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Although glucocorticoids (GC) remain the corner stone of giant cell arteritis (GCA) treatment, GC-sparing strategies are needed because GC are responsible for side effects.1 Recent advances in the pathophysiology of GCA showed that CD4+ T cells are recruited in the arterial wall and polarised into Th1 and Th17 cells,2 3 the latter being sensitive to GC-mediated suppression, whereas Th1 response persists in GC-treated patients,2 which triggers the recruitment of macrophages4 and could be implicated in the occurrence of relapses when GC are tapered. Interleukin (IL)-12 and IL-23 are two cytokines involved in Th1 and Th17 polarisations, respectively.5 These two cytokines share a common subunit (p40), which allows ustekinumab, a humanised anti-p40 monoclonal antibody, to target both IL-12 and IL-23 pathways, thus disrupting in theory Th1 and Th17 immune responses.6 Recently, an open-label study reported on the efficacy and safety of …
Contributors MS and TG did the experiments and collected data. SB included the patient. MS and BB wrote the manuscript.
Competing interests None declared.
Patient consent Obtained
Ethics approval The Institutional Review Board and the Ethics Committee of Dijon University Hospital.
Provenance and peer review Not commissioned; internally peer reviewed.
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