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Brazilian Journal of Cardiovascular Surgery
On-line version ISSN 1678-9741
KAWASAKI-OYAMA, Rosa Sayoko et al. Blood mesenchymal stem cell culture from the umbilical cord with and without Ficoll-Paque density gradient method. Rev Bras Cir Cardiovasc [online]. 2008, vol.23, n.1, pp.29-34. ISSN 1678-9741. http://dx.doi.org/10.1590/S0102-76382008000100006.
OBJECTIVES: Implantation of cell separation and mesenchymal stem cell culture techniques from human umbilical cord blood with and without using the Ficoll-Paque gradient density method (d=1.077g/ml). METHODS: Ten samples of the umbilical cord blood obtained from full-term deliveries were submitted to two different procedures of mesenchymal stem cell culture: a) Method without the Ficoll-Paque density gradient, which concentrates all nucleated cells; b) Method with the Ficoll-Paque density gradient, which selects only low-density mononuclear cells. Cells were initially plated into 25 cm2 cultures flasks at a density of 1x107 nucleated cells/cm2 and 1x106 mononuclear cells/cm2. RESULTS: It was obtained 2-13x107 (median = 2.35x107) nucleated cells/cm2 by the method without the Ficoll-Paque gradient density, and 3.7-15.7x106 (median = 7.2x106) mononuclear cells/cm2 by the method with the Ficoll-Paque gradient density. In all cultures adherent cells were observed 24 hours after being cultured. Cells presented fibroblastoid and epithelioid morphology. In most of the cultures, cell proliferation occurred in the first week, but after the second week only some cultures - derived from the method without the Ficoll-Paque gradient density - maintained the growth rate reaching confluence. Those cultures were submitted to trypsinization with 0.25% trypsin/EDTA solution and cultured for two to three months. CONCLUSION: In the samples analyzed, cell separation and mesenchymal stem cell culture techniques from human umbilical cord blood by the method without the Ficoll-Paque density gradient was more efficient than the method with the Ficoll-Paque density gradient.
Keywords : Umbilical cord blood; Mesenchymal stem cells [cytology]; Cells, cultured; Cell culture techniques.