HES cells that were exposed to both sonic hedgehog and fibroblast growth factor 8 with
telomerase-immortalized human fetal midbrain astrocytes. These astrocytes substantially
potentiated dopaminergic neurogenesis by both WA09 and WA01 HES cells, biasing them
to the A9 nigrostriatal phenotype. When transplanted into the neostriata of 6-
hydroxydopamine–lesioned parkinsonian rats, the dopaminergic implants yielded a …