Multiple neurogenic and neurorescue effects of human mesenchymal stem cell after transplantation in an experimental model of Parkinson's disease

Brain Research
Lidia CovaFabio Blandini

Abstract

Stimulation of endogenous repair in neurodegenerative diseases, such as Parkinson's disease (PD), appears to be a novel and promising therapeutic application of stem cells (SCs). In fact SCs could propel local microenvironmental signals to sustain active endeavors for damaged neurons substitution, normally failing in non-supportive pathological surroundings. In this study, we demonstrated that two different doses of naïve human adult mesenchymal stem cells (hMSCs), implanted in the striatum of rats lesioned with 6-hydroxydopamine (6-OHDA), positively survived 23 days after transplantation. Their fate was directly influenced by the surrounding host environment while grafted hMSCs, dose dependently, regionally sustained the survival of striatal/nigral dopaminergic terminals and enhanced neurogenesis in the Subventricular Zone (SVZ). The number of proliferative cells (Ki67/Proliferating Cell Nuclear Antigen +) as well as neuroblasts migration significantly augmented in the lesioned striatum of transplanted animals compared to controls. No SVZ astrogenesis was detected in all experimental conditions, irrespectively of graft presence. Activation of endogenous stem cell compartments and rescue of dopaminergic neurons, supported by th...Continue Reading

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