C3orf58, a Novel Paracrine Protein, Stimulates Cardiomyocyte Cell...

The regenerative capacity of the heart is markedly diminished shortly after birth coinciding with overall withdrawal of cardiomyocytes from cell cycle.

http://circres.ahajournals.org/content/early/2013/06/19/CIRCRESAHA.113.301075.short?rss=1