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- W2079200499 abstract "✓ Spinal cord tissue was obtained from 13- and 14-day embryonic rats and homologously grafted to the completely transected spinal cord of adult rats. Eight and 12 weeks after grafting, clinical, electrophysiological, histological, and neuroanatomical studies were performed. Motor performance of the hosts was assessed by the inclined-plane test. The conduction of nerve impulses across the lesion-transplantation site was evaluated by recording the spinal corticomotor and somatosensory evoked potentials. The survival, growth, differentiation, and parenchymal integration of the graft were documented histologically on semi-thin sections. The axonal interactions between the host spinal cord and the graft as well as the posttraumatic retrograde degeneration of corticospinal axons were investigated using the horseradish peroxidase (HRP) technique. Clinical and electrophysiological assessments did not demonstrate any functional activity of the graft. On histological examination, grafted neurons showed a survival rate of 55%. Such neurons exhibited a limited degree of growth and differentiation. The extent of parenchymal integration between the host spinal cord and the graft varied considerably among different specimens and in the various regions of every specimen. The HRP investigations demonstrated that some axonal interactions between the host spinal cord and the graft had occurred. Regenerated axons arising from both the spinal cord and the dorsal root ganglia of the host entered the graft and elongated in it. Also, axons from the grafted neurons were able to grow for some distance in the host spinal cord. The phenomenon of the posttraumatic retrograde degeneration of corticospinal axons was not affected by this embryonic tissue grafting." @default.
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- W2079200499 date "1989-03-01" @default.
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- W2079200499 title "Studies on embryonic transplants to the transected spinal cord of adult rats" @default.
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- W2079200499 doi "https://doi.org/10.3171/jns.1989.70.3.0454" @default.
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