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Mouse- and Human-derived Primary Gastric Epithelial Monolayer Culture for the Study of Regeneration
Published on: May 7, 2018
Omeprazole promotes gastric epithelial cell migration.
Ka-Man Ng1, Chi-Hin Cho, Full-Young Chang
1Division of Gastroenterology, Taipei Veterans General Hospital, Taipei, Taiwan.
The Journal of Pharmacy and Pharmacology
|April 18, 2008
Summary
Proton pump inhibitors like omeprazole promote gastric ulcer healing by enhancing epithelial cell migration, not proliferation. This PPI reverses NSAID-induced healing impairment, aiding ulcer repair independently of acid suppression.
Area of Science:
- Gastroenterology
- Cell Biology
- Pharmacology
Background:
- Proton pump inhibitors (PPIs) effectively prevent and treat non-steroidal anti-inflammatory drug (NSAID)-induced gastric ulcers.
- PPIs demonstrate superiority over histamine H(2)-receptor antagonists and misoprostol in healing NSAID-induced gastric ulcers.
Purpose of the Study:
- To investigate if omeprazole modulates gastric ulcer healing via epithelial cell proliferation or migration.
- To elucidate the cellular mechanisms underlying omeprazole's effects on gastric epithelial cells.
Main Methods:
- Utilized a rat normal gastric epithelial cell line (RGM-1).
- Assessed cell proliferation using flow cytometry and cell migration using an artificial wound model.
- Employed Western blot analysis to examine protein expression and signal pathway activation.
Main Results:
- Omeprazole did not significantly affect gastric epithelial cell proliferation at tested concentrations and time points.
- Omeprazole (10(-6) and 10(-4)M for 24-48h) significantly promoted basal cell migration.
- Omeprazole reversed indomethacin's inhibitory effect on cell migration, independent of cyclooxygenase-2 or key kinase pathways (ERK, P38, PI3K).
Conclusions:
- Omeprazole aids basal gastric ulcer healing by promoting epithelial cell migration.
- The drug counteracts NSAID-induced impairment of ulcer repair through acid-independent mechanisms.
- Omeprazole's beneficial effects on ulcer healing are primarily mediated by enhanced cell migration, not increased cell proliferation.
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