Fine structural characteristics of neurophysin-positive perivascular plexus that develop in the rat hypothalamus following interruption of the hypothalamo-neurohypophysial tract

Transection of neurosecretory axons of the hypothalamo-neurohypophysial tract within the hypothalamus by stereotactic grafts of various tissues or knife cuts induced the development of neurophysin-positive plexus around arterioles, venules and capillaries in the vicinity of these grafts or cuts. The...

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Bibliographic Details
Published in:Cell and tissue research 1987, Vol.247 (1), p.137-143
Main Authors: DELLMANN, H.-D, LIH-FEN LUE, BELLIN, S. I
Format: Article
Language:English
Subjects:
Animals
Applied sciences
Arterioles - ultrastructure
Axons - ultrastructure
Biological and medical sciences
Capillaries - ultrastructure
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
Hypothalamo-Hypophyseal System - physiology
Hypothalamus - blood supply
Hypothalamus - ultrastructure
Hypothalamus. Hypophysis. Epiphysis. Urophysis
Male
Microscopy, Electron
Morphology. Functional localizations
Nerve Regeneration
Neurons - ultrastructure
Neurophysins - analysis
Other techniques and industries
Rats
Venules - ultrastructure
Vertebrates: endocrinology
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Summary:Transection of neurosecretory axons of the hypothalamo-neurohypophysial tract within the hypothalamus by stereotactic grafts of various tissues or knife cuts induced the development of neurophysin-positive plexus around arterioles, venules and capillaries in the vicinity of these grafts or cuts. These plexus ranged from single axons to densely woven networks and tended to increase progressively with time after experimental intervention. At the fine structural level, typical neurosecretory axon profiles were either abutting the perivascular connective tissue space or located within it. They were usually accompanied by astrocyte processes or microglial cells. Many of these axons had extensive contact with the surrounding basal lamina at which point clusters of microvesicles reminiscent of axon terminals in the neural lobe were present.
ISSN:0302-766X
1432-0878
DOI:10.1007/BF00216556