Romidepsin

Romidepsin (FK228) is a structurally unique, potent HDAC1 and HDAC2 inhibitor with IC50 of 36 nM and 47 nM, respectively. Romidepsin inhibits the growth of U-937, K562, and CCRF-CEM cells with IC50 of 5.92 nM, 8.36 nM, and 6.95 nM, respectively. Romidepsin exhibits concentration-dependent cytotoxicity against a panel of mantle cell lymphoma (MCL) cell lines. FK228 (Romidepsin) treatment potently inhibits the neovascularization of chick embryo and that of adult mice in the Matrigel plug assay. FK228(Romidepsin) is currently in a Phase I study in treating patients with lymphoma, chronic lymphocytic leukemia, or solid tumors with liver dysfunction.