期刊
EUROPEAN JOURNAL OF PHARMACOLOGY
卷 906, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.ejphar.2021.174270
关键词
Xanthine oxidoreductase; Oxidative stress; Colitis-associated colorectal cancer; Macrophages
资金
- National Natural Science Foundation of China [81773064, 31972973, 31530056]
- National Youth 1000 Talents Plan
- Jiangsu Specially-Appointed Professor Program
- Jiangsu Province Recruitment Plan for High-level, Innovative and Entrepreneurial Talents (Innovative Research Team)
- Collaborative innovation center of food safety and quality control in Jiangsu Province
XOR plays a crucial role in the development of colorectal cancer by programming the tumor microenvironment and stimulating the progression of CAC through DNA damage-induced genetic instability.
In addition to its pivotal role in purine metabolism, xanthine oxidoreductase (XOR) is one of the key enzymes involved in superoxide radical generation. Oxidative stress has been implicated in the etiology of colorectal cancer, but the contribution of XOR remains unclear. Here we investigated the role of XOR in colitis-associated colorectal cancer (CAC) and the underlying mechanisms. Using clinical samples, we demonstrated that XOR upregulation was an early event in colonic carcinogenesis. Pharmacological inhibition of XOR effectively delayed the progression of CAC. Moreover, XOR activity positively correlated with tumor necrosis factor-alpha (TNF alpha) protein levels. Mechanistically, TNF alpha may activate XOR transcription via activator protein-1 and, thus, promote endogenous hydrogen peroxide generation, resulting in oxidative DNA damage in colon cancer cells. On the other hand, XOR may regulate the TNF alpha mRNA transcripts by mediating LPS-induced macrophage M1 polarization. Collectively, XOR promotes tumor development by programming the tumor microenvironment and stimulates CAC progression via DNA damage-induced genetic instability.
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