Associations of TNF-A-1031TT and -857TT genotypes with Helicobacter pylori seropositivity and gastric atrophy among Japanese Brazilians.

Background Our previous study in a Japanese population showed elevated Helicobacter pylori seropositivity in those with tumor necrosis factor (TNF) A -1031TT and -857TT genotypes. This study examined the associations of this seropositivity and serum pepsinogen (PG) levels with these genotypes in Japanese Brazilians.