Cited by 43Hypothalamic control of reproductive hormonesNeuropeptides and Animal PhysiologyRegulation of Appetite and Obesity

Glutamatergic Neurokinin 3 Receptor Neurons in the Median Preoptic Nucleus Modulate Heat-Defense Pathways in Female Mice

Open access
Krajewski-Hall, Sally J, Miranda Dos Santos, Filipa, McMullen, Nathaniel T, Blackmore, Elise M, Rance, Naomi E·2019·Endocrinology

Abstract

We have proposed that arcuate neurons coexpressing kisspeptin, neurokinin B, and dynorphin (KNDy neurons) contribute to hot flushes via projections to neurokinin 3 receptor (NK3R)-expressing neurons in the median preoptic nucleus (MnPO). To characterize the thermoregulatory role of MnPO NK3R neurons in female mice, we ablated these neurons using injections of saporin toxin conjugated to a selective NK3R agonist. Loss of MnPO NK3R neurons increased the core temperature (TCORE) during the light phase, with the frequency distributions indicating a regulated shift in the balance point. The increase in TCORE in the ablated mice occurred despite changes in the ambient temperature and regardless of estrogen status. We next determined whether an acute increase in ambient temperature or higher TCORE would induce Fos in preoptic enhanced green fluorescent protein (EGFP)-immunoreactive neurons in Tacr3-EGFP mice. Fos activation was increased in the MnPO but no induction of Fos was found in NK3R (EGFP-immunoreactive) neurons. Thus, MnPO NK3R neurons are not activated by warm thermosensors in the skin or viscera and are not warm-sensitive neurons. Finally, RNAscope was used to determine whether Tacr3 (NK3R) mRNA was coexpressed with vesicular glutamate transporter 2 or vesicular γ-aminobutyric acid (GABA) transporter mRNA, markers of glutamatergic and GABAergic neurotransmission, respectively. In the MnPO, 94% of NK3R neurons were glutamatergic, but in the adjacent medial preoptic area, 97% of NK3R neurons were GABAergic. Thus, NK3R neurons in the MnPO are glutamatergic and play a role in reducing TCORE but are not activated by warm thermal stimuli (internal or external). These findings suggest that KNDy neurons modulate thermosensory pathways for heat defense indirectly via a subpopulation of glutamatergic MnPO neurons that express NK3R.

Integrity signals

Registry

Crossref · 10.1210/en.2018-00934

Cites

72 of 72 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

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?

  • Ablation of neurokinin 3 receptor-expressing neurons did not prevent the thermoregulatory effects of estradiol.

    “However, the ablation of neurokinin 3 receptor-expressing neurons did not prevent the thermoregulatory effects of estradiol, indicating that they are not essential for estrogen’s thermoregulatory effect [170].”
  • Neurokinin 3 receptor-expressing neurons are not essential for estrogen's thermoregulatory effect.

    “However, the ablation of neurokinin 3 receptor-expressing neurons did not prevent the thermoregulatory effects of estradiol, indicating that they are not essential for estrogen’s thermoregulatory effect [170].”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Krajewski-Hall, S. J., Miranda Dos Santos, F., McMullen, N. T., Blackmore, E. M., & Rance, N. E.
Affiliations
  • Department of Pathology, University of Arizona College of Medicine, Tucson, Arizona
  • University of Arizona (US)
Corresponding author
Rance, Naomi E
Venue
Endocrinology
Published
2019-02-07
Volume
160
Issue
4
Pages
803-816
ISSN
  • 0013-7227 (ISSN-L)
  • 1945-7170
OpenAlex
W2912192285
Cited by
42
References
72
Citations by year
2026: 3 · 2025: 6 · 2024: 5 · 2023: 9 · 2022: 3 · 2021: 8 · 2020: 7 · 2019: 1
FWCI
4.54
Type
journal article
Language
en
Open access
Locations
  • Endocrinology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute on Aging (R01 AG047887)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
neurokinin-3 receptor, median preoptic nucleus, thermoregulation, kisspeptin, neurokinin B, dynorphin, KNDy neurons, glutamatergic neurons, GABAergic neurons, core body temperature, TACR3, female mice, hot flashes
MeSH terms
Animals, Body Temperature Regulation, Dynorphins, Female, Hot Temperature, Neurons, Preoptic Area, Neurokinin B, Proto-Oncogene Proteins c-fos, Receptors, Neurokinin-3, Glutamic Acid, Hot Flashes, Mice, Kisspeptins

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