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KMID : 0381919960260020243
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Korean Journal of Microscopy
1996 Volume.26 No. 2 p.243 ~ p.252
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Histochemical and Electron Microscopic Study on the Zinc-containing Neurons in Rat Spinal Cord
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Cho Hyun-Wook
Han Weon-Dong
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Abstract
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The somata and boutons of the zinc-containing neurons in the spinal cord of the rats were labeled by intraperitoneal injection of sodium selenite and silver amplification. The labeled somata of the neurons were located in laminae V, VI, VII and X of the gray matter. The zinc selenium reaction products were retrogradely transported and precipitated into somata of the neuron with survival 8 hours. This observation suggest that all or part of the spinal cord zinc-containing neurons are interneurons. At survival 1 hour, the loaded axonal boutons with zinc precipitates of zinc-containing neurons were distributed in the gray matter and in the processes of lateral and ventral funiculi of the white matter. In particular, AMG stained boutons with huge form were appeared in the lamina IX. Ultrastructurally, the zinc precipitates were located in the cytoplasmic lysosomes or the vesicle within boutons of the zinc-containing neuron in accordance with survival times.
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KEYWORD
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Zinc-containing neuron, Autometallography, Spinal cord
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