Figure 1.

Anti-dsDNA antibodies bind to HMC. a HMCs were incubated with anti-dsDNA antibodies or control IgG, washed and stained with FITC conjugated anti-human IgG, with or without Fc receptor blocking. Flow cytometry analysis showed that the binding of anti-dsDNA antibodies to HMCs was not inhibited by Fc receptor blocking. b HMCs were incubated with anti-dsDNA antibodies or control IgG, washed and stained with HRP-conjugated anti-human IgG, with or without Fc receptor blocking. The binding of anti-dsDNA antibodies to HMCs was measured by cellular ELISA. No significant decrease in binding was observed after Fc receptor blocking. All experiments were repeated for three times. Data was expressed as mean ± SD, *P < 0.05 versus control IgG. CTL Control, anti-dsDNA Abs anti-dsDNA antibodies, and FcR Fc receptor.