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- W4362657921 abstract "To improve our limited understanding of the pathogenesis of thoracic aortic aneurysm (TAA) leading to acute aortic dissection, single-cell RNA sequencing (scRNA-seq) was employed to profile disease-relevant transcriptomic changes of aortic cell populations in a well-characterized mouse model of the most commonly diagnosed form of Marfan syndrome (MFS). As result, two discrete sub-populations of aortic cells (SMC3 and EC4) were identified only in the aorta of Fbn1mgR/mgR mice. SMC3 highly express genes related to extracellular matrix formation and nitric oxide signaling, whereas EC4 transcriptional profile is enriched in SMC, fibroblast, and immune cell-related genes. Trajectory analysis predicted close phenotypic modulation between SMC3 and EC4, which were therefore analyzed together as a discrete MFS-modulated (MFSmod) sub-population. In situ hybridizations of diagnostic transcripts located MFSmod cells to the intima of Fbn1mgR/mgR aortas. Reference-based dataset integration revealed transcriptomic similarity between MFSmod and an SMC-derived cell cluster modulated in human TAA. Consistent with angiotensin II type I receptor (At1r) contribution to TAA development, MFSmod cells were absent in the aorta of Fbn1mgR/mgR mice treated with the At1r antagonist losartan. Altogether, our findings indicate that a discrete dynamic alteration of aortic cell identity is associated with dissecting TAA in MFS mice and increased risk of aortic dissection in MFS patients." @default.
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- W4362657921 date "2023-05-22" @default.
- W4362657921 modified "2023-10-14" @default.
- W4362657921 title "Dissecting aortic aneurysm in Marfan syndrome is associated with losartan-sensitive transcriptomic modulation of aortic cells" @default.
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- W4362657921 doi "https://doi.org/10.1172/jci.insight.168793" @default.
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