摘要
目的构建C57小鼠L型氨基酸转运载体1(LAT1)的真核表达载体,转染Neuro-2a肿瘤细胞进行表达,探讨LAT1对Neuro-2a细胞增殖及凋亡的影响。方法采用RT-PCR扩增出LAT1全长目的基因,定向克隆pcDNA3.1表达载体,构建pcDNA3.1-LAT1重组表达质粒,通过脂质体法将阳性克隆转染Neuro-2a细胞,经G418筛选获得稳定表达株后,用RT-PCR和western blot蛋白印迹法检测LAT1的表达情况。通过MTT法检测各组Neuro-2a细胞的增殖情况,并借助流式细胞仪检测LAT1对Neuro-2a细胞增殖和凋亡的影响。结果成功构建小鼠pcDNA3.1-LAT1真核表达载体,酶切和测序证实其序列正确,并成功转染Neuro-2a细胞建立稳定转染细胞系。MTT法显示转染重组质粒pcDNA3.1-LAT1的Neuro-2a细胞增殖速度显著高于对照组(P<0.05),且流式细胞术检测转染组对Neuro-2a细胞具有促进增殖抑制凋亡的作用。结论转染pcDNA3.1-LAT1质粒的Neuro-2a细胞能成功表达LAT1蛋白,且LAT1对Neuro-2a细胞的增殖和凋亡均有显著影响,为进一步研究LAT1的生物学作用奠定了重要基础。
Objective To construct the lamino acid transporter 1 eukaryotic expression vector of C 57 mouse and to express the gene inNeuro-2atumor cells,and explore the effect of LAT1on proliferation and apoptosis of Neuro-2a cell. Methods The full-length LAT1 cDNA was synthesized by RT-PCR and cloned into pcDNA3.1vector to construct recombinant plasmid.The constructed pcDNA3.1-LAT1vector was verified by Enzyme digestion and sequencing and then transfected intomurine Neuro-2acellsby liposome.The transfected cells were selected with G418 and stably expressed strain was constructed .The expression of LAT1 was detected by RT-PCR and western blot .Proliferation was analyzed by MTT , cell cycle and apoptosis were detected by flow cytometric analysis .Results The full-length LAT1 cDNA was amplified successfully and pcDNA3.1-LAT1eukaryoticvector was constructed successfully .Enzyme digestion and sequencing confirmed the sequence was correct .Neuro-2acells were transfected and Stably expressed strain was constructed＆amp;nbsp;successfully.MTT showed that the group of transfected restructuring plasmid could significantly affect Neuro -2a cell proliferation more than the control groups （ P 〈0.05 ） .From the flowcytometric analysis , LAT1 could promote cell proliferation and inhibit Neuro-2a cell apoptosis.Conclusion LAT1 can express successfully inNeuro-2acells which were transfected with recombinantpcDNA3.1-LAT1plasmid.LAT1 in Neuro-2a cells can promote cell proliferation and inhibit the cell apoptosis which provides a basis for the study of LAT 1.That lays the foundation for studying biological effects of LAT 1.
出处
《中国比较医学杂志》
CAS
2014年第5期25-30,F0003,共7页
Chinese Journal of Comparative Medicine
