Infection and Oxidative Stress

Overview

Journal J Clin Biochem Nutr

Specialty Biochemistry

Date 2024 Nov 25

PMID 39583977

Authors

Hidekazu Suzuki

Miwa Hirai

Affiliations

Soon will be listed here.

Abstract

() infection promotes the migration of polymorphonuclear leukocytes from the gastric mucosal microcirculation through chemokine induction, leading to the excessive production of ROS. Like eukaryotes, possesses superoxide dismutase and catalase, and is resistant to ROS from host polymorphonuclear leukocytes. Oxidants such as monochloramine produced by ROS cause chronic inflammation in the gastric mucosa. -derived virulence factor m1-type VacA induces intracellular ROS accumulation and autophagy, which degrades the -derived oncoprotein, CagA. In CD44v9-positive gastric cancer stem-like cells, reduced-type glutathione levels increase within the cell because of the cystine transporter on the cell surface, wherein oxidative stress-induced autophagy no longer occurs. As a result, the oncoprotein CagA accumulates in the cells, thus becoming tumorigenic.

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