Anti-Inflammatory Agents, Non-Steroidal/pharmacology; Boehmeria/chemistry; Inflammation Mediators/metabolism; Macrophages/drug effects; Mitogen-Activated Protein Kinase 8/antagonists & inhibitors; Plant Extracts/pharmacology; p38 Mitogen-Activated Protein Kinases/antagonists & inhibitors; Animals; Anti-Inflammatory Agents, Non-Steroidal/analysis; Anti-Inflammatory Agents, Non-Steroidal/chemistry; Cell Line, Transformed; Cinnamates/analysis; Cinnamates/pharmacology; Down-Regulation/drug effects; Ethnopharmacology; Flavonoids/analysis; Flavonoids/pharmacology; Glucosides/analysis; Glucosides/pharmacology; Lipopolysaccharides; Macrophages/immunology; Macrophages/metabolism; Medicine, Korean Traditional; Mice; Mitogen-Activated Protein Kinase 8/metabolism; Nitric Oxide Synthase Type II/antagonists & inhibitors; Nitric Oxide Synthase Type II/metabolism; Phosphorylation/drug effects; Plant Extracts/chemistry; Plant Leaves/chemistry; Protein Processing, Post-Translational/drug effects; Republic of Korea; p38 Mitogen-Activated Protein Kinases/metabolism