THY1 and myocardial infarction: Despite producing a CDC population containing about 30% more CD90+ cardiac mesenchymal cells and 12% fewer c-kit+ cardiac progenitor cells than others [5], we found that a single injection of 2×106 CDCs 10 minutes post ischaemia/reperfusion MI and a further bolus of 4×106 CDCs administered systemically 2 days later, homed to the infarcted myocardium and were retained at 16 weeks follow-up.