of action and joint histopathology in the rat. Experimental Approach Intra‐articular injection of monosodium iodoacetate (MIA) models OA pain and mimics clinical joint pathology. Effects of MJN110 on MIA‐induced weight‐bearing asymmetry and lowered paw withdrawal thresholds (PWTs), changes in spinal gene expression and brain levels of relevant lipids were determined. Key Results Acute MJN110 (5 mg·kg−1) significantly reversed MIA‐induced weight‐bearing asymmetry (MIA/vehicle: 68 ± 6 g; MIA/MJN110: 35 ± 4 g) and lowered ipsilateral PWTs (MIA/vehicle: 7 ± 0.8 g; MIA/MJN110: 11 ± 0.6 g), via both CB1 and CB2 receptors. Repeated treatment with MJN110 (5 mg·kg−1) resulted in anti‐nociceptive tolerance. A lower dose of MJN110 (1 mg·kg−1) acutely inhibited pain behaviour, which was maintained for 1 week of repeated administration but had no effect on joint histology. MJN110 significantly inhibited expression of membrane‐associated PGE synthase‐1 in the ipsilateral dorsal horn of the spinal cord of MIA rats, compared with vehicle‐treated MIA rats. Both doses of MJN110 significantly elevated brain levels of the endocannabinoid 2‐arachidonoylglycerol. Conclusions and Implications Our data support further assessment of the therapeutic potential of MAG lipase inhibitors for the treatment of OA pain.
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Affiliation(s)
- James J Burston
- Arthritis Research UK Pain Centre, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, UK. .,School of Life Sciences, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, UK.
| | - Paul I Mapp
- Arthritis Research UK Pain Centre, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, UK
| | - Sarir Sarmad
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - David A Barrett
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Micah J Niphakis
- The Skaggs Institute for Chemical Biology and Department of Chemical Physiology, The Scripps Research Institute, La Jolla, CA, USA.,Committee of Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - Benjamin F Cravatt
- The Skaggs Institute for Chemical Biology and Department of Chemical Physiology, The Scripps Research Institute, La Jolla, CA, USA.,Committee of Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - David A Walsh
- Arthritis Research UK Pain Centre, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, UK
| | - Victoria Chapman
- Arthritis Research UK Pain Centre, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, UK. .,School of Life Sciences, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, UK.
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22
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Udo M, Muneta T, Tsuji K, Ozeki N, Nakagawa Y, Ohara T, Saito R, Yanagisawa K, Koga H, Sekiya I. Monoiodoacetic acid induces arthritis and synovitis in rats in a dose- and time-dependent manner: proposed model-specific scoring systems. Osteoarthritis Cartilage 2016; 24:1284-91. [PMID: 26915639 DOI: 10.1016/j.joca.2016.02.005] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Revised: 02/06/2016] [Accepted: 02/12/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVE In a rat monoiodoacetic acid (MIA)-induced arthritis model, the amount of MIA commonly used was too high, resulting in rapid bone destruction. We examined the effect of MIA concentrations on articular cartilage and infrapatellar fat pad (IFP). We also established an original system for "macroscopic cartilage and bone score" and "IFP inflammation score" specific to the rat MIA-induced arthritis model. DESIGN Male Wistar rats received a single intra-articular injection of MIA in the knee. The amount of MIA was 0.1, 0.2, 0.5, and 1 mg respectively. Articular cartilage was evaluated at 2-12 weeks. IFP was also observed at 3-14 days. RESULTS Macroscopically, low MIA doses induced punctate depressions on the cartilage surface, and cartilage erosion proceeded slowly over 12 weeks, while higher MIA doses already induced cartilage erosion at 2 weeks, followed by bone destruction. MIA macroscopic cartilage and bone score, OARSI histological score, and Mankin score increased in a dose- and time-dependent manner. The IFP inflammation score peaked at 5 days in low dose groups, then decreased, while in high dose groups, the IFP score continued to increase over 14 days due to IFP fibrosis. CONCLUSIONS Punctate depressions, cartilage erosion, and bone destruction were observed in the MIA-induced arthritis model. The macroscopic cartilage and bone scoring enabled the quantification of cartilage degeneration and demonstrated that MIA-induced arthritis progressed in a dose- and time-dependent manner. IFP inflammation scores revealed that 0.2 mg MIA induced reversible synovitis, while 1 mg MIA induced fibrosis of the IFP body.
