The Important Role of GPX1 and NF-κB Signaling Pathway in Human Gastric Cancer: Implications for Cell Proliferation and Invasion

Overview

Journal Cancer Genomics Proteomics

Specialties Biochemistry
Genetics
Oncology

Date 2024 Apr 26

PMID 38670589

Authors

Byeong Il Jang

Ji Yoon Jung

Sung Ae Koh

Kyung Hee Lee

Affiliations

Soon will be listed here.

Abstract

Background/aim: Glutathione peroxidases (GPXs) are crucial antioxidant enzymes, counteracting reactive oxygen species (ROS). GPX overexpression promotes proliferation and invasion in cancer cells. Glutathione peroxidase-1 (GPX1), the most abundant isoform, contributes to invasion, migration, cisplatin resistance, and proliferation in various cancers. Nuclear factor-kappa B (NF-[Formula: see text]B) participates in cell proliferation, apoptosis, and tumor progression. The inhibition of NF-[Formula: see text]B expression reduces the malignancy of esophageal squamous cell carcinoma. This study aimed to explore the GPX1 and NF-[Formula: see text]B signaling pathways and their correlation with gastric cancer cell proliferation and invasion.

Materials And Methods: Cell culture, complementary DNA microarray analysis, western blotting, reverse transcription-polymerase chain reaction, zymography, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, GPX1 knock-down with short hairpin RNA (shRNA), standard two-chamber invasion assay, chromatin immunoprecipitation assay.

Results: Hepatocyte growth factor (HGF) up-regulated GPX1 expression in gastric cancer cells. The NF-[Formula: see text]B inhibitor, pyrrolidine dithiocarbamate down-regulated HGF-induced GPX1 protein levels. Furthermore, NF-[Formula: see text]B and urokinase-type plasminogen activators were down-regulated in GPX1-shRNA-treated cells. Treatment with an Akt pathway inhibitor (LY294002) led to the down-regulation of GPX1 and NF-[Formula: see text]B gastric cancer cells. GPX1 knockdown resulted in decreased HGF-mediated in vitro cell proliferation and invasion. The study identified the putative binding site of the GPX1 promoter containing the NF-[Formula: see text]B binding site, confirmed through chromatin immunoprecipitation.

Conclusion: HGF induced GPX1 expression through the NF-[Formula: see text]B and Akt pathways, suggesting a central role in gastric cell proliferation and invasion. Hence, GPX1 emerges as a potential therapeutic target for gastric cancer.

Citing Articles

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PMID: 39193504 PMC: 11347949. DOI: 10.3389/fcimb.2024.1426340.

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