title: Evaluation of combined antibiotic-omeprazole therapies in Helicobacter pylori-infected Mongolian gerbils.
abstract: Mongolian gerbils are a laboratory host for gastric colonization with Helicobacter pylori, showing gastritis followed by typical gastric ulcer after infection with H. pylori. In such gerbils, we evaluated combined therapies of amoxicillin (AMPC) and clarithromycin (CAM) as antibiotics, and omeprazole (OPZ) as a H+/K+ adenosine triphosphatase (ATPase) inhibitor. The gerbils were orally inoculated with 2 x 10(8) bacilli of H. pylori ATCC 43504. Four weeks after inoculation, the infected gerbils were orally treated singly with OPZ, AMPC, and CAM, and their insufficient efficacy on bacterial clearance was confirmed by a polymerase chain reaction technique, and by a culture method. In contrast, combined therapy of OPZ plus either AMPC or CAM showed significant bacterial clearance, demonstrating the efficacy of this combined therapy in the gerbil model. Mongolian gerbils are suggested to be useful for the pharmacological evaluation of anti-H. pylori compounds.
authors.affiliation: Research Laboratories, Yoshitomi Pharmaceutical Industries, Ltd., Fukuoka, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Kusuhara
authors.forename: F
authors.initials: F
authors.lastname: Hirayama
authors.forename: H
authors.initials: H
authors.lastname: Matsuyuki
authors.forename: M
authors.initials: M
authors.lastname: Hisadome
authors.forename: Y
authors.initials: Y
authors.lastname: Ikeda
mesh_terms: D000658:Amoxicillin / Q000627:therapeutic use; D000818:Animals; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D017291:Clarithromycin / Q000627:therapeutic use; D017931:DNA Primers; D004359:Drug Therapy, Combination / Q000627:therapeutic use*; D004791:Enzyme Inhibitors / Q000627:therapeutic use*; D005849:Gerbillinae; D016481:Helicobacter Infections / Q000188:drug therapy*; D016480:Helicobacter pylori / Q000235:genetics; D008297:Male; D009853:Omeprazole / Q000627:therapeutic use*; D010406:Penicillins / Q000627:therapeutic use; D016133:Polymerase Chain Reaction / Q000379:methods; D012150:Polymorphism, Restriction Fragment Length; D013276:Stomach Ulcer / Q000188:drug therapy
chemical_list: D000900:Anti-Bacterial Agents; D017931:DNA Primers; D004791:Enzyme Inhibitors; D010406:Penicillins; D000658:Amoxicillin; D017291:Clarithromycin; D009853:Omeprazole