Plasma antibody levels to P. gingivalis in immunized mice.

*C57BL/6 female mice (n = 8 per group) were immunized with heat-killed P. gingivalis (Pg) (ATCC33277) and controls received saline. Plasma IgM and IgG to Pg before (pre) and after immunization (post) were determined with chemiluminescence immunoassay. Values are mean ± SD. RLU, relative light units.†LDLR−/− mice were immunized with killed P. gingivalis (n = 7 in Pg-immunized and n = 8 in PBS-controls) and plasma IgM and IgG to Pg before (pre), after the second booster immunization (immunized) and after the high fat diet (HFD) were determined. Values are mean ± SD. RLU, relative light units.