AMPK, metabolism, and vascular function

• Published in: The FEBS journal 2021-06, Vol.288 (12), p.3746-3771
• Main Authors: Rodríguez, Claudia, Muñoz, Mercedes, Contreras, Cristina, Prieto, Dolores
• Format: Article
• Language: English
• Subjects: Adenosine kinase; Adenosine monophosphate; AMP; AMPK; Antioxidants; Autophagy; Blood flow; Cardiovascular diseases; Cardiovascular system; Complications; endothelium; Energy balance; Homeostasis; Hypoxia; Inflammation; Ischemia; ischemia/reperfusion; Kinases; Metabolic disorders; Metabolism; Mitochondria; Pathogenesis; Phagocytosis; Protein kinase; reactive oxygen species; Reperfusion; Signal transduction; vascular smooth muscle; Vascular system
• ISSN: 1742-464X; 1742-4658
• DOI: 10.1111/febs.15863

Adenosine monophosphate‐activated protein kinase (AMPK) is a cellular energy sensor activated during energy stress that plays a key role in maintaining energy homeostasis. This ubiquitous signaling pathway has been implicated in multiple functions including mitochondrial biogenesis, redox regulation, cell growth and proliferation, cell autophagy and inflammation. The protective role of AMPK in cardiovascular function and the involvement of dysfunctional AMPK in the pathogenesis of cardiovascular disease have been highlighted in recent years. In this review, we summarize and discuss the role of AMPK in the regulation of blood flow in response to metabolic demand and the basis of the AMPK physiological anticontractile, antioxidant, anti‐inflammatory, and antiatherogenic actions in the vascular system. Investigations by others and us have demonstrated the key role of vascular AMPK in the regulation of endothelial function, redox homeostasis, and inflammation, in addition to its protective role in the hypoxia and ischemia/reperfusion injury. The pathophysiological implications of AMPK involvement in vascular function with regard to the vascular complications of metabolic disease and the therapeutic potential of AMPK activators are also discussed. Adenosine monophosphate‐activated protein kinase (AMPK) is a cellular energy sensor activated under energy‐deficient conditions, by shear stress, hormones, hypoxia, and reactive oxygen species in the vascular wall. AMPK activation triggers intracellular signaling cascades leading to nitric oxide (NO) release, stimulation of endothelial and vascular smooth muscle K+ channels, and the sarco/endoplasmic reticulum Ca2+‐ATPase pump thus producing vasodilation. AMPK also reduces reactive oxygen species production by inhibiting NADPH oxidase enzymes and by favoring mitochondrial autophagy and biogenesis. AMPK suppresses the nuclear factor kappa‐light‐chain enhancer of activated B cells inflammatory pathway. ​