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Eur J Gastroenterol Hepatol. 1995 Aug;7 Suppl 1:S79-81.

Effect of ammonia on cell-cycle progression of human gastric cancer cells.

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1
Department of Preventive Medicine, Kyoto Prefectural University of Medicine, Japan.

Abstract

AIM:

Ammonia is a cytotoxic factor of Helicobacter pylori that is involved in gastric mucosal injury. This study was designed to show whether ammonia has an effect on the cell-cycle progression in human gastric cells in vitro.

MATERIALS AND METHODS:

We studied the effects of ammonia and ammonium chloride on cell growth and cell-cycle progression of the human gastric cancer cell line HGC-27. We cultured HGC-27 cells and counted viable cells by trypan blue dye exclusion 24 h after the addition of various concentrations of ammonia or ammonium chloride. DNA contents of nuclei were analysed by flow-cytometry.

RESULTS:

Ammonia and ammonium chloride inhibited the proliferation of HGC-27 cells dose-dependently. Flow-cytometric analysis showed S-phase accumulation of HGC-27 cells treated with ammonia and ammonium chloride at cytostatic doses.

CONCLUSIONS:

These results suggest that ammonia and ammonium chloride inhibit the growth of gastric cells in S phase. This mechanism may make a significant contribution to the pathogenesis of Helicobacter pylori-associated gastric mucosal atrophy.

PMID:
8574744
[Indexed for MEDLINE]

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