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The dimesylate salt form of LY2228820, a tri-substituted imidazole derivative and orally available, p38 mitogen-activated protein kinase (MAPK) inhibitor with potential anti-inflammatory and antineoplastic activities. Upon administration, LY2228820 inhibits the activity of p38, particularly the alpha and beta isoforms, thereby inhibiting MAPKAPK2 phosphorylation and preventing p38 MAPK-mediated signaling. This may inhibit the production of a variety of cytokines involved in inflammation, cellular proliferation and angiogenesis such as tumor necrosis factor alpha (TNFa), interleukin (IL)-1, -6 and -8, vascular endothelial growth factor, and macrophage inflammatory protein-1 alpha. Ultimately this induces apoptosis and reduces tumor cell proliferation. In addition, inhibition of the p38 MAPK pathway by LY2228820 increases the antineoplastic activity of certain chemotherapeutic agents. p38 MAPK, a serine/threonine protein kinase that is often upregulated in cancer cells, plays a crucial role in tumor cell proliferation, angiogenesis and metastasis. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C105853\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C105853\' NCI Thesaurus)
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