Extracellular traps from activated vascular smooth muscle cells drive the progression of atherosclerosis

Ming Zhai, Shiyu Gong, Peipei Luan, Yefei Shi, Wenxin Kou, Yanxi Zeng, Jiayun Shi, Guanye Yu, Jiayun Hou, Qing Yu, Weixia Jian, Jianhui Zhuang, Mark W. Feinberg and Wenhui Peng ()
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Ming Zhai: School of Medicine
Shiyu Gong: School of Medicine
Peipei Luan: School of Medicine
Yefei Shi: School of Medicine
Wenxin Kou: School of Medicine
Yanxi Zeng: School of Medicine
Jiayun Shi: School of Medicine
Guanye Yu: School of Medicine
Jiayun Hou: Fudan University
Qing Yu: School of Medicine
Weixia Jian: School of Medicine
Jianhui Zhuang: School of Medicine
Mark W. Feinberg: Harvard Medical School
Wenhui Peng: School of Medicine

Nature Communications, 2022, vol. 13, issue 1, 1-15

Abstract: Abstract Extracellular DNA traps (ETs) represent an immune response by which cells release essential materials like chromatin and granular proteins. Previous studies have demonstrated that the transdifferentiation of vascular smooth muscle cells (VSMCs) plays a crucial role in atherosclerosis. This study seeks to investigate the interaction between CD68+ VSMCs and the formation of ETs and highlight its function in atherosclerosis. Here we show that ETs are inhibited, and atherosclerotic plaque formation is alleviated in male Myh11CrePad4flox/flox mice undergoing an adeno-associated-virus-8 (AAV8) mediating overexpression of proprotein convertase subtilisin/kexin type 9 mutation (PCSK9) injection and being challenged with a high-fat diet. Obvious ETs generated from CD68+ VSMCs are inhibited by Cl-amidine and DNase I in vitro. By utilizing VSMCs-lineage tracing technology and single-cell RNA sequencing (scRNA-seq), we demonstrate that the ETs from CD68+ VSMCs influence the progress of atherosclerosis by regulating the direction of VSMCs’ transdifferentiation through STING-SOCS1 or TLR4 signaling pathway.

Date: 2022
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DOI: 10.1038/s41467-022-35330-1

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