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Axoglial contacts in the area postrema of the cat - An ultrastructural studyAxoglial contacts were observed in an ultrastructural study of the area postrema of the cat. According to the disposition of the electron-dense projections attached to the adjoining membranes these contacts were classified as symmetrical or asymmetrical. The axon profiles contained aggregations of clear vesicles randomly distributed or grouped in clusters adjacent to the electron-dense projections. Dense core vesicles were occasionally seen. The neuroglial profiles were either astrocytic or ependymoglial in nature. The astrocytes showed a clear cytoplasm, polymorphous vesicles, mitochondria, glycogen granules, and bundles of filaments. The ependymal cells, in contrast, had a more electron-dense and granular appearance, tubular structures, irregular vesicular formations, profiles of smooth reticuloendoplasm, and filaments grouped in bundles or isolated in the cytoplasm. The possibility that these contacts might play a role in the chemical transfer from neurons to glial cells is discussed on the basis of existing biochemical data.
Document ID
19870039975
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Damelio, Fernando E. (NASA Ames Research Center Moffett Field, CA, United States)
Gibbs, Michael A. (NASA Ames Research Center Moffett Field, CA, United States)
Mehler, William R. (NASA Ames Research Center Moffett Field, CA, United States)
Philpott, Delbert E. (NASA Ames Research Center Moffett Field, CA, United States)
Savage, Wayne (San Jose State University CA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Publication Information
Publication: Anatomical Record
Volume: 215
ISSN: 0003-276X
Subject Category
LIFE SCIENCES (GENERAL)
Funding Number(s)
CONTRACT_GRANT: NCC2-282
CONTRACT_GRANT: NCA2-OR-675-303
Distribution Limits
Public
Copyright
Other