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Temporomandibular joint damage in K/BxN arthritic mice

International Journal of Oral Science 2020年第1期12卷 59-67页

作者： Sabine Kuchler-Bopp Alexandre Mariotte Marion Strub Chrystelle Po Aurore De Cauwer Georg Schulz Xavier Van Bellinghen Florence Fioretti francois clauss Philippe Georgel Nadia Benkirane-Jessel Fabien Bornert INSERM(French National Institute of Health and Medical Research) UMR 1260Regenerative NanoMedicine(RNM)FMTSStrasbourgFrance INSERM UMR 1109Immuno Rhumatologie Moléculaire(IRM)FMTSStrasbourgFrance Fédération Hospitalo-Universitaire(FHU)OMICARE Universitéde StrasbourgStrasbourgFrance Facultéde Chirurgie Dentaire Universitéde Strasbourg(UDS)8 rue Ste ElisabethStrasbourgFrance Pole de Médecine et Chirurgie Bucco-Dentaires Hopitaux Universitaires de Strasbourg(HUS)1 place de l’HopitalStrasbourgFrance ICube UMR 7357 Universitéde StrasbourgCNRSFMTS4 rue KirschlegerStrasbourgFrance Department of Biomedical Engineering Core Facility Micro-and NanotomographyBiomaterials Science Center(BMC)University of BaselGewerbestrasse 144123AllschwilSwitzerland

Rheumatoid arthritis(RA) is an autoimmune disease affecting 1% of the world population and is characterized by chronic inflammation of the joints sometimes accompanied by extra-articular manifestations. K/Bx N mice, originally described in 1996 as a model of polyarthritis, exhibit knee joint alterations. The aim of this study was to describe temporomandibular joint(TMJ)inflammation and damage in these mice. We used relevant imaging modalities, such as micro-magnetic resonance imaging(μMRI)and micro-computed tomography(μCT), as well as histology and immunofluorescence techniques to detect TMJ alterations in this mouse model. Histology and immunofluorescence for Col-I, Col-II, and aggrecan showed cartilage damage in the TMJ of K/Bx N animals, which was also evidenced by μCT but was less pronounced than that seen in the knee joints. μMRI observations suggested an increased volume of the upper articular cavity, an indicator of an inflammatory process. Fibroblast-like synoviocytes(FLSs)isolated from the TMJ of K/Bx N mice secreted inflammatory cytokines(IL-6 and IL-1β) and expressed degradative mediators such as matrix metalloproteinases(MMPs). K/Bx N mice represent an attractive model for describing and investigating spontaneous damage to the TMJ, a painful disorder in humans with an etiology that is still poorly understood.

关键词： damage alterations inflammation

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Nanoscale Stiffness Distribution in Bone Metastasis

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World Journal of Nano Science and Engineering 2015年第4期5卷 219-228页

作者： Ludovic Richert Laetitia Keller Quentin Wagner Fabien Bornert Catherine Gros Sophie Bahi francois clauss William Bacon Philippe Clézardin Nadia Benkirane-Jessel Florence Fioretti Centre National de la Recherche Scientifique(CNRS) UMRFacultéde Pharmacie de l’Universitéde Strasbourg(UdS)IllkirchFrance Institut National de la Santéet de la Recherche Médicale(INSERM) Osteoarticular and Dental Regenerative NanomedicineUMRFacultéde Médecine de l’Universitéde Strasbourg and FMTSStrasbourgFrance Facultéde Chirurgie Dentaire de l’Universitéde Strasbourg(UdS) StrasbourgFrance Hopitaux Universitaires de Strasbourg StrasbourgFrance Institut National de la Santéet de la Recherche Médicale(INSERM) UMRFacultéde Médecine Laennec de l’UniversitéClaude Bernard Lyon 1LyonFrance

Nanomechanical heterogeneity is expected to have an effect on elasticity, injury and bone remodelling. In normal bone, we have two types of cells (osteoclasts and osteoblasts) working together to maintain existing bone. Bone cancers can produce factors that make the osteoclasts work harder. This means that more bone is destroyed than rebuilt, and leads to weakening of the affected bone. We report here the first demonstration of the nanoscale stiffness distribution in bone metastases before and after treatment of animals with the bisphosphonate Risedronate, a drug which is currently used for the treatment of bone metastases in patients with advanced cancers. The strategy used here is applicable to a wide class of biological tissues and may serve as a new reflection for biologically inspired scaffolds technologies.

关键词： Bone Metastasis Stiffness Risedronate

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