Helicobacter pylori Infection Enhances Gastric Mucosal Inflammation in Individuals Carrying the 260-T Allele of the CD14 Gene

• Published in: Gut and liver Vol. 7; no. 3; pp. 317 - 322
• Main Authors: Eun Jung Kim, Woo Chul Chung, Kang Moon Lee, Chang Nyol Paik, Sang Bae Kim, You Suk Oh, Yang Woon Lee, Sung Goo Kang, Seung June Noh
• Format: Journal Article
• Language: Korean
• Published: 대한간학회 30.05.2013
• Subjects: CD14; Gastritis; Genetic polymorphism; Helicobacter pylori
• ISSN: 1976-2283; 2005-1212

Background/Aims: We aim to evaluate the association between promoter polymorphism of the clusters of differentiation 14 (CD14) gene and Helicobacter pylori-induced gastric mucosal inflammation in a healthy Korean population. Methods: The study population consisted of 267 healthy subjects who visited our hospital for free nationwide gastric cancer screening. Promoter polymorphism at -260 C/T of the CD14 gene was determined by polymerase chain reaction and restriction fragment length polymorphism analysis. The severity of gastric mucosal inflammation was estimated by a gastritis score based on the sum of the values of the grade and activity of the gastritis. Expression of soluble CD14 (sCD14) was assessed by quantitative sandwich ELISA. Results: CD14 polymorphism was not associated with H. pylori infection. There were no significant differences in gastritis scores among the genotype subgroups, but subjects carrying the CD14 -260 CT/TT genotype had significantly higher sCD14 levels than those carrying the CC genotype. Subjects with the 260-T allele of the CD14 gene and H. pylori infection had significantly higher sCD14 levels than those with the same genotype but without infection. Conclusions: In individuals with the T allele at the -260 site of the promoter region of the CD14 gene, H. pylori infection accentuates gastric mucosal inflammation. (Gut Liver 2013; 7:317-322)