title: A novel action of the proton pump inhibitor rabeprazole and its thioether derivative against the motility of Helicobacter pylori.
abstract: The motility of Helicobacter pylori was maximum at 37 degrees C and at pH 6. A newly developed proton pump inhibitor, rabeprazole (RPZ), and its thioether derivative (RPZ-TH) markedly inhibited the motility of H. pylori. The concentrations of the drug necessary to inhibit 50% of the motility were 0.25, 16, 16, and >64 microgram/ml for RPZ-TH, RPZ, lansoprazole, and omeprazole, respectively. No such inhibitory effects were observed with H(2) blockers or anti-H. pylori agents. The motilities of Campylobacter jejuni and C. coli-but not those of Vibrio cholerae O1 and O139, Vibrio parahaemolyticus, Salmonella enterica serovar Typhimurium, and Proteus mirabilis-were also inhibited. Prolonged incubation with RPZ or RPZ-TH inhibited bacterial growth of only H. pylori, except for a turbid colony mutant. The results indicate that RPZ and RPZ-TH have a characteristic inhibitory effect against the motility of H. pylori (spiral-shaped bacteria), which is distinguished from that against bacterial growth.
authors.affiliation: Department of Bacteriology, School of Medicine, Niigata University, 757 Ichibanchou, Niigata, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Tsutsui
authors.forename: I
authors.initials: I
authors.lastname: Taneike
authors.forename: T
authors.initials: T
authors.lastname: Ohara
authors.forename: S
authors.initials: S
authors.lastname: Goshi
authors.forename: S
authors.initials: S
authors.lastname: Kojio
authors.forename: N
authors.initials: N
authors.lastname: Iwakura
authors.forename: H
authors.initials: H
authors.lastname: Matsumaru
authors.forename: N
authors.initials: N
authors.lastname: Wakisaka-Saito
authors.forename: H M
authors.initials: HM
authors.lastname: Zhang
authors.forename: T
authors.initials: T
authors.lastname: Yamamoto
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000897:Anti-Ulcer Agents / Q000737:chemistry / Q000494:pharmacology*; D001562:Benzimidazoles / Q000737:chemistry / Q000494:pharmacology*; D002455:Cell Division / Q000187:drug effects; D016480:Helicobacter pylori / Q000166:cytology / Q000187:drug effects* / Q000502:physiology; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008826:Microbial Sensitivity Tests; D009853:Omeprazole / Q000031:analogs & derivatives; D054328:Proton Pump Inhibitors; D064750:Rabeprazole; D013440:Sulfides / Q000737:chemistry; D013696:Temperature
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000897:Anti-Ulcer Agents; D001562:Benzimidazoles; D054328:Proton Pump Inhibitors; D013440:Sulfides; D064750:Rabeprazole; D009853:Omeprazole