title: ERK inhibitors as a potential new therapy for rheumatoid arthritis.
abstract: Rheumatoid arthritis (RA), a chronic and systemic autoimmune disease that leads to progressive articular destruction, is evoked by the concerted action of RA-related cells, such as T cells, synovial fibroblasts and macrophages. Although anticytokine biologics block the intercellular signal transduction of these RA-related cells and thereby exert a strong ameliorative effect on RA, there still remains a significant percentage of nonresponsive patients. In addition to these biologics that disrupt specific intercellular signals, extracellular signal-regulated kinase (ERK) inhibitors, which are believed to target the intracellular signals common to the diverse RA-related cells, are also used as a treatment for RA patients, including those who are nonresponsive to the anticytokine therapies. Recently, potent and selective inhibitors for ERK with the co-crystal structures have been reported. FR180204, an ERK inhibitor, has been shown to be effective against mouse collagen-induced arthritis, a representative animal model of RA. This compound also suppresses the antigen-specific activation of T cells, which play a central role in the initiation and progress of the disease. Information obtained from the co-crystal structures would contribute to the improvement of the chemical characteristics. Thus, with the discovery of new potential chemical entities, ERK inhibitors may emerge as a new therapeutic approach for the treatment of RA.
authors.affiliation: Astellas Pharma Inc., Tsukuba, Ibaraki, Japan. makoto.ohori@jp.astellas.com
authors.forename: Makoto
authors.initials: M
authors.lastname: Ohori
mesh_terms: D000818:Animals; D018501:Antirheumatic Agents / Q000627:therapeutic use*; D001172:Arthritis, Rheumatoid / Q000188:drug therapy*; D048049:Extracellular Signal-Regulated MAP Kinases / Q000037:antagonists & inhibitors*; D006801:Humans; D007155:Immunologic Factors / Q000627:therapeutic use*; D051379:Mice
chemical_list: D018501:Antirheumatic Agents; D007155:Immunologic Factors; D048049:Extracellular Signal-Regulated MAP Kinases