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Identification and Characterization of the Intra-Articular Microbiome in the Osteoarthritic Knee. Int J Mol Sci 2020; 21:ijms21228618. [PMID: 33207573 PMCID: PMC7697780 DOI: 10.3390/ijms21228618] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 11/04/2020] [Accepted: 11/13/2020] [Indexed: 12/21/2022] Open
Abstract
Osteoarthritis (OA) is the most common joint disorder in the United States, and the gut microbiome has recently emerged as a potential etiologic factor in OA development. Recent studies have shown that a microbiome is present at joint synovia. Therefore, we aimed to characterize the intra-articular microbiome within osteoarthritic synovia and to illustrate its role in OA disease progression. RNA-sequencing data from OA patient synovial tissue was aligned to a library of microbial reference genomes to identify microbial reads indicative of microbial abundance. Microbial abundance data of OA and normal samples was compared to identify differentially abundant microbes. We computationally explored the correlation of differentially abundant microbes to immunological gene signatures, immune signaling pathways, and immune cell infiltration. We found that microbes correlated to OA are related to dysregulation of two main functional pathways: increased inflammation-induced extracellular matrix remodeling and decreased cell signaling pathways crucial for joint and immune function. We also confirmed that the differentially abundant and biologically relevant microbes we had identified were not contaminants. Collectively, our findings contribute to the understanding of the human microbiome, well-known OA risk factors, and the role microbes play in OA pathogenesis. In conclusion, we present previously undiscovered microbes implicated in the OA disease progression that may be useful for future treatment purposes.
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Ulmner M, Sugars R, Naimi-Akbar A, Suslu S, Reseland JE, Kruger-Weiner C, Lund B. Synovial tissue cytokine profile in disc displacement of the temporomandibular joint. J Oral Rehabil 2020; 47:1202-1211. [PMID: 32640062 DOI: 10.1111/joor.13051] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 06/22/2020] [Accepted: 06/30/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND Symptomatic disc displacement (DD) of the temporomandibular joint (TMJ) may cause pain and limited mouth opening. The aetiopathogenesis is obscure and probably complex, which makes the diagnostic classification crude and mainly based on clinical criteria rather than disease mechanisms, and tissue characteristics. OBJECTIVES The study aim was to characterise and quantify synovial tissue in DD, where specific cytokine patterns might serve as potential biomarkers. METHODS An observational cohort study was performed harvesting synovial tissue from 63 patients: 44 with DD without reduction (DDwoR) and 19 with DD with reduction (DDwR). DDwoR was subdivided depending on type of onset (sudden, n = 17; delayed, n = 27), and DDwR served as the control group. Proteins were extracted from tissue samples and investigated in a multi-analytic profiling system. RESULTS DDwoR patients had significantly higher concentrations in 12 out of 28 analysed cytokines compared to DDwR. In the same statistical model, significantly lower concentrations of interferon gamma-induced protein (IP) 10, osteoprotegerin (OPG) and RANTES were detected in DDwoR patients. Women showed significantly higher concentrations of epidermal growth factor and interleukin (IL) 1ra compared to men. DDwoR with sudden onset had significant higher concentrations of bone morphogenetic protein 4, eotaxin and IL-8 compared to DDwoR with delayed onset. CONCLUSIONS Characterising the biomarker panel for TMJ conditions may serve as suggestible targets for disease classification and novel treatment options. The significantly lower concentrations of IP-10, OPG and RANTES could be proposed as putative markers for the separation of the studied conditions to other TMJ diseases.
