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Background Matrix metalloproteinases (MMPs) are a family of enzymes that degrade most macromolecules making up the extracellular matrix. MMPs are involved in not only the gastric mucosal inflammatory response but also the pathogenesis of Helicobacter pylori-associated diseases. In the renin-angiotensin system, chymase (CMA) is related to gastric carcinogenesis and angiogenesis in H. pylori-infected...
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