Ultrastructure of mouse incisor ameloblasts after vascular perfusion with colchicine

Hirotoshi Akita, M. Kagayama

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

In order to revalue the effects of colchicine on incisor secretory ameloblasts, entire mice were perfused with Krebs solution supplemented with a buffer and amino acids, through the right common carotid artery. The normal ultrastructure of the cells was maintained for 2 h with the perfusate alone. When colchicine (0.3-3.0 μg/ml) was added to the perfusate, it induced ultrastructural changes, such as the loss of cytoplasmic microtubules, the loss of secretory granules in Tomes' process, the abnormal accumulation and secretion of secretory granules, disarranged Golgi apparatus and the fragmentation of rough endoplasmic reticulum. Vesicles (150-400 nm in diameter) resembling immature secretory granules also accumulated, the degree of accumulation depending on the duration of colchicine treatment. The accumulation of secretory granules and these vesicles suggests that the intracellular transport system was affected by colchicine but that the production of secretory granules was continuous throughout the experimental period. The present perfusion system has enabled us to treat ameloblasts with an agent that is a useful experimental tool for elucidating cell functions, despite being lethal to animals in vivo.

Original languageEnglish
Pages (from-to)567-574
Number of pages8
JournalCell and Tissue Research
Volume239
Issue number3
DOIs
Publication statusPublished - 1985 Mar 1

Keywords

  • Ameloblasts
  • Colchicine
  • Light- and electron microscopy
  • Mouse
  • Teeth
  • Vascular perfusion

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology
  • Cell Biology

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