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The gastric pathogen Helicobacter pylori causes peptic ulcer disease and gastric cancer. We have reported that in H. pylori-activated macrophages, nitric oxide (NO) derived from inducible NO synthase (iNOS) can kill the bacterium, iNOS protein expression is dependent on uptake of its substrate l-arginine (l-Arg), the polyamine spermine can inhibit iNOS translation by inhibiting l-Arg uptake, and inhibition...
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