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Affiliation(s)
- M Udo
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
| | - T Muneta
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
| | - K Tsuji
- Department of Cartilage Regeneration, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
| | - N Ozeki
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Y Nakagawa
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
| | - T Ohara
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
| | - R Saito
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
| | - K Yanagisawa
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
| | - H Koga
- Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
| | - I Sekiya
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
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23
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Asian Elm tree inner bark prevents articular cartilage deterioration in ovariectomized obese rats with monoiodoacetate-induced osteoarthritis. Menopause 2016; 23:197-208. [DOI: 10.1097/gme.0000000000000521] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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24
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Abdelaziz DM, Abdullah S, Magnussen C, Ribeiro-da-Silva A, Komarova SV, Rauch F, Stone LS. Behavioral signs of pain and functional impairment in a mouse model of osteogenesis imperfecta. Bone 2015; 81:400-406. [PMID: 26277094 DOI: 10.1016/j.bone.2015.08.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 07/29/2015] [Accepted: 08/03/2015] [Indexed: 01/19/2023]
Abstract
Osteogenesis imperfecta (OI) is a congenital disorder caused most often by dominant mutations in the COL1A1 or COL1A2 genes that encode the alpha chains of type I collagen. Severe forms of OI are associated with skeletal deformities and frequent fractures. Skeletal pain can occur acutely after fracture, but also arises chronically without preceding fractures. In this study we assessed OI-associated pain in the Col1a1Jrt/+ mouse, a recently developed model of severe dominant OI. Similar to severe OI in humans, this mouse has significant skeletal abnormalities and develops spontaneous fractures, joint dislocations and vertebral deformities. In this model, we investigated behavioral measures of pain and functional impairment. Significant hypersensitivity to mechanical, heat and cold stimuli, assessed by von Frey filaments, radiant heat paw withdrawal and the acetone tests, respectively, were observed in OI compared to control wildtype littermates. OI mice also displayed reduced motor activity in the running wheel and open field assays. Immunocytochemical analysis revealed no changes between OI and WT mice in innervation of the glabrous skin of the hindpaw or in expression of the pain-related neuropeptide calcitonin gene-related protein in sensory neurons. In contrast, increased sensitivity to mechanical and cold stimulation strongly correlated with the extent of skeletal deformities in OI mice. Thus, we demonstrated that the Col1a1Jrt/+ mouse model of severe OI has hypersensitivity to mechanical and thermal stimuli, consistent with a state of chronic pain.
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Affiliation(s)
- Dareen M Abdelaziz
- Faculty of Dentistry, McGill University, Montreal, QC, Canada; Alan Edwards Centre for Research on Pain, McGill University, Montreal, QC, Canada
| | - Sami Abdullah
- Shriners Hospitals for Children-Canada and McGill University, Montreal, QC, Canada
| | - Claire Magnussen
- Alan Edwards Centre for Research on Pain, McGill University, Montreal, QC, Canada; Department of Pharmacology & Therapeutics, Faculty of Medicine, McGill University, Montreal, QC, Canada; Integrated Program in Neuroscience, McGill University, Montreal, QC, Canada
| | - Alfredo Ribeiro-da-Silva
- Alan Edwards Centre for Research on Pain, McGill University, Montreal, QC, Canada; Department of Pharmacology & Therapeutics, Faculty of Medicine, McGill University, Montreal, QC, Canada; Integrated Program in Neuroscience, McGill University, Montreal, QC, Canada; Department of Anatomy and Cell Biology, McGill University, Montreal, QC, Canada
| | - Svetlana V Komarova
- Faculty of Dentistry, McGill University, Montreal, QC, Canada; Shriners Hospitals for Children-Canada and McGill University, Montreal, QC, Canada
| | - Frank Rauch
- Shriners Hospitals for Children-Canada and McGill University, Montreal, QC, Canada
| | - Laura S Stone
- Faculty of Dentistry, McGill University, Montreal, QC, Canada; Alan Edwards Centre for Research on Pain, McGill University, Montreal, QC, Canada; Department of Pharmacology & Therapeutics, Faculty of Medicine, McGill University, Montreal, QC, Canada; Integrated Program in Neuroscience, McGill University, Montreal, QC, Canada; Department of Anaesthesiology, Faculty of Medicine, McGill University, Montreal, QC, Canada.
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25
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Kras JV, Kartha S, Winkelstein BA. Intra-articular nerve growth factor regulates development, but not maintenance, of injury-induced facet joint pain & spinal neuronal hypersensitivity. Osteoarthritis Cartilage 2015; 23:1999-2008. [PMID: 26521746 PMCID: PMC4630778 DOI: 10.1016/j.joca.2015.06.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 06/06/2015] [Accepted: 06/15/2015] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The objective of the current study is to define whether intra-articular nerve growth factor (NGF), an inflammatory mediator that contributes to osteoarthritic pain, is necessary and sufficient for the development or maintenance of injury-induced facet joint pain and its concomitant spinal neuronal hyperexcitability. METHOD Male Holtzman rats underwent painful cervical facet joint distraction (FJD) or sham procedures. Mechanical hyperalgesia was assessed in the forepaws, and NGF expression was quantified in the C6/C7 facet joint. An anti-NGF antibody was administered intra-articularly in additional rats immediately or 1 day following facet distraction or sham procedures to block intra-articular NGF and test its contribution to initiation and/or maintenance of facet joint pain and spinal neuronal hyperexcitability. NGF was injected into the bilateral C6/C7 facet joints in separate rats to determine if NGF alone is sufficient to induce these behavioral and neuronal responses. RESULTS NGF expression increases in the cervical facet joint in association with behavioral sensitivity after that joint's mechanical injury. Intra-articular application of anti-NGF immediately after a joint distraction prevents the development of both injury-induced pain and hyperexcitability of spinal neurons. Yet, intra-articular anti-NGF applied after pain has developed does not attenuate either behavioral or neuronal hyperexcitability. Intra-articular NGF administered to the facet in naïve rats also induces behavioral hypersensitivity and spinal neuronal hyperexcitability. CONCLUSION Findings demonstrate that NGF in the facet joint contributes to the development of injury-induced joint pain. Localized blocking of NGF signaling in the joint may provide potential treatment for joint pain.
