(英文)
3.3Results
3.3.1 Differentiation potential of cells in vitro
When representative bone marrow derived spheres were dissociated into single cells and exposed to three different differentiation media, the cells differentiated to express specific genes of the three lineages, Map2 (ectoderm), MyoD (mesoderm) and alpha-fetoprotein (AFP, endoderm) (Fig. 10).The addition of a neural differentiation medium to the in vitro environment of cells from bone marrow spheres, resulted in expression of pIII tubulin (a marker for neuron) (Fig. 11).
Alternatively, the addition of 20% fetal calf serum to the media resulted in the expression of markers representative of mesoderm; that is, a-smooth muscle actin (Fig. 11) as well as the mesenchymal cells, chondrocytes, osteocytes and adipocytes (Fig. 12). Thus, cells from spheres differentiated into all cell types of neural (neurons, oligodendrocytes and ghas) and mesenchymal stem cell lineage (chondrocytes, osteocytes and adipocytes). When exposed to a hepatocyte differentiation media the expression of a-fetoprotein (Fig. 11), was seen, suggestive of differentiation into endodermal tissue.
