Methods: a VacA(+) and CagA(+) international standard H. pylori line NCTC11637 and a human gastric epithelial carcinoma cell line BGC 823 were used.

• 方法 :实验选用VacA(+)和CagA(+)的国际标准幽门螺杆菌菌株NCTC116 37和人胃上皮癌细胞株BGC 82 3。