Key result
Rho-kinase pathway and adventitial inflammation drive coronary artery spasm via vascular smooth muscle hypercontraction.
Why the study?
Limited additional benefits of PCI over optimal medical therapy in stable angina have focused attention on coronary vasomotion abnormalities, motivating a review of mechanisms underlying coronary artery spasm.
Highlights the central role of Rho-kinase and coronary adventitial inflammation in the pathophysiology of coronary artery spasm.
Answers are grounded in this paper and cite their sources.
Does not yet alter coronary spasm management; leaves open Rho-kinase inhibition as a hypothesis-generating therapeutic target.
Recent clinical trials have highlighted that percutaneous coronary intervention in patients with stable angina provides limited additional benefits on top of optimal medical therapy. This has led to much more attention being paid to coronary vasomotion abnormalities regardless of obstructive or non-obstructive arterial segments. Coronary vasomotion is regulated by multiple mechanisms that include the endothelium, vascular smooth muscle cells (VSMCs), myocardial metabolic demand, autonomic nervous system and inflammation. Over the years, several animal models have been developed to explore the central mechanism of coronary artery spasm. This review summarises the landmark studies on the mechanisms of coronary vasospasm demonstrating the central role of Rho-kinase as a molecular switch of VSMC hypercontraction and the important role of coronary adventitial inflammation for Rho-kinase upregulation in VSMCs.
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Nishimiya et al. (2023) conducted a review in Coronary Artery Spasm. Coronary artery spasm is primarily driven by vascular smooth muscle cell hypercontraction mediated by the Rho-kinase pathway and coronary adventitial inflammation.
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