The invention provides a method for
ex vivo expansion of human vascular endothelial
progenitor cells in a
low oxygen condition. The method comprises the following steps: separating EPCs from
human bone marrow, culturing the EPCs in an
incubator in the
low oxygen condition, and ensuring that the
low oxygen condition adopts a 1 percent O2 low
oxygen condition.
Gene expression to the EPCs by the lowoxygen condition comprises various
gene differential expression, and at least relates to the following biological processes: reaction of cells to
fatty acid, and adjustment of positive regulation of the activity of
ubiquitin-
protein ligase with transformed caryomitosis
cell cycles. Compared with normoxia culture, the culture method has the advantages that low
oxygen environment is more similar tobone marrow microenvironment, and is more beneficial to keeping the primary characteristics of the EPCs; the method performs
molecular level evaluation on change of
gene expression in EPCs caused by different culture methods, gives
differential expression genes in which the low
oxygen condition or anoxic condition affects
cell dryness and molecular pathways of the
differential expression genes, and is applied to improvement of the current stem cells.