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The expression of Netrin-1 in the MIA-induced osteoarthritic temporomandibular joint in mice. Sci Rep 2021; 11:15695. [PMID: 34344989 PMCID: PMC8333414 DOI: 10.1038/s41598-021-95251-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 07/14/2021] [Indexed: 11/09/2022] Open
Abstract
Subchondral bone degeneration is the main pathological change during temporomandibular joint (TMJ) osteoarthritis (OA) development. Netrin-1, an axon-guiding factor, might play roles in OA development and pain. The purpose of this study was to investigate the expression of Netrin-1 in TMJ OA and its possible role in the progression of TMJ OA and pain. The synovial fluids of temporomandibular joint disorders (TMDs) patients were collected for Netrin-1 by enzyme linked immunosorbent assay (ELISA). TMJ OA model was built by MIA joint injection, and then the von Frey test, hematoxylin & eosin (H&E) staining, toluidine blue (TB) staining, immunohistochemical (IHC) staining and micro-CT were performed. After induction of osteoclast differentiation of raw264.7 cells, immunofluorescence (IF) was used to detect the Netrin-1 and its receptors on osteoclast membrane. The concentration of Netrin-1 increased in the synovial fluid of TMJ OA patients. After MIA injection to TMJ, the head withdrawal threshold (HWT) was significantly decreased. Microscopically, the structural disorder of subchondral bone was the most obvious at the 2nd week after MIA injection. In addition, Netrin-1 expression increased in the subchondral bone at the 2nd week after MIA injection. In vitro, the expressions of Netrin-1 and its receptor Unc5B were upregulated on the osteoclast membrane. Netrin-1 might be an important regulator during bone degeneration and pain in the process of TMJ OA.
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Xiao M, Hu ZH, Jiang HH, Fang W, Long X. Role of osteoclast differentiation in the occurrence of osteoarthritis of temporomandibular joint. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2021; 39:398-404. [PMID: 34409794 DOI: 10.7518/hxkq.2021.04.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
OBJECTIVES This study aimed to explore the role of osteoclast differentiation in the occurrence of temporomandibular joint osteoarthritis (TMJOA). METHODS A mouse TMJOA model was constructed. Micro-CT was used to observe the changes in condylar bone during the development of TMJOA. Hematoxylin-eosin (HE) staining was used to observe the histological structure changes of the condyle of TMJOA mice. Tartrate resistant acid phosphatase (TRAP) staining was used to observe the presence of osteoclasts in TMJOA joint tissue. The synovial fluid of patients with TMJ-OA was collected to determine the effect on osteoclast differentiation. RESULTS Micro-CT revealed that the condyle of the TMJOA group had the most obvious damage in the second and third weeks, and the shape of the condyles also changed in a beak-like manner. HE staining showed that the condyle cartilage and subchondral bone structure of TMJOA mice were disordered in the second week. TRAP tissue staining showed that the number of osteoclasts of the TMJOA group obviously increased in the second week. Results of cell experiments showed that the number of osteoclast differentiation significantly increased after stimulation of synovial fluid from TMJOA patients, and the cell volume increased. CONCLUSIONS TMJOA animal models and TMJOA patient synovial cell experiments could induce osteoclast differentiation, indicating that osteoclast differentiation plays an important role in TMJOA occurrence.
