Ultrastructural evidence for sinusoid spaces and coupling between pituicytes in the rat.

Cell and tissue research ·Vol. 161 ·No. 1 ·1975-08-01 ·Pages 33-45

Dreifuss JJ, Sandri C, Akert K, Moor H

Abstract

The pericapillary palisade of the rat neurohypophysis was examined by means of thin-section and freeze-etch electron-microscopy. Special attention was given to pituicyte processes intermingled with neurosecretory terminals. These processes are identified by the presence of lipid droplets and ribosomes. Extracellular spaces are conspicuously enlarged in circumscribed regions between fingerlike protrusions of pituicyte processes. Neurosecretory axons seem to have free access to these enlarged spaces. Zonulae occludentes often combined with small gap junctions are found at the border of these sinusoid spaces. Gap junctions and occasionally intermediate junctions are seen between pituicyte processes. The topographic relationship and the functional significance of these structural features remain to be further elucidated.

MeSH Terms

Animals Axons/ultrastructure Capillaries/ultrastructure Cytoplasmic Granules/ultrastructure Extracellular Space Freeze Etching Intercellular Junctions/ultrastructure Nerve Endings/ultrastructure Neurosecretion Pituitary Gland, Posterior/metabolism,ultrastructure Rats

Authors & Affiliations

4 authors, click to expand affiliations / ORCID

Dreifuss J J

Sandri C

Akert K

Moor H

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28 references, click to expand

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Article Info

Journal

Cell and tissue research

Abbr.

Cell Tissue Res

ISSN

0302-766X

DOI

10.1007/BF00222112

Published

1975-08-01

Pages

33-45

Language

English

Region

Germany

NLM ID

0417625

Subset

External Links

PubMed source DOI: 10.1007/BF00222112 View journal details

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Ultrastructural evidence for sinusoid spaces and coupling between pituicytes in the rat.

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