PDGF signaling is required for epicardial function and blood vessel formation in regenerating zebrafish hearts.
Kim J, Wu Q, Zhang Y, Wiens KM, Huang Y, Rubin N, Shimada H, Handin RI, Chao MY, Tuan TL, et al. Proc Natl Acad Sci U S A. 2010 Oct 5; 107(40):17206-10. Epub 2010 Sep 21.