Retrograde labeling of regenerated electromotor neurons with HRP in a teleost fish,Sternarchus albifrons: Relation to cell death |
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Authors: | Marilyn J. Anderson H. Loren Fong Stephen G. Waxman |
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Affiliation: | (1) Department of Neurology, Stanford University School of Medicine; Veterans Administration Medical Center, Palo Alto, California, USA;(2) Neurology Unit (127), Veterans Administration Medical Center, 3801 Miranda Avenue, 94304 Palo Alto, CA, USA |
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Abstract: | Summary Back-labeling of regenerated electromotor neurons in the teleost Sternarchus albifrons was performed to test the hypothesis that, in regenerated spinal cord, incorrectly located electromotor neurons are eliminated because their axons do not reach the correct target area (electric organ). In each cross section examined, all of the regenerated electromotor neurons ipsilateral to the implantation site were labeled with horseradish peroxidase, including those ectopic cells located at the edge of the cord, which are later eliminated by selective cell death. Retrograde labeling of these ectopic neurons demonstrates that their axons do extend into the correct target area (the regenerated electric organ). Thus total misdirection of the axons cannot be the cause of their subsequent cell death. We conclude that selective neuronal death in this system does not reflect the absence of axonal projection to the correct target area.A preliminary report on this work has been presented in Soc. Neurosci. Abstracts 10:48 (1984) |
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Keywords: | Cell death Spinal cord Neurons Regeneration Horseradish peroxidase Teleost |
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