Three pathways have now been described in the complement system — the classic, alternative and lectin. A fourth, lytic pathway is added by some authors for membrane attack complex.

In the alternative pathway, C3b binds to Factor B. Factor D releases Factor Ba from Factor B bound to C3b. The complex of C3b (2)Bb is a protease which cleaves C5 into C5b and C5a. C5 convertase is ...

The alternative complement pathway plays a key role in the pathogenesis of IgA nephropathy. Iptacopan specifically binds to factor B and inhibits the alternative pathway. In this phase 3, double ...

BCX9930, an Oral Factor D Inhibitor, Suppresses Complement Alternative Pathway C3 Convertase Activity in vitro, and in Patients with Complement 3 Glomerulopathy (Poster #80); Sunday, August 28 ...