Abstract：
:The projections of serotonin-containing neurons of the midbrain raphe nuclei (nucleus raphe dorsalis, nucleus centralis superior) are studied by analysis of axonal transport of labeled amino acids. These results are correlated with regional alterations of serotonin content following midbrain raphe lesions which produce significant serotonin depletion in nearly all regions of the central nervous system. Twenty-four hours following injection of 100 muCi [3H]proline, raphe neurons have taken up labeled material and transported it, presumably as protein, to telencephalon, diencephalon, brain stem, the cerebellum and the spinal cord. This transport appears to take place predominantly in serotonin neurons. After injection of 100 muCi [3H]5-HTP into nucleus raphe dorsalis or nucleus centralis superior, the pattern of regional distribution of transported material is very similar to that obtained with tritiated proline. Selective lesions of serotonin terminals with 5.6-DHT result in greatly diminished axonal transport of proteins to all telencephalic, diencephalic and mesencephalic areas as well as to cerebellum, pons-medulla and spinal cord. Unilateral destruction of the medial forebrain bundle results in significant reduction in axonal transport of labeled material to ipsilateral telencehalon and thalamus. These results provide further support for the view that serotonin neurons of the midbrain raphe nuclei project widely throughout the neuraxis to telencephalon, diencephalon, brain stem, cerebellum and spinal cord.
journal_name
Brain Resjournal_title
Brain researchauthors
Halaris AE,Jones BE,Moore RYdoi
10.1016/0006-8993(76)90144-xsubject
Has Abstractpub_date
1976-05-14 00:00:00pages
555-74issue
3eissn
0006-8993issn
1872-6240pii
0006-8993(76)90144-Xjournal_volume
107pub_type
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