Abstract:
:Synapses in the lateral septum of the murine brain have been investigated by ultrastructural immunocytochemistry, using monoclonal anti-neurophysins in both immunoperoxidase and immunogold techniques. In the region shown by light microscopy to be rich in vasopressinergic innervation, synaptic boutons containing approximately 30 nm clear vesicles and occasional approximately 100 nm dense-cored granules (granules) were stained by pre-embedding immunoperoxidase procedures with antisera to vasopressin-neurophysin, but not oxytocin-neurophysin; reaction product was diffusely distributed in the terminals. Terminals were symmetrical, and both axosomatic and axodendritic in type. Postembedding immunogold procedures by use of anti-vasopressin-neurophysin labeled only the approximately 100 nm diameter granules in the terminals. Sodium meta-periodate treatment 'bleached' immunoreactive granules, indicating the presence of a carbohydrate residue. The quantum of peptide packaged in the granules appears to be smaller than that in magnocellular neurones; nevertheless, the results indicate that, as in the magnocellular neurosecretory system, vasopressin and its neurophysin are packaged exclusively in granules, and that vasopressin in the septum is likely to be derived from a precursor comprising vasopressin, vasopressin-neurophysin and a glycosylated residue.
journal_name
Cell Tissue Resjournal_title
Cell and tissue researchauthors
Shaw FD,Castel M,Morris JFdoi
10.1007/BF00215524subject
Has Abstractpub_date
1987-08-01 00:00:00pages
403-10issue
2eissn
0302-766Xissn
1432-0878journal_volume
249pub_type
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