Example 9
Thus, studies were conducted to search for the reason that the cell cultured in the present serum composition does not induce blood coagulation easily. The concentration of a tissue factor pathway inhibitor (TFPI), which is a strong anticoagulate factor secreted by cells and bound to the plasma membrane, in the culture supernatant of mesenchymal stem cells derived from human amnion membrane (passage number 4) and cultured in aMEM medium added with the present serum composition by 10% of the medium was measured using an ELISA kit (Human TFPI Quantikine ELISA Kit) (DTFP10, R&D systems). As the control, the culture supernatant of the same cells cultured in aMEM medium added with fetal bovine serum by 10% of the medium and these media before cell culture. The results are shown in Table 33.
The mesenchymal stem cells derived from human amnion membrane cultured in the present serum composition secreted more TFPI as compared to fetal bovine serum. Thus, it was found that they do not easily induce blood coagulation.