In vivo administration of ascophyllan induces spleen conventional DC (cDC) activation. C57BL/6 mice were injected intravenously (i.v.) with 50 mg/kg ascophyllan or 50 mg/kg fucoidan for 24 h. (A) Percentage of lineage−CD11c+ cDCs was analyzed by flow cytometry (left panels). Absolute numbers of live, lineage−CD11c+ cells were shown (right panel); (B) Expression levels of CD40, CD80, CD86, MHC class I and MHC class II were measured by flow cytometry; (C) Percentage of lineage−CD11c+CD8α+ or lineage−CD11c+CD8α− cDCs was analyzed on a flow cytometry (left panels). Absolute numbers of live, lineage−CD11c+CD8α+ cells (middle panel) or lineage−CD11c+CD8α− cells (right panel) were shown (right panel); (D) Expression level of CD40, CD80, CD86, MHC class I and MHC class II were measured by flow cytometry. All data are representative of or the average of analyses of six independent samples.