Methods Esophageal adenocarcinoma cell line SEG-l was transfected with CDX1or CDX2 cDNA.The morphology, growth rate, division index and tumorigenicity were analyzed.

• 方法用携带人CDX1或CDX2的表达载体转染食管腺癌细胞系SEG-1，观察形态、生长率变化、分裂指数、致瘤性等。