急性B淋巴细胞白血病TGF-β信号转导通路基因表达差异的研究

本研究旨在探讨急性B淋巴细胞白血病（B—ALL）TGF—β信号转导通路基因表达谱。应用荧光实时定量RT-PCR和包含人TGF-β／BMP信号转导通路上113个基因的芯片分别检测经过FAB分型和免疫学分型的B—ALL患者白血病细胞、急性B淋巴细胞白血病细胞株NALM6细胞、Raji细胞的TGF—β，mRNA及TGF—β信号转导通路上各基因表达谱，以经流式细胞术分选的健康人的外周血B淋巴细胞为对照，比较两者差异。结果表明，同健康人外周血B淋巴细胞相比较，B—ALL细胞、NALM6细胞、Raji细胞TGF-β1表达水平下调，cyc和Smad-1基因表达上调，几击、Smad-7基因表达下调。结论：急性B淋巴细胞白血病存在TGF—β信号转导通路异常。

Gene expression profile of human TGF-beta signal transduction pathway of B cell type acute lymphocytic leukemia

This study was aimed to investigate the gene expression profile of TGF-beta signal transduction pathway in B-cell type acute lymphocytic leukemia (B-ALL). The gene expression profiles in B-ALL primary cells and cell lines (NALM6 cells, Raji cells), B-lymphocyte of control were detected by cDNA microarray including 113 different genes in human TGF-beta/BMP signal transduction pathway, and TGF-beta(1) mRNA expression was detected by real time RT-PCR. The B lymphocytes in peripheral blood of heacthy persons sorted by flow cytometry were used as control. The difference between them was compared. The results showed that as compared with B lymphocytes in peripheral blood of heacthy persons, the TGF-beta(1) expression in B-ALL cells, NALM6 cells and Raji cells were down-regulationed, myc and smad1 gene expressions were up-regulated, IL-6, smad 7 gene expressions were down-regulated. It is concluded that TGF-beta signal transduction is abnormal in B-cell type acute lymphocytic leukemia.