目的:探讨凋亡抑制蛋白(inhibitor of apoptosis protein,IAP)家族的新成员Livin及其两种异构体Livinα和Livinβ在非小细胞肺癌(NSCLC)组织中的表达及其与NSCLC临床病理的关系。方法:采用逆转录多聚酶链式反应(RT-PCR)检测NSCLC组织中L...目的:探讨凋亡抑制蛋白(inhibitor of apoptosis protein,IAP)家族的新成员Livin及其两种异构体Livinα和Livinβ在非小细胞肺癌(NSCLC)组织中的表达及其与NSCLC临床病理的关系。方法:采用逆转录多聚酶链式反应(RT-PCR)检测NSCLC组织中Livinα mRNA和LivinβmRNA的表达。结果:58例NSCLC组织中Livin mRNA表达阳性率为74.1%,而在癌旁组织低表达(5.1%,P<0.01)。Livin mRNA表达与患者年龄,病理分型、肿瘤分化程度、淋巴结转移及TNM分期均无明显相关关系。结论:Livin在非小细胞肺癌组织中特异性地高表达,可能与肿瘤的发生、发展密切相关,可能成为诊断和治疗的新靶点。展开更多
OBJECTIVE To examine the possibility of human sodium iodide symporter （hNIS） protein expression in lung cancer cells. METHODS Human lung A549 cancer cells were thawed and cultured in vitro. The cells were divided in...OBJECTIVE To examine the possibility of human sodium iodide symporter （hNIS） protein expression in lung cancer cells. METHODS Human lung A549 cancer cells were thawed and cultured in vitro. The cells were divided into an experimental group transfected with a recombinant pcDNA3-hNIS plasmid and a control group transfected only with a pcDNA3 plasmid. The recombinant plasmid vector encoding the hNIS gene （pcDNA3-hNIS） was amplified, purified and identified. The hNIS gene was followed by DNA sequencing. A Western blot and an immunohistochemical assay were applied to detect the hNIS protein expression in the transfected human lung A549 cancer cells. RESULTS Restriction enzyme digestion and DNA sequencing results showed the size and direction of the inserted gene in the recombinant pcD- NA3-hNIS plasmid was correct. The Western blot method and immunohistochemical analysis showed a positive NIS protein expression in the experimental group. The NIS protein was detected mainly in the cell membranes showing a positive rate up to 70.6% with no expression of the NIS protein in the control group. There was a significant difference between two groups （P=0.000）. CONCLUSION The hNIS gene was transfected effectively into human lung A549 cancer cells mediated by Lipofectamine 2000, and was expressed with its protein in vitro.展开更多
文摘OBJECTIVE To examine the possibility of human sodium iodide symporter （hNIS） protein expression in lung cancer cells. METHODS Human lung A549 cancer cells were thawed and cultured in vitro. The cells were divided into an experimental group transfected with a recombinant pcDNA3-hNIS plasmid and a control group transfected only with a pcDNA3 plasmid. The recombinant plasmid vector encoding the hNIS gene （pcDNA3-hNIS） was amplified, purified and identified. The hNIS gene was followed by DNA sequencing. A Western blot and an immunohistochemical assay were applied to detect the hNIS protein expression in the transfected human lung A549 cancer cells. RESULTS Restriction enzyme digestion and DNA sequencing results showed the size and direction of the inserted gene in the recombinant pcD- NA3-hNIS plasmid was correct. The Western blot method and immunohistochemical analysis showed a positive NIS protein expression in the experimental group. The NIS protein was detected mainly in the cell membranes showing a positive rate up to 70.6% with no expression of the NIS protein in the control group. There was a significant difference between two groups （P=0.000）. CONCLUSION The hNIS gene was transfected effectively into human lung A549 cancer cells mediated by Lipofectamine 2000, and was expressed with its protein in vitro.
