Dinoprostone/immunology; Immune Tolerance/radiation effects; Receptors, Prostaglandin E, EP4 Subtype/antagonists & inhibitors; Receptors, Prostaglandin E, EP4 Subtype/immunology; Ultraviolet Rays/adverse effects; Animals; Anti-Inflammatory Agents, Non-Steroidal/pharmacology; Dendritic Cells/immunology; Dendritic Cells/metabolism; Dinoprostone/genetics; Dinoprostone/metabolism; Female; Gene Expression Regulation/drug effects; Gene Expression Regulation/genetics; Gene Expression Regulation/immunology; Gene Expression Regulation/radiation effects; Immune Tolerance/drug effects; Immune Tolerance/genetics; Immune Tolerance/immunology; Indomethacin/pharmacology; Lymph Nodes/immunology; Lymph Nodes/metabolism; Mice; Mice, Transgenic; RANK Ligand/biosynthesis; RANK Ligand/genetics; RANK Ligand/immunology; Receptors, Prostaglandin E, EP4 Subtype/genetics; Receptors, Prostaglandin E, EP4 Subtype/metabolism; T-Lymphocytes, Regulatory/immunology; T-Lymphocytes, Regulatory/metabolism