| associations of a ptpn11 g/a polymorphism at intron 3 with helicobactor pylori seropositivity, gastric atrophy and gastric cancer in japanese. | previous studies have revealed the significance of helicobacter pylori (h. pylori) infection as a risk factor of gastric cancer. cytotoxin-associated gene a (caga) positivity has been demonstrated to determine the clinical outcome of h. pylori infection in the presence of shp-2 (src homology 2 domain-containing protein tyrosine phosphatase-2). this study aimed to examine the formerly reported association of g/a ptpn11 (protein-tyrosine phosphatase, nonreceptor-type 11) polymorphism (rs2301756) w ... | 2009 | 19589142 |