Resident c-kit(+) cells in the heart are not cardiac stem cells.

Abstract:

:Identifying a bona fide population of cardiac stem cells (CSCs) is a critical step for developing cell-based therapies for heart failure patients. Previously, cardiac c-kit(+) cells were reported to be CSCs with a potential to become myocardial, endothelial and smooth muscle cells in vitro and after cardiac injury. Here we provide further insights into the nature of cardiac c-kit(+) cells. By targeting the c-kit locus with multiple reporter genes in mice, we find that c-kit expression rarely co-localizes with the expression of the cardiac progenitor and myogenic marker Nkx2.5, or that of the myocardial marker, cardiac troponin T (cTnT). Instead, c-kit predominantly labels a cardiac endothelial cell population in developing and adult hearts. After acute cardiac injury, c-kit(+) cells retain their endothelial identity and do not become myogenic progenitors or cardiomyocytes. Thus, our work strongly suggests that c-kit(+) cells in the murine heart are endothelial cells and not CSCs.

journal_name

Nat Commun

journal_title

Nature communications

authors

Sultana N,Zhang L,Yan J,Chen J,Cai W,Razzaque S,Jeong D,Sheng W,Bu L,Xu M,Huang GY,Hajjar RJ,Zhou B,Moon A,Cai CL

doi

10.1038/ncomms9701

subject

Has Abstract

pub_date

2015-10-30 00:00:00

pages

8701

issn

2041-1723

pii

ncomms9701

journal_volume

6

pub_type

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