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Department of Neurology, Jichi Medical School, 3311-1 Yakushiji, Minami-kawachi, Tochigi, Japan 3290498. muramats@jichi.ac.jp
The recombinant adeno-associated viral (rAAV) vector is a powerful tool for delivering therapeutic genes into mammalian brains. In rodents and non-human primates, a substantial number of striatal neurons can be transduced with high titer rAAV vectors by simple stereotaxic injection. Efficient and long-term expression of genes for dopamine (DA)-synthesizing enzymes in the striatum restored local DA production and achieved behavioral recovery in animal models of Parkinson's disease (PD). Moreover, sustained expression of a glial cell line-derived neurotrophic factor gene in the striatum rescued nigral neurons and led to functional recovery in a rat model of PD, even when treatment was delayed until after the onset of progressive degeneration. These results suggest that gene therapy using rAAV vectors may become a novel and feasible treatment for PD.
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