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Affiliation(s)
- Mian Xiao
- Dept. of Oral and Maxillofacial Trauma and Temporomandibular Joint Surgery, School and Hospital of Stomatology, Wuhan University, State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan 430000, China
| | - Zhi-Hui Hu
- Dept. of Oral and Maxillofacial Trauma and Temporomandibular Joint Surgery, School and Hospital of Stomatology, Wuhan University, State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan 430000, China
| | - Heng-Hua Jiang
- Dept. of Oral and Maxillofacial Trauma and Temporomandibular Joint Surgery, School and Hospital of Stomatology, Wuhan University, State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan 430000, China
| | - Wei Fang
- Dept. of Oral and Maxillofacial Trauma and Temporomandibular Joint Surgery, School and Hospital of Stomatology, Wuhan University, State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan 430000, China
| | - Xing Long
- Dept. of Oral and Maxillofacial Trauma and Temporomandibular Joint Surgery, School and Hospital of Stomatology, Wuhan University, State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan 430000, China
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Yi Y, Zhou X, Xiong X, Wang J. Neuroimmune interactions in painful TMD: Mechanisms and treatment implications. J Leukoc Biol 2021; 110:553-563. [PMID: 34322892 DOI: 10.1002/jlb.3mr0621-731rr] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 06/28/2021] [Accepted: 07/08/2021] [Indexed: 02/05/2023] Open
Abstract
The underlying mechanisms and treatment of painful temporomandibular disorders (TMDs) are important but understudied topics in craniofacial research. As a group of musculoskeletal diseases, the onset of painful TMD is proved to be a result of disturbance of multiple systems. Recently, emerging evidence has revealed the involvement of neuroimmune interactions in painful TMD. Inflammatory factors play an important role in peripheral sensitization of temporomandibular joint (TMJ), and neurogenic inflammation in turn enhances TMJs dysfunction in TMD. Furthermore, centralized neuroimmune communications contribute to neuron excitability amplification, leading to pain sensitization, and is also responsible for chronic TMD pain and other CNS symptoms. Therapeutics targeting neuroimmune interactions may shed light on new approaches for treating TMD. In this review, we will discuss the role of neuroimmune interactions in the onset of painful TMD from the peripheral and centralized perspectives, and how understanding this mechanism could provide new treatment options. Insights into the neuroimmune interactions within TMJs and painful TMD would broaden the knowledge of mechanisms and treatments of this multifactorial disease.
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Affiliation(s)
- Yating Yi
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, No. 14 Section 3, Renmin South Road, Chengdu, 610041, China
| | - Xueman Zhou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, No. 14 Section 3, Renmin South Road, Chengdu, 610041, China
| | - Xin Xiong
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, No. 14 Section 3, Renmin South Road, Chengdu, 610041, China
| | - Jun Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, No. 14 Section 3, Renmin South Road, Chengdu, 610041, China
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Wan Q, Qin W, Ma Y, Shen M, Li J, Zhang Z, Chen J, Tay FR, Niu L, Jiao K. Crosstalk between Bone and Nerves within Bone. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2003390. [PMID: 33854888 PMCID: PMC8025013 DOI: 10.1002/advs.202003390] [Citation(s) in RCA: 71] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 10/29/2020] [Indexed: 05/11/2023]
Abstract
For the past two decades, the function of intrabony nerves on bone has been a subject of intense research, while the function of bone on intrabony nerves is still hidden in the corner. In the present review, the possible crosstalk between bone and intrabony peripheral nerves will be comprehensively analyzed. Peripheral nerves participate in bone development and repair via a host of signals generated through the secretion of neurotransmitters, neuropeptides, axon guidance factors and neurotrophins, with additional contribution from nerve-resident cells. In return, bone contributes to this microenvironmental rendezvous by housing the nerves within its internal milieu to provide mechanical support and a protective shelf. A large ensemble of chemical, mechanical, and electrical cues works in harmony with bone marrow stromal cells in the regulation of intrabony nerves. The crosstalk between bone and nerves is not limited to the physiological state, but also involved in various bone diseases including osteoporosis, osteoarthritis, heterotopic ossification, psychological stress-related bone abnormalities, and bone related tumors. This crosstalk may be harnessed in the design of tissue engineering scaffolds for repair of bone defects or be targeted for treatment of diseases related to bone and peripheral nerves.