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Affiliation(s)
- Mattias Ulmner
- Department of Craniofacial Diseases, Karolinska University Hospital, Stockholm, Sweden.,Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Rachael Sugars
- Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Aron Naimi-Akbar
- Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden.,Health Technology Assessment-Odontology (HTA-O), Malmö University, Malmö, Sweden
| | - Safiyye Suslu
- Department of Biomaterials, Institute of Clinical Dentistry, Faculty of Dentistry, University of Oslo, Oslo, Norway
| | - Janne Elin Reseland
- Department of Biomaterials, Institute of Clinical Dentistry, Faculty of Dentistry, University of Oslo, Oslo, Norway
| | - Carina Kruger-Weiner
- Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden.,Department of Oral and Maxillofacial Surgery, Folktandvården Stockholm, Eastman institutet, Stockholm, Sweden
| | - Bodil Lund
- Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway.,Department of Oral and Maxillofacial Surgery, Haukeland University Hospital, Bergen, Norway
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Lund B, Ulmner M, Bjørnland T, Berge T, Olsen-Bergem H, Rosèn A. A disease-focused view on the temporomandibular joint using a Delphi-guided process. J Oral Sci 2020; 62:1-8. [DOI: 10.2334/josnusd.19-0128] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Bodil Lund
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen
- Department of Dental Medicine, Karolinska Institutet
- Department of Oral and Maxillofacial Surgery, Haukeland University Hospital
| | - Mattias Ulmner
- Department of Dental Medicine, Karolinska Institutet
- P.F. Craniofacial diseases, Karolinska University Hospital
| | - Tore Bjørnland
- Department of Oral Surgery and Oral Medicine, Faculty of Dentistry, University of Oslo
| | - Trond Berge
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen
- Department of Oral and Maxillofacial Surgery, Haukeland University Hospital
| | - Heming Olsen-Bergem
- Department of Oral Surgery and Oral Medicine, Faculty of Dentistry, University of Oslo
| | - Annika Rosèn
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen
- Department of Oral and Maxillofacial Surgery, Haukeland University Hospital
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Hammad DBM, Liyanapathirana V, Tonge DP. Molecular characterisation of the synovial fluid microbiome in rheumatoid arthritis patients and healthy control subjects. PLoS One 2019; 14:e0225110. [PMID: 31751379 PMCID: PMC6871869 DOI: 10.1371/journal.pone.0225110] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 10/28/2019] [Indexed: 12/13/2022] Open
Abstract
METHODS The presence and identity of bacterial and fungal DNA in the synovial fluid of rheumatoid arthritis (RA) patients and healthy control subjects was investigated through amplification and sequencing of the bacterial 16S rRNA gene and fungal internal transcribed spacer region 2 respectively. Synovial fluid concentrations of the cytokines IL-6, IL-17A, IL22 and IL-23 were determined by ELISA. RESULTS Bacterial 16S rRNA genes were detected in 87.5% RA patients, and all healthy control subjects. At the phylum level, the microbiome was predominated by Proteobacteria (Control = 83.5%, RA = 79.3%) and Firmicutes (Control = 16.1%, RA = 20.3%), and to a much lesser extent, Actinobacteria (Control = 0.2%, RA = 0.3%) and Bacteroidetes (Control = 0.1%, RA = 0.1%). Fungal DNA was identified in 75% RA samples, and 88.8% healthy controls. At the phylum level, synovial fluid was predominated by members of the Basidiomycota (Control = 53.9%, RA = 46.9%) and Ascomycota (Control = 35.1%, RA = 50.8%) phyla. Statistical analysis revealed key taxa that were differentially present or abundant dependent on disease status. CONCLUSIONS This study reports the presence of a synovial fluid microbiome, and determines that this is modulated by disease status (RA) as are other classical microbiome niches.
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Affiliation(s)
- Dargham Bayan Mohsen Hammad
- School of Life Sciences, Faculty of Natural Sciences, Keele University, Keele, Newcastle, England, United Kingdom
| | | | - Daniel Paul Tonge
- School of Life Sciences, Faculty of Natural Sciences, Keele University, Keele, Newcastle, England, United Kingdom
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5
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Yusuf A, Casey A. Surface modification of silver nanoparticle (AgNP) by liposomal encapsulation mitigates AgNP-induced inflammation. Toxicol In Vitro 2019; 61:104641. [PMID: 31493545 DOI: 10.1016/j.tiv.2019.104641] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 08/25/2019] [Accepted: 09/03/2019] [Indexed: 12/21/2022]
Abstract
Silver nanoparticles (AgNP) are widely used in a variety of consumable products as antibacterial to prevent or treat infection. Unfortunately, evidence exits that AgNP induces inflammation which can worsen with repeated human exposure. However, there is little or no research on how to mitigate these adverse effects due to AgNP induced-toxicity. Here, we investigated if surface modification of AgNP by liposomal encapsulation suppresses AgNP-mediated inflammatory responses in THP1 monocytes and THP1 differentiated macrophages (TDM). AgNP was encapsulated in a dipalmitoyl phosphatidyl choline- (DPPC)/cholesterol-based liposome by extrusion through a 100-nm polycarbonate membrane to form Lipo-AgNP. It was found as expected that AgNP induced significant release of IL-1β, IL-6, IL-8 and TNF-α in THP1 monocytes more than the basal level. Interestingly, release of these cytokines was suppressed by Lipo-AgNP. In TDMs, AgNP and Lipo-AgNP induced IL-8 release (p < .0001), but Lipo-AgNP maintained IL-8 release at levels significantly lower than that of AgNP (p < .01). However, both AgNP and Lipo-AgNP suppressed IL-1β and TNF-α release in LPS-stimulated THP1 monocytes and LPS-stimulated or unstimulated TDM respectively. We finally showed that Lipo-AgNP inhibits STAT-3 and this may be responsible for regulating the uncontrolled inflammation induced by AgNP likely mediated STAT-3 protein expression in LPS stimulated THP1 monocytes and TDMs, both LPS-stimulated and unstimulated. This data showed that Lipo-AgNP suppressed AgNP induced inflammation, making Lipo-AgNP particularly useful in treatment of bacteria induced inflammatory diseases and inflammatory cancers.
