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Keio J Med. 2002 Dec;51 Suppl 2:51-2.

Cytokine expressions and H. pylori-associated gastric mucosal lesion.

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Tokai University School of Medicine, Isehara, Kanagawa, Japan.


To determine the role of host genetic factors in Helicobacter pylori infection, we examined the relation between gastroduodenal diseases and IL-1B polymorphisms in patients with H. pylori infection. In addition, we also compared gastric mucosal cytokine levels in those patients. We confirmed the findings that the IL-1B-31 C-to-T base transition was inverted in association with the -511 T-to-C base transition. There was no relation regarding to IL-1B polymorphisms and clinical outcomes. The gastric mucosal IL-1B level of the body of the stomach but not the antrum was significantly different among IL-1B genotypes. Furthermore, the IL-8 levels in the body were also higher in IL-1B-511C/C/ IL-1B-31TT than H. pylori negative patients. These findings suggested that IL-1B polymorphisms enhance not only IL-1-B production but also IL-8 production in the gastric body and may play an important role in the development of atrophic gastritis.

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