Estradiol alters body temperature regulation in the female mouse

Sally J. Krajewski-Hall, Elise M. Blackmore, Jessi R. McMinn, Naomi E Rance

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Hot flushes are due to estrogen withdrawal and characterized by the episodic activation of heat dissipation effectors. Recent studies (in humans and rats) have implicated neurokinin 3 (NK3) receptor signaling in the genesis of hot flushes. Although transgenic mice are increasingly used for biomedical research, there is limited information on how 17β-estradiol and NK3 receptor signaling alters thermoregulation in the mouse. In this study, a method was developed to measure tail skin temperature (TSKIN) using a small data-logger attached to the surface of the tail, which, when combined with a telemetry probe for core temperature (TCORE), allowed us to monitor thermoregulation in freely-moving mice over long durations. We report that estradiol treatment of ovariectomized mice reduced TCORE during the light phase (but not the dark phase) while having no effect on TSKIN or activity. Estradiol also lowered TCORE in mice exposed to ambient temperatures ranging from 20 to 36°C. Unlike previous studies in the rat, estradiol treatment of ovariectomized mice did not reduce TSKIN during the dark phase. Subcutaneous injections of an NK3 receptor agonist (senktide) in ovariectomized mice caused an acute increase in TSKIN and a reduction in TCORE, consistent with the activation of heat dissipation effectors. These changes were reduced by estradiol, suggesting that estradiol lowers the sensitivity of central thermoregulatory pathways to NK3 receptor activation. Overall, we show that estradiol treatment of ovariectomized mice decreases TCORE during the light phase, reduces the thermoregulatory effects of senktide and modulates thermoregulation differently than previously described in the rat.

Original languageEnglish (US)
Pages (from-to)56-69
Number of pages14
JournalTemperature
Volume5
Issue number1
DOIs
StatePublished - Jan 2 2018

Fingerprint

Body Temperature Regulation
Neurokinin-3 Receptors
Estradiol
Skin Temperature
Tail
Hot Temperature
Light
Telemetry
Temperature
Subcutaneous Injections
Transgenic Mice
Biomedical Research
Estrogens
Therapeutics

Keywords

  • estrogen
  • hot flush
  • kisspeptin
  • menopause
  • neurokinin B
  • vasodilation

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

Cite this

Estradiol alters body temperature regulation in the female mouse. / Krajewski-Hall, Sally J.; Blackmore, Elise M.; McMinn, Jessi R.; Rance, Naomi E.

In: Temperature, Vol. 5, No. 1, 02.01.2018, p. 56-69.

Research output: Contribution to journalArticle

Krajewski-Hall, Sally J. ; Blackmore, Elise M. ; McMinn, Jessi R. ; Rance, Naomi E. / Estradiol alters body temperature regulation in the female mouse. In: Temperature. 2018 ; Vol. 5, No. 1. pp. 56-69.
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