HDAC3 and diffuse large B-cell lymphoma: However, in follicular lymphoma (FL) and diffuse large B cell lymphoma (DLBCL), CREBBP mutations disable its acetylation and result in unopposed deacetylation by the BCL6-SMRT-HDAC3 complex at enhancers of B cell signal transduction and immune response genes, thus promoting lymphomagenesis [72, 73].