Journal
ARCHIVES OF ORAL BIOLOGY
Volume 57, Issue 5, Pages 519-524Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.archoralbio.2011.09.018
Keywords
Interleukin-1 receptor antagonist (IL-1Ra); Interleukin-1 (IL-1); Mechanical loading; Orthodontic tooth movement
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Funding
- Fundacao de Amparo a Pesquisas do Estado de Minas Gerais (FAPEMIG, Brazil)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES, Brazil)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq, Brazil)
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Objective: Orthodontic tooth movement (OTM) is achieved by alveolar bone remodelling induced by mechanical loading. Whilst interleukin-1 (IL-1) is directly involved in OTM, the role of interleukin-1 receptor antagonist (IL-1Ra), a naturally occurring IL-1 antagonist, is not completely defined. Therefore, the aim of this study was to investigate the effects of IL-1Ra on OTM. Methods: An orthodontic appliance was placed in C57BL6 mice treated with vehicle or IL-1Ra (10 mg/kg/day). OTM and TRAP-positive osteoclasts were evaluated after 12 days of mechanical loading and the levels of cytokines on periodontal tissues were analysed by ELISA after 12 and 72 h. Results: Mice treated with IL-1Ra showed diminished OTM and decreased numbers of TRAP-positive osteoclasts. In line with this, lower levels of IL-1 beta and TNF-alpha, and higher levels of IL-10, were observed on periodontal tissues of IL-1Ra-treated mice in relation to the vehicle-treated group. Conclusion: The present study suggests that IL-1Ra downregulates OTM, probably by its anti-inflammatory actions. (C) 2011 Elsevier Ltd. All rights reserved.
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