Immunocytochemical detection of S-100β in the periodontal Ruffini endings in the rat incisor
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- 作者：Nakakura-Ohshima ; Kuniko ; Hayashi ; Sachiko ; Atsumi ; Yukako ; Wakisaka ; Satoshi ; Nozawa-Inoue ; Kayoko ; et. al.
- 关键词：S-100β ; Ruffini ending ; Axon terminal ; Schwann cell ; Periodontal ligament ; Incisor ; Immunohistochemistry ; Rat
- 刊名：Neuroscience Letters
- 出版年：1998
- 出版时间：December 24, 1998
- 年：1998
- 卷：258
- 期：3
- 页码：163-166
- 全文大小：619 K
文摘
Subcellular localization of S-100 protein, a kind of calcium binding proteins, was examined immunohistochemically in the Ruffini ending, a primary mechanoreceptor, in the periodontal ligament of the rat incisor. The periodontal ligament of the rat incisor was found to contain many S-100β- immunoreactive (-IR) structures but no S-100α-IR elements. The S-100β-IR structures ramified extensively to form Ruffini endings and were frequently associated with round cells, the terminal Schwann cells, which also showed S-100β-like immunoreactivity. In many periodontal Ruffini endings, S-100β-IR products were recognized in the cytoplasm of Schwann cells, but not in the axoplasm. However, some axon terminals which had fewer or shorter axonal fingers, were filled with S-100β-IR products. The present findings indicated the existence of S-100β, not S-100α, in axon terminals of the periodontal mechanoreceptive endings which were identified as type II Ruffini endings.