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Frontiers in Immunology

Frontiers in Immunology

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Transcriptional profiling reveals H.pylori-associated genes induced inflammatory cell infiltration and chemoresistance in gastric cancer

Published:30 May 2025 DOI: 10.3389/fimmu.2025.1592558 PMID: 40519938
Jinshui Tan,?Zhengxin Wu,?Yuankun Liu,?Wei Wang,?Wenjuan Qin,?Guangchao Pan,?Yubo Xiong,?Jingsong Ma,?Jiabao Zhao,?Huiwen Zhou,?ZhengJin Liu,?Haijie Lu,?Huiqin Zhuo,?Xuehui Hong

Abstract

Background: H. pylori infection is closely associated with the tumor microenvironment (TME) in gastric cancer (GC), yet its underlying mechanism is elusive. Hence, it is imperative to explore the microenvironment and drug resistance arising from H. pylori to enhance therapeutic strategies for GC.

Methods: Employing transcriptional bioinformatics, we computed a H. pylori-associated prognostic index (HPI) using datasets from TCGA and GSE62254 containing ACSM5 and HSPB2 gene expression. We assessed IC50 values for anticancer drugs and immune cell infiltration to evaluate the therapeutics and TME based on the HPI. Further, we validated the transcriptional profiling findings by examining drug sensitivity transfected with siACSM5 and siHSPB2 and analyzing scRNA-seq data and clinical patient samples.

Results: ACSM5 and HSPB2 were identified as correlates of H. pylori infection in GC. Significantly, we established the H. pylori-associated prognostic index (HPI) and found that a high HPI was linked with a worse prognosis. Classification based on the HPI indicated an enhanced infiltration of tumor microenvironment cells and resistance to anti-tumor drugs.

Conclusion: The HPI, reflecting newly identified and complementary biomarkers, correlated with the TME and could accurately project chemoresistance and an altered immune cell distribution in GC patients, thus providing clinical guidance on therapeutic interventions.

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