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• W2946121352 abstract "Abstract Background Cation transport regulator 1 (CHAC1), a newly discovered enzyme that degrades glutathione, is induced in Helicobacter pylori ( H. pylori )‐infected gastric epithelial cells in culture. The CHAC1‐induced decrease in glutathione leads to an accumulation of reactive oxygen species and somatic mutations in TP53 . We evaluated the possible correlation between H. pylori infection and CHAC1 expression in human gastric mucosa. Materials and Methods Both fresh‐frozen and formalin‐fixed paraffin‐embedded tissue samples of gastric mucosa with or without H. pylori infection were obtained from 41 esophageal cancer patients that underwent esophago‐gastrectomy. Fresh samples were used for real‐time polymerase chain reaction for H. pylori DNA and CHAC1 mRNA, and formalin‐fixed samples were used for immunohistochemistry with anti‐CHAC1 and anti‐ H. pylori monoclonal antibodies. Double‐enzyme or fluorescence immunohistochemistry and immuno‐electron microscopy were used for further analysis. Results Significant CHAC1 overexpression was detected in H. pylori ‐infected parietal cells that expressed the human proton pump/H,K‐ATPase α subunit, whereas a constitutively low level of CHAC1 mRNA expression was observed in the other samples regardless of the H. pylori infection status, reflecting the weak CHAC1 expression detected by immunohistochemistry in the fundic‐gland areas. Immuno‐electron microscopy revealed intact H. pylori cells in the secretory canaliculi of infected parietal cells. Some parietal cells exhibited positive nuclear signals for Ki67 in the neck zone of the gastric fundic‐gland mucosa with H. pylori infection. Conclusion Cation transport regulator 1 overexpression in H. pylori ‐infected parietal cells may cause the H. pylori ‐induced somatic mutations that contribute to the development of gastric cancer." @default.
• W2946121352 created "2019-05-29" @default.
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• W2946121352 date "2019-05-20" @default.
• W2946121352 modified "2023-10-16" @default.
• W2946121352 title "CHAC1 overexpression in human gastric parietal cells with <i>Helicobacter pylori</i> infection in the secretory canaliculi" @default.
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• W2946121352 doi "https://doi.org/10.1111/hel.12598" @default.
• W2946121352 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6618068" @default.
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