The confronting cisternae in neurons in the substantia gelatinosa of the spinal cord of rats and Japanese monkeys |
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Authors: | Kenichirou Inomata Teruhiko Okada Harumichi Seguchi Kazuo Ogawa |
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Affiliation: | 1. Department of Anatomy, Shimane Medical University, Izumo, Japan 3. Department of Anatomy, Kochi Medical School, Nankoku, Japan 4. Department of Anatomy, Faculty of Medicine, Kyoto University, Kyoto, Japan
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Abstract: | The neurons in the substantia gelatinosa of the spinal cord of the rat and Japanese monkey were investigated electron microscopically and ultracytochemically. The confronting cisternae observed in the cytoplasm of the majority of gelatinosal neurons in both species were composed of closely apposed parallel cisternae with electron-dense flocculent material, and a continuity with the cisternae of the rough endoplasmic reticulum was often observed. Ultracytochemically, the p-nitrophenylphosphatase (p-NPPase) activity was present in the confronting cisternae, but thiamine monophosphatase (TMPase) and thiamine pyrophosphatase (TPPase) activities were absent. These results indicate that the confronting cisternae are a variant of the rough endoplasmic reticulum. |
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