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Learn MoreIn response to various stimuli, vascular smooth muscle cells (SMCs) can de-differentiate, proliferate and migrate in a process known as phenotypic modulation. However, the phenotype of modulated SMCs in vivo during atherosclerosis and the influence of this process on coronary artery disease (CAD) risk have not been clearly established. Using single cell RNA sequencing, we comprehensively characterized the transcriptomic phenotype of modulated SMCs in vivo in atherosclerotic lesions of both mouse and human. We performed CITE-seq in mouse atherosclerotic lesions using antibodies directed against several macrophage surface markers. In the mice, we also performed SMC-specific knockout of TCF21, a causal CAD gene, to determine the effect of this gene on SMC phenotypic modulation. Finally, we performed ChIP-seq for the transcription factor TCF21 in a pooled DNA sample comprised of 52 different human coronary artery smooth muscle cell (HCASMC) lines to determine TCF21 target genes. SOURCE: Thomas Quertermous (tomq1@stanford.edu) - Quertermous Stanford University
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