The effect of colchicine on protein secretion by differentiating odontoblasts and ameloblasts in the hamster tooth in vitro as shown by radioautography with 3H-proline
| Autor: | Antonius L.J.J. Bronckers, J.H.M. Wöltgens, D.M. Lyaruu, Theodoras J. M. Bervoets |
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| Rok vydání: | 1988 |
| Předmět: |
Pathology
medicine.medical_specialty Histology Proline Mesenchyme Odontoblast differentiation Biology Tritium Pathology and Forensic Medicine chemistry.chemical_compound stomatognathic system Cricetinae Ameloblasts medicine Animals Colchicine Basement membrane Mesocricetus Odontoblasts Proteins Tooth Germ Cell Biology Molar Epithelium Cell biology Kinetics stomatognathic diseases medicine.anatomical_structure Odontoblast Animals Newborn chemistry Protein Biosynthesis Ameloblast differentiation Autoradiography Ameloblast |
| Zdroj: | Cell and Tissue Research. 252:631-638 |
| ISSN: | 1432-0878 0302-766X |
| DOI: | 10.1007/bf00216651 |
| Popis: | We have examined radioautographically the protein synthetic and secretory activity of differentiating odontoblasts and ameloblasts, exposed for 9 h in vitro to various concentrations of colchicine in the presence of 3H-proline. Colchicine impairs the cytodifferentiation of the dental epithelium into ameloblasts and of the dental mesenchyme into odontoblasts; the effects depend on the dose. However, dental epithelial cells are more sensitive to the drug than dental mesenchymal cells. In stages prior to odontoblast differentiation, colchicine enhances the number of radioautographic grains over the dental epithelium without changing the grain counts over the dental basement membrane area. This suggests that in vitro the dental epithelium synthesizes and secretes proline-containing components that are not constituents of the dental basement membrane. Also, during the subsequent stages of ameloblast differentiation colchicine increases the number of radioautographic grains over the preameloblasts. The present data suggest that the primary in vitro target of colchicine is not the dental mesenchyme, but the dental epithelium. The data also indicate that differentiating ameloblasts synthesize and secrete significant amounts of proteins in vitro prior to the first deposition of enamel. |
| Databáze: | OpenAIRE |
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