Analysis of cardiomyocyte clonal expansion during mouse heart development and injury.

Abstract:

:The cellular mechanisms driving cardiac tissue formation remain poorly understood, largely due to the structural and functional complexity of the heart. It is unclear whether newly generated myocytes originate from cardiac stem/progenitor cells or from pre-existing cardiomyocytes that re-enter the cell cycle. Here, we identify the source of new cardiomyocytes during mouse development and after injury. Our findings suggest that cardiac progenitors maintain proliferative potential and are the main source of cardiomyocytes during development; however, the onset of αMHC expression leads to reduced cycling capacity. Single-cell RNA sequencing reveals a proliferative, "progenitor-like" population abundant in early embryonic stages that decreases to minimal levels postnatally. Furthermore, cardiac injury by ligation of the left anterior descending artery was found to activate cardiomyocyte proliferation in neonatal but not adult mice. Our data suggest that clonal dominance of differentiating progenitors mediates cardiac development, while a distinct subpopulation of cardiomyocytes may have the potential for limited proliferation during late embryonic development and shortly after birth.

journal_name

Nat Commun

journal_title

Nature communications

authors

Sereti KI,Nguyen NB,Kamran P,Zhao P,Ranjbarvaziri S,Park S,Sabri S,Engel JL,Sung K,Kulkarni RP,Ding Y,Hsiai TK,Plath K,Ernst J,Sahoo D,Mikkola HKA,Iruela-Arispe ML,Ardehali R

doi

10.1038/s41467-018-02891-z

subject

Has Abstract

pub_date

2018-02-21 00:00:00

pages

754

issue

1

issn

2041-1723

pii

10.1038/s41467-018-02891-z

journal_volume

9

pub_type

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