Abstract
The goal of this study was to increase the dopamine content and reduce dopaminergic metabolites in the brain of Parkinson's disease rats. Using high-performance liquid chromatography, we found that dopamine and dopaminergic metabolite (dihydroxyphenylacetic acid and homovanillic acid) content in the midbrain of Parkinson's disease rats was increased after neural stem cell transplantation + Zhichan decoction, compared with neural stem cell transplantation alone. Our genetic algorithm results show that dihydroxyphenylacetic acid and homovanillic acid levels achieve global optimization. Neural stem cell transplantation + Zhichan decoction increased dihydroxyphenylacetic acid levels up to 10-fold, while transplantation alone resulted in a 3-fold increment. Homovanillic acid levels showed no apparent change. Our experimental findings show that after neural stem cell transplantation in Parkinson's disease rats, Zhichan decoction can promote differentiation of neural stem cells into dopaminergic neurons.
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