Figure 5
From: C-reactive protein (CRP) recognizes uric acid crystals and recruits proteases C1 and MASP1
Co-localization of CRP and C3 on opsonized MSU crystals. (a) Confocal microscopy of MSU crystals (lot 1), which were incubated for 30 min at 37 °C with human serum (CRP 0.3 µg/ml) with or without addition of 40 µg/ml purified CRP, washed extensively and stained with rabbit anti-CRP plus anti rabbit AF568 (red) and mouse anti-C3/C3b plus anti mouse AF488 (green). DIC = digital interference contrast; scale-bar = 40 µm. (b) MSU crystals lot 2 were incubated in human serum (CRP 0.6 µg/ml) with or without addition of 40 µg/ml purified CRP, stained and microscopically detected as in a.
