Cited by 1,150Neuropeptides and Animal PhysiologyNeuroendocrine regulation and behaviorRegulation of Appetite and Obesity

Immunohistochemical identification of neurons in the paraventricular nucleus of the hypothalamus that project to the medulla or to the spinal cord in the rat

Sawchenko, P. E., Swanson, L. W.·1982·Journal of Comparative Neurology

Abstract

A method that allows the concurrent localization of an antigen and a retrogradely transported fluorescent dye (true blue) was used to identify, immunohistochemically, cells in the paraventricular nucleus of the hypothalamus (PVH) that project to autonomic centers in the brainstem or in the spinal cord of the adult albino rat. After placing injections of true blue in the dorsal vagal complex or in upper thoracic segments of the spinal cord, series of evenly spaced sections through the PVH were stained with antisera directed against oxytocin, vasopressin, somatostatin, methionine‐enkephalin, or leucine‐encephalin. The results indicate that both oxytocin‐ and vasopressin‐stained cells in the PVH project to the spinal cord and (or) to the dorsal vagal complex, although about three times as many oxytocinstained cells were doubly labeled after injections centered in either terminal field. The oxytocin‐ and vasopressin‐stained cells that give rise to these long descending projections were found primarily in caudal parts of the parvo cellular division of the PVH, where immunoreactive cells were shown to be significantly smaller than oxytocin‐ and vasopressin‐stained cells in parts of the nucleus that project to the posterior pituitary. Small populations of cells in the PVH that cross‐react with antisera against somatostatin, leucine‐enkephalin, or methionine‐enkephalin were also shown to project directly to the region of the dorsal vagal complex and to the spinal cord, and to have a unique distribution within the PVH. Collectively, the total number of doubly labeled cells that were identified in these experiments accounts for only about one‐fourth of the total number of PVH neurons with long descending projections, thus suggesting that additional neuroactive substances are contained within these pathways.

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Crossref · 10.1002/cne.902050306

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Authors
Sawchenko, P. E., & Swanson, L. W.
Affiliations
Salk Institute for Biological Studies (US)
Venue
Journal of Comparative Neurology
Publisher
Wiley
Published
1982-03
Volume
205
Issue
3
Pages
260-272
ISSN
  • 0021-9967 (ISSN-L)
  • 1096-9861
OpenAlex
W2003590296
Cited by
1,150
References
5
Citations by year
2026: 12 · 2025: 7 · 2024: 15 · 2023: 11 · 2022: 15 · 2021: 27 · 2020: 31 · 2019: 19 · 2018: 17 · 2017: 21 · 2016: 26 · 2015: 28 · 2014: 20 · 2013: 33 · 2012: 36
FWCI
13.62
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Comparative Neurology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institutes of Health
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
paraventricular nucleus, descending projections, dorsal vagal complex, spinal cord, oxytocin, vasopressin, somatostatin, met-enkephalin, leu-enkephalin, retrograde tracing, autonomic regulation, rats
MeSH terms
Animals, Brain Mapping, Efferent Pathways, Enkephalins, Fluorescent Antibody Technique, Histocytochemistry, Hypothalamus, Male, Medulla Oblongata, Oxytocin, Paraventricular Hypothalamic Nucleus, Rats, Inbred Strains, Somatostatin, Spinal Cord, Vasopressins, Rats

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