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lüll Circulating very small embryonic-like stem cells in cardiovascular disease Wojakowski W; Kucia M; Liu R; Zuba-Surma E; Jadczyk T; Bachowski R; Nabialek E; Kazmierski M; Ratajczak MZ; Tendera MJ Cardiovasc Transl Res 2011[Apr]; 4 (2): 138-44Very small embryonic-like cells (VSELs) are a population of stem cells residing in the bone marrow (BM) and several organs, which undergo mobilization into peripheral blood (PB) following acute myocardial infarction and stroke. These cells express markers of pluripotent stem cells (PSCs), such as Oct-4, Nanog, and SSEA-1, as well as early cardiac, endothelial, and neural tissue developmental markers. VSELs can be effectively isolated from the BM, umbilical cord blood, and PB. Peripheral blood and BM-derived VSELs can be expanded in co-culture with C2C12 myoblast feeder layer and undergo differentiation into cells from all three germ layers, including cardiomyocytes and vascular endothelial cells. Isolation of VSLEs using fluorescence-activated cell sorting multiparameter live cell sorting system is dependent on gating strategy based on their small size and expression of PSC and absence of hematopoietic lineage markers. VSELs express early cardiac and endothelial lineages markers (GATA-4, Nkx2.5/Csx, VE-cadherin, and von Willebrand factor), SDF-1 chemokine receptor CXCR4, and undergo rapid mobilization in acute MI and ischemic stroke. Experiments in mice showed differentiation of BM-derived VSELs into cardiac myocytes and effectiveness of expanded and pre-differentiated VSLEs in improvement of left ventricular ejection fraction after myocardial infarction.|*Cell Size[MESH]|*Stem Cell Transplantation[MESH]|Animals[MESH]|Biomarkers/metabolism[MESH]|Cardiovascular Diseases/metabolism/pathology/physiopathology/*surgery[MESH]|Cell Culture Techniques[MESH]|Cell Differentiation[MESH]|Cell Lineage[MESH]|Cell Movement[MESH]|Cell Separation/methods[MESH]|Embryonic Stem Cells/metabolism/pathology/*transplantation[MESH]|Flow Cytometry[MESH]|Humans[MESH]|Myocardium/metabolism/*pathology[MESH]|Recovery of Function[MESH]|Regeneration[MESH]|Stroke Volume[MESH]|Treatment Outcome[MESH]|Ventricular Function, Left[MESH] |