Dendritic polyglycerol sulfate (dPGS) treatment in wild type mice decreased the severity of myositis. dPGS was injected intradermally for 11 consecutive days, beginning 3 days after immunization with C protein. Mice were sacrificed at day 14 after immunization and muscle tissues were harvested. A, Representative images of muscle inflammation with hematoxylin and eosin (HE) staining in wild type mice treated with dPGS and those treated with control. B-C, Histological score and the area of muscle fiber necrosis in each mouse group. D, Numbers of CD4+ and CD8+ T cells on day 14. Bars show the mean ± SEM. These results represent those obtained with 8-10 mice of each genotype. *p < 0.05. A, Original magnification: ×100 (upper panels); ×400 (lower panels).