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

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 the persistent release of specific cytokine by MSCs in vivo, appeared in principle able to contrast the neurodegenerative processes induced by the 6-OHDA lesion. Our results suggest that reciprocal influences between grafted cells and endogenous neural precursors could be important for the observed neurorescue effect on several brain regions. Altogether, our data provide remarkable cues regarding the potential of hMSCs in promoting endogenous reparative mechanisms that may prove applicable and beneficial for PD treatment.

URL: http://www.sciencedirect.com/science/article/pii/S0006899309024950

* Legal Disclaimer: Chelation and Hyperbaric Therapy, Stem Cell Therapy, and other treatments and modalities mentioned or referred to in this web site are medical techniques that may or may not be considered “mainstream”. As with any medical treatment, results will vary among individuals, and there is no implication or guarantee that you will heal or achieve the same outcome as patients herein.

As with any procedure, there could be pain or other substantial risks involved. These concerns should be discussed with your health care provider prior to any treatment so that you have proper informed consent and understand that there are no guarantees to healing.

THE INFORMATION IN THIS WEBSITE IS OFFERED FOR GENERAL EDUCATIONAL PURPOSES ONLY AND DOES NOT IMPLY OR GIVE MEDICAL ADVICE. No Doctor/Patient relationship shall be deemed to have arisen simply by reading the information contained on these pages, and you should consult with your personal physician/care giver regarding your medical treatment before undergoing any sort of treatment or therapy.

Published on 08-22-2014