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Affiliation(s)
- Qian‐Qian Wan
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical UniversityXi'anShaanxi710032China
| | - Wen‐Pin Qin
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical UniversityXi'anShaanxi710032China
| | - Yu‐Xuan Ma
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical UniversityXi'anShaanxi710032China
| | - Min‐Juan Shen
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical UniversityXi'anShaanxi710032China
| | - Jing Li
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical UniversityXi'anShaanxi710032China
| | - Zi‐Bin Zhang
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical UniversityXi'anShaanxi710032China
| | - Ji‐Hua Chen
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical UniversityXi'anShaanxi710032China
| | - Franklin R. Tay
- College of Graduate StudiesAugusta UniversityAugustaGA30912USA
| | - Li‐Na Niu
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical UniversityXi'anShaanxi710032China
| | - Kai Jiao
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical UniversityXi'anShaanxi710032China
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Expression of Dickkopf-related Protein 1 in Patients with Temporomandibular Osteoarthritis after Treatment with Hyaluronic Acid. Curr Med Sci 2020; 40:574-579. [DOI: 10.1007/s11596-020-2215-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 12/10/2019] [Indexed: 10/23/2022]
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Li L, Li Z, Li Y, Hu X, Zhang Y, Fan P. Profiling of inflammatory mediators in the synovial fluid related to pain in knee osteoarthritis. BMC Musculoskelet Disord 2020; 21:99. [PMID: 32059658 PMCID: PMC7023718 DOI: 10.1186/s12891-020-3120-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Accepted: 02/06/2020] [Indexed: 01/22/2023] Open
Abstract
Background Inflammatory mediators in the synovial fluid (SF) play critical roles in the initiation and development of pain in knee osteoarthritis (KOA). However, data for inflammatory marker expression are conflicting, and the role of SF inflammatory mediators in neuropathic pain is not clear. Therefore, the aim of this study was to identify SF inflammatory mediators associated with nociceptive and neuropathic pain in KOA. Methods Levels of IL-1β, IL-6, TNF-α, macrophage colony-stimulating factor, MMP-3, MMP-13, metalloproteinase with thrombospondin motifs 5, calcitonin gene-related peptide, neuropeptide Y, substance P and bradykinin were measured using enzyme-linked immunosorbent assays in 86 patients. Nociceptive pain was assessed using the numeric rating scale (NRS), visual analog scale (VAS) and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain score. Neuropathic pain was determined using the PainDETECT questionnaire. Moreover, knee function was evaluated by the WOMAC score and range of motion (ROM) assessments. Radiological grade was defined using the Kellgren-Lawrence (K-L) grading scale. Results Pain scores measured using different methods correlated highly with each other. A worse K-L grade and knee function were associated with worse pain. Expression of IL-1β and IL-6 was increased in the early stage compared with the late stage. The NRS score correlated positively with age, K-L grade, and the WOMAC score and negatively with ROM and TNF-α expression. The VAS correlated positively with age, K-L grade, and the WOMAC score but negatively with ROM and levels of IL-1β, IL-6 and TNF-α. The WOMAC pain score did not correlate with any of the inflammatory mediators measured; it correlated only with ROM. The PainDETECT score correlated only with the WOMAC score. Expression of other inflammatory mediators did not correlate with any of the pain scores. Conclusions IL-1β, IL-6 and TNF-α play critical roles in pain in the early stage of KOA and correlate with pain. The catabolic enzymes and neuropeptides measured do not correlate with nociceptive and neuropathic pain. New biomarkers related to pain in the late stage need to be further investigated.
