ArticleGenes & genomics2021
Autophagy induced by H. pylori VacA regulated the survival mechanism of the SGC7901 human gastric cancer cell line.
Article in Genes & genomics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 9 citations in OpenAlex.
- Mitochondrial Stress inAntioxidants (Basel, Switzerland) · 2026Review
- Host-Derived Reactive Oxygen Species in the Gut Epithelium: Defence Mechanism and Target of Bacterial Subversion.Antioxidants (Basel, Switzerland) · 2025Review
- Association betweenFrontiers in medicine · 2025Article
- Infection of Helicobacter pylori contributes to the progression of gastric cancer through ferroptosis.Cell death discovery · 2024Review
- The interaction between autophagy, Helicobacter pylori, and gut microbiota in gastric carcinogenesis.Trends in microbiology · 2023Review
- Reactive Oxygen Species andAntioxidants (Basel, Switzerland) · 2023Review
- Review
- Vacuolating Cytotoxin A Triggers Mitophagy inFrontiers in oncology · 2022Article
- Three Classes of Antioxidant Defense Systems and the Development of Postmenopausal Osteoporosis.Frontiers in physiology · 2022Review
Corrections and comments
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Authors and funding
9 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundVacuolating cytotoxin (VacA) is an important virulence factor of Helicobacter pylori (H. pylori). It was previously believed that VacA can trigger the cascade of apoptosis on mitochondria to lead to cell apoptosis. Recently, it was found that VacA can induce autophagy. However, the molecular mechanism by which VacA induces autophagy is largely unknown.
objectiveWe aimed to explore the molecular mechanism of autophagy induced by H. pylori in gastric cancer cells and the effect of autophagy on the survival of gastric cancer cells.
methodsThe autophagy of human gastric cancer cell line SGC7901 was detected by Western blot and RT-PCR in the treatment of VacA protein of H. pylori. The relationship between autophagy and reactive oxygen species (ROS) in the proliferation of gastric cancer cells were studied by gene expression silences (siRNA) and CM-H2DCFDA (DCF) staining.
resultsThe results showed that VacA protein secreted by H. pylori in the supernatant stimulated autophagy in SGC7901 cells. After VacA protein treatment, the mRNA expressions of BECN1, ATG7 and PIK3C3, were up-regulated. ATG7 silencing by siRNA inhibited VacA-induced autophagy. Furthermore, our data demonstrated that VacA protein increased ROS levels. Addition of the antioxidant N-acetyl-L-cysteine (NAC) suppressed the levels of ROS, leading to inhibition of autophagy.
conclusionsH. pylori VacA is a key toxin that induces autophagy by increased ROS levels. And our findings demonstrated that VacA significantly inhibited proliferation in SGC7901 cells.
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