TP53 and diffuse large B-cell lymphoma: All these data indicate that the methylation of the studied genes may be one of the important mechanisms of disrupting the functioning of such p53-responsive oncosupressive microRNAs, as hsa-miR-203, hsa-mir-129, hsa-miR-34a, hsa-miR-34b and hsa-miR-34c in DLBCL.