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Activation of a transient progenitor state in the epicardium is required for zebrafish heart regeneration

The epicardium, a mesothelial cell tissue that encompasses vertebrate hearts, supports heart regeneration after injury through paracrine effects and as a source of multipotent progenitors. However, the progenitor state in the adult epicardium has yet to be defined. Through single-cell RNA-sequencing...

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Published in:Nature communications 2022-12, Vol.13 (1), p.7704-18, Article 7704
Main Authors: Xia, Yu, Duca, Sierra, Perder, Björn, Dündar, Friederike, Zumbo, Paul, Qiu, Miaoyan, Yao, Jun, Cao, Yingxi, Harrison, Michael R. M., Zangi, Lior, Betel, Doron, Cao, Jingli
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container_title Nature communications
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creator Xia, Yu
Duca, Sierra
Perder, Björn
Dündar, Friederike
Zumbo, Paul
Qiu, Miaoyan
Yao, Jun
Cao, Yingxi
Harrison, Michael R. M.
Zangi, Lior
Betel, Doron
Cao, Jingli
description The epicardium, a mesothelial cell tissue that encompasses vertebrate hearts, supports heart regeneration after injury through paracrine effects and as a source of multipotent progenitors. However, the progenitor state in the adult epicardium has yet to be defined. Through single-cell RNA-sequencing of isolated epicardial cells from uninjured and regenerating adult zebrafish hearts, we define the epithelial and mesenchymal subsets of the epicardium. We further identify a transiently activated epicardial progenitor cell (aEPC) subpopulation marked by ptx3a and col12a1b expression. Upon cardiac injury, aEPCs emerge from the epithelial epicardium, migrate to enclose the wound, undergo epithelial-mesenchymal transition (EMT), and differentiate into mural cells and pdgfra + hapln1a + mesenchymal epicardial cells. These EMT and differentiation processes are regulated by the Tgfβ pathway. Conditional ablation of aEPCs blocks heart regeneration through reduced nrg1 expression and mesenchymal cell number. Our findings identify a transient progenitor population of the adult epicardium that is indispensable for heart regeneration and highlight it as a potential target for enhancing cardiac repair. The epicardium supports heart regeneration, though precisely how is unclear. Here the authors define an activated epicardial progenitor population as the source of essential cell types and paracrine factors for successful heart regeneration in zebrafish.
doi_str_mv 10.1038/s41467-022-35433-9
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2041-1723
language eng
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subjects 13/51
14/19
14/32
38
38/32
45/41
45/91
631/136/142
631/443/592/2725
631/443/592/2726
631/532/489
64/116
Ablation
Animals
Cell differentiation
Cell number
Cells (biology)
Danio rerio
Epicardium
Epithelial-Mesenchymal Transition - genetics
Extracellular Matrix Proteins - metabolism
Gene sequencing
Heart
Heart - physiology
Heart Injuries - genetics
Humanities and Social Sciences
Mesenchyme
multidisciplinary
Paracrine signalling
Pericardium
Progenitor cells
Proteoglycans - metabolism
Regeneration
Science
Science (multidisciplinary)
Stem cells
Stem Cells - metabolism
Vertebrates
Zebrafish
Zebrafish - metabolism
Zebrafish Proteins - genetics
Zebrafish Proteins - metabolism
title Activation of a transient progenitor state in the epicardium is required for zebrafish heart regeneration
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