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Circ Res. 2015 Feb 27;116(5):804-15. doi: 10.1161/CIRCRESAHA.116.304269. Epub 2014 Dec 4.

Transcriptional reversion of cardiac myocyte fate during mammalian cardiac regeneration.

Author information

1
From the Harvard Stem Cell Institute, the Brigham Regenerative Medicine Center, and the Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, and the Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA (C.C.O.M., R.A.G., G.M.F., J.B.G., R.T.L.); and Department of Biology, Massachusetts Institute of Technology, Cambridge, MA (J.A.W., V.L.B., A.S., L.A.B.).
2
From the Harvard Stem Cell Institute, the Brigham Regenerative Medicine Center, and the Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, and the Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA (C.C.O.M., R.A.G., G.M.F., J.B.G., R.T.L.); and Department of Biology, Massachusetts Institute of Technology, Cambridge, MA (J.A.W., V.L.B., A.S., L.A.B.). lboyer@mit.edu rlee@partners.org.

Abstract

RATIONALE:

Neonatal mice have the capacity to regenerate their hearts in response to injury, but this potential is lost after the first week of life. The transcriptional changes that underpin mammalian cardiac regeneration have not been fully characterized at the molecular level.

OBJECTIVE:

The objectives of our study were to determine whether myocytes revert the transcriptional phenotype to a less differentiated state during regeneration and to systematically interrogate the transcriptional data to identify and validate potential regulators of this process.

METHODS AND RESULTS:

We derived a core transcriptional signature of injury-induced cardiac myocyte (CM) regeneration in mouse by comparing global transcriptional programs in a dynamic model of in vitro and in vivo CM differentiation, in vitro CM explant model, as well as a neonatal heart resection model. The regenerating mouse heart revealed a transcriptional reversion of CM differentiation processes, including reactivation of latent developmental programs similar to those observed during destabilization of a mature CM phenotype in the explant model. We identified potential upstream regulators of the core network, including interleukin 13, which induced CM cell cycle entry and STAT6/STAT3 signaling in vitro. We demonstrate that STAT3/periostin and STAT6 signaling are critical mediators of interleukin 13 signaling in CMs. These downstream signaling molecules are also modulated in the regenerating mouse heart.

CONCLUSIONS:

Our work reveals new insights into the transcriptional regulation of mammalian cardiac regeneration and provides the founding circuitry for identifying potential regulators for stimulating heart regeneration.

KEYWORDS:

cardiac myocyte; gene expression; growth factors/cytokines; myogenesis; regeneration

PMID:
25477501
PMCID:
PMC4344930
DOI:
10.1161/CIRCRESAHA.116.304269
[Indexed for MEDLINE]
Free PMC Article

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