Objective To investigate the expression of ubiquitin-specifi c protease 22(USP22) in bone marrow cells in patients with acute leukemia(AL) and its clinical signifi cance. Methods Real-time quantitative PCR(qPCR) and Western blot were used to detect mRNA and protein expression levels of USP22 in Jurkat, HL-60, K562, molt-4 and NB4 cell lines and bone marrow mononuclear cells from AL patients and negative control patients, respectively. Results USP22 expression was found in Jurkat, HL-60, K562, molt-4 and NB4...