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Affiliation(s)
- Azeez Yusuf
- School of Physics, Technological University Dublin, Kevin Street, Dublin 8, Ireland; Nanolab Research Centre, FOCAS Research Institute, Technological University Dublin, Kevin Street, Dublin 8, Ireland.
| | - Alan Casey
- School of Physics, Technological University Dublin, Kevin Street, Dublin 8, Ireland; Nanolab Research Centre, FOCAS Research Institute, Technological University Dublin, Kevin Street, Dublin 8, Ireland
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Savage J, Lababidi E, McCullough M, Dimitroulis G. Microbiological investigation of the mandibular condyle in patients with advanced osteoarthritis of the temporomandibular joint. J Craniomaxillofac Surg 2019; 47:1262-1265. [PMID: 31327559 DOI: 10.1016/j.jcms.2019.03.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Revised: 03/09/2019] [Accepted: 03/14/2019] [Indexed: 10/27/2022] Open
Abstract
PURPOSE The aim of this study was to investigate the presence of bacteria in samples of the temporomandibular joint taken from patients suffering from advanced osteoarthritis of the temporomandibular joint (TMJ). MATERIALS AND METHODS 25 fresh mandibular condyle samples were taken from 17 consecutive patients undergoing mandibular condylectomy (8 bilateral) for advanced TMJ osteoarthritis (Dimitroulis Category 5 joints). The joint samples were stained and cultured for the presence of microorganisms following a standardised joint culture protocol. RESULTS No evidence of bacteria was found on staining or solid culture mediums. Late growth (day 12) of commensal skin organisms (P. Acnes, S. Epidermitis, S. Capitis) were identified in enriched broth samples in 5 joint samples. No statistically significant associations were noted between positive broth samples and age or previous joint intervention (p > 0.05) CONCLUSIONS: Within the limitations of this study, we have failed to identify meaningful bacterial growth in tissues (i.e. condylar head) of the TMJ that would suggest a contributory bacterial pathogenesis for arthritis of the TMJ.
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Affiliation(s)
- J Savage
- Maxillofacial Surgery Unit, Dept of Surgery, St Vincent's Hospital, University of Melbourne, Victoria, Australia
| | - E Lababidi
- Melbourne Dental School, The University of Melbourne, Victoria, Australia.