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Affiliation(s)
- Jeffrey V. Kras
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104
| | - Sonia Kartha
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104
| | - Beth A. Winkelstein
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104,Department of Neurosurgery, University of Pennsylvania, Philadelphia, PA 19104
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26
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Lau YC, Lai YM, Po KT, Qian X, Hao HW, Zhao HC, Li LM, Guo X. Dorsal root ganglion electrical stimulation promoted intertransverse process spinal fusion without decortications and bone grafting: a proof-of-concept study. Spine J 2014; 14:2472-8. [PMID: 24735748 DOI: 10.1016/j.spinee.2014.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 03/25/2014] [Accepted: 04/05/2014] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Periosteum, endosteum, and bone are innervated by sensory nerves expressing calcitonin gene-related peptide (CGRP), which is a known osteoanabolic peptide and plays an important role in fracture healing and spinal fusion. Synthesis and release of CGRP are found in sensory neurons located in the dorsal root ganglions (DRGs) and can be upregulated by electrical stimulation (ES) at DRG. PURPOSE To prove our study hypothesis on the potential of precise ES at DRG through implantable microelectrical stimulation system (IMESS) for its effect on promoting spinal fusion in a rat model without decortications and bone grafting. STUDY DESIGN An experimental animal study. METHODS A novel IMESS was developed for stimulating L4-L6 DRG in rats. Sixteen rats were used and divided equally into the control group without ES and the ES group, with a daily 20 minutes ES to DRG for 6 weeks. At the end of 6 weeks, radiography and microcomputed tomography were conducted to evaluate new bone formation and spinal fusion. Bilateral L4-L6 DRGs were harvested for immunohistochemistry and quantification of neurons with upregulated CGRP expression. RESULTS In the ES group, rate of radiographic fusion with complete and uninterrupted bony bridging was 100% (8/8) at the right L4/L5 transverse processes and 75% (6/8) at the right L5/L6 transverse processes. Bony callus formation was absent at the left L4-L6 transverse processes in the ES group and in bilateral L4-L6 transverse processes in the control group. CONCLUSIONS We proved for the first time that precise ES at DRG through IMESS effectively promoted intertransverse process fusion in rat model without decortications and bone grafting. Electrical stimulation at DRG might be an attractive minimal invasive bioengineering approach and an alternative therapy for intertransverse process fusion that is increasingly being used for the treatment of degenerative spine disorders.
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Affiliation(s)
- Yuen-Chi Lau
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong
| | - Yau-Ming Lai
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong
| | - Kai-Ting Po
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong
| | - Xing Qian
- School of Aerospace, Tsinghua University, China
| | | | | | - Lu-Ming Li
- School of Aerospace, Tsinghua University, China
| | - Xia Guo
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong.
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27
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Morado-Urbina CE, Alvarado-Vázquez PA, Montiel-Ruiz RM, Acosta-González RI, Castañeda-Corral G, Jiménez-Andrade JM. Early, Middle, or Late Administration of Zoledronate Alleviates Spontaneous Nociceptive Behavior and Restores Functional Outcomes in a Mouse Model of CFA-Induced Arthritis. Drug Dev Res 2014; 75:438-48. [DOI: 10.1002/ddr.21183] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 06/06/2014] [Indexed: 12/11/2022]
Affiliation(s)
- Carlos Eduardo Morado-Urbina
- Unidad Académica Multidisciplinaria Reynosa Aztlán; Universidad Autónoma de Tamaulipas; Reynosa Tamaulipas México
| | | | - Rosa Mariana Montiel-Ruiz
- Unidad Académica Multidisciplinaria Reynosa Aztlán; Universidad Autónoma de Tamaulipas; Reynosa Tamaulipas México
| | - Rosa Issel Acosta-González
- Unidad Académica Multidisciplinaria Reynosa Aztlán; Universidad Autónoma de Tamaulipas; Reynosa Tamaulipas México
| | | | - Juan Miguel Jiménez-Andrade
- Unidad Académica Multidisciplinaria Reynosa Aztlán; Universidad Autónoma de Tamaulipas; Reynosa Tamaulipas México
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