Nestin Expression in Embryonic and Adult Human Teeth under Normal and Pathological Conditions

Nestin is an intermediate filament most related to neurofilaments and expressed predominantly in the developing nervous system and muscles. In the present study we examined the in vivodistribution of nestin in human teeth during embryonic development and in permanent teeth under normal and pathologi...

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Veröffentlicht in:The American journal of pathology 2000-07, Vol.157 (1), p.287-295
Hauptverfasser: About, Imad, Laurent-Maquin, Dominique, Lendahl, Urban, Mitsiadis, Thimios A.
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container_issue 1
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container_title The American journal of pathology
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creator About, Imad
Laurent-Maquin, Dominique
Lendahl, Urban
Mitsiadis, Thimios A.
description Nestin is an intermediate filament most related to neurofilaments and expressed predominantly in the developing nervous system and muscles. In the present study we examined the in vivodistribution of nestin in human teeth during embryonic development and in permanent teeth under normal and pathological conditions. The results show that nestin is first expressed at the bell stage and that its distribution is restricted in pulpal cells located at the cusp area of the fetal teeth. In young permanent teeth, nestin is found only in functional odontoblasts, which produce the hard tissue matrix of dentin. Expression is progressively down-regulated and nestin is absent from older permanent teeth. In carious and injured teeth, nestin expression is up-regulated in a selective manner in odontoblasts surrounding the injury site, showing a link between tissue repair competence and nestin up-regulation under pathological conditions. In an in vitro assay system of human dental pulp explants, nestin is up-regulated after local application of bone morphogenic protein-4. A similar effect is seen in cultures of primary pulp cells during their differentiation into odontoblasts. Taken together, these results suggest that nestin plays a potential role in odontoblast differentiation during normal and pathological conditions and that bone morphogenic protein-4 is involved in nestin up-regulation.
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In the present study we examined the in vivodistribution of nestin in human teeth during embryonic development and in permanent teeth under normal and pathological conditions. The results show that nestin is first expressed at the bell stage and that its distribution is restricted in pulpal cells located at the cusp area of the fetal teeth. In young permanent teeth, nestin is found only in functional odontoblasts, which produce the hard tissue matrix of dentin. Expression is progressively down-regulated and nestin is absent from older permanent teeth. In carious and injured teeth, nestin expression is up-regulated in a selective manner in odontoblasts surrounding the injury site, showing a link between tissue repair competence and nestin up-regulation under pathological conditions. In an in vitro assay system of human dental pulp explants, nestin is up-regulated after local application of bone morphogenic protein-4. 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subjects Adolescent
Adult
Age Factors
Animals
Bioengineering
Biological and medical sciences
Bone Morphogenetic Protein 4
Bone Morphogenetic Proteins
Bone Morphogenetic Proteins - pharmacology
Cells, Cultured
Dental Caries
Dental Caries - metabolism
Dental Caries - pathology
Dental Pulp
Dental Pulp - chemistry
Dental Pulp - cytology
Dental Pulp - drug effects
Fetus
Fundamental and applied biological sciences. Psychology
Gestational Age
Humans
Immunohistochemistry
Intermediate Filament Proteins
Intermediate Filament Proteins - biosynthesis
Intermediate Filament Proteins - drug effects
Life Sciences
Mouth. Exocrine and endocrine salivary glands. Teeth. Esophagus
Nerve Tissue Proteins
Nestin
Regular
Research Support, Non-U.S. Gov
Tooth - chemistry
Tooth - embryology
Tooth - pathology
Tooth Germ - chemistry
Tooth Germ - embryology
Vertebrates: digestive system
title Nestin Expression in Embryonic and Adult Human Teeth under Normal and Pathological Conditions
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