In a rat model of reperfused myocardial infarction, it has recently been shown that intramyocardial injection of human umbilical cord-blood derived somatic stromal cells induced a significant thickening of the left ventricular wall with cTnT+/BrdU+ cardiomyocytes, which was mediated by a T-Cell driven regenerative response from endogenous cardiomyocytes (39). This evidence concerns the gene TNNT2 and myocardial infarction.