Improved therapeutic efficacy of a bifunctional anti-C5 mAb-FH SCR1-5 fusion protein over anti-C5 mAb in an accelerated mouse model of C3 glomerulopathy.

ABSTRACT: C3 glomerulopathy (C3G), a rare kidney disease caused by dysregulation of alternative pathway complement activation, is characterized by glomerular C3 deposition, proteinuria, crescentic glomerulonephritis, and renal failure. The anti-C5 monoclonal antibody (mAb) drug eculizumab has shown therapeutic effects in some but not all patients with C3G, and no approved therapy is currently available. Here, we developed and used a triple transgenic mouse model of fast progressing lethal C3G (FHm/mP-/-hFDKI/KI) to compare the therapeutic efficacy of a bifunctional anti-C5 mAb fused to a functional factor H (FH) fragment (short consensus repeat 1-5 [SCR1-5]) and the anti-C5 mAb itself. The new C3G mouse model is derived by humanizing factor D (hFDKI/KI) in a previously described FHm/mP-/- mouse that

SUBMITTER: Sato S 

PROVIDER: S-EPMC11841979 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature