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RNA-seq of injured mouse hearts depleted for myofibroblast Yap and Wwtr1

ABSTRACT: A myofibroblast specific tamoxifen inducible Cre was used to assess the role of Yap and Wwtr1 in the mouse heart after myocardial infarction

ORGANISM(S): Mus musculus

PROVIDER: GSE163612 | GEO | 2022/10/29

REPOSITORIES: GEO

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RNA-Seq of injured mouse hearts depleted for myofibroblast Yap [I]

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Assessing the effect of myofibroblast depletion for Yap and Wwtr1 by single Cell RNAsequencing within ventricular interstitial cells 6 days post surgical MI.

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Genetic lineage tracing defines myofibroblast origin and function in the injured heart

Project description:Cardiac fibroblasts convert to myofibroblasts with injury to mediate healing after acute myocardial infarction and to mediate long-standing fibrosis with chronic disease. Myofibroblasts remain a poorly defined cell-type in terms of their origins and functional effects in vivo. Methods: Here we generate Postn (periostin) gene-targeted mice containing a tamoxifen inducible Cre for cellular lineage tracing analysis. This Postn allele identifies essentially all myofibroblasts within the heart and multiple other tissues. Results: Lineage tracing with 4 additional Cre-expressing mouse lines shows that periostin-expressing myofibroblasts in the heart derive from tissue-resident fibroblasts of the Tcf21 lineage, but not endothelial, immune/myeloid or smooth muscle cells. Deletion of periostin+ myofibroblasts reduces collagen production and scar formation after myocardial infarction. Periostin-traced myofibroblasts also revert back to a less activated state upon injury resolution. Conclusions: Our results define the myofibroblast as a periostin-expressing cell-type necessary for adaptive healing and fibrosis in the heart, which arises from Tcf21+ tissue-resident fibroblasts. Fluidigm C1 whole genome transcriptome analysis of lineage mapped cardiac myofibroblasts

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