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• W2904346308 abstract "Abstract microRNAs (miRs) are short noncoding RNAs that post‐transcriptionally suppress gene expression. miR‐146a acts as an oncogene or a tumor suppressor in various cancers, including gastric cancer, but it is unclear what determines whether miR‐146a is oncogenic or tumor suppressive and the molecular mechanisms are still largely unknown. The aim of this study was to investigate the role of miR‐146a in gastric cancer, by focusing on its expression in patients who were negative for Helicobacter pylori and its reduced and increased expression effect in vitro. Twenty gastric cancer patients who were negative for H. pylori infection were selected and the expression levels of miRNA‐146a in these gastric tumors, in their matched normal gastric tissues and in gastric cancer cell lines with varying tumorigenic potential was measured. Further, the impact of increased and decreased miR‐146a expression levels on the expression of predicted target genes, cell migration, viability, proliferation, and apoptosis was examined, respectively. Our results for the first time indicated that miR‐146a is downregulated in H. pylori –negative gastric cancers and suggests that H. pylori infection determines whether miR‐146a acts as an oncogene or tumor suppressor. The level of miR‐146a expression inversely correlates with the tumorigenicity of three gastric cancer cell lines and low miR‐146a expression predicts poor recurrence‐free survival. It was also found that miR‐146a reduces the expression levels of the prometastatic genes and suppresses MKN‐45 cell migration. Functional studies showed that miR‐146a acts as a tumor suppressor miR and identifies miR‐146a as a candidate for antimetastatic miRNA replacement therapy for gastric cancer patients." @default.
• W2904346308 created "2018-12-22" @default.
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• W2904346308 date "2018-12-09" @default.
• W2904346308 modified "2023-09-23" @default.
• W2904346308 title "Downregulation of miR‐146a promotes cell migration in <i>Helicobacter pylori</i> –negative gastric cancer" @default.
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• W2904346308 doi "https://doi.org/10.1002/jcb.28225" @default.
• W2904346308 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30537266" @default.
• W2904346308 hasPublicationYear "2018" @default.
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