C3 Glomerulopathy: Novel Treatment Paradigms.

C3 glomerulopathy (C3G) is diagnosed by kidney biopsy, with immunofluorescence showing isolated or dominant C3 staining, indicating hyperactivity of the alternative complement pathway as the key driver of glomerular injury. Therefore, the lesion is defined by its complement-mediated pathogenesis as much as its histological pattern. As a bevy of complement-targeting agents are moving through development and clinical trials, we review the evolution in treatment paradigms for C3G. Here we survey the limited efficacy of noncomplement targeting therapy before focusing on the work being done on targeting various components of the complement cascade in aiming to provide disease-specific therapy.