The effect of hypoxia preconditioning on the neural and stemness genes expression profiling in human umbilical cord blood mesenchymal stem cells.

In recent years, human umbilical cord blood-derived mesenchymal stem cell (hUB-MSCs) has been regarded as an alternative source for stem cell therapy. In this study, we evaluated the effect of hypoxia preconditioning (HPC) on the expression of Nt-3, GFAP, Nestin, Oct-4 and Nanog genes and proliferative capacity of hUB-MSCs in comparison with normoxic conditions. HPC+Hypoxia protocol includes cultured hUB-MSCs for 15min at 2.5% O2 and after that reoxygenation for 30min at 21% O2 (HPC), and then hypoxia preconditioned hUB-MSCs subjected to 2.5% O2 for 72h (Hypoxia). Conclusively, the results showed that hypoxic preconditioning is an effective strategy for enhancing proliferation capacity of hUB-MSCs, and also can trigger expression of some of the neural genes. In addition, the concept of involvement of oxygen tension in the expression of some of the neural genes of hUB-MSCs would be a good sign of enhanced neural differentiation potential in vitro.