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Article

Dose response of dexmedetomidine‑induced resistance to hypoxia in mice

  • Authors:
    • Wanying Pan
    • Xiaoxiao Hua
    • Yueting Wang
    • Ruixian Guo
    • Jingfu Chen
    • Liqiu Mo
  • View Affiliations / Copyright

    Affiliations: Department of Anesthesiology, The First Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China, Department of Physiology, Zhongshan Medical College, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China, Department of Cardiovasology and Cardiac Care Unit, Huangpu Division of The First Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
  • Pages: 3237-3242
    |
    Published online on: August 4, 2016
       https://doi.org/10.3892/mmr.2016.5588
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Abstract

Tolerance to hypoxia can be induced by reducing oxygen consumption. Dexmedetomidine (DEX) decreases locomotor activity and induces bradycardia and hypothermia in mice. The present study examined the hypothesis that DEX improves hypoxia tolerance in mice. Adult mice received an intraperitoneal injection of 1, 5, 10, 20, 40, 80, 160 or 320 µg/kg DEX, 20 mg/kg propranolol or saline. Acute hypoxic conditions were induced by placing the mice in a limited enclosed container with soda lime. Core body temperature (CBT) and heart rate (HR) were measured prior to and 30 min after drug administration. Survival time was monitored in the sealed container. Survival times (mean ± standard deviation) of mice in the saline, 1, 5, 10, 20, 40, 80, 160 and 320 µg/kg DEX, and the 20 mg/kg propranolol groups were 22.4±1.1, 23.4±1.1, 26.0±0.9, 36.9±5.2, 42.4±2.9, 43.2±2.3, 58.2±4.2, 80.5±4.0, 79.2±6.0, and 38.2±2.8 min, respectively. Pretreatment with propranolol and 10, 20, 40, 80, 160 or 320 µg/kg DEX, but not 1 or 5 µg/kg, significantly prolonged survival time compared with saline‑injected mice (P<0.05 or P<0.01). CBT and HR decreased in a similar manner. The correlation coefficients between survival time and CBT, and survival time and HR were ‑0.802 and ‑0.726, respectively. Thus, DEX dose‑dependently enhances hypoxia tolerance in mice. In conclusion, it is suggested that DEX may be used in clinical practice as a novel protective agent for organs and tissues during hypoxic injury.
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Copy and paste a formatted citation
Spandidos Publications style
Pan W, Hua X, Wang Y, Guo R, Chen J and Mo L: Dose response of dexmedetomidine‑induced resistance to hypoxia in mice. Mol Med Rep 14: 3237-3242, 2016.
APA
Pan, W., Hua, X., Wang, Y., Guo, R., Chen, J., & Mo, L. (2016). Dose response of dexmedetomidine‑induced resistance to hypoxia in mice. Molecular Medicine Reports, 14, 3237-3242. https://doi.org/10.3892/mmr.2016.5588
MLA
Pan, W., Hua, X., Wang, Y., Guo, R., Chen, J., Mo, L."Dose response of dexmedetomidine‑induced resistance to hypoxia in mice". Molecular Medicine Reports 14.4 (2016): 3237-3242.
Chicago
Pan, W., Hua, X., Wang, Y., Guo, R., Chen, J., Mo, L."Dose response of dexmedetomidine‑induced resistance to hypoxia in mice". Molecular Medicine Reports 14, no. 4 (2016): 3237-3242. https://doi.org/10.3892/mmr.2016.5588
Copy and paste a formatted citation
x
Spandidos Publications style
Pan W, Hua X, Wang Y, Guo R, Chen J and Mo L: Dose response of dexmedetomidine‑induced resistance to hypoxia in mice. Mol Med Rep 14: 3237-3242, 2016.
APA
Pan, W., Hua, X., Wang, Y., Guo, R., Chen, J., & Mo, L. (2016). Dose response of dexmedetomidine‑induced resistance to hypoxia in mice. Molecular Medicine Reports, 14, 3237-3242. https://doi.org/10.3892/mmr.2016.5588
MLA
Pan, W., Hua, X., Wang, Y., Guo, R., Chen, J., Mo, L."Dose response of dexmedetomidine‑induced resistance to hypoxia in mice". Molecular Medicine Reports 14.4 (2016): 3237-3242.
Chicago
Pan, W., Hua, X., Wang, Y., Guo, R., Chen, J., Mo, L."Dose response of dexmedetomidine‑induced resistance to hypoxia in mice". Molecular Medicine Reports 14, no. 4 (2016): 3237-3242. https://doi.org/10.3892/mmr.2016.5588
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