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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Rheumatoid Arthritis Exacerbates the Severity of Osteonecrosis of the Jaws (ONJ) in Mice. A Randomized, Prospective, Controlled Animal Study

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de Molon, Rafael Scaf ; Hsu, Chingyun ; Bezouglaia, Olga ; Dry, Sarah M. ; Pirih, Flavia Q. ; Soundia, Akrivoula ; Cunha, Fernando Queiroz ; Cirelli, Joni Augusto ; Aghaloo, Tara L. ; Tetradis, Sotirios
Número total de Autores: 10
Tipo de documento: Artigo Científico
Fonte: Journal of Bone and Mineral Research; v. 31, n. 8, p. 1596-1607, AUG 2016.
Citações Web of Science: 9

Rheumatoid arthritis (RA), an autoimmune inflammatory disorder, results in persistent synovitis with severe bone and cartilage destruction. Bisphosphonates (BPs) are often utilized in RA patients to reduce bone destruction and manage osteoporosis. However, BPs, especially at high doses, are associated with osteonecrosis of the jaw (ONJ). Here, utilizing previously published ONJ animal models, we are exploring interactions between RA and ONJ incidence and severity. DBA1/J mice were divided into four groups: control, zoledronic acid (ZA), collagen-induced arthritis (CIA), and CIA-ZA. Animals were pretreated with vehicle or ZA. Bovine collagen II emulsified in Freund's adjuvant was injected to induce arthritis (CIA) and the mandibular molar crowns were drilled to induce periapical disease. Vehicle or ZA treatment continued for 8 weeks. ONJ indices were measured by micro-CT (mCT) and histological examination of maxillae and mandibles. Arthritis development was assessed by visual scoring of paw swelling, and by mCT and histology of interphalangeal and knee joints. Maxillae and mandibles of control and CIA mice showed bone loss, periodontal ligament (PDL) space widening, lamina dura loss, and cortex thinning. ZA prevented these changes in both ZA and CIA-ZA groups. Epithelial to alveolar crest distance was increased in the control and CIA mice. This distance was preserved in ZA and CIA-ZA animals. Empty osteocytic lacunae and areas of osteonecrosis were present in ZA and CIA-ZA but more extensively in CIA-ZA animals, indicating more severe ONJ. CIA and CIA-ZA groups developed severe arthritis in the paws and knees. Interphalangeal and knee joints of CIA mice showed advanced bone destruction with cortical erosions and trabecular bone loss, and ZA treatment reduced these effects. Importantly, no osteonecrosis was noted adjacent to areas of articular inflammation in CIA-ZA mice. Our data suggest that ONJ burden was more pronounced in ZA treated CIA mice and that RA could be a risk factor for ONJ development. (C) 2016 American Society for Bone and Mineral Research. (AU)

Processo FAPESP: 12/09968-5 - Avaliação entre artrite reumatoide, doença periodontal e bifosfonatos para induzir osteonecrose maxilar em camundongos
Beneficiário:Rafael Scaf de Molon
Linha de fomento: Bolsas no Brasil - Doutorado