PECAM1 and ischemia reperfusion injury: Additionally, the use of cord blood-derived iPSC differentiated into vascular progenitors expressing endothelial CD31 (cluster of differentiation 31 or platelet endothelial cell adhesion molecule) and markers found on pericytes such as CD146 (cluster of differentiation 146 or melanoma cell adhesion molecule), may be useful in the treatment of DR since these cells intravitreally injected into ischemia-reperfusion injury model demonstrated pericyte localization while intravenously injected were found to be localized primarily in endothelial positions [43].