Bag3基因在慢性淋巴细胞白血病的表达及其与预后关系的研究

本研究旨在探索bag3基因在慢性淋巴细胞白血病(chronic lymphocytic leukemia,CLL)中的表达及与患者预后的关系。通过实时定量PCR技术,采用SYBR Green荧光染料法对46例CLL患者外周血标本bag3 mRNA表达水平进行相对定量检测,并分析CLL患者bag3基因异常表达和临床预后指标的相关性。结果表明,46例CLL患者bag3表达水平中位数为0.021(0.0007-1.124),明显高于正常人群[0.0025(0.0005-0.014)];耐药CLL患者的bag3表达水平明显高于治疗有效患者的bag3表达水平;bag3的表达与性别、年龄、淋巴细胞数、临床分期、IgVH基因突变、染色体异常、CD38、ZAP70无明显相关。结论:bag3基因在CLL中的表达水平明显高于正常人群,可能与白血病细胞耐药相关,而与CLL患者临床分期及临床常规预后因素无明显相关。

Bag3 Gene Expression in Chronic Lymphocytic Leukemia and Its Association with Patients' Prognosis

The aim of this study was to investigate bag3 gene expression in chronic lymphocytic leukemia （CLL） patients and its association with clinical prognosis. A total of 46 blood samples from untreated CLL patients were collected, SYBR Green-based real-time PCR was used to detect the bag3 mRNA expression, and its association with prognostic index was analyzed by statistical software. The results showed that the median values of bag3 level detected by real-time PCR in 46 CLL patients and normal controls were 0. 021 （0.0007 - 1. 124） and 0. 0025 （0.0005 -0.014） respectively, the former was significantly higher than the latter. The bag3 level in drug-resistant group was obviously higher as compared with the drug-responsive group. No association was found between bag3 expression and patient clinical baseline information （ gender and age） as well as established prognostic factors （ lymphocyte count, disease stage, IgVH mutation status, cytogenetics analysis and CD38, ZAP 70 expression ）. It is concluded that the bag3 expression in CLL patients is markedly higher than that in normal controls, while the high bag3 level in CML patients is probably related with drug resistance, but is not related with clinically established prognostic factors.