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Marfan syndrome rats

ABSTRACT: Marfan syndrome rat aorta

PROVIDER: PRJEB33334 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR3415680.fastq.gz	Fastqsanger.gz
	ERR3415690.fastq.gz	Fastqsanger.gz
	ERR3415681.fastq.gz	Fastqsanger.gz
	ERR3415691.fastq.gz	Fastqsanger.gz
	ERR3415682.fastq.gz	Fastqsanger.gz

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Aortic smooth muscle cell phenotype modulation during Marfan syndrome aneurysm formation

Project description:We report dynamic temporal and spatial smooth muscle cell phenotype modulation using aortic single cell RNA sequencing in a murine model of Marfan syndrome (Fbn1C1041G/+) and littermate controls. Aortic root/ascending aortic tissue samples from both genotypes were studied at 4 and 24 weeks of age. The non-aneurysmal descending thoracic aorta was also studied at 24 weeks. Finally human aortic tissue from a Marfan syndrome patient undergoing aneurysm repair surgery was studied.

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Project description:To improve our limited understanding of the pathogenesis of thoracic aortic aneurysm (TAA) leading to acute aortic dissection, we used single-cell RNA sequencing 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,MFSmod were identified only in the aorta of Fbn1mgR/mgR mice. In situ hybridizations of diagnostic transcripts located MFSmod cells to the intima of Fbn1mgR/mgR aortas. 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.

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