RESUMO
【Objective】 To investigate the expression level of B7-H6 in peripheral blood and bone marrow of patient with chronic myeloid leukemia (CML), and to analyze its association with clinicopathological characteristics and prognosis. 【Methods】 A total of 120 CML patients from January 2010 to May 2013 were selected as study subjects. The expression of B7-H6 mRNA in CML peripheral blood and bone marrow pre- and 3-, 6-, 12-month-posttreatment was detected by quantitative real time PCR, and its correlation between prognosis and clinicopathological factors was analyzed. 【Results】 The expression level of B7-H6 mRNA in the PB, BMMCs of CML patients was lower than that of the normal population (P0.1%(P<0.0001) or without CCR (P<0.001). The expression level of B7-H6 in BMMCs was negatively correlated with the BCR-ABL1/ABL level (r=–0.260, P<0.05). Signifiant difference in PFS was observed between patients with high expression level of B7-H6 (not reached, HR: 0.06, 95% CI =0.03-0.37) and low expression level (81 months, HR: 15.58, 95% CI =2.68-30.23) in BM (P<0.05). 【Conclusion】 The low expression of the B7-H6 gene in CML is correlated with BCR-ABL1 copy number and responsiveness to treatment, and monitoring of B7-H6 expression may be used to evaluate CML prognosis, progression and treatment efficacy.