Human Neural Stem Cells Survive Long Term in the Midbrain of Dopamine-Depleted Monkeys After GDNF Overexpression and Project Neurites Toward an Appropriate Target
Autor: | Dustin R. Wakeman, R. Jude Samulski, Csaba Leranth, Hemraj B. Dodiya, John R. Sladek, D. Eugene Redmond, Yang D. Teng, Evan Y. Snyder |
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Rok vydání: | 2014 |
Předmět: |
Time Factors
Cell Survival Neurogenesis Genetic Vectors Nigrostriatal pathway Substantia nigra Fetal and Neonatal Stem Cells Regenerative Medicine Transfection Cell Line chemistry.chemical_compound Neural Stem Cells Mesencephalon Transduction Genetic Neurotrophic factors Chlorocebus aethiops Neurites Glial cell line-derived neurotrophic factor medicine Animals Humans Cell Lineage Glial Cell Line-Derived Neurotrophic Factor Stem Cell Niche Cell Shape biology MPTP MPTP Poisoning Genetic Therapy Cell Biology General Medicine Anatomy Dependovirus Neural stem cell Up-Regulation Cell biology Disease Models Animal medicine.anatomical_structure nervous system chemistry 1-Methyl-4-phenyl-1 2 3 6-tetrahydropyridine biology.protein Stem cell Developmental Biology |
Zdroj: | Stem Cells Translational Medicine. 3:692-701 |
ISSN: | 2157-6580 2157-6564 |
Popis: | Transplanted multipotent human fetal neural stem cells (hfNSCs) significantly improved the function of parkinsonian monkeys in a prior study primarily by neuroprotection, with only 3%–5% of cells expressing a dopamine (DA) phenotype. In this paper, we sought to determine whether further manipulation of the neural microenvironment by overexpression of a developmentally critical molecule, glial cell-derived neurotrophic factor (GDNF), in the host striatum could enhance DA differentiation of hfNSCs injected into the substantia nigra and elicit growth of their axons to the GDNF-expressing target. hfNSCs were transplanted into the midbrain of 10 green monkeys exposed to 1-methyl-4-phenyl-1,2,3,6-tetrahydro-pyridine. GDNF was delivered concomitantly to the striatum via an adeno-associated virus serotype 5 vector, and the fate of grafted cells was assessed after 11 months. Donor cells remained predominantly within the midbrain at the injection site and sprouted numerous neurofilament-immunoreactive fibers that appeared to course rostrally toward the striatum in parallel with tyrosine hydroxylase-immunoreactive fibers from the host substantia nigra but did not mature into DA neurons. This work suggests that hfNSCs can generate neurons that project long fibers in the adult primate brain. However, in the absence of region-specific signals and despite GDNF overexpression, hfNSCs did not differentiate into mature DA neurons in large numbers. It is encouraging, however, that the adult primate brain appeared to retain axonal guidance cues. We believe that transplantation of stem cells, specifically instructed ex vivo to yield DA neurons, could lead to reconstruction of some portion of the nigrostriatal pathway and prove beneficial for the parkinsonian condition. |
Databáze: | OpenAIRE |
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