| | - M McCullough
- Melbourne Dental School, The University of Melbourne, Victoria, Australia
| | - G Dimitroulis
- Maxillofacial Surgery Unit, Dept of Surgery, St Vincent's Hospital, University of Melbourne, Victoria, Australia
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7
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Lei J, Yap AUJ, Liu MQ, Fu KY. Condylar repair and regeneration in adolescents/young adults with early-stage degenerative temporomandibular joint disease: A randomised controlled study. J Oral Rehabil 2019; 46:704-714. [PMID: 31009097 DOI: 10.1111/joor.12805] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 03/08/2019] [Accepted: 04/10/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND Anterior repositioning splint (ARS) can facilitate regenerative condylar remodelling. OBJECTIVE To determine the effect of ARS on osseous condylar changes in adolescents/young adults with early-stage degenerative joint disease (DJD). METHODS Sixty-nine patients with early-stage temporomandibular joint (TMJ) DJD based on the Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) and cone beam computed tomography (CBCT) imaging were recruited and randomly allocated to two treatment groups: (a) conservative therapy with ARS and (b) conservative therapy without ARS. Subjects with acute TMJ closed-lock had their displaced discs physically reduced by mandibular manipulation prior to ARS therapy. Clinical and CBCT data of 59 patients (86.4% females, mean age 17.95 ± 4.53 years, 67 joints) were attained pre- and at 6 or 12 months post-treatment. Osseous changes after treatment were categorised into (a) progressed, (b) unchanged, (c) repaired (remodelled without new bone formation) and (d) regenerated (remodelled with new bone formation). Statistical analysis including chi-square test, independent samples t test or Mann-Whitney U test was conducted. RESULTS About 85.5% of patients (59/69) completed the study, with 28 subjects (32 joints) in the splint group and 31 (35 joints) in the control group. The occurrence of condylar repair and regeneration was significantly higher with ARS (78.1%/[25/32] of joints) when compared to control group (48.6%/[17/35]) (P < 0.05). Moreover, condylar regeneration was exclusively observed in 50%/(16/32) of joints with ARS. For the 14 joints in splint group that received physical TMJ closed-lock reduction, 85.7%/(12/14) exhibited condylar regeneration. The splint group (3.1%/[1/32]) also had significantly lower incidence of progressive TMJ degeneration than the control (37.1%/[13/35]) (P < 0.001). CONCLUSION Condylar repair and regeneration in early-stage TMJ DJD are possible, and ideal spatial disc-condyle relationship appears important. The possibility of restoring TMJ form/structure by ARS therapy presents an attractive area of new basic science and clinical research (Bone defect repair in early osteoarthrosis of temporomandibular joint by joint distraction therapy: A randomized controlled trial/ChiCTR-TRC-14005172).
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Affiliation(s)
- Jie Lei
- Center for TMD & Orofacial Pain, Peking University School & Hospital of Stomatology, Beijing, China.,Department of Oral & Maxillofacial Radiology, Peking University School & Hospital of Stomatology, Beijing, China.,National Clinical Research Center for Oral Diseases, Beijing, China.,National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, China.,Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Adrian U-J Yap
- Center for TMD & Orofacial Pain, Peking University School & Hospital of Stomatology, Beijing, China.,Department of Dentistry, Ng Teng Fong General Hospital, National University Health System, Singapore City, Singapore.,Faculty of Dentistry, National University of Singapore, Singapore City, Singapore
| | - Mu-Qing Liu
- Center for TMD & Orofacial Pain, Peking University School & Hospital of Stomatology, Beijing, China.,Department of Oral & Maxillofacial Radiology, Peking University School & Hospital of Stomatology, Beijing, China.,National Clinical Research Center for Oral Diseases, Beijing, China.,National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, China.,Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Kai-Yuan Fu
- Center for TMD & Orofacial Pain, Peking University School & Hospital of Stomatology, Beijing, China.,Department of Oral & Maxillofacial Radiology, Peking University School & Hospital of Stomatology, Beijing, China.,National Clinical Research Center for Oral Diseases, Beijing, China.,National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, China.,Beijing Key Laboratory of Digital Stomatology, Beijing, China
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8
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Kasperkiewicz K, Eppa Ł, Świerzko AS, Bartłomiejczyk MA, Żuber ZM, Siniewicz-Luzeńczyk K, Mężyk E, Matsushita M, Bąk-Romaniszyn L, Zeman K, Skurnik M, Cedzyński M. Lectin pathway factors in patients suffering from juvenile idiopathic arthritis. Immunol Cell Biol 2017; 95:666-675. [PMID: 28405017 DOI: 10.1038/icb.2017.31] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 04/07/2017] [Accepted: 04/08/2017] [Indexed: 02/06/2023]
Abstract
Both complement activation and certain infections (including those with Yersinia sp.) may contribute to the pathogenesis of juvenile idiopathic arthritis (JIA). We investigated factors specific for the lectin pathway of complement: mannose-binding lectin (MBL), ficolins and MBL-associated serine protease-2 (MASP-2), in 144 patients and 98 controls. One hundred and six patients had oligoarticular disease and 38 had polyarticular disease. In 51 patients (out of 133 tested), Yersinia-reactive antibodies were found (JIA Ye+ group). MBL deficiency was significantly more frequent in the JIA Ye+ group than in patients without Yersinia-reactive antibodies or in controls. Median serum ficolin-2 level was significantly lower (and proportion of values deemed ficolin-2 insufficient greater) in JIA patients irrespective of their Yersinia antibody status. The minority (C) allele at -64 of the FCN2 gene was less frequent among JIA patients than among control subjects. No differences were found in the frequency of FCN3 gene +1637delC or MASP2 +359 A>G mutations nor for median values of serum ficolin-1, ficolin-3 or MASP-2. However, high levels of serum ficolin-3 were under-represented in patients, in contrast to MBL. MBL, ficolin-1, ficolin-2, ficolin-3 and MASP-2 were also readily detectable in synovial fluid samples but at a considerably lower level than in serum. Our findings suggest a possible role for the lectin pathway in the pathogenesis of JIA, perhaps secondary to a role in host defence, and indicate that investigations on the specificity of lectin pathway recognition molecules towards specific infectious agents in JIA might be fruitful.
