1.1)Sino-Portugal TCM International Cooperation Center, the Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou 646000, China;2.2)Institute of Food Science and Technology, Chinese Academy of Agriculture Sciences (CAAS), Beijing 100193, China;3.3)Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou 646000, China;4.4)Department of Critical Care Medicine of Liver Disease, Beijing You-An Hospital, Capital Medical University, Beijing 100069, China;5.5)State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing 100094, China;6.6)National Key Laboratory of Human Factors Engineering, China Astronaut Research and Training Center, Beijing 100094, China;7.7)Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China;8.8)Dr Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
This work was supported by grants from the Opening Foundation of the State Key Laboratory of Space Medicine Fundamentals and Application, Chinese Astronaut Research and Training Center (SMFA18K06), the National Key Research and Development Program of China (2016YFE0131800) and the High-end Talents Recruitment Program (Liu Xinmin group) of Luzhou Municipal People’s Government.
Objective This study was designed to observe different durations of simulated weightlessness induced depressive-like behaviors and the change of superoxide dismutase (SOD) and catalase (CAT) in hippocampi of rats, so as to explore its effects and possible mechanism.Methods Weightlessness was simulated by hindlimb suspension by tails (HLS) in rats. The rats were divided into the control and the HLS groups for each respective week (s), i.e., 1, 2, 3, and 4. The depressive-like behaviors in rats were investigated by using the open field test (OFT), novel object recognition test (NORT), forced swim test (FST), followed by hippocampal protein level estimation of SOD and CAT by ELISA.Results The OFT results showed increased stagnation time among HLS rats in each respective group compared to their corresponding control groups (P<0.05, P<0.01). In the NORT, the latency of exploration increased, while the number and the time of exploration decreased in the HLS groups in each week, compared to their corresponding control rats (P<0.05, P<0.01). Similarly, FST displayed enhanced immobility with the reduced climbing rate in HLS rats in each respective week, compared to the normal rats (P<0.05, P<0.01). Simulated weightlessness significantly reduced the SOD and CAT levels in the hippocampi in HLS rats compared to the normal rats (P<0.05, P<0.01).Conclusion Results suggest that short or long weightlessness could induce depressive-like behaviors in rats.
ZHANG Mi-Jia, WANG Meng-Di, AYAZ Ahmed, DONG Li, YAO Qin-Wei, LI Ying-Hui, QU Li-Na, CHEN Shan-Guang, LIU Xin-Min, WANG Qiong. Different Durations of Simulated Weightlessness Induced Depressive-like Behaviors in Rats[J]. Progress in Biochemistry and Biophysics,2023,50(2):346-357
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