Effects of tofacitinib in early arthritis-induced bone loss in an adjuvant-induced arthritis rat model.
Rheumatology (Oxford)
; 57(8): 1461-1471, 2018 08 01.
Article
em En
| MEDLINE
| ID: mdl-28968875
ABSTRACT
Objectives:
The main goal of this work was to analyse how treatment intervention with tofacitinib prevents the early disturbances of bone structure and mechanics in the rat model of adjuvant-induced arthritis. This is the first study to access the impact of tofacitinib on the skeletal bone effects of inflammation.Methods:
Fifty Wistar rats with adjuvant-induced arthritis were randomly housed in experimental groups, as follows non-arthritic healthy group (n = 20); arthritic non-treated group (n = 20); and 10 animals undergoing tofacitinib treatment. Rats were monitored during 22 days after disease induction for the inflammatory score, ankle perimeter and body weight. Healthy non-arthritic rats were used as controls for comparison. After 22 days of disease progression, rats were killed and bone samples collected for histology, micro-CT, three-point bending and nanoindentation analysis. Blood samples were also collected for quantification of bone turnover markers and systemic cytokines.Results:
At the tissue level, measured by nanoindentation, tofacitinib increased bone cortical and trabecular hardness. However, micro-CT and three-point bending tests revealed that tofacitinib did not reverse the effects of arthritis on the cortical and trabecular bone structure and on mechanical properties.Conclusion:
Possible reasons for these observations might be related to the mechanism of action of tofacitinib, which leads to direct interactions with bone metabolism, and/or to the kinetics of its bone effects, which might need longer exposure.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Piperidinas
/
Artrite
/
Pirimidinas
/
Pirróis
/
Reabsorção Óssea
/
Remodelação Óssea
Tipo de estudo:
Diagnostic_studies
/
Etiology_studies
/
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Rheumatology (Oxford)
Assunto da revista:
REUMATOLOGIA
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Portugal