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Establishment of a chronic insomnia rat model of sleep fragmentation using unstable platforms surrounded by water

  • Authors:
    • De-Qi Yan
    • Xing-Ping Zhang
    • Wen-Hui Zhang
    • Ning Deng
    • Zheng-Ting Liang
    • Tao Liu
    • Guan-Ying Wang
    • Qian-Wei Yao
    • Kai-Kai Wang
    • Zhen-Peng Tong
  • View Affiliations / Copyright

    Affiliations: The Fourth Clinical Medicine College, Xinjiang Medical University, Urumqi, Xinjiang 830017, P.R. China, Department of Internal Medicine, Traditional Chinese Medicine Hospital Affiliated to Xinjiang Medical University, Urumqi, Xinjiang 830017, P.R. China
    Copyright: © Yan et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Article Number: 233
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    Published online on: April 3, 2023
       https://doi.org/10.3892/etm.2023.11932
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Abstract

Chronic fragmented sleep is a very common type of insomnia that affects the daily lives of numerous people around the world. However, its pathogenesis is not very clear and a corresponding rat model has not been reported for this purpose at present. The present study aimed to establish a rat model of chronic insomnia with sleep fragmentation using self‑made multiple strings of unstable platforms surrounded by shallow water. During the establishment of the models, changes in body weight and differences in food and water intake in the daytime and at night were acquired. The rat models were assessed using several tests, including the Morris water maze test, pentobarbital sodium‑induced sleep, infrared monitoring and electroencephalogram/electromyography during sleep. The expression levels of certain inflammatory factors and orexin A were detected in the serum and brain tissues using ELISAs, immunohistochemistry and immunofluorescence. The expression levels of orexin 1 receptor (orexin 1r) were also detected in the brain. Polysomnography indicated that the model rats were successfully prepared with reduced non‑rapid eye movement (non‑REM) sleep in the daytime, which was increased at night, and considerably lower REM duration during the day and night. The number of instances of sleep arousals were also increased in the day and at night, and the average duration of each sleep bout was decreased in the daytime. The body weights of the model rats increased at a normal rate. However, the reduction of body weight in the daytime and increased in body weight at night were significantly less than those of the control rats. The daytime food and water consumption of the model rats increased significantly compared with that of the control rats, but was similar to that of the control group at night. The Morris water maze test indicated that the model rats were slow to learn to escape the platforms and performed a lower number of target crossings. The pentobarbital‑induced sleep experiment confirmed that the model rats exhibited a longer sleep latency and shorter sleep time. The serum IL‑1β, IL‑6, TNF‑α and orexin A levels of the model rats were significantly increased, whereas their serum IL‑10 levels were significantly decreased compared with those of the control rats. The expression levels of IL‑1β, IL‑6, orexin A and orexin 1r in the brain tissues of the model rats were also significantly increased. In conclusion, these data indicate that learning and memory function, sleep time, arousal times, diurnal and nocturnal body weight changes, food and water intake, and expression levels of the specific inflammatory factors orexin A and orexin 1r were altered in the model rats. This suggests the chronic insomnia rat model with sleep fragmentation was successfully established using multiple strings of unstable platforms surrounded by water.
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Copy and paste a formatted citation
Spandidos Publications style
Yan D, Zhang X, Zhang W, Deng N, Liang Z, Liu T, Wang G, Yao Q, Wang K, Tong Z, Tong Z, et al: Establishment of a chronic insomnia rat model of sleep fragmentation using unstable platforms surrounded by water. Exp Ther Med 25: 233, 2023.
APA
Yan, D., Zhang, X., Zhang, W., Deng, N., Liang, Z., Liu, T. ... Tong, Z. (2023). Establishment of a chronic insomnia rat model of sleep fragmentation using unstable platforms surrounded by water. Experimental and Therapeutic Medicine, 25, 233. https://doi.org/10.3892/etm.2023.11932
MLA
Yan, D., Zhang, X., Zhang, W., Deng, N., Liang, Z., Liu, T., Wang, G., Yao, Q., Wang, K., Tong, Z."Establishment of a chronic insomnia rat model of sleep fragmentation using unstable platforms surrounded by water". Experimental and Therapeutic Medicine 25.5 (2023): 233.
Chicago
Yan, D., Zhang, X., Zhang, W., Deng, N., Liang, Z., Liu, T., Wang, G., Yao, Q., Wang, K., Tong, Z."Establishment of a chronic insomnia rat model of sleep fragmentation using unstable platforms surrounded by water". Experimental and Therapeutic Medicine 25, no. 5 (2023): 233. https://doi.org/10.3892/etm.2023.11932
Copy and paste a formatted citation
x
Spandidos Publications style
Yan D, Zhang X, Zhang W, Deng N, Liang Z, Liu T, Wang G, Yao Q, Wang K, Tong Z, Tong Z, et al: Establishment of a chronic insomnia rat model of sleep fragmentation using unstable platforms surrounded by water. Exp Ther Med 25: 233, 2023.
APA
Yan, D., Zhang, X., Zhang, W., Deng, N., Liang, Z., Liu, T. ... Tong, Z. (2023). Establishment of a chronic insomnia rat model of sleep fragmentation using unstable platforms surrounded by water. Experimental and Therapeutic Medicine, 25, 233. https://doi.org/10.3892/etm.2023.11932
MLA
Yan, D., Zhang, X., Zhang, W., Deng, N., Liang, Z., Liu, T., Wang, G., Yao, Q., Wang, K., Tong, Z."Establishment of a chronic insomnia rat model of sleep fragmentation using unstable platforms surrounded by water". Experimental and Therapeutic Medicine 25.5 (2023): 233.
Chicago
Yan, D., Zhang, X., Zhang, W., Deng, N., Liang, Z., Liu, T., Wang, G., Yao, Q., Wang, K., Tong, Z."Establishment of a chronic insomnia rat model of sleep fragmentation using unstable platforms surrounded by water". Experimental and Therapeutic Medicine 25, no. 5 (2023): 233. https://doi.org/10.3892/etm.2023.11932
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