热休克蛋白70及pim-1基因在白血病骨髓单个核细胞的表达特点及临床意义

Expression Characteristics of Heat Shock Protein 70 and pim-1 Gene in Bone Marrow Mononuclear Cells from Leukemia Patients and Their Clinical Significance

本研究观察热休克蛋白70(HSP70)基因/蛋白,pim-1基因在白血病患者骨髓单个核细胞(BMMNC)中的表达,确定其表达是否与白血病类型、肿瘤负荷程度及预后有规律性联系。用RT-PCR技术检测40例白血病患者和10例对照BMMNC HSP70 mRNA及pim-1 mRNA的表达并半定量;用Western blot检测34例白血病患者和10例对照BMMNC HSP70蛋白表达并半定量,并结合白血病类型、肿瘤负荷程度及对治疗的反应进行分析。结果表明:白血病组与对照组BMMNC均存在HSP70 mRNA和蛋白表达,在白血病组显著高于对照组;CML组、AML组HSP70 mRNA/蛋白表达的平均ODR值均显著高于ALL组;肿瘤重度负荷的急性白血病患者组HSP70 mRNA/蛋白表达显著高于肿瘤轻度负荷组;白血病患者化疗后HSP70 mRNA/蛋白表达显著高于化疗前;白血病组及对照组BMMNC均表达pim-1mRNA,在白血病组显著高于对照组;ALL组pim-1 mRNA表达显著高于AML组和CML组;经相关性分析,白血病患者HSP70 mRNA表达与pim-1 mRNA表达成正相关(r=0.327,p<0.05)。结论:白血病患者BMMNC存在HSP70、pim-1高表达,其中pim-1 mRNA表达与HSP70 mRNA表达呈正相关,HSP70与pim-1基因/蛋白过表达亦与白血病肿瘤负荷程度有关。

This study was aimed to investigate the expression characteristics of HSP70 protein /mRNA, pim-1 mRNA in bone marrow mononuclear cells from leukemia patients, and to clarify whether these changes are related to leukemia type, tumor burden of leukemia, therapeutic reaction and prognosis. HSP70 mRNA and pim-1 mRNA in BMMNCs were detected with semi-quantitive RT-PCR in 40 leukemia patients and 10 controls. HSP70 protein in BMMNCs was assayed with Western blot in 34 leukemia patients and 10 controls. Relation of HSP70 and pim-1 expression with leukemia classification, the degree of tumor burden and therapeutic reacdon were analyzed. The results showed that the BMMNCs from both leukemia patients and controls expressed HSP70 protein/mRNA. The mean ODR value of HSP70 mRNA in BMMNCs from leukemia patients was significantly higher than that of the controls; the mean ODR value of HSP70 protein /mRNA in acute myeloid leukemia and chronic myeloid leukemia patients both were significantly higher than that of acute lymphocytic leukemia patients; the mean ODR value of HSP70 protein/mRNA in acute leukemia patients with high-degree tumor burden was higher than that of the patients with low-degree tumor burden; the mean ODR value of HSP70 protein/mRNA in the patients after chemotherapy was significantly higher than that of the patients before chemotherapy; the BMMNCs from both leukemia patients and controls expressed pim-1 mRNA. The mean ODR value of pim-I mRNA in BMMNCs from leukemia patients was significantly higher than that of the controls; the mean ODR value of pim-1 mRNA in BMMNCs for Acute lymphocytic leukemia patients was significantly higher than that of the patients suffered from acute myloid leukemia and chronic granulocytic leukemia; there was a positive relationship between pim-1 mRNA and HSP70 mRNA expressions in leukemia patients（p 〈 0.05 ）. It is concluded that there are high expressions of HSP70 and pim-1 in leukemia and their positive correlation is shown. The over-expressions of HSP70 and pim-1 protein/mRNA are related to tumor burden in leukemia patients.