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Giant cell arteritis (GCA) is the most common form of systemic vasculitis.1 Glucocorticoids are the mainstay of therapy, required in high doses for prolonged periods, with consequent serious complications in 86% of patients.2 There is a critical unmet need for a proven safe and effective immunosuppressive therapy in GCA, as agents such as methotrexate and infliximab have shown disappointing results in GCA.3 ,4 Interleukins 12 (IL-12) and 23 (IL-23) are implicated in Th1 and Th17 responses, respectively, both inflammatory pathways relevant to GCA pathogenesis.5 ,6 A recent case series reported the use of ustekinumab in three patients with Takayasu arteritis.7 The aim of this study was to evaluate the glucocorticoid-sparing efficacy of ustekinumab, an IL-12/IL-23-blocking monoclonal antibody, in patients with refractory GCA.
Patients with GCA attending our centre are enrolled in a prospective registry and managed according to standardised …
Footnotes
Contributors RC, LO and ESM conceived the study. RC performed the data analysis. All authors critically appraised the manuscript and approved the final version.
Competing interests None declared.
Patient consent Obtained.
Ethics approval St. Vincent's University Hospital Ethics Committee.
Provenance and peer review Not commissioned; externally peer reviewed.
Data sharing statement Data used in this study are held in Bone and Joint Unit, St. Vincent's University Hospital, Dublin, Ireland under the custody of EM and can be made available on request.