Helicobacter pylori extract stimulates inflammatory nitric oxide production

Cancer Letters
S TsujiT Kamada

Abstract

This study examined whether an extract of Helicobacter pylori had the ability to stimulate an inflammatory synthesis of nitric oxide, a mutagen and precursor of nitrosocompounds. Macrophages and neutrophils were prepared from rat and incubated with the Helicobacter pylori extract. L-Arginine-dependent nitric oxide production in these cells was significantly stimulated by the co-incubation with the Helicobacter pylori extract. This ability of the extract was strongly attenuated by protease digestion or heating. These results indicate that Helicobacter pylori induces production of nitric oxide and participates in development of gastritis and gastric carcinogenesis.

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