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  • Title: [Transplantation of neural stem cells for spinal cord injury].
    Author: Nakamura M, Toyama Y, Okano H.
    Journal: Rinsho Shinkeigaku; 2005 Nov; 45(11):874-6. PubMed ID: 16447750.
    Abstract:
    Neural progenitor cells, including neural stem cells (NSCs), are an important potential graft material for cell therapeutics of damaged spinal cord. Here we used as a source of graft material a NSC-enriched population derived from human fetal spinal cord (Embryonic week 8-9) and expanded in vitro by neurosphere formation. NSCs labeled with BrdU (TP) or culture medium (CON) were transplanted into the adult marmoset spinal cord after contusion injury at C5 level. Grafted NSCs survived and migrated up to 7 mm far from the lesion epicenter. Double-staining with TuJ1 for neuron, GFAP for astrocyte, or CNPase for oligodendrocyte and BrdU revealed that grafted NSCs differentiated into neurons and oligodendrocytes 8 weeks after transplantation. More neurofilaments were observed in TP than those of CON. Furthermore, behavioral assessment of forelimb muscle strength using bar grip test and amount of spontaneous motor activity using infrared-rays monitoring revealed that the grafted NSCs significantly increased both of them compared to those of CON. These results indicate that in vitro expanded NSCs derived from human fetal spinal cord are useful sources for the therapeutics of spinal cord injury in primates.
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