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Affiliation(s)
- Li Li
- Zhejiang Provincial Key Laboratory of Anesthesiology, The Second Affiliated Hospital of Wenzhou Medical University, Yuying Children's Hospital, Wenzhou, China.,Department of Anesthesiology, The Second Affiliated Hospital of Wenzhou Medical University, Yuying Children's Hospital, Wenzhou, China
| | - Zhenxing Li
- Department of Orthopedics, The Second Affiliated Hospital of Wenzhou Medical University, Yuying Children's Hospital, No.109, Xueyuan West Road, Wenzhou, China
| | - Yuyan Li
- Department of Orthopedics, The Second Affiliated Hospital of Wenzhou Medical University, Yuying Children's Hospital, No.109, Xueyuan West Road, Wenzhou, China
| | - Xi Hu
- Department of Orthopedics, The Second Affiliated Hospital of Wenzhou Medical University, Yuying Children's Hospital, No.109, Xueyuan West Road, Wenzhou, China
| | - Yu Zhang
- Department of Orthopedics, The Second Affiliated Hospital of Wenzhou Medical University, Yuying Children's Hospital, No.109, Xueyuan West Road, Wenzhou, China
| | - Pei Fan
- Department of Orthopedics, The Second Affiliated Hospital of Wenzhou Medical University, Yuying Children's Hospital, No.109, Xueyuan West Road, Wenzhou, China. .,Zhejiang Provincial Key Laboratory of Orthopedics, The Second Affiliated Hospital of Wenzhou Medical University, Yuying Children's Hospital, No.109, Xueyuan West Road, Wenzhou, China.
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de Freitas Rodrigues A, de Oliveira Martins D, Chacur M, Luz JGC. The effectiveness of photobiomodulation in the management of temporomandibular pain sensitivity in rats: behavioral and neurochemical effects. Lasers Med Sci 2019; 35:447-453. [PMID: 31292820 DOI: 10.1007/s10103-019-02842-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 07/04/2019] [Indexed: 12/14/2022]
Abstract
This study analyzed the effects of photobiomodulation (PBM) with low-level laser therapy on nociceptive behavior and neuronal activity in the trigeminal nucleus after experimental unilateral temporomandibular joint (TMJ) disc injury. The animals were divided into 4 groups (n = 10 each): group 1, surgical injury of the articular disc and PBM; group 2, sham-operated subjected to PBM; group 3, surgical injury of the articular disc; and group 4, control (Naïve). Ten sessions of PBM were performed using GaAs laser with a wavelength of 904 nm, power of 75 W pico, average power of 0.043 W, area of the beam of 0.13 cm2, duration of the pulses of 60 nseg (in the frequency of 9500 Hz), energy density of 5.95 J/cm2, energy per point of 0.7 J, and power density of 333.8 mW/cm2, and the irradiation was done for 18 s per point. Neuropathic symptoms were evaluated using the von Frey test. Trigeminal ganglion samples underwent immunoblotting to examine the expression of substance P, vanilloid transient potential receptor of subtype-1 (TRPV-1), and peptide related to the calcitonin gene (CGRP). There was a total decrease in pain sensitivity after the second session of PBM in operated animals, and this decrease remains until the last session. There was a significant decrease in the expression of SP, TRPV-1, and CGRP after PBM. Photobiomodulation therapy was effective in reducing nociceptive behavior and trigeminal nucleus neuronal activity after TMJ disc injury.
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Affiliation(s)
- Alex de Freitas Rodrigues
- Laboratory of Functional Neuroanatomy of Pain, Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.,Department of Oral and Maxillofacial Surgery, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227, Cidade Universitária, São Paulo, SP, 05508-000, Brazil
| | - Daniel de Oliveira Martins
- Laboratory of Functional Neuroanatomy of Pain, Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Marucia Chacur
- Laboratory of Functional Neuroanatomy of Pain, Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - João Gualberto C Luz
- Department of Oral and Maxillofacial Surgery, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227, Cidade Universitária, São Paulo, SP, 05508-000, Brazil.
