Monoclinic calcium pyrophosphate dihydrate (m-CPPD) crystals were synthesized and characterized using physical methods, IgG binding to m-CPPD crystals was quantitated, and the effect of IgG or plasma opsonization on m-CPPD-induced neutrophil activation was determined. Adsorption of IgG to crystals was measured using fluorescent-labelled FITC-IgG. Neutrophil activation by uncoated m-CPPD and crystals precoated with IgG or plasma was measured using luminol-enhanced chemiluminescence, superoxide anion generation, and myeloperoxidase release. m-CPPD bound small (compared to triclinic CPPD) but significant amounts of IgG and induced a strong activation of neutrophils at low concentrations of crystals. The rate and extent of chemiluminescence, superoxide anion production, and degranulation was not affected by precoating m-CPPD crystals with IgG during the early phase of neutrophil responses, but was inhibited by the precoating of crystals with plasma.
CITATION STYLE
Winternitz, C. I., Jackson, J. K., & Burt, H. M. (1996). The interaction of monoclinic calcium pyrophosphate dihydrate crystals with neutrophils. Rheumatology International, 16(3), 101–107. https://doi.org/10.1007/BF01409981
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