AI Article Synopsis

  • Avacopan is an oral medication that acts as a C5a receptor antagonist and is effective in treating microscopic polyangiitis by inhibiting the activation of neutrophils.
  • A patient case showed that despite high-dose steroids and azathioprine not reducing myeloperoxidase antineutrophil cytoplasmic antibodies (MPO-ANCA), adding avacopan lowered these antibody levels.
  • The findings suggest avacopan might help in decreasing MPO-ANCA and improving ANCA-associated vasculitis, but more research with larger studies is needed to confirm these effects.

Article Abstract

Avacopan, an orally administered C5a receptor antagonist, is effective in microscopic polyangiitis via the inhibition of neutrophil priming induced by C5a. However, the exact effect of avacopan on the production of myeloperoxidase antineutrophil cytoplasmic antibody (MPO-ANCA) is yet to be clearly established. This report presents a microscopic polyangiitis patient without major organ damage where high levels of MPO-ANCA persisted with high-dose steroid therapy and azathioprine, but the addition of avacopan led to a reduction in MPO-ANCA titres. The present case implies that avacopan-mediated inhibition of C5a may lead to a reduction in MPO-ANCA levels, thereby potentially ameliorating the pathophysiology of ANCA-associated vasculitis. Nevertheless, the impact of avacopan on MPO-ANCA production cannot be asserted solely based on this report; therefore, further examination is necessary through subgroup analysis using data from larger-scale studies.

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Source
http://dx.doi.org/10.1093/mrcr/rxae016DOI Listing

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