Effect of two series of isoindolines over HDAC8 activity and expression

This work describes the effect of two series of isoindolines 1(a–g) and 2(a–g) on histone deacetylase 8 (HDAC8) activity by theoretical study (docking method) and experimental assays using a commercial kit, as well as the effect of isoindolines on HDAC8 expression on HeLa cells. The theoretical study show interactions of the isoindolines with two HDAC8 deep pockets; these binding sites were compared to those of HDAC8 inhibitor, Trichostatin A. It was demonstrated experimentally that tested compounds can act as HDAC8 inhibitors. The expression of HDAC8 by Western blot analysis, remain unchanged in HeLa cells treated with the isoindolines with the exception of compound 2b which seems to increase HDAC8 expression. In conclusion, isoindolines act as HDAC8 inhibitors because they do not decrease the protein expression.