The present disclosure is directed to improved methods for efficiently
producing neuroprogenitor cells and differentiated neural cells such as
dopaminergic neurons and serotonergic neurons from pluripotent stem
cells, for example human embryonic stem cells. Using the disclosed
methods, cell populations containing a high proportion of cells positive
for tyrosine hydroxylase, a specific marker for dopaminergic neurons,
have been isolated. The neuroprogenitor cells and terminally
differentiated cells of the present disclosure can be generated in large
quantities, and therefore may serve as an excellent source for cell
replacement therapy in neurological disorders such as Parkinson's
disease.