Human peripheral blood-derived mesenchymal stem cells with NTRK1 over-expression enhance repairing capability in a rat model of Parkinson's disease.

The potency of mesenchymal stem cells (MSCs) for tissue repair and regeneration is mainly based on their ability to secret beneficial molecules. Administration of MSCs has been proposed as an innovative approach and is proved by a number of clinical trials to a certain degree for the therapy of many diseases including Parkinson's disease (PD). However, the efficacy of MSCs alone is not significant. We investigated the effect of neurotrophic tyrosine receptor kinase 1 (NTRK1) overexpressed peripheral blood MSCs (PB-MSCs) on PD rat model. NTRK1 was overexpressed in PB-MSCs, which were then injected into PD rat model, Dopaminergic (DA) neuron regeneration and rotational performance was assessed. We found that DA neuron repair was increased in lesion site, rotational performance was also improved in MSC transplanted PD rat, with most potent effect in NTRK1 overexpressed PB-MSC transplanted PD rat. Our results indicate that overexpression of NTRK1 in MSCs could be an optimized therapeutic way via MSCs for PD treatment.