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Single prolonged stress (SPS) is a well-established and most frequently used rat model to induce post-traumatic stress disorder (PTSD)-like symptoms, which helps to understand the neurobiological mechanisms as well as developing novel therapeutic strategies for PTSD. However, whether such stress model works efficiently in mice remains unknown. In the present study, we established a mouse SPS (mSPS) model by exposing C57BL/6J mice to a series of multimodal stressors on a single day, then the anxiety-like behavior was measured by open-field test, elevated plus maze test, dark-light box, and novelty-suppressed feeding test. Our results showed that mSPS had no significant effect on the anxiety-like behavior in mice after different days of recovery. The expression of the glucocorticoid receptor and brain-derived neurotrophic factor (BDNF), two proteins that highly associated with stress-related behaviors, also remained unaltered in both the amygdala and hippocampus. By contrast, the protein levels of NR2A and NR2B, two main subunits of the N-methyl-D-aspartate receptor (NMDAR), was reduced in the hippocampus, but not amygdala. In conclusion, our results indicate that mSPS may not be an efficient mouse model to explore the pathophysiology of PTSD-related anxiety-like behavior.


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Exposure to single prolonged stress fails to induce anxiety-like behavior in mice

Show Author's information Wen-Jie You1,§Ye He2,§Wei-Zhu Liu1Yu-Ge Zhu3Ping Hu3Bing-Xing Pan1Wen-Hua Zhang1( )
Laboratory of Fear and Anxiety Disorders, Institute of Life Science, Nanchang University, Nanchang 330031, China
Center for Basic Medical Experiment, Nanchang University, Nanchang 330031, China
Institute of Translational Medicine, Nanchang University, Nanchang 330031, China

§ Wen-Jie You and Ye He contributed equally to this work.

Abstract

Single prolonged stress (SPS) is a well-established and most frequently used rat model to induce post-traumatic stress disorder (PTSD)-like symptoms, which helps to understand the neurobiological mechanisms as well as developing novel therapeutic strategies for PTSD. However, whether such stress model works efficiently in mice remains unknown. In the present study, we established a mouse SPS (mSPS) model by exposing C57BL/6J mice to a series of multimodal stressors on a single day, then the anxiety-like behavior was measured by open-field test, elevated plus maze test, dark-light box, and novelty-suppressed feeding test. Our results showed that mSPS had no significant effect on the anxiety-like behavior in mice after different days of recovery. The expression of the glucocorticoid receptor and brain-derived neurotrophic factor (BDNF), two proteins that highly associated with stress-related behaviors, also remained unaltered in both the amygdala and hippocampus. By contrast, the protein levels of NR2A and NR2B, two main subunits of the N-methyl-D-aspartate receptor (NMDAR), was reduced in the hippocampus, but not amygdala. In conclusion, our results indicate that mSPS may not be an efficient mouse model to explore the pathophysiology of PTSD-related anxiety-like behavior.

Keywords:

post-traumatic stress disorder (PTSD), anxiety-like behavior, single prolonged stress, mouse, glucocorticoid receptor, brain-derived neurotrophic factor (BDNF)
Received: 11 January 2020 Revised: 28 July 2020 Accepted: 27 October 2020 Published: 01 February 2021 Issue date: December 2021
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Publication history
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Publication history

Received: 11 January 2020
Revised: 28 July 2020
Accepted: 27 October 2020
Published: 01 February 2021
Issue date: December 2021

Copyright

© The Author(s) 2020

Acknowledgements

This work was supported by grants from the National Natural Science Foundation of China (Nos. 31970953, 81930032, 81760505, and 81771459), Natural Science Foundation of Jiangxi Province (Nos. 20192ACB21024 and 20192ACB20023).

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