Sunday, January 18, 2026

MicroRNAs Up-Regulated by CagA of Helicobacter pylori Induce Intestinal Metaplasia of Gastric Epithelial Cells

Authors: Yongliang Zhu, Qiaoli Jiang, Xiaojun Lou, Xiaowei Ji, Zhenzhen Wen, Jia Wu, Haiying Tao, Tingting Jiang, Wei He, Caihua Wang, Qin Du, Shu Zheng, Jianshan Mao, Jian Huang

DOI: 10.1371/journal.pone.0035147

Abstract Summary

H. pylori’s cancer-causing CagA protein triggers two microRNAs (miR-584 and miR-1290) that disrupt normal cell differentiation in gastric tissue. These microRNAs create a self-reinforcing loop through Erk1/2 and NF-κB signaling, target the Foxa1 protein, and promote precancerous intestinal metaplasia in mice—revealing a novel mechanism for CagA-driven gastric cancer development.

Why Brain? 🧠

H. pylori’s CagA protein triggers specific microRNAs that cause precancerous intestinal metaplasia in stomach cells, revealing a novel molecular pathway linking bacterial infection to gastric cancer development.

License: CC BY.


The image is AI-generated for illustrative purposes only. Courtesy of Midjourney.

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