Abstract
Atherosclerosis is a chronic and progressive process. It is the most important pathological basis of cardiovascular disease and stroke. Vascular smooth muscle cells (VSMCs) are an essential cell type in atherosclerosis. Previous studies have revealed that VSMCs undergo phenotypic transformation in atherosclerosis to participate in the retention of atherogenic lipoproteins as well as the formation of the fibrous cap and the underlying necrotic core in plaques. The emergence of lineage-tracing studies indicates that the function and number of VSMCs in plaques have been greatly underestimated. In addition, recent studies have revealed that VSMCs make up at least 50% of the foam cell population in human and mouse atherosclerotic lesions. Therefore, understanding the formation of lipid-loaded VSMCs and their regulatory mechanisms is critical to elucidate the pathogenesis of atherosclerosis and to explore potential therapeutic targets. Moreover, combination of many complementary technologies such as lineage tracing, single-cell RNA sequencing (scRNA-seq), flow cytometry, and mass cytometry (CyTOF) with immunostaining has been performed to further understand the complex VSMC function. Correct identification of detrimental and beneficial processes may reveal successful therapeutic treatments targeting VSMCs and their derivatives during atherosclerosis. The purpose of this review is to summarize the process of lipid-loaded VSMC formation in atherosclerosis and to describe novel insight into VSMCs gained by using multiple advanced methods.
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Funding
This work was supported by National Natural Science Foundation of China (No. 82090044 to B.H, No.81820108010 to B.H, No.82001271 to J.H.W.) and National Key R&D Program of China (No. 2018YFC1312200).
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Yu-xiao Liu and Pei-zhe Yuan had the idea and performed the literature search. Jie-hong Wu and Bo Hu drafted and revised the article.
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Liu, Yx., Yuan, Pz., Wu, Jh. et al. Lipid accumulation and novel insight into vascular smooth muscle cells in atherosclerosis. J Mol Med 99, 1511–1526 (2021). https://doi.org/10.1007/s00109-021-02109-8
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DOI: https://doi.org/10.1007/s00109-021-02109-8