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1. Single-Cell Gene-Regulatory Networks of Advanced Symptomatic Atherosclerosis

Author

Centraal Diagnostisch Laboratorium, Circulatory Health, CDL Onderzoek Pasterkamp, Experimentele Afd. Cardiologie 1, Child Health, Mocci, Giuseppe, Sukhavasi, Katyayani, Örd, Tiit, Bankier, Sean, Singha, Prosanta, Arasu, Uma Thanigai, Agbabiaje, Olayinka Oluwasegun, Mäkinen, Petri, Ma, Lijiang, Hodonsky, Chani J., Aherrahrou, Redouane, Muhl, Lars, Liu, Jianping, Gustafsson, Sonja, Byandelger, Byambajav, Wang, Ying, Koplev, Simon, Lendahl, Urban, Owens, Gary K., Leeper, Nicholas J., Pasterkamp, Gerard, Vanlandewijck, Michael, Michoel, Tom, Ruusalepp, Arno, Hao, Ke, Ylä-Herttuala, Seppo, Väli, Marika, Järve, Heli, Mokry, Michal, Civelek, Mete, Miller, Clint J., Kovacic, Jason C., Kaikkonen, Minna U., Betsholtz, Christer, Björkegren, Johan L.M., Centraal Diagnostisch Laboratorium, Circulatory Health, CDL Onderzoek Pasterkamp, Experimentele Afd. Cardiologie 1, Child Health, Mocci, Giuseppe, Sukhavasi, Katyayani, Örd, Tiit, Bankier, Sean, Singha, Prosanta, Arasu, Uma Thanigai, Agbabiaje, Olayinka Oluwasegun, Mäkinen, Petri, Ma, Lijiang, Hodonsky, Chani J., Aherrahrou, Redouane, Muhl, Lars, Liu, Jianping, Gustafsson, Sonja, Byandelger, Byambajav, Wang, Ying, Koplev, Simon, Lendahl, Urban, Owens, Gary K., Leeper, Nicholas J., Pasterkamp, Gerard, Vanlandewijck, Michael, Michoel, Tom, Ruusalepp, Arno, Hao, Ke, Ylä-Herttuala, Seppo, Väli, Marika, Järve, Heli, Mokry, Michal, Civelek, Mete, Miller, Clint J., Kovacic, Jason C., Kaikkonen, Minna U., Betsholtz, Christer, and Björkegren, Johan L.M.

Published
2024

2. Single-Cell Gene-Regulatory Networks of Advanced Symptomatic Atherosclerosis.

Author

Mocci G, Sukhavasi K, Örd T, Bankier S, Singha P, Arasu UT, Agbabiaje OO, Mäkinen P, Ma L, Hodonsky CJ, Aherrahrou R, Muhl L, Liu J, Gustafsson S, Byandelger B, Wang Y, Koplev S, Lendahl U, Owens GK, Leeper NJ, Pasterkamp G, Vanlandewijck M, Michoel T, Ruusalepp A, Hao K, Ylä-Herttuala S, Väli M, Järve H, Mokry M, Civelek M, Miller CJ, Kovacic JC, Kaikkonen MU, Betsholtz C, and Björkegren JLM

Subjects
Humans, Animals, Mice, Myocytes, Smooth Muscle metabolism, Myocytes, Smooth Muscle pathology, Male, Plaque, Atherosclerotic, Disease Progression, Female, Macrophages metabolism, Macrophages pathology, Mice, Knockout, Receptors, LDL genetics, Receptors, LDL metabolism, Mice, Inbred C57BL, Muscle, Smooth, Vascular metabolism, Muscle, Smooth, Vascular pathology, Single-Cell Analysis, Gene Regulatory Networks, Atherosclerosis genetics, Atherosclerosis metabolism, Atherosclerosis pathology
Abstract

Background: While our understanding of the single-cell gene expression patterns underlying the transformation of vascular cell types during the progression of atherosclerosis is rapidly improving, the clinical and pathophysiological relevance of these changes remains poorly understood., Methods: Single-cell RNA sequencing data generated with SmartSeq2 (≈8000 genes/cell) in 16 588 single cells isolated during atherosclerosis progression in Ldlr -/- Apob 100/100 mice with human-like plasma lipoproteins and from humans with asymptomatic and symptomatic carotid plaques was clustered into multiple subtypes. For clinical and pathophysiological context, the advanced-stage and symptomatic subtype clusters were integrated with 135 tissue-specific (atherosclerotic aortic wall, mammary artery, liver, skeletal muscle, and visceral and subcutaneous, fat) gene-regulatory networks (GRNs) inferred from 600 coronary artery disease patients in the STARNET (Stockholm-Tartu Atherosclerosis Reverse Network Engineering Task) study., Results: Advanced stages of atherosclerosis progression and symptomatic carotid plaques were largely characterized by 3 smooth muscle cells (SMCs), and 3 macrophage subtype clusters with extracellular matrix organization/osteogenic (SMC), and M1-type proinflammatory/Trem2-high lipid-associated (macrophage) phenotypes. Integrative analysis of these 6 clusters with STARNET revealed significant enrichments of 3 arterial wall GRNs: GRN33 (macrophage), GRN39 (SMC), and GRN122 (macrophage) with major contributions to coronary artery disease heritability and strong associations with clinical scores of coronary atherosclerosis severity. The presence and pathophysiological relevance of GRN39 were verified in 5 independent RNAseq data sets obtained from the human coronary and aortic artery, and primary SMCs and by targeting its top-key drivers, FRZB and ALCAM in cultured human coronary artery SMCs., Conclusions: By identifying and integrating the most gene-rich single-cell subclusters of atherosclerosis to date with a coronary artery disease framework of GRNs, GRN39 was identified and independently validated as being critical for the transformation of contractile SMCs into an osteogenic phenotype promoting advanced, symptomatic atherosclerosis., Competing Interests: Disclosures J.L.M. Björkegren and A. Ruusalepp are shareholders of Clinical Gene Networks AB (CGN) that has an invested interest in STARNET.

Published
2024
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