Volume 22, Issue 4 pp. 636-645
ORIGINAL ARTICLE

Comparative study on serum-induced arthritis in the temporomandibular and limb joint of mice

Sema Safi

Corresponding Author

Sema Safi

Department of Orthodontics, University Hospital of Bonn, Bonn, Germany

Correspondence

Sema Safi, Department of Orthodontics, University Hospital of Bonn, Bonn, Germany.

Email: [email protected]

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David Frommholz

David Frommholz

Department of Natural Sciences, Immunology and Cell Biology, University of Applied Sciences Bonn-Rhein-Sieg, Rheinbach, Germany

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Susanne Reimann

Susanne Reimann

Oral Technology, University of Bonn, Bonn, Germany

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Werner Götz

Werner Götz

Department of Orthodontics, University Hospital of Bonn, Bonn, Germany

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Christoph Bourauel

Christoph Bourauel

Oral Technology, University of Bonn, Bonn, Germany

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Anna-Lena Neumann

Anna-Lena Neumann

Institute for Medical Microbiology, Immunology, and Parasitology, University Hospital of Bonn, Bonn, Germany

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Achim Hoerauf

Achim Hoerauf

Institute for Medical Microbiology, Immunology, and Parasitology, University Hospital of Bonn, Bonn, Germany

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Harald Illges

Harald Illges

Department of Natural Sciences, Immunology and Cell Biology, University of Applied Sciences Bonn-Rhein-Sieg, Rheinbach, Germany

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Ali-Farid Safi

Ali-Farid Safi

Department for Oral and Craniomaxillofacial Plastic Surgery, University of Cologne, Cologne, Germany

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Andreas Jäger

Andreas Jäger

Department of Orthodontics, University Hospital of Bonn, Bonn, Germany

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Marc P. Hübner

Marc P. Hübner

Institute for Medical Microbiology, Immunology, and Parasitology, University Hospital of Bonn, Bonn, Germany

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Lina Gölz

Lina Gölz

Department of Orthodontics, University Hospital of Bonn, Bonn, Germany

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First published: 21 January 2019
Citations: 4
Hübner and Gölz contributed equally.
[Correction added on 3 July 2019, after first online publication: Surname of author Harald Illges has been corrected.]

Abstract

Introduction

The subject of the present study was a systematic comparative analysis of the rheumatoid arthritis (RA)-induced pathomechanisms in the temporomandibular joint with those of the limb joints using the serum-induced arthritis K/BxN model.

Methods

In 18 BALB/c mice the induction of RA was performed according to the Kouskoff method. Another healthy cohort served as controls (n = 12). Joint swelling of the paws was measured using a micrometer. Functional data were obtained analyzing locomotion. Three-dimensional examination of the temporomandibular joint was performed with micro-computed tomography imaging, followed by histological evaluation of the extremity joints and the temporomandibular joint. Additionally, immunohistochemical investigations were carried out to evaluate inflammatory and immunological changes.

Results

Measurement of joint swelling showed a significant increase in the diameter of the paws, as well as a decrease in locomotor activity compared to control animals and the time before arthritis induction. Histological and immunohistochemical investigations showed clear signs of inflammation in the extremity joints. In contrast, no histological or immunohistochemical indications of an inflammatory process were detectable in the temporomandibular joint. In addition, the three-dimensional analysis by micro-computed tomography of the temporomandibular joints did not show any obvious morphological changes.

Conclusion

For the first time, using the K/BxN model we could demonstrate that, due to its anatomical and mechanical conditions, the temporomandibular joint seems to be less susceptible to the initiation of RA compared to limb joints. Therefore, additional investigations are needed on other arthritis models as well, in order to further improve our understanding of the pathogenesis and defense mechanisms of the disease.

CONFLICT OF INTEREST

The authors report no financial disclosure and no conflicts of interest.

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