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Proc Natl Acad Sci U S A. 2013 Aug 13;110(33):13416-21. doi: 10.1073/pnas.1309810110. Epub 2013 Jul 30.

Translational profiling of cardiomyocytes identifies an early Jak1/Stat3 injury response required for zebrafish heart regeneration.

Author information

1
Department of Cell Biology and Howard Hughes Medical Institute, Duke University Medical Center, Durham, NC 27710, USA.

Abstract

Certain lower vertebrates like zebrafish activate proliferation of spared cardiomyocytes after cardiac injury to regenerate lost heart muscle. Here, we used translating ribosome affinity purification to profile translating RNAs in zebrafish cardiomyocytes during heart regeneration. We identified dynamic induction of several Jak1/Stat3 pathway members following trauma, events accompanied by cytokine production. Transgenic Stat3 inhibition in cardiomyocytes restricted injury-induced proliferation and regeneration, but did not reduce cardiogenesis during animal growth. The secreted protein Rln3a was induced in a Stat3-dependent manner by injury, and exogenous Rln3 delivery during Stat3 inhibition stimulated cardiomyocyte proliferation. Our results identify an injury-specific cardiomyocyte program essential for heart regeneration.

KEYWORDS:

TRAP; cardiac regeneration; endocardium; inflammation; interleukin

PMID:
23901114
PMCID:
PMC3746860
DOI:
10.1073/pnas.1309810110
[Indexed for MEDLINE]
Free PMC Article

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