Relationship between expression of CDX2 in intestinal metaplasia of stomch and Helicobacter pylori infection

Objective To investigate the expression of CDX2 and its clinical significance in gastric intestinal epithelial tissue,and investigate the relationship between expression of CDX2 and infection of Helicobacter pylori.Methods The expression of CDX2 was studied by immunohistochemical technique in 93 cases of gastric mucosa (including 7 cases of normal gastric mucosa,21 cases of superficial gastritis,22cases of atrophic gastritis,43 cases of atrophic gastritis with intestinal metaplasia).14C urea breath test was used to detect the Helicobacter pylori infection.Results Helicobacter pylori was negative in 7 cases of normal gastric mucosa,the positive rate of Helicobacter pylori infection in atrophic gastritis and atrophic gastritis with intestinal metaplasia was 77.27％ (17/22),65.12％ (28/43),significantly higher than that of superficial gastritis [ 19.05％(4/21 )] (P ＜0.01 ).No expression of CDX2 was observed in normal gastric mucosa and superficial gastritis.The positive rate of CDX2 in atrophic gastritis with intestinal metaplasia was 83.72％(36/43 ),which was higher than that in atrophic gastritis [40.91％(9/22)](P＜ 0.01 ).Conclusions The infection of Helicobacter pylori and the expression of CDX2 are significantly associated with intestinal metaplasia.The abnormal expression of CDX2 might be the origin of intestinal metaplasia.The detection of gastric mucosa of CDX2 expression can be used to identify the intestinal metaplasia of gastric mucosa,predict the progress of gastric precancerous lesions,and provide a basis for the selection of treatment program. Key words: Helicobacter pylori;  CDX2;  Intestinal metaplasia