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. 2020 Apr 14;10:6391. doi: 10.1038/s41598-020-63318-8

Figure 4.

Figure 4

CRP predominantly recognizes the edges or specific faces of MSU crystals. (a) MSU crystals (lot 2) were incubated for 30 min at 37 °C with human serum (CRP 0.2 µg/ml) with 30 µg/ml recombinant CRP added. CRP binding was analyzed using CRP antibody and anti-rabbit-AlexaFluor488. AlexaFluor488-fluorescence of the crystals was detected by fluorescence microscopy; scale bar = 40 µm. (b) MSU crystals (lot 2) were incubated as described in a in 30 µg/ml CRP-containing HBSS 5% BSA with 30 µg/ml recombinant CRP added. Microscopic detection of bound CRP performed as in a. (c) t-CPPD (self-made) was incubated in HBSS 5% BSA with 30 µg/ml recombinant CRP added as described in b. Microscopic detection of bound CRP performed as in a. Each experiment is representative of at least 2 independent experiments.