“…Based on this background, we assembled this special issue for International Immunopharmacology to describe the molecular aspects of the mechanisms of action of biological agents, discuss the adverse effects and limitations of established therapies and analyze the alternative approaches in autoimmune diseases, such as RA, SLE, Sjögren's Syndrome (SS), and vasculitis. In this special issue, Roccatello and coworkers [1] summarized the biologic agents currently available to treat RA, mainly focusing on non anti-TNF agents. Lutalo PM and D'Cruz DP [2] gave an update on the use of biologics in ANCA-associated vasculitis (AAV) and provided prospective biologic therapies that might be used in the management of AAV the in future.…”