4.4 Article Proceedings Paper

Immunohistochemical evidence for proteolipid protein and nestin expression in the late bell stage of developing rodent teeth

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ARCHIVES OF ORAL BIOLOGY
卷 50, 期 2, 页码 171-174

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PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.archoralbio.2004.11.007

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immunohistochemistry; PLP; nestin; tooth formation

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In this study, the expression of proteolipid protein (PLP) and nestin is studied in the late bell stage of developing rodent teeth in neonatal rats. By using immunohistochemistry, it was shown that odontoblasts, ameloblasts and the stratum intermedium are positive for PLP in regions of active matrix deposition. Reactivity for nestin could be detected in the odontoblasts, stratum intermedium and in some of the apical, processes of the ameloblasts. The fact that mutations in the PLP gene can cause disturbances in tooth form, number and eruption taken together with the presence of PLP reactivity in odontoblasts and ameloblasts of healthy animals, suggests a crucial role for PLP in developing teeth because of its structural supportive characteristics. These results also imply the possible use of PLP antibody as a new marker for, respectively, dentin and enamel-secreting odontoblasts and ameloblasts. PLP and nestin expression could point to a possible similarity in function between the oligodendrocyte and the odontoblast, both derived from the neural crest. To compare with the situation in human tissue, PLP and nestin expression were preliminarily tested on human dental pulp. The odontoblasts were positive for both PLP and nestin. (c) 2004 Elsevier Ltd. All rights reserved.

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