hCEACAM1介导淋病奈瑟菌对COS-1细胞的黏附

目的 研究人癌胚抗原相关细胞黏附因子1(hCEACAM1)在淋病奈瑟菌黏附宿主细胞过程中的作用.方法 将hCEACAM1 cDNA置于hCD46启动子和兔β-球蛋白第2内含子之后,构建重组真核表达载体pCDPGICEA1.转染COS-1细胞,G418筛选和流式细胞术分选稳定表达hCEACAM1的基因转染细胞.细菌黏附实验检测淋病奈瑟菌对基因转染COS-1细胞的黏附.结果 在hCD46启动子和兔β-球蛋白第2内含子的作用下,hCEACAM1 cDNA在COS-1细胞获得高效表达,淋病奈瑟菌可以黏附表达hCEACAM1的COS-1细胞.结论 hCEACAM1可以介导淋病奈瑟菌对动物细胞的黏附,可能是淋病奈瑟菌特异性感染人体的一种重要受体,可用来制备淋病奈瑟菌感染的相应转基因动物模型.

The adhesion of Neisseria gonorrhoeae to COS-1 cells mediated by human CEACAM1

Objective To study the role of human carcinoembryonic antigen-related cellular adhesion molecule 1 (hCEACAM1)in mediating the specific adhesion of N. gonorrhoeae to its human host cells.Methods A recombinant eukaryotic expression vector pCDPGICEA1 was constructed by putting hCEACAM1 cDNA behind both hCD46 promoter and rabbit β-globulin intron 2,and with which,the COS-1 cells were transfected. Following G418 selection, the COS-1 cells expressing hCEACAM1 were sorted out with flow cytometry. The adhesion of N. gonorrhoeae to the gene transfected COS-1 cells was analyzed with bacterial binding assay. Results hCEACAM1 cDNA could be expressed effectively under the direction of hCD46 promoter and rabbit β-globulin intron 2,and N. gonorrhoeae could adhere to COS-1 cells expressing hCEACAM1. Conclusion hCEACAM1 can mediate the adhesion of N. gonorrhoeae to animal originated COS-1 cells. thus its transgenic mice may be used as a novel animal model for studying N. gonorrhoeae infection.