Pluripotent stem cells (PSCs) possess self-organizing abilities in 3D culture. This property has been demonstrated in recent studies, including the generation of various neuroectodermal and endodermal tissues. For example, PSCs are able to differentiate into specific type of neural tissues, such as the neocortex and the optic cup, in response to local positional information brought about by signals during embryogenesis. In contrast, the generation of cerebellar tissue from PSCs requires a secondary induction by a signaling center, called the isthmic organizer, which first appears in the cell aggregate in 3D culture. Such developmental complexity of cerebellum has hampered establishment of effective differentiation culture system from PSCs, thus far.
We recently reported that cerebellar neurons are generated from human PSCs (hPSCs). In this chapter, we describe an efficient protocol for differentiation of 3D cerebellar neuroepithelium from hPSCs. We also describe the protocols for further differentiation into specific neurons in the cerebellar cortex, such as Purkinje cells and the granule cells.
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