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Xiong H, Li W, Li J, Fang W, Ke J, Li B, Cheng Y, Wei L. Elevated leptin levels in temporomandibular joint osteoarthritis promote proinflammatory cytokine
IL
‐6 expression in synovial fibroblasts. J Oral Pathol Med 2019; 48:251-259. [PMID: 30597628 DOI: 10.1111/jop.12819] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/23/2018] [Indexed: 11/29/2022]
Affiliation(s)
- Haofei Xiong
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University Wuhan China
- Department of Oral EmergencySchool and Hospital of Stomatology, Wuhan University Wuhan China
| | - Wei Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University Wuhan China
- Department of Oral RadiologySchool and Hospital of Stomatology, Wuhan University Wuhan China
| | - Jiajie Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University Wuhan China
- Department of Oral RadiologySchool and Hospital of Stomatology, Wuhan University Wuhan China
| | - Wei Fang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University Wuhan China
- Department of Oral and Maxillofacial SurgerySchool and Hospital of Stomatology, Wuhan University Wuhan China
| | - Jin Ke
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University Wuhan China
- Department of Oral and Maxillofacial SurgerySchool and Hospital of Stomatology, Wuhan University Wuhan China
| | - Bo Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University Wuhan China
- Department of Oral RadiologySchool and Hospital of Stomatology, Wuhan University Wuhan China
| | - Yong Cheng
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University Wuhan China
- Department of Oral RadiologySchool and Hospital of Stomatology, Wuhan University Wuhan China
| | - Lili Wei
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University Wuhan China
- Department of Oral RadiologySchool and Hospital of Stomatology, Wuhan University Wuhan China
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Xiong H, Li W, Ke J, Fang W, Li B, Wei L. Leptin Levels in the Synovial Fluid of Patients With Temporomandibular Disorders. J Oral Maxillofac Surg 2018; 77:493-498. [PMID: 30321519 DOI: 10.1016/j.joms.2018.09.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/10/2018] [Accepted: 09/10/2018] [Indexed: 01/15/2023]
Abstract
PURPOSE This study was conducted to measure concentrations of leptin and interleukin-6 (IL-6) in the synovial fluid (SF) of 38 patients with temporomandibular disorders (TMDs) and 7 healthy controls and to analyze the correlation between leptin and IL-6. PATIENTS AND METHODS Patients with TMDs were divided into 3 subgroups according to imaging and clinical findings: displaced disc with reduction (DDR; n = 12), displaced disc without reduction (DDNR; n = 13), and osteoarthritis (OA; n = 13). SF samples were collected, and leptin and IL-6 levels were measured by enzyme-linked immunosorbent assay. RESULTS No relevant difference in leptin level was found between the control group and the DDR or DDNR group, whereas the OA group presented a higher leptin concentration than all other groups. IL-6 concentrations were markedly higher in all patient groups than in the control group. Levels were markedly higher in the OA group than in the DDR or DDNR group, but no relevant differences were found between the DDR and DDNR groups. No relevant correlation was found between leptin and IL-6 concentrations. CONCLUSION Distinct changes in leptin and IL-6 concentrations in the SF occurred at different stages of TMDs, suggesting their potential role in the pathogenesis of TMDs.
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Affiliation(s)
- Haofei Xiong
- Associate Professor, Department of Oral Emergency, State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and the Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Wei Li
- Senior Registrar, Department of Oral Radiology, State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and the Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Jin Ke
- Associate Professor, Department of Oral and Maxillofacial Surgery, State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and the Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Wei Fang
- Associate Professor, Department of Oral and Maxillofacial Surgery, State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and the Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Bo Li
- Associate Professor and Head, Department of Oral Radiology, State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and the Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Lili Wei
- Senior Registrar, Department of Oral Radiology, State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and the Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China.