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Affiliation(s)
- Katarzyna Kasperkiewicz
- Faculty of Biology and Environmental Protection, Department of Microbiology, University of Silesia, Katowice, Poland
| | - Łukasz Eppa
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Lodz, Poland
| | - Anna S Świerzko
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Lodz, Poland
| | - Marcin A Bartłomiejczyk
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Lodz, Poland
| | - Zbigniew M Żuber
- Department of Rheumatology, St Louis Voivodeship Specialist Children's Hospital, Cracow, Poland
| | - Katarzyna Siniewicz-Luzeńczyk
- Department of Paediatrics, Immunology and Nephrology, Polish Mother's Memorial Hospital Research Institute, Lodz, Poland
| | - Elżbieta Mężyk
- Department of Rheumatology, St Louis Voivodeship Specialist Children's Hospital, Cracow, Poland
| | - Misao Matsushita
- Department of Applied Biochemistry, Tokai University, Hiratsuka-shi, Kanagawa, Japan
| | - Leokadia Bąk-Romaniszyn
- Department of Nutrition in Digestive Tract Diseases, Medical University of Lodz, Lodz, Poland
| | - Krzysztof Zeman
- Department of Paediatrics, Immunology and Nephrology, Polish Mother's Memorial Hospital Research Institute, Lodz, Poland
| | - Mikael Skurnik
- Research Programs Unit, Department of Bacteriology and Immunology, Medicum, Immunobiology, University of Helsinki, Helsinki, Finland
- Helsinki University Central Hospital Laboratory Diagnostics, Helsinki, Finland
| | - Maciej Cedzyński
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Lodz, Poland
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McIlwrath SL, Nesemeier R, Ma F, Oz HS, Zhang L, Westlund KN. Inflammatory 'double hit' model of temporomandibular joint disorder with elevated CCL2, CXCL9, CXCL10, RANTES and behavioural hypersensitivity in TNFR1/R2-/- mice. Eur J Pain 2017; 21:1209-1223. [PMID: 28318085 DOI: 10.1002/ejp.1021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/20/2017] [Indexed: 01/12/2023]
Abstract
BACKGROUND Patients with temporomandibular joint disorders (TMD), reactive arthritis and rheumatoid arthritis often have combined etiology of hereditary and microenvironmental factors contributing to joint pain. Multiple clinical and animal studies indicate 'double-hit' inflammatory insults can cause chronic inflammation. The first inflammatory insult primes the immune system and subsequent insults elicit amplified responses. The present 'double hit' study produced a chronic orofacial pain model in mice with genetic deletion of both TNFα receptors (TNFR1/R2-/-), investigating the main nociceptive signalling pathways in comparisons to wild type mice. METHODS An initial inflammatory insult was given unilaterally into the temporomandibular joint (TMJ). Secondary hypersensitivity was tested on the skin over the TMJ throughout the experiment. Three weeks later after complete reversal of hypersensitivity, a second inflammatory insult was imposed on the colon. Pharmacological interventions were tested for efficacy after week 10 when hypersensitivity was chronic in TNFR1/R2-/- mice. Serum cytokines were analysed at Days 1, 14, and Week 18. RESULTS The double hit insult produced chronic hypersensitivity continuing through the 4-month experimental timeline in the absence of TNFα signalling. P2X7 and NMDA receptor antagonists temporarily attenuated chronic hypersensitivity. Serum cytokine/chemokine analysis on Day 14 when CFA induced hypersensitivity was resolved identified increased levels of pro-inflammatory cytokines CCL2, CXCL9, CXCL10, RANTES and decreased levels of anti-inflammatory cytokines IL-1ra and IL-4 in TNFR1/R2-/- compared to WT mice. CONCLUSIONS These data suggest a causal feed-forward signalling cascade of these little studied cytokines have the potential to cause recrudescence in this orofacial inflammatory pain model in the absence of TNFα signalling. SIGNIFICANCE Using a mouse model of chronic inflammatory temporomandibular joint disorder, we determined that absence of functional TNFR1/R2 induces aberrant inflammatory signalling caused by other increased pro-inflammatory and decreased anti-inflammatory cytokines that could serve as blood biomarkers and may predict disease progression.
