Limited Regeneration Potential with Minimal Epicardial Progenitor Conversions in the Neonatal Mouse Heart after Injury

Using tbx18-MercreMer knockin allele labeling epicardial celss .

Conclusion 1:  new asma labeling coronary vessels are derived from tbx18 and asma labeling cells .

2、Coronary endothelial cells are derived from the pre-existing caridac endothelium.

Amputation criteria: smoothness thickness apical shape and fibrotic tissues