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| Content Provider | PubMed Central |
|---|---|
| Author | Abe, H. Renda, T. Kimura, H. Tooyama, I. Erspamer, V. |
| Abstract | Using a specific antiserum recently raised against [D-Ala2]deltorphin I (DADTI: Tyr-D-Ala-Phe-Asp-Val-Val-Gly-NH2), a highly selective ligand for delta-opioid receptors, we have previously demonstrated the occurrence of positive immunostaining in several structures of mouse brain. We describe here the neuroanatomical distribution patterns of DADTI-immunoreactive neuronal bodies, axons, and tanycytes in rat brain. Positive neuronal somata were localized mainly in the ventral mesencephalon, including the ventral tegmental area and the pars compacta of the substantia nigra. A minor population of positive somata was found in the pars reticulata and pars lateralis of the substantia nigra, raphe nuclei, supramammillary nucleus, and retrorubral reticular nucleus. All these regions, except for the supramammillary nucleus, contain dopamine cell bodies. Intensely stained positive nerve fibers could be traced along the medial forebrain bundle. Dense positive terminals were seen in the neostriatum, nucleus accumbens shell, olfactory tubercle, septal areas, cingulate, and medial prefrontal cortex. Double-immunostaining study revealed that, in the substantia nigra, almost all (97.8%) DADTI-positive neurons colocalized with tyrosine hydroxylase (TH), and the doubly stained cells occupied about one-third (29.1%) of the total population of TH-positive neurons. Only a few DADTI/TH-positive cells also stained for 28-kDa calbindin D, although many neurons double-stained for 28-kDa calbindin D and TH. In contrast, the supramammillary nucleus contained a number of DADTI-positive cells, which nearly always stained positively for 28-kDa calbindin D but did not stain for TH. The association of DADTI-like immunoreactivity with certain dopaminergic pathways seems of particular interest. A small population of DADTI-immunostained tanycytes was present in the ventral part of the third ventricle wall. |
| Starting Page | 9635 |
| File Format | |
| ISSN | 10916490 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 20 |
| Volume Number | 90 |
| Language | English |
| Publisher Date | 1993-10-15 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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