Cited by 41Circadian rhythm and melatoninNeuropeptides and Animal PhysiologyHypothalamic control of reproductive hormones

Daily rhythms and sex differences in vasoactive intestinal polypeptide, VIPR2 receptor and arginine vasopressin mRNA in the suprachiasmatic nucleus of a diurnal rodent, Arvicanthis niloticus

Open access
Mahoney, M. M., Ramanathan, C., Hagenauer, M. H., Thompson, R. C., Smale, L., Lee, T.·2009·European Journal of Neuroscience

Abstract

Diurnal and nocturnal animals differ with respect to the time of day at which the ovulatory surge in luteinizing hormone occurs. In some species this is regulated by the suprachiasmatic nucleus (SCN), the primary circadian clock, via cells that contain vasoactive intestinal polypeptide (VIP) and vasopressin (AVP). Here, we evaluated the hypothesis that chronotype differences in the timing of the luteinizing hormone surge are associated with rhythms in expression of the genes that encode these neuropeptides. Diurnal grass rats (Arvicanthis niloticus) were housed in a 12/12-h light-dark cycle and killed at one of six times of day (Zeitgeber time 1, 5, 9, 13, 17, 21; ZT 0 = lights-on). In-situ hybridization was used to compare levels of vip, avp and VIP receptor mRNA (vipr2) in the SCN of intact females, ovariectomized females, ovariectomized females given estradiol and intact males. We found a sex difference in vip rhythms with a peak occurring at ZT 13 in males and ZT 5 in intact females. In all groups avp mRNA rhythms peaked during the day, from ZT 5 to ZT 9, and had a trough in the dark at ZT 21. There was a modest rhythm and sex difference in the pattern of vipr2. Most importantly, the patterns of each of these SCN rhythms relative to the light-dark cycle resembled those seen in nocturnal rodents. Chronotype differences in timing of neuroendocrine events associated with ovulation are thus likely to be generated downstream of the SCN.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1111/j.1460-9568.2009.06936.x

Cites

44 of 44 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Estrogen can alter the phasing of neurotransmitter rhythms in the SCN.

    “Estrogen can also alter the phasing of neurotransmitter rhythms in the SCN [41, 97, 107].”
  • Ovariectomy causes an 8 hour delay in the VIP transcript rhythm in the SCN, so that its phasing resembles that of intact males.

    “In the case of VIP, which is a neurotransmitter that is important for oscillator coupling, ovariectomy causes a remarkable 8 hour delay, so that the phasing of the transcript rhythm resembles that of intact males [97, 107].”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Mahoney, M. M., Ramanathan, C., Hagenauer, M. H., Thompson, R. C., Smale, L., & Lee, T.
Affiliations
  • University of Illinois Urbana-Champaign (US)
  • Michigan State University (US)
  • University of Michigan (US)
Corresponding author
Mahoney, M. M.
Venue
European Journal of Neuroscience
Publisher
Wiley
Published
2009-10
Volume
30
Issue
8
Pages
1537-1543
ISSN
  • 0953-816X (ISSN-L)
  • 1460-9568
OpenAlex
W2042670853
Cited by
41
References
44
Citations by year
2026: 2 · 2025: 1 · 2024: 4 · 2023: 4 · 2021: 5 · 2020: 5 · 2019: 1 · 2018: 3 · 2016: 2 · 2015: 1 · 2013: 3 · 2012: 4
FWCI
1.46
Type
journal article
Language
en
Open access
Locations
  • European Journal of Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Deep Blue (University of Michigan) (submittedVersion)
Funders
  • National Science Foundation
  • National Institutes of Health
  • National Institute of Mental Health (R01MH053433, MH69518, R03MH069518)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (T32HD007048)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
suprachiasmatic nucleus, vasoactive intestinal peptide, vasopressin, circadian rhythm, sex differences, chronotype, diurnal rodents, Arvicanthis niloticus, luteinizing hormone surge, ovulation, ovariectomy, estradiol, light-dark cycle, gene expression
MeSH terms
Animals, Arginine Vasopressin, Circadian Rhythm, Arvicolinae, Estradiol, Estrogens, Female, Gene Expression Regulation, Male, Ovariectomy, RNA, Messenger, Sexual Behavior, Animal, Sex Characteristics, Suprachiasmatic Nucleus, Receptors, Vasoactive Intestinal Peptide, Type II

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review