Cited by 40Regulation of Appetite and ObesityNeuropeptides and Animal PhysiologyHypothalamic control of reproductive hormones

Identification of urocortin 3 afferent projection to the ventromedial nucleus of the hypothalamus in rat brain

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Chen, Peilin, Lin, David, Giesler, Jessica, Li, Chien·2011·Journal of Comparative Neurology

Abstract

Urocortin 3 (Ucn 3) is a corticotrophin-releasing factor related neuropeptide highly expressed in the brain. Ucn 3 nerve fibers heavily innervate the hypothalamic ventromedial nucleus (VMH), and Ucn 3 injection into the VMH suppresses feeding. Currently, the origin of the Ucn 3 afferent input into the VMH is unknown. In the present study, anatomical tracing shows that the major Ucn 3 afferent input to the VMH resides in the anterior parvicellular part of the paraventricular nucleus of the hypothalamus (PVHap) and the adjacent posterior part of the bed nucleus of stria terminalis (pBNST). VMH also receives moderate Ucn 3 input from the medial amygdala. Ucn 3 neurons located immediately caudal to the PVHap/pBNST in the rostral perifornical hypothalamic area (rPFH) provide only minimal input. The paucity of rPFH-VMH Ucn 3 projection is consistent with the finding that only Ucn 3 neurons in the rPFH co-expressed enkephalin (Enk), and Ucn 3/Enk double-labeled nerve fibers and terminals were observed predominately in the lateral septum (LS), whereas only a few double-labeled fibers were found in other brain areas including the VMH. Furthermore, retrograde tracing demonstrates that Ucn 3 neurons in the rPFH project to the LS. In conclusion, the present study determines that the major Ucn 3 afferent into the VMH originates from the PVHap/pBNST. Moreover, anatomical heterogeneity is observed in the hypothalamic Ucn 3 neuron population as the rostral part (PVHap/pBNST) of the population projects to the VMH and the caudal part (rPFH) co-localizes with Enk and provides major afferent input to the LS.

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Authors
Chen, P., Lin, D., Giesler, J., & Li, C.
Affiliations
University of Virginia Health System (US)
Corresponding author
Li, Chien
Venue
Journal of Comparative Neurology
Publisher
Wiley
Published
2011-05-23
Volume
519
Issue
10
Pages
2023-2042
ISSN
  • 0021-9967 (ISSN-L)
  • 1096-9861
OpenAlex
W2123070160
Cited by
39
References
54
Citations by year
2026: 4 · 2024: 2 · 2023: 1 · 2022: 3 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 2 · 2016: 2 · 2015: 6 · 2014: 1 · 2013: 4 · 2012: 6
FWCI
2.07
Type
journal article
Language
en
Open access
Locations
  • The Journal of Comparative Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (R01DK078049, P01DK026741)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
urocortin 3, ventromedial hypothalamus, afferent projections, paraventricular nucleus, bed nucleus of the stria terminalis, medial amygdala, enkephalin, lateral septum, feeding inhibition, retrograde tracing
MeSH terms
Afferent Pathways, Animals, Enkephalins, Humans, Immunohistochemistry, Male, Neurons, Ventromedial Hypothalamic Nucleus, Rats, Sprague-Dawley, Rats, Urocortins

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