AHR and diffuse large B-cell lymphoma: In diffuse large B-cell lymphoma (DLBCL) cell lines, AhR expression was restored not only by the DNA methyl transferase inhibitor 5- Aza-2′ deoxycytidine (AZA), but also by the histone deacetylase inhibitor Trichostatin A, indicating that differences in histone acetylation may also alter AhR expression (Ding et al., 2015).