Atherosclerosis/metabolism; Chemotaxis; Cyclic AMP Response Element-Binding Protein/metabolism; Interleukin-6/metabolism; Muscle, Smooth, Vascular/metabolism; Myocytes, Smooth Muscle/metabolism; Toll-Like Receptor 2/metabolism; Animals; Antibodies, Neutralizing/pharmacology; Atherosclerosis/genetics; Atherosclerosis/immunology; Atherosclerosis/pathology; Cell Proliferation; Cell Survival; Cells, Cultured; Chemotaxis/drug effects; Cyclic AMP Response Element-Binding Protein/genetics; Dose-Response Relationship, Drug; Interleukin-6/antagonists & inhibitors; Interleukin-6/genetics; Ligands; Lipopeptides/pharmacology; Mice; Mice, Inbred C57BL; Mice, Knockout; Mitogen-Activated Protein Kinase 1/antagonists & inhibitors; Mitogen-Activated Protein Kinase 1/metabolism; Mitogen-Activated Protein Kinase 3/antagonists & inhibitors; Mitogen-Activated Protein Kinase 3/metabolism; Muscle, Smooth, Vascular/drug effects; Muscle, Smooth, Vascular/immunology; Muscle, Smooth, Vascular/pathology; Myocytes, Smooth Muscle/drug effects; Myocytes, Smooth Muscle/immunology; Myocytes, Smooth Muscle/pathology; Neuropeptides/genetics; Neuropeptides/metabolism; Phosphorylation; Promoter Regions, Genetic; Protein Kinase Inhibitors/pharmacology; RNA Interference; Signal Transduction; Stress Fibers/metabolism; Time Factors; Toll-Like Receptor 2/agonists; Toll-Like Receptor 2/deficiency; Toll-Like Receptor 2/genetics; Transfection; p38 Mitogen-Activated Protein Kinases/antagonists & inhibitors; p38 Mitogen-Activated Protein Kinases/metabolism; rac GTP-Binding Proteins/genetics; rac GTP-Binding Proteins/metabolism; rac1 GTP-Binding Protein