Previous research has confirmed that hematopoietic cells and endothelial cells originate in a common mesodermal precursor named as hemangioblast at specific time and locations during embryonic development. Hematopoiet...Previous research has confirmed that hematopoietic cells and endothelial cells originate in a common mesodermal precursor named as hemangioblast at specific time and locations during embryonic development. Hematopoietic cells and endothelial cells were originated gradually from hemangioblast by specialization, determination and differentiation step by step. The author reviews the origin, markers, commitment, and differentiation of hemangioblast, and presents some research evidence on the transcriptional factors and influencing genes for the specialization of hemangioblast. Further research on specialization genes of the hemangioblast will be critical for a better understanding of the events involved in hematopoietic and endothelial cell differentiation as well as for utilizing this cell population for clinical applications.展开更多
Research has shown that cells from adult fat tissue can effect long-term blood reconstitution. Fat-derived multipotentiality was ascribed to CD34+ perivascular populations from its prominent microvasculature, that rep...Research has shown that cells from adult fat tissue can effect long-term blood reconstitution. Fat-derived multipotentiality was ascribed to CD34+ perivascular populations from its prominent microvasculature, that represent mostly non-hemogenic, mesenchymal cells, although this tissue contains a CD34+45+ subset committed to a hemogenic fate. Here, in order to analyze cell subsets presenting hemogenic capabilities within fat, CD133/1+ and pericytes, the latter defined by CD140b (PDGFRb, Platelet-Derived Growth Factor Receptor Beta) expression, were immunomagnetically selected from stromal-vascular fractions (SVF). In Vitro Colony Forming Unit (CFU) assays were negative for CD140b+ pericytes and positive for CD133/1+ cells when a prolonged CFU assay was performed, revealing fat as another store of primitive progenitors that retain hemogenic potential.展开更多
文摘Previous research has confirmed that hematopoietic cells and endothelial cells originate in a common mesodermal precursor named as hemangioblast at specific time and locations during embryonic development. Hematopoietic cells and endothelial cells were originated gradually from hemangioblast by specialization, determination and differentiation step by step. The author reviews the origin, markers, commitment, and differentiation of hemangioblast, and presents some research evidence on the transcriptional factors and influencing genes for the specialization of hemangioblast. Further research on specialization genes of the hemangioblast will be critical for a better understanding of the events involved in hematopoietic and endothelial cell differentiation as well as for utilizing this cell population for clinical applications.
文摘Research has shown that cells from adult fat tissue can effect long-term blood reconstitution. Fat-derived multipotentiality was ascribed to CD34+ perivascular populations from its prominent microvasculature, that represent mostly non-hemogenic, mesenchymal cells, although this tissue contains a CD34+45+ subset committed to a hemogenic fate. Here, in order to analyze cell subsets presenting hemogenic capabilities within fat, CD133/1+ and pericytes, the latter defined by CD140b (PDGFRb, Platelet-Derived Growth Factor Receptor Beta) expression, were immunomagnetically selected from stromal-vascular fractions (SVF). In Vitro Colony Forming Unit (CFU) assays were negative for CD140b+ pericytes and positive for CD133/1+ cells when a prolonged CFU assay was performed, revealing fat as another store of primitive progenitors that retain hemogenic potential.