Activity of Lansoprazole (new proton pump inhibitor) against Helicobacter pylori and its therapeutic efficacy
Tamura, K.; Murai, M.; Tanaka, M.; Kawano, S.
Nihon Rinsho. Japanese Journal of Clinical Medicine 51(12): 3261-3266
1993
ISSN/ISBN: 0047-1852 PMID: 8283644 Document Number: 418512
Lansoprazole, one of PPIs, is a strong antacid and it cures stomach and duodenal ulcers at early stages as well as having antibiotic action towards HP. The in vitro MIC of the product is between 3.13 and 12.5 micrograms/ml and it was 12.5 micrograms/ml, which was the same as MIC of colloidal bismuth citrate, in our study. Sterilizing effect of Lansoprazole is reported to be the direct attack on HP bacteria from electron microscopic findings. Our study revealed that Lansoprazole would preserve the epithelial cells on the edge of a stomach ulcer and would protect PAS-positive substance within them. Lansoprazole is said to cure many H2-Blocker resistant ulcers and to suppress the rate of recurrence of stomach and duodenal ulcers. These effects are considered to be attributable to maintenance of mucous barrier and maintenance of cytoprotection of the gastric mucosa by Lansoprazole as well as its sterilizing action mainly on HP.