Cited by 101Circadian rhythm and melatoninHypothalamic control of reproductive hormonesSleep and Wakefulness Research

Minireview: the neuroendocrinology of the suprachiasmatic nucleus as a conductor of body time in mammals

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Karatsoreos, Ilia N., Silver, Rae·2007·Endocrinology

Abstract

Circadian rhythms in physiology and behavior are regulated by a master clock resident in the suprachiasmatic nucleus (SCN) of the hypothalamus, and dysfunctions in the circadian system can lead to serious health effects. This paper reviews the organization of the SCN as the brain clock, how it regulates gonadal hormone secretion, and how androgens modulate aspects of circadian behavior known to be regulated by the SCN. We show that androgen receptors are restricted to a core SCN region that receives photic input as well as afferents from arousal systems in the brain. We suggest that androgens modulate circadian behavior directly via actions on the SCN and that both androgens and estrogens modulate circadian rhythms through an indirect route, by affecting overall activity and arousal levels. Thus, this system has multiple levels of regulation; the SCN regulates circadian rhythms in gonadal hormone secretion, and hormones feed back to influence SCN functions.

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  1. Kashon ML, Arbogast JA, Sisk CL 1996 Distribution and hormonal regu- 5646 Endocrinology, December 2007, 148(12):5640 -5647 Karatsoreos and Silver • Minireview lation of androgen receptor immunoreactivity in the forebrain of the male European ferret. J Comp Neurol 376:567-586

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Authors
Karatsoreos, I. N., & Silver, R.
Affiliations
Columbia University (US)
Venue
Endocrinology
Published
2007-12-01
Volume
148
Issue
12
Pages
5640-5647
ISSN
  • 0013-7227 (ISSN-L)
  • 1945-7170
OpenAlex
W2116272264
Cited by
101
References
119
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 2 · 2022: 4 · 2021: 5 · 2020: 6 · 2019: 3 · 2018: 17 · 2017: 4 · 2016: 3 · 2015: 6 · 2014: 9 · 2013: 5 · 2012: 5
FWCI
0.59
Type
journal article
Language
en
Open access
Locations
  • Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Neurological Disorders and Stroke (NS-37919, NS 023224, R01NS037919)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
Keywords
suprachiasmatic nucleus, circadian rhythm, neuroendocrinology, androgen receptor, estrogen, arousal system, circadian activity, hypothalamus, circadian pacemaker
MeSH terms
Androgens, Animals, Circadian Rhythm, Estrogens, Mammals, Models, Biological, Neuroendocrinology, Suprachiasmatic Nucleus, Gonadal Hormones

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