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An orally available inhibitor of the beta-isoform of protein kinase C (PKC), with potential immunosuppressive and antineoplastic activities. Upon oral administration, PKC-beta inhibitor MS-553 selectively binds to and inhibits PKC-beta, which prevents the activation of PKC-beta-mediated signaling pathways. This may lead to the induction of cell cycle arrest and apoptosis in susceptible tumor cells. PKC-beta, a serine/threonine protein kinase overexpressed in certain types of cancer cells, is involved in tumor cell differentiation, proliferation, invasion and survival. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C148422\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C148422\' NCI Thesaurus)
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