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Kleine SA, Budsberg SC. Synovial membrane receptors as therapeutic targets: A review of receptor localization, structure, and function. J Orthop Res 2017; 35:1589-1605. [PMID: 28374922 DOI: 10.1002/jor.23568] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 03/28/2017] [Indexed: 02/04/2023]
Abstract
Joint pathology and degeneration is a significant cause of pain. The synovial membrane plays an important role in maintenance of the joint, contributes to the pathology of many arthropathies and may be adversely affected in joint disease. Improving knowledge of the receptors present within the synovium will aid in a better understanding of joint pathology and the development of new treatments for diseases such as osteoarthritis and rheumatoid arthritis. Knowledge of the location and function of synovial membrane receptors (both in healthy and diseased synovium) may provide important targets in the treatment of various arthropathies. Classic pain receptors such as opioid receptors in the synovium are a mainstay in local and systemic management of chronic pain in many species. In addition to these, many other receptors such as bradykinin, neurokinin, transient receptor potential vanilloid, and inflammatory receptors, such as prostanoid and interleukin receptors have been discovered within the synovial membrane. These receptors are important in pain, inflammation, and in maintenance of normal joint function and may serve as targets for pharmacologic intervention in pathologic states. The goal of this review is to outline synovial membrane receptor localization and local therapeutic modulation of these receptors, in order to stimulate further research into pharmacological management of arthropathies at the local level. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:1589-1605, 2017.
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Affiliation(s)
- Stephanie A Kleine
- Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, University of Georgia, 2200 College Station Road, Athens 30602, Georgia
| | - Steven C Budsberg
- Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, University of Georgia, 2200 College Station Road, Athens 30602, Georgia
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Grässel S, Muschter D. Peripheral Nerve Fibers and Their Neurotransmitters in Osteoarthritis Pathology. Int J Mol Sci 2017; 18:ijms18050931. [PMID: 28452955 PMCID: PMC5454844 DOI: 10.3390/ijms18050931] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 04/25/2017] [Accepted: 04/26/2017] [Indexed: 12/21/2022] Open
Abstract
The importance of the nociceptive nervous system for maintaining tissue homeostasis has been known for some time, and it has also been suggested that organogenesis and tissue repair are under neuronal control. Changes in peripheral joint innervation are supposed to be partly responsible for degenerative alterations in joint tissues which contribute to development of osteoarthritis. Various resident cell types of the musculoskeletal system express receptors for sensory and sympathetic neurotransmitters, allowing response to peripheral neuronal stimuli. Among them are mesenchymal stem cells, synovial fibroblasts, bone cells and chondrocytes of different origin, which express distinct subtypes of adrenoceptors (AR), receptors for vasoactive intestinal peptide (VIP), substance P (SP) and calcitonin gene-related peptide (CGRP). Some of these cell types synthesize and secrete neuropeptides such as SP, and they are positive for tyrosine-hydroxylase (TH), the rate limiting enzyme for biosynthesis of catecholamines. Sensory and sympathetic neurotransmitters are involved in the pathology of inflammatory diseases such as rheumatoid arthritis (RA) which manifests mainly in the joints. In addition, they seem to play a role in pathogenesis of priori degenerative joint disorders such as osteoarthritis (OA). Altogether it is evident that sensory and sympathetic neurotransmitters have crucial trophic effects which are critical for joint tissue and bone homeostasis. They modulate articular cartilage, subchondral bone and synovial tissue properties in physiological and pathophysiological conditions, in addition to their classical neurological features.
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Affiliation(s)
- Susanne Grässel
- Department of Orthopedic Surgery, Exp. Orthopedics, ZMB/Biopark 1, University of Regensburg, 93053 Regensburg, Germany.
| | - Dominique Muschter
- Department of Orthopedic Surgery, Exp. Orthopedics, ZMB/Biopark 1, University of Regensburg, 93053 Regensburg, Germany.
