STAT3 and diffuse large B-cell lymphoma: They showed that HDAC3 is aberrantly co-expressed with pSTAT3 Tyr705 in DLBCL tumor samples but not in normal blood B-cells and that HDAC3 complexed with STAT3 in pSTAT3 Tyr705-positive DLBCL cell lines (i.e., Ly3 and DHL2).