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A sex-specific thermogenic neurocircuit induced by predator smell recruiting cholecystokinin neurons in the dorsomedial hypothalamus

Author

Listed:
  • Predrag Jovanovic

    (Cedars-Sinai Medical Center
    Cedars-Sinai Medical Center)

  • Allan-Hermann Pool

    (University of Texas Southwestern Medical Center)

  • Nancy Morones

    (Cedars-Sinai Medical Center
    Cedars-Sinai Medical Center)

  • Yidan Wang

    (Cedars-Sinai Medical Center
    Cedars-Sinai Medical Center)

  • Edward Novinbakht

    (Cedars-Sinai Medical Center
    Cedars-Sinai Medical Center)

  • Nareg Keshishian

    (Cedars-Sinai Medical Center
    Cedars-Sinai Medical Center)

  • Kaitlyn Jang

    (Cedars-Sinai Medical Center
    Cedars-Sinai Medical Center)

  • Yuki Oka

    (California Institute of Technology)

  • Celine E. Riera

    (Cedars-Sinai Medical Center
    Cedars-Sinai Medical Center
    Cedars-Sinai Medical Center)

Abstract

Olfactory cues are vital for prey animals like rodents to perceive and evade predators. Stress-induced hyperthermia, via brown adipose tissue (BAT) thermogenesis, boosts physical performance and facilitates escape. However, many aspects of this response, including thermogenic control and sex-specific effects, remain enigmatic. Our study unveils that the predator odor trimethylthiazoline (TMT) elicits BAT thermogenesis, suppresses feeding, and drives glucocorticoid release in female mice. Chemogenetic stimulation of olfactory bulb (OB) mitral cells recapitulates the thermogenic output of this response and associated stress hormone corticosterone release in female mice. Neuronal projections from OB to medial amygdala (MeA) and dorsomedial hypothalamus (DMH) exhibit female-specific cFos activity toward odors. Cell sorting and single-cell RNA-sequencing of DMH identify cholecystokinin (CCK)-expressing neurons as recipients of predator odor cues. Chemogenetic manipulation and neuronal silencing of DMHCCK neurons further implicate these neurons in the propagation of predator odor-associated thermogenesis and food intake suppression, highlighting their role in female stress-induced hyperthermia.

Suggested Citation

  • Predrag Jovanovic & Allan-Hermann Pool & Nancy Morones & Yidan Wang & Edward Novinbakht & Nareg Keshishian & Kaitlyn Jang & Yuki Oka & Celine E. Riera, 2023. "A sex-specific thermogenic neurocircuit induced by predator smell recruiting cholecystokinin neurons in the dorsomedial hypothalamus," Nature Communications, Nature, vol. 14(1), pages 1-19, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40484-7
    DOI: 10.1038/s41467-023-40484-7
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    References listed on IDEAS

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