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Zhu P, Lin H, Zhou Q, Lv J, Zhang Z, Xu Y. Dynamic Evaluation of Lavage Efficacy in Upper Compartment of the Temporomandibular Joint. J Oral Maxillofac Surg 2016; 75:276-283. [PMID: 27663533 DOI: 10.1016/j.joms.2016.08.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 08/03/2016] [Accepted: 08/15/2016] [Indexed: 10/21/2022]
Abstract
PURPOSE The aim of this study was to determine the most efficient temporomandibular joint (TMJ) lavage technique for complete irrigation and removal of synovial fluid. The corresponding total lavage fluid volume needed also was investigated. MATERIALS AND METHODS Three-dimensional TMJ lavage models of the classic double- and single-needle techniques with modified cannula sizes (diameters, 2.4 and 0.8 mm) were generated based on a constructed upper compartment model. Models were integrated with 2-phase flow models to predict fractional fluid volume (α value) changes of lavage saline and synovial fluid within the upper compartment of the TMJ. Fluid flow diagrams, velocity vectors, and intra-articular pressure data were collected and compared among the models. Models were validated by clinical synovial fluid concentration analyses, with vitamin B12 used as an internal standard. RESULTS In all 8 models, lavage fluid initially gathered around the inflow portal, with a stable mixture of synovial and lavage fluids eventually being established in the compartment. Use of the double-needle technique with a large inflow portal resulted in thorough lavage (α = 100%). When the single-needle or Shepard cannula technique was used, some areas within the upper compartment remained devoid of brisk flow. The 2.4-mm inflow model coupled with a 0.8-mm outflow portal resulted in a stably and persistently high intra-articular pressure (>2.7 × 104 Pa). A minimum volume of 109 mL of lavage fluid was necessary for complete replacement of synovial fluid by saline. CONCLUSIONS When a 2.4-mm inflow portal needle was applied, a lavage rate of 100% was obtained with a minimum lavage volume of 109 mL. Using a small inflow portal could lead to inadequate flow, residual synovial fluid, and, ultimately, treatment failure.
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Affiliation(s)
- Ping Zhu
- Dental Student, Department of Oral and Maxillofacial Surgery, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University, Guangzhou; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Han Lin
- Dental Student, Department of Oral and Maxillofacial Surgery, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University, Guangzhou; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Quan Zhou
- Professor, Zhuhai Central Station of Marine Environmental Monitoring, State Oceanic Administration, Zhuhai, China
| | - Jiahong Lv
- Dental Student, Department of Orthodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University, Guangzhou; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Zhiguang Zhang
- Professor, Department of Oral and Maxillofacial Surgery, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University, Guangzhou; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Yue Xu
- Professor, Department of Orthodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University, Guangzhou; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China.
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Sensory Neuropeptides and Endogenous Opioids Expression in Human Dental Pulp with Asymptomatic Inflammation: In Vivo Study. Mediators Inflamm 2015; 2015:879126. [PMID: 26538838 PMCID: PMC4619975 DOI: 10.1155/2015/879126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 07/01/2015] [Accepted: 07/07/2015] [Indexed: 11/18/2022] Open
Abstract
Purpose. This study quantified the expression of substance P (SP), calcitonin gene-related peptide (CGRP), β-endorphins (β-End), and methionine-enkephalin (Met-Enk) in human dental pulp following orthodontic intrusion. Methods. Eight patients were selected according to preestablished inclusion criteria. From each patient, two premolars (indicated for extraction due to orthodontic reasons) were randomly assigned to two different groups: the asymptomatic inflammation group (EXPg), which would undergo controlled intrusive force for seven days, and the control group (CTRg), which was used to determine the basal levels of each substance. Once extracted, dental pulp tissue was prepared to determine the expression levels of both neuropeptides and endogenous opioids by radioimmunoassay (RIA). Results. All samples from the CTRg exhibited basal levels of both neuropeptides and endogenous opioids. By day seven, all patients were asymptomatic, even when all orthodontic-intrusive devices were still active. In the EXPg, the SP and CGRP exhibited statistically significant different levels. Although none of the endogenous opioids showed statistically significant differences, they all expressed increasing trends in the EXPg. Conclusions. SP and CGRP were identified in dental pulp after seven days of controlled orthodontic intrusion movement, even in the absence of pain.
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