Abstract
There is a pressing need for new therapeutics for the generation and transplantation of oligodendrocyte to the white matter to help replace and render injured cells that are lost in demyelinating disease. There are a few protocols describing a homogenous derivation of non-manipulated mouse embryonic stem cells to oligodendrocytes (ES-OL). Moreover, protocols that are successful in producing ES-OL do so with low efficiency. Therefore, we describe clear methodology for differentiation of mouse ES cells to oligodendrocyte to a high degree of homogenity and reproducibility in vitro. In addition, taking advantage of three defined media, we can generate a defined ES to oligodendrocyte lineage while selecting against neurons and astrocytes. More specifically, (1) Glial stem cell defining media (GSCDM), supplemented with appropriate combination of SHH and RA support pro-oligodendrocyte developing neural spheres from ES cells, (2) Oligodendrocyte differentiating media, induces lineage selection of oligodendrocytes progenitors from neural stem cells, and (3) Oligodendrocyte maturation media, supports oligodendrocytes progenitor maturation. Moreover, the ES cell derived oligodendrocytes display mature properites in the prescence of rat dorsal root gangila in vitro. Thus confirming thier potential for use to invesitgate developmental pathways and future potential use of cells in transplantation towards myelin repair.
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