Small fragments of superficial neuropil and fragments of deeper layers from various regions of the brains of Xenopus laevis Daud. and Rana esculenta L. were fixed in buffered osmium tetroxide, embedded in Vestopal W or methacrylate, and studied with the electron microscope. The glial fibers and their meningeal end-feet contain numerous large mitochondrion-like dense bodies for which the term "gliosome" has been adopted. Gliosomes have a specific and constant structure characterized by the presence of a row of peripheral and circular canaliculi and an electron-opaque fibrous or finely granular matrix. Also, another less frequently found type of gliosome is present which contains regular lamellar structures. The gliosomes vary considerably in size and may be very large, up to 9 µ in length. Numerous and various intermediate forms between mitochondria and gliosomes can be seen. Gliosomes are largest and most numerous in the distal portions of the glial fibers and in the meningeal end-feet.
Article| August 01 1965
THE ULTRASTRUCTURE OF GLIOSOMES IN THE BRAINS OF AMPHIBIA
From the Institute of Comparative Anatomy "G. B. Grassi," University of Rome, and the Center of Neuroembryology, Consiglio Nazionale delle Ricerche, Rome, Italy.
Dr. Srebro's present address is Department of Biology and Embryology, Medical Academy, Cracow, Poland
Received: August 05 1964
Online Issn: 1540-8140
Print Issn: 0021-9525
Copyright © 1965 by The Rockefeller University Press
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Zbigniew Srebro; THE ULTRASTRUCTURE OF GLIOSOMES IN THE BRAINS OF AMPHIBIA . J Cell Biol 1 August 1965; 26 (2): 313–322. doi: https://doi.org/10.1083/jcb.26.2.313
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