JAK‐STAT1 Signaling Pathway Is an Early Response to Helicobacter pylori Infection and Contributes to Immune Escape and Gastric Carcinogenesis
Li X, Pan K, Vieth M, Gerhard M, Li W, Mejiías‐luque R (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Book Volume: 23
Article Number: 4147
Journal Issue: 8
DOI: 10.3390/ijms23084147
Abstract
Helicobacter pylori infection induces a number of pro‐inflammatory signaling pathways contributing to gastric inflammation and carcinogenesis and has been identified as a major risk factor for the development of gastric cancer (GC). Janus kinase‐signal transducer and activator of transcription (JAK‐ STAT) signaling mediates immune regulatory processes, including tumor‐driven immune escape. Programmed death ligand 1 (PD‐L1) expressed on gastric epithelium can suppress the immune system by shutting down T cell effector function. In a human cohort of subjects with gastric lesions and GC analyzed by proteomics, STAT1 increased along the cascade of progression of precancerous gastric lesions to GC and was further associated with a poor prognosis of GC (Hazard Ratio (95% confidence interval): 2.34 (1.04–5.30)). We observed that STAT1 was activated in human H. pylori‐positive gastritis, while in GC, STAT1, and its target gene, PD‐L1, were significantly elevated. To confirm the dependency of H. pylori, we infected gastric epithelial cells in vitro and observed strong activation of STAT1 and upregulation of PD‐L1, which depended on cytokines produced by immune cells. To investigate the correlation of immune infiltration with STAT1 activation and PD‐L1 expression, we employed a mouse model of H. pylori‐induced gastric lesions in an Rnf43‐deficient background. Here, phosphorylated STAT1 and PD‐ L1 were correlated with immune infiltration and proliferation. STAT1 and PD‐L1 were upregulated in gastric tumor tissues compared with normal tissues and were associated with immune infiltration and poor prognosis based on the TCGA‐STAD database. H. pylori‐induced activation of STAT1 and PD‐L1 expression may prevent immune surveillance in the gastric mucosa, allowing premalignant lesions to progress to gastric cancer.
Involved external institutions
China (CN)How to cite
APA:
Li, X., Pan, K., Vieth, M., Gerhard, M., Li, W., & Mejiías‐luque, R. (2022). JAK‐STAT1 Signaling Pathway Is an Early Response to Helicobacter pylori Infection and Contributes to Immune Escape and Gastric Carcinogenesis. International Journal of Molecular Sciences, 23(8). https://dx.doi.org/10.3390/ijms23084147
MLA:
Li, Xue, et al. "JAK‐STAT1 Signaling Pathway Is an Early Response to Helicobacter pylori Infection and Contributes to Immune Escape and Gastric Carcinogenesis." International Journal of Molecular Sciences 23.8 (2022).
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