6A8α-甘露糖苷酶表达减弱和表达正常鼻咽癌细胞间的差异基因表达

目的发现因转导反义6A8 cDNA致恶性生物学行为减弱的人鼻咽癌细胞CNE-2L2(AS)和野生型细胞(W)间的差异表达基因.方法用DNA微列阵方法比较AS细胞和W细胞基因表达的差异.用Northern印迹和RT-PCR验证所得结果的可靠性.结果与W细胞相比,AS细胞有34个基因的表达上调,有42个基因的表达下调.其表达增强可能对肿瘤恶性行为有抑制作用的基因有P130mRNA for 130K protein、TGF-betaⅡR alpha、GABBR1、TGFBR1、TNFAIP1、STANIN、E-CADHERIN、CTNNA 1、CTNNA 2、RFX2及TMPO等,其表达减弱可能对肿瘤恶性行为有抑制作用的基因有CD44、NDRG1、TGFB1、RPS5、LEGUMAI、CBS、CD59及SNRPA1等.Northern印迹和RT-PCR验证了DNA微列阵方法检测的结果.结论与W细胞相比,AS细胞有34个基因表达上调,有42个基因表达下调,某些基因表达的改变可能与AS细胞恶性生物学行为的减弱相关.

Differential gene expression in nasopharyngeal carcinoma cell with reduced and normal expression of 6A8 alpha-mannosidase

OBJECTIVE: To detect the differential display of mRNA expression between human nasopharyngeal carcinoma cell CNE-2L2 with reduced malignancy caused by transduction of a DNA antisense to 6A8 alpha-mannosidase cDNA (AS cell) and the wild type cell (W cell). METHODS: Differential display of mRNA expression was analyzed using DNA microarray analysis. The datasets were confirmed by Northern blotting and RT-PCR. RESULTS: Out of the 1069 genes analyzed, 34 genes were up-regulated in AS cells relative to W cells. Conversely, 42 genes were down-regulated. The genes, up-regulation of which might have suppressive effect on tumor malignant behaviors, were P130 mRNA for 130K protein, TGF-betaIIR alpha, GABBR1, TGFBR1, TNFAIP1, STANIN, E-CADHERIN, CTNNA1 and 2, RFX2, TMPO, etc. The genes, down-regulation of which might have suppressive effect on tumor malignant behaviors, were CD44, NDRG1, TGFB1, RPS5, LEGUMAIIN, CBS, CD59, SNRPA1, etc. The microarray datasets were confirmed by Northern blot and RT-PCR analysis. CONCLUSIONS: In comparison to the W cell, AS cell has up-regulation of 34 genes and down-regulation of 42 genes. Changes of the gene expression may play a role in the malignancy reduction of AS cell.