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Affiliation(s)
- S L McIlwrath
- Department of Physiology, College of Medicine, University of Kentucky, Lexington, USA
| | - R Nesemeier
- Department of Physiology, College of Medicine, University of Kentucky, Lexington, USA
| | - F Ma
- Department of Physiology, College of Medicine, University of Kentucky, Lexington, USA
| | - H S Oz
- Department of Physiology, College of Medicine, University of Kentucky, Lexington, USA
| | - L Zhang
- Department of Physiology, College of Medicine, University of Kentucky, Lexington, USA
| | - K N Westlund
- Department of Physiology, College of Medicine, University of Kentucky, Lexington, USA
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10
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Tabeian H, Bakker AD, de Vries TJ, Zandieh-Doulabi B, Lobbezoo F, Everts V. Juvenile porcine temporomandibular joint: Three different cartilaginous structures? Arch Oral Biol 2016; 72:211-218. [PMID: 27612163 DOI: 10.1016/j.archoralbio.2016.08.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 08/10/2016] [Accepted: 08/29/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The temporomandibular joint (TMJ) consists of three cartilaginous structures: the fossa, disc, and condyle. In juvenile idiopathic arthritis (JIA), inflammation of the TMJ leads to destruction of the condyle, but not of the fossa or the disc. Such a different effect of inflammation might be related to differences in matrix composition of the cartilaginous structures. METHODS The matrix composition of the three TMJ structures was analyzed in juvenile porcine samples and in an in vitro system of cells isolated from each anatomical structure embedded in 3% agarose gels. RESULTS The matrix of all three anatomical structures of the TMJ contained collagen type I and its gene expression was maintained after isolation. The condyle and the fossa stained positive for collagen type II and proteoglycans, but the condyle contained considerably more collagen type II and proteoglycans than the fossa. The disc contained neither collagen type II protein nor expression of its gene, and the disc did not stain positive for proteoglycans. Aggrecan gene expression was lower in the disc compared to condyle and fossa cell-isolates. In general, the cell-isolates in vitro closely mimicked the characteristic features found in the tissue. CONCLUSION The collagen type II content of the condyle clearly distinguished this cartilaginous structure from the disc and fossa. Since autoimmunity against collagen type II is associated with JIA, the relatively abundant presence of this type of collagen in the condyle might provide an explanation why primarily this cartilaginous structure of the TMJ is affected in JIA patients.
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Affiliation(s)
- Hessam Tabeian
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, MOVE Research Institute Amsterdam, Amsterdam, The Netherlands
| | - Astrid D Bakker
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, MOVE Research Institute Amsterdam, Amsterdam, The Netherlands
| | - Teun J de Vries
- Department of Periodontology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, MOVE Research Institute Amsterdam, Amsterdam, The Netherlands.
| | - Behrouz Zandieh-Doulabi
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, MOVE Research Institute Amsterdam, Amsterdam, The Netherlands
| | - Frank Lobbezoo
- Department of Oral Kinesiology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, MOVE Research Institute Amsterdam, Amsterdam, The Netherlands
| | - Vincent Everts
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, MOVE Research Institute Amsterdam, Amsterdam, The Netherlands
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