SCL基因在白血病患者骨髓基质细胞中的表达

为了解白血病干细胞 (stemcellleukemia ,SCL)基因在白血病骨髓基质细胞 (BMSC)及骨髓细胞中的表达情况 ,收集 18例急性髓系白血病 (AML)、17例慢性粒细胞白血病 (CML)、7例急性淋巴细胞白血病 (ALL)和 33例正常骨髓标本的单个核细胞 (MNC)进行体外长期培养 ,分别收集悬浮细胞 (造血细胞 )和扩增后的贴壁细胞 (BMSC)。运用RT PCR ELISA检测SCL基因的表达 ,分析表达率 ,并以管家基因 β2 微球蛋白 (β2 M)为内参照进行半定量分析。结果发现 ,SCL基因在AML(2 7.8% )和CML(11.8% )的BMSC中的表达率均低于正常对照组 (6 9 7% ,P <0 .0 5 )。SCL基因在CML骨髓造血细胞中的表达率 (6 4 .3% )高于其对应的BMSC(P <0 .0 5 )。半定量分析SCL基因在AML骨髓造血细胞中的表达水平显著高于其对应的BMSC(P <0 .0 5 )。结论 :SCL基因在AML和CML的BMSC中的相对低表达状态可能与血液病造血调控的异常有关。

Expression of SCL Gene in Bone Marrow Stromal Cells from Patients with Leukemia

In order to investigate expression of SCL (stem cell leukemia) gene in bone marrow stromal cells (BMSC) and bone marrow cells from patients with leukemia and normal individuals, bone marrow mononuclear cells from AML (18 cases), CML (17 cases), ALL (7 cases) and normal individuals (33 cases) were cultured long-term in vitro. Nonadherent cells (hematopoietic cells) and amplified adherent cells (BMSC) were collected respectively. RT-PCR-ELISA assay was then performed to detect expression of SCL gene. The expression ratio of SCL gene were analyzed and its expression level was normalized by beta(2)M gene acting as an internal reference for the purpose of semi-quantitative analysis. The results indicated that the expression ratio of SCL gene was lower in BMSC from AML (27.8%) and CML (11.8%) than that in normal controls (69.7%, P < 0.05), while was higher in the nonadherent cells from CML (64.3%) than that in its corresponding BMSC (P < 0.05). Semi-quantitative analysis showed that SCL gene expression level in nonadherent cells from AML was higher than that in its corresponding BMSC (P < 0.05). In conclusion, the low-level expression state of SCL gene in BMSC from patients with AML and CML may be involved in the abnormal regulation of hematopoiesis in myelocytic leukemia.