Targeting interleukin-6 pathways in giant cell arteritis management: A narrative review of evidence.

Abstract

Giant cell arteritis (GCA) is a chronic inflammatory vasculitis with a significant impact on vascular and patient health. It may present with non-specific symptoms and can lead to severe complications if not managed effectively. This narrative review explores the treatment of GCA with interleukin-6 (IL-6) pathway inhibitors, focusing on key studies from selected databases published between 2018 and 2024. The findings reveal that the current treatment primarily involves glucocorticoids (GCs), but their long-term use is associated with adverse effects. Targeting the IL-6 pathway offers therapeutic benefits by reducing inflammation and sparing GC use. Tocilizumab, a humanized immunoglobulin G1κ monoclonal antibody that blocks the IL-6 receptor, has demonstrated efficacy in achieving sustained remission and improving quality of life in people with GCA. However, challenges remain in understanding the optimal duration of therapy, managing relapse upon discontinuation, and addressing long-term structural vascular outcomes. Additional research is needed to further elucidate the complex pathogenesis of GCA and to optimize treatment strategies to achieve sustained remission both clinically and histologically while minimizing adverse effects. This review provides a comprehensive overview of the evidence of IL-6 inhibition in GCA management, highlighting both its therapeutic benefits and the challenges associated with its use.