期刊
GUT MICROBES
卷 15, 期 2, 页码 -出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/19490976.2023.2263936
关键词
Helicobacter pylori; gastric inflammation; gastric cancer; hypoxia-inducible factor-1 alpha (HIF-1 alpha); dimethyloxalylglycine (DMOG); prolyl hydroxylase (PHD)
HIF-1α plays a crucial role in Helicobacter pylori-induced gastric injury and is involved in protecting against inflammation and bacterial virulence.
Helicobacter pylori-induced inflammation is the strongest known risk factor for gastric adenocarcinoma. Hypoxia-inducible factor-1 (HIF-1 alpha) is a key transcriptional regulator of immunity and carcinogenesis. To examine the role of this mediator within the context of H. pylori-induced injury, we first demonstrated that HIF-1 alpha levels were significantly increased in parallel with the severity of gastric lesions in humans. In interventional studies targeting HIF-1 alpha, H. pylori-infected mice were treated +/- dimethyloxalylglycine (DMOG), a prolyl hydroxylase inhibitor that stabilizes HIF-1 alpha. H. pylori significantly increased proinflammatory chemokines/cytokines and inflammation in vehicle-treated mice; however, this was significantly attenuated in DMOG-treated mice. DMOG treatment also significantly decreased function of the H. pylori type IV secretion system (T4SS) in vivo and significantly reduced T4SS-mediated NF-kappa B activation and IL-8 induction in vitro. These results suggest that prolyl hydroxylase inhibition protects against H. pylori-mediated pathologic responses, and is mediated, in part, via attenuation of H. pylori cag-mediated virulence and suppression of host proinflammatory responses.
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