Cited by 292Stress Responses and CortisolNeurotransmitter Receptor Influence on BehaviorNeuropeptides and Animal Physiology

Serotonin activates the hypothalamic–Pituitary–Adrenal axis via serotonin 2C receptor stimulation

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Heisler, L. K., Pronchuk, N., Nonogaki, K., Zhou, L., Raber, J., Tung, L., Yeo, G. S. H., O'Rahilly, S. +3 more·2007·Journal of Neuroscience

Abstract

The dynamic interplay between serotonin [5-hydroxytryptamine (5-HT)] neurotransmission and the hypothalamic-pituitary-adrenal (HPA) axis has been extensively studied over the past 30 years, but the underlying mechanism of this interaction has not been defined. A possibility receiving little attention is that 5-HT regulates upstream corticotropin-releasing hormone (CRH) signaling systems via activation of serotonin 2C receptors (5-HT(2C)Rs) in the paraventricular nucleus of the hypothalamus (PVH). Through complementary approaches in wild-type rodents and 5-HT(2C)R-deficient mice, we determined that 5-HT(2C)Rs are necessary for 5-HT-induced HPA axis activation. We used laser-capture PVH microdissection followed by microarray analysis to compare the expression of 13 5-HTRs. Only 5-HT(2C)R and 5-HT(1D)R transcripts were consistently identified as present in the PVH, and of these, the 5-HT(2C)R was expressed at a substantially higher level. The abundant expression of 5-HT(2C)Rs in the PVH was confirmed with in situ hybridization histochemistry. Dual-neurohistochemical labeling revealed that approximately one-half of PVH CRH-containing neurons coexpressed 5-HT(2C)R mRNA. We observed that PVH CRH neurons consistently depolarized in the presence of a high-affinity 5-HT(2C)R agonist, an effect blocked by a 5-HT(2C)R antagonist. Supporting the importance of 5-HT(2C)Rs in CRH neuronal activity, genetic inactivation of 5-HT(2C)Rs produced a downregulation of CRH mRNA and blunted CRH and corticosterone release after 5-HT compound administration. These findings thus provide a mechanistic explanation for the longstanding observation of HPA axis stimulation in response to 5-HT and thereby give insight into the neural circuitry mediating the complex neuroendocrine responses to stress.

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Crossref · 10.1523/jneurosci.2584-06.2007

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  1. Hoyer D (1989) 5-Hydroxytryptamine receptors and effector coupling mechanisms in peripheral tissues. In: Peripheral actions of 5-HT (Fozard J, ed), pp 72-99. Oxford: Oxford UP.

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Authors
Heisler, L. K., Pronchuk, N., Nonogaki, K., Zhou, L., Raber, J., Tung, L., Yeo, G. S. H., O'Rahilly, S., Colmers, W. F., Elmquist, J. K., & Tecott, L. H.
Affiliations
  • University of Cambridge (GB)
  • University of Alberta (CA)
  • University of California, San Francisco (US)
  • Oregon National Primate Research Center (US)
  • The University of Texas Southwestern Medical Center (US)
Corresponding author
Elmquist, J. K.
Venue
Journal of Neuroscience
Published
2007-06-27
Volume
27
Issue
26
Pages
6956-6964
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2080867987
Cited by
292
References
63
Citations by year
2026: 6 · 2025: 13 · 2024: 12 · 2023: 8 · 2022: 12 · 2021: 13 · 2020: 18 · 2019: 12 · 2018: 21 · 2017: 10 · 2016: 18 · 2015: 11 · 2014: 20 · 2013: 26 · 2012: 15
FWCI
6.37
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Ellison Medical Foundation (AG-NS-0201)
  • Giannini Foundation of Agricultural Economics
  • National Alliance for Research on Schizophrenia and Depression
  • Wellcome Trust
  • National Institutes of Health (AG-NS-0201)
  • Canadian Institutes of Health Research (MT10520)
  • Medical Research Council
  • National Institute on Aging (R01 AG 20904, R01AG020904)
  • National Institute of Mental Health (R01 MH61624, R01MH061583, R01MH061624)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P01DK056116, R01DK065171, R01DK65171)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
Keywords
serotonin, 5-HT2C receptor, hypothalamic-pituitary-adrenal axis, corticotropin-releasing factor, paraventricular nucleus, CRH neurons, 5-HT1D receptor, corticosterone release
MeSH terms
Adrenal Cortex Hormones, Animals, Corticotropin-Releasing Hormone, Hypothalamo-Hypophyseal System, Male, Mice, Inbred C57BL, Neurosecretory Systems, Paraventricular Hypothalamic Nucleus, Pituitary-Adrenal System, RNA, Messenger, Serotonin, Stress, Physiological, Down-Regulation, Rats, Sprague-Dawley, Mice, Knockout, Receptor, Serotonin, 5-HT1D, Receptor, Serotonin, 5-HT2C, Mice, Rats, Serotonin 5-HT2 Receptor Agonists

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