Abstract
Avacopan is a small-molecule complement 5a receptor (CD88) antagonist recently approved by the United States Food and Drug Administration as an adjunct therapy in combination with immunosuppressants and corticosteroids for treatment of ANCA-vasculitis. The selective ability of avacopan to inhibit the C5a receptor blocks neutrophil chemoattraction, activation, and adhesion while maintaining other beneficial complement pathways. Therefore, avacopan's unique selective property provides a breakthrough treatment for ANCA- vasculitis given that current therapies of corticosteroid treatment often lead to a decreased quality of life and a possible relapse. Clinical trials prove that avacopan is an excellent adjunctive treatment option, although it is not approved for the primary treatment of ANCA-vasculitis at this time. Initial clinical trials show substantial promise for avacopan, but additional studies with a longer duration will be needed to test for its durability and safety.
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