PRDX2 protects against oxidative stress induced by H. pylori and promotes resistance to cisplatin in gastric cancer

Sen Wang, Zheng Chen, Shoumin Zhu, Heng Lu, Dunfa Peng, Mohammed Soutto, Huma Naz, Richard Peek, Hao Xu, Alexander Zaika, Zekuan Xu, Wael El-Rifai

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Background: Helicobacter pylori (H. pylori) infection is the main risk factor for gastric cancer. The role of antioxidant enzyme peroxiredoxin 2 (PRDX2) in gastric tumorigenesis remains unknown. In vitro (AGS and SNU-1 cell lines) and in vivo mouse models were utilized to investigate the role of PRDX2 in response to H. pylori infection (7.13, J166 or PMSS1 strain). We detected high levels of PRDX2 expression in gastric cancer tissues. Gastric cancer patients with high expression levels of PRDX2 had significantly worse overall and progression-free survival than those with low levels. H. pylori infection induced activation of NF-κB with increased expression of PRDX2, in in vitro and in vivo models. The knockdown of PRDX2 led to an increase in the levels of reactive oxygen species (ROS), oxidative DNA damage, and double-strand DNA breaks, in response to H. pylori infection, as measured by H2DCFDA, 8-oxoguanine, and p-H2AXγ assays. Luciferase reporter and ChIP assays confirmed the presence of a putative binding site of NF-κB-p65 on PRDX2 promoter region. The inhibition of PRDX2 significantly sensitized AGS and SNU-1 cells to cisplatin treatment. Our data suggest that the future development of therapeutic approaches targeting PRDX2 may be useful in the treatment of gastric cancer.

Original languageEnglish (US)
Article number101319
JournalRedox Biology
Volume28
DOIs
StatePublished - Jan 2020

Keywords

  • Antioxidant response
  • Apoptosis
  • Infection
  • NF-κB
  • Oxidative DNA damage

ASJC Scopus subject areas

  • Organic Chemistry
  • Clinical Biochemistry

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