- Valproate inhibition of histone deacetylase 2 affects differentiation and decreases proliferation of endometrial stromal sarcoma cells. Hrzenjak, A., Moinfar, F., Kremser, M.L., Strohmeier, B., Staber, P.B., Zatloukal, K., Denk, H. Mol. Cancer Ther. (2006)