Among the potential problems connected with the use of BETi in therapy is the finding that selected drugs (e.g., JQ1 or OTX015) have been shown to induce significant accumulation of BRD4 protein in Burkitt’s lymphoma cell lines; in addition, similar observations have been reported in lung and prostate cancer cell lines [43, 56]. The gene discussed is BRD4; the disease is prostate carcinoma.