Budding of small vesicles from the rough‐surfaced endoplasmic reticulum in secretory ameloblasts of rat molar tooth germs

Saburou Matsuo, Yoshiro Takano, Satoshi Wakisaka, Hiroyuki Ichikawa, Shinji Nishikawa, Michio Akai

Research output: Contribution to journalArticlepeer-review

Abstract

The budding of small vesicles from the rough‐surfaced endoplasmic reticulum (rER) was examined in the secretory ameloblast of rat molar tooth germs by ordinary fixation or prolonged osmium fixation. The budding of small vesicles from the rER was observed not only at the special region (transitional region) of the rER system, which abutted on the cis‐face of the Golgi apparatus, but also at other regions of the rER in the secretory ameloblast. Small vesicles (presumed to be transitional vesicles) were adjacent to the rER, which also showed budding of vesicles. After prolonged osmium treatment, osmium deposits appeared in small vesicles, as well as in the cisternae of the cis saccule of the Golgi apparatus. Small vesicles containing osmium deposits were located at various regions of the cell, including the cis‐face of the Golgi apparatus. These findings indicate that the budding of small vesicles from the rER is not restricted to the transitional region of the rER system of the secretory ameloblast, but is found at various regions of the cell. This indicates that newly synthesized proteins may be transferred from the rER cisternae to the transitional vesicles not only in the transitional region of the rER system adjacent to the Golgi apparatus, but also in other regions of the secretory ameloblast.

Original languageEnglish
Pages (from-to)317-322
Number of pages6
JournalThe Anatomical Record
Volume222
Issue number4
DOIs
Publication statusPublished - 1988 Dec
Externally publishedYes

ASJC Scopus subject areas

  • Anatomy
  • Agricultural and Biological Sciences (miscellaneous)

Fingerprint Dive into the research topics of 'Budding of small vesicles from the rough‐surfaced endoplasmic reticulum in secretory ameloblasts of rat molar tooth germs'. Together they form a unique fingerprint.

Cite this