MASP1 and retinal degeneration: To determine the roles of MASP-1 and/or MASP-3 in NaIO3-induced retinal degeneration, morphological change of the RPE and retina was assessed by H&E staining using retinal cross sections of WT, MASP-1-/-, MASP-3-/-, and MASP-1/3-/- mice 7 d after intravenous NaIO3 injection.