title: Relation between interleukin-1beta messenger RNA in gastric fundic mucosa and gastric juice pH in patients infected with Helicobacter pylori.
abstract: The effects of Helicobacter pylori infection on gastric acid secretion has not been clarified. The aim of this study was to elucidate the effects of H. pylori infection on gastric juice pH in relation to gene expression of interleukin-1beta (IL-1beta), which is reported to inhibit gastric acid secretion. Gastric juice pH and serum gastrin levels were measured in patients with peptic ulcer disease. The amount of IL-1beta mRNA in gastric fundic gland mucosa was also measured by a competitive reverse transcription-polymerase chain reaction method. These parameters were determined before and after treatment with lansoprazole and amoxicillin. Before treatment a significant positive relation was observed between the amount of IL-1beta mRNA in gastric fundic gland mucosa and gastric juice pH. After treatment significant decreases in the amount of IL-1beta mRNA, gastric juice pH, and serum gastrin levels were observed in patients with eradication of H. pylori, whereas no significant changes were observed in patients without eradication. These results suggest that H. pylori infection induces IL-1beta and suppresses acid secretion, resulting in increases in gastric juice pH and serum gastrin levels. Eradication of H. pylori decreases IL-1beta induction, resulting in an increase in gastric juice acidity and normalization of serum gastrin levels.
authors.affiliation: First Department of Medicine, Hamamatsu University School of Medicine, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Wang
authors.forename: T
authors.initials: T
authors.lastname: Furuta
authors.forename: M
authors.initials: M
authors.lastname: Takashima
authors.forename: H
authors.initials: H
authors.lastname: Futami
authors.forename: N
authors.initials: N
authors.lastname: Shirai
authors.forename: H
authors.initials: H
authors.lastname: Hanai
authors.forename: E
authors.initials: E
authors.lastname: Kaneko
mesh_terms: D001483:Base Sequence; D018076:DNA, Complementary / Q000737:chemistry; D004381:Duodenal Ulcer / Q000503:physiopathology; D005260:Female; D005744:Gastric Acid / Q000378:metabolism; D005750:Gastric Juice / Q000378:metabolism*; D005753:Gastric Mucosa / Q000378:metabolism*; D005755:Gastrins / Q000097:blood; D005786:Gene Expression Regulation; D016481:Helicobacter Infections / Q000503:physiopathology*; D016480:Helicobacter pylori; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007375:Interleukin-1 / Q000235:genetics / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D010437:Peptic Ulcer / Q000503:physiopathology*; D012333:RNA, Messenger / Q000302:isolation & purification; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012720:Severity of Illness Index; D013276:Stomach Ulcer / Q000503:physiopathology
chemical_list: D018076:DNA, Complementary; D005755:Gastrins; D007375:Interleukin-1; D012333:RNA, Messenger