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  • Title: Novel Therapies for ANCA-associated Vasculitis.
    Author: Monti S, Brandolino F, Milanesi A, Xoxi B, Delvino P, Montecucco C.
    Journal: Curr Rheumatol Rep; 2021 Apr 28; 23(6):38. PubMed ID: 33909172.
    Abstract:
    PURPOSE OF REVIEW: The purpose of this review is to discuss the most recent evidence on the treatment innovations and future prospective in the management of anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitides (AAVs). RECENT FINDINGS: In AAV, a growing body of research is available on novel treatment options for remission induction and to clarify some uncertainties concerning the optimal use of available drugs. Efforts are being made to reduce the toxicity associated with high-dose, prolonged glucocorticoids (GC) regimens. Despite major advances in the prognosis of AAV, relapses are still common and the intensity and duration of remission treatment constitute a great challenge in the management of these chronic conditions. A paradigm shift in practice in the management of AAV is being supported by recent evidence suggesting the comparable efficacy and improved safety profile of schemes with a reduced dose of GC for the induction and maintenance of remission in patients with severe granulomatosis with polyangiitis (GPA) or microscopic polyangiitis (MPA). Moreover, recent appraisal of pathogenetic mechanisms, including complement activation pathways, has introduced the revolutionary concept of an alternative to GC, such as avacopan. Plasma exchange failed to prevent end-stage renal disease and mortality in patients with severe renal involvement or pulmonary haemorrhage according to a large multicentre randomised trial. Intensified immunosuppressive strategies for patients with life-threatening manifestations, including the combination of rituximab (RTX) with cyclophosphamide (CYC) have revealed promising preliminary data. New evidence for the use of alternative immunosuppressive agents (e.g. mycophenolate mofetil or abatacept) for the induction of remission in patients with non-severe disease is emerging. Several studies have been recently published, or are ongoing, to assess the optimal strategy and duration of maintenance of remission with the available treatment options (GC, azathioprine, and RTX). Preliminary evidence supports the superiority of a more prolonged course of maintenance treatment. The management of refractory or relapsing eosinophilic granulomatosis with polyangiitis (EGPA) has been improved by the recent demonstration of efficacy and safety of an interleukin-5 inhibitor, mepolizumab. Ongoing randomised studies will clarify the role of RTX in patients with severe manifestations of EGPA.
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