Cited by 97Neuroendocrine regulation and behaviorEstrogen and related hormone effectsHypothalamic control of reproductive hormones

Estrogen receptor‐β, but not estrogen receptor‐α, is expressed in prolactin neurons of the female rat paraventricular and supraoptic nuclei: Comparison with other neuropeptides

Suzuki, Shotaro, Handa, Robert J.·2005·Journal of Comparative Neurology

Abstract

Estrogen receptor‐α (ER‐α) and ER‐β exhibit fine differences in their distributions in the rodent forebrain, and one such difference is observed in the paraventricular (PVN) and supraoptic (SON) nuclei. To investigate the functional significance of ER in these brain areas, we examined the neuropeptide characteristics of ER‐expressing neurons in the PVN and SON of female rats by using dual‐label immunocytochemistry. The distributions of ER‐α immunoreactivity (ir) and ER‐β ir were nonoverlapping in the PVN and SON. Nuclear ER‐α ir was found in a population of thyrotropin‐releasing hormone (TRH)‐expressing neurons in the PVN (5.93% ± 1.20% SEM), but not in any other identified cell phenotype of the PVN and SON. The phenotype of neurons with the highest percentage expressing ER‐β was found to be prolactin (PRL) immunoreactive in both the parvocellular (84.95% ± 4.11%) and the magnocellular (84.76% ± 3.40%) parts of the PVN as well as the SON (87.57% ± 4.64%). Similarly, most vasopressin‐immunoreactive neurons were also ER‐β positive in the PVN (66.14% ± 2.47%) and SON (72.42% ± 4.51%). In contrast, although a high percentage of oxytocin (OXY) neurons coexpressed ER‐β in the PVN (84.39% ± 2.99%), there was very little ER‐β/OXY colocalization in the SON. Low levels of corticotropin‐releasing hormone neurons also expressed ER‐β ir in the PVN (12.57% ± 1.99%), but there was no ER‐β colocalization with TRH. In summary, these findings further support the possibility of direct effects of estrogen on neuropeptide expression and implicate estrogen involvement in the regulation of various aspects of neuroendocrine function. J. Comp. Neurol. 484:28–42, 2005. © 2005 Wiley‐Liss, Inc.

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Authors
Suzuki, S., & Handa, R. J.
Affiliations
  • Loyola University Chicago (US)
  • Colorado State University (US)
Corresponding author
Handa, Robert J.
Venue
Journal of Comparative Neurology
Publisher
Wiley
Published
2005-02-16
Volume
484
Issue
1
Pages
28-42
ISSN
  • 0021-9967 (ISSN-L)
  • 1096-9861
OpenAlex
W2054303348
Cited by
97
References
96
Citations by year
2026: 1 · 2025: 4 · 2024: 4 · 2023: 2 · 2022: 5 · 2021: 5 · 2020: 4 · 2019: 3 · 2018: 5 · 2017: 4 · 2016: 3 · 2015: 4 · 2014: 7 · 2013: 6 · 2012: 3
FWCI
9.38
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Comparative Neurology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute on Alcohol Abuse and Alcoholism (R01AA012693, AA12693)
  • National Institute of Neurological Disorders and Stroke (R01NS039951, NS39951)
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
estrogen receptor beta, estrogen receptor alpha, paraventricular nucleus, supraoptic nucleus, thyrotropin-releasing hormone, vasopressin, oxytocin, corticotropin-releasing factor
MeSH terms
Animals, Arginine Vasopressin, Corticotropin-Releasing Hormone, Female, Immunohistochemistry, Neurons, Neuropeptides, Oxytocin, Paraventricular Hypothalamic Nucleus, Prolactin, RNA, Supraoptic Nucleus, Thyrotropin-Releasing Hormone, Rats, Sprague-Dawley, Reverse Transcriptase Polymerase Chain Reaction, Estrogen Receptor alpha, Estrogen Receptor beta, Rats

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