In pre-clinical experiments, hESC - derived cardiomyocytes engraft in damaged myocardium and appear to behave like native cells; hESC - derived
islet cells engraft, produce the hormones of the endocrine pancreas, and appear to do so under homeostatic control; etc. \ n \ nThere is no evidence of teratomas from differentiated hESC - derived cells and minimal, if any, immune rejection.