Affiliation:
1. Department of Cardiovascular Surgery China–Japan Friendship Hospital Beijing People's Republic of China
2. Peking Union Medical College Chinese Academy of Medical Sciences Beijing People's Republic of China
3. Department of Clinical Laboratory China–Japan Friendship Hospital Beijing People's Republic of China
4. Department of Pediatrics, Herman B Wells Center for Pediatric Research Indiana University School of Medicine Indianapolis Indiana USA
5. Institute of Clinical Medical, Peking University China–Japan Friendship School of Clinical Medicine Sciences China–Japan Friendship Hospital Beijing People's Republic of China
Abstract
AbstractHyperuricemia closely correlates with the development of atherosclerosis, but little is known of the mechanism by which atherosclerosis progression occurs in hyperuricemia. Atherosclerosis appears to involve pyroptosis, an emerging mechanism of proinflammatory regulated cell death. This study tested the hypothesis that pyroptosis underlies the relationship between hyperuricemia and atherosclerosis, using ApoE−/− mice (a model of atherosclerosis), human umbilical vein endothelial cells (HUVECs), and human atherosclerotic arterial samples. We found that hyperuricemia can aggravate the aortic atherosclerotic plaque‐load in ApoE−/− mice and promote endothelial cell pyroptosis. Additionally, hyperuricemia can increase the levels of serum inflammatory factors (including IL‐1β and IL‐18). Exposure to lipopolysaccharide plus a high concentration of soluble uric acid (≥12 mg/dL) induced cell pyroptosis in HUVECs, as evidenced by increased expression of pyroptosis‐related proteins and elevated release of lactate dehydrogenase (a marker of tissue damage). Further, MCC950, a selective nucleotide‐binding oligomerization domain (NOD)‐like receptor 3 (NLRP3) inflammasome inhibitor, and N‐acetyl‐
l‐cysteine, an antioxidant, attenuated HUVEC pyroptosis by inhibiting activation of the NLRP3 inflammasome and production of intracellular reactive oxygen species (ROS). Finally, we detected significantly higher expression of pyroptosis‐associated proteins in carotid specimens from patients with hyperuricemia. Collectively, our findings suggest that hyperuricemia can aggravate endothelial cell pyroptosis in aortic atherosclerotic plaques, promoting the development of atherosclerosis. Additionally, a high concentration of soluble uric acid can trigger the activation stage of the NLRP3 inflammasome, mediating endothelial cell pyroptosis, and this process is regulated by the cellular ROS level.
Funder
National Natural Science Foundation of China
Subject
Cell Biology,Clinical Biochemistry,Physiology
Cited by
7 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献