RESUMO
OBJECTIVE@#To investigate the expression and clinical significance of PD-L1 and microRNA-138-5p in the peripheral blood mononuclear cells of patients with acute myeloid leukemia.@*METHODS@#The SYBR GreenⅠreal-time PCR was used to detect the expression levels of PD-L1 mRNA and miR-138 in 20 cases of primary AML, 9 cases of relapsed/refractory AML and 8 cases of complete remission. The samples of peripheral blood of 20 healthy peoples were used as controls.@*RESULTS@#The expression levels of PD-L1 in both the primary AML and the relapsed/refractory AML groups were significantly higher than those in the healthy control group (P0.05). and there was a negative correlation between PD-L1 mRNA and miR-138 in primary AML patients (P<0.05).@*CONCLUSION@#The expression of PD-L1 increases and the expression of miR-138 down-regulates in PBMNCs of AML patients, furthermore, both correlate each other.