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Article

Interleukin-6 is important for regulation of core body temperature during long-term cold exposure in mice

  • Authors:
    • Emil Egecioglu
    • Fredrik Anesten
    • Erik Schéle
    • Vilborg Palsdottir
  • View Affiliations / Copyright

    Affiliations: Department of Physiology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, 413 90 Gothenburg, Sweden
  • Pages: 206-212
    |
    Published online on: July 2, 2018
       https://doi.org/10.3892/br.2018.1118
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Abstract

Interleukin-6 (IL6) is a cytokine important for inducing the fever response during infection and has been reported to uphold core body temperature during acute cold exposure. Recently it has also been indicated that IL6 in serum increases in cold-exposed mice. The aim of the present study was to investigate if IL6 is important for core body temperature regulation following a long-term cold exposure in mice. Experiments were performed with global IL6 deficient (-/-) mice, mice with conditional IL6 receptor α (IL6Rα) knockdown in the central nervous system (CNS; IL6RαNesCre) and appropriate wild-type (Wt) controls. All mice were placed in a cold environment (4˚C) for 6 days. Core body temperature and oxygen consumption were measured by telemetry probes and indirect calorimetry at room temperature (20˚C), and during the first and last day of cold exposure. Brain stem, hypothalamus and white and brown adipose tissues from the cold-exposed mice were subjected to gene expression analysis. After 6 days in 4˚C, the IL6-/- mice exhibited significantly lower body temperature and oxygen consumption compared with Wt mice (P<0.05). The IL6RαNesCre mice also exhibited lower body temperature compared with WtNesCre controls during the last day of cold exposure (P<0.05). Furthermore, an increase in the mRNA level of brain-derived neurotrophic factor (Bdnf) was detected in the brain stem of both IL6-/- and IL6RαNesCre mice compared with the Wt groups (P<0.05). The finding that body temperature was decreased in IL6-/- and IL6RαNesCre mice indicates a decrease in thermogenesis in these animals. Bdnf has previously been indicated to increase body temperature and could in the present study be a mechanistic factor involved in counteracting the low body temperature in IL6-/- and IL6RαNesCre mice. These results suggest that IL6 is not only involved in body temperature regulation during infection, but also during long-term cold exposure, probably through mechanisms in the CNS.
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Copy and paste a formatted citation
Spandidos Publications style
Egecioglu E, Anesten F, Schéle E and Palsdottir V: Interleukin-6 is important for regulation of core body temperature during long-term cold exposure in mice. Biomed Rep 9: 206-212, 2018.
APA
Egecioglu, E., Anesten, F., Schéle, E., & Palsdottir, V. (2018). Interleukin-6 is important for regulation of core body temperature during long-term cold exposure in mice. Biomedical Reports, 9, 206-212. https://doi.org/10.3892/br.2018.1118
MLA
Egecioglu, E., Anesten, F., Schéle, E., Palsdottir, V."Interleukin-6 is important for regulation of core body temperature during long-term cold exposure in mice". Biomedical Reports 9.3 (2018): 206-212.
Chicago
Egecioglu, E., Anesten, F., Schéle, E., Palsdottir, V."Interleukin-6 is important for regulation of core body temperature during long-term cold exposure in mice". Biomedical Reports 9, no. 3 (2018): 206-212. https://doi.org/10.3892/br.2018.1118
Copy and paste a formatted citation
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Spandidos Publications style
Egecioglu E, Anesten F, Schéle E and Palsdottir V: Interleukin-6 is important for regulation of core body temperature during long-term cold exposure in mice. Biomed Rep 9: 206-212, 2018.
APA
Egecioglu, E., Anesten, F., Schéle, E., & Palsdottir, V. (2018). Interleukin-6 is important for regulation of core body temperature during long-term cold exposure in mice. Biomedical Reports, 9, 206-212. https://doi.org/10.3892/br.2018.1118
MLA
Egecioglu, E., Anesten, F., Schéle, E., Palsdottir, V."Interleukin-6 is important for regulation of core body temperature during long-term cold exposure in mice". Biomedical Reports 9.3 (2018): 206-212.
Chicago
Egecioglu, E., Anesten, F., Schéle, E., Palsdottir, V."Interleukin-6 is important for regulation of core body temperature during long-term cold exposure in mice". Biomedical Reports 9, no. 3 (2018): 206-212. https://doi.org/10.3892/br.2018.1118
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