中国神经再生研究(英文版) ›› 2023, Vol. 18 ›› Issue (9): 2075-2081.doi: 10.4103/1673-5374.367928

• 原著:神经损伤修复保护与再生 • 上一篇    下一篇

急性禁食有助于改善雌性去卵巢小鼠抑郁样行为

  

  • 出版日期:2023-09-15 发布日期:2023-03-07
  • 基金资助:
    国家自然科学基金项目(81871070),吉林省医疗卫生人才项目(2020SCZT021),长春市科技发展计划重点项目(21ZGY16)

Fasting produces antidepressant-like effects via activating mammalian target of rapamycin complex 1 signaling pathway in ovariectomized mice

Zi-Qian Cheng1, 2, #, Jie Fan1, 2, #, Fang-Yi Zhao1, 2, Jing-Yun Su1, 2, Qi-Han Sun1, 2, Ran-Ji Cui1, 2, *, Bing-Jin Li1, 2, *   

  1. 1Jilin Provincial Key Laboratory on Molecular and Chemical Genetic, The Second Hospital of Jilin University, Changchun, Jilin Province, China; 2Jilin Engineering Laboratory for Screening of Antidepressant, Changchun, Jilin Province, China
  • Online:2023-09-15 Published:2023-03-07
  • Contact: Ran-Ji Cui, PhD, cuiranji@jlu.edu.cn; Bing-Jin Li, PhD, libingjin@jlu.edu.cn.
  • Supported by:
    This study was supported by the National Natural Science Foundation of China, No. 81871070, Jilin Province Medical and Health Talents, No. 2020SCZT021, and Changchun City Science and Technology Development Plan Key Project, No. 21ZGY16 (all to BJL).

摘要:

既往研究发现,9h急性禁食可减少正常小鼠强迫游泳实验中不动时间,然而其是否也对雌性抑郁小鼠有治疗作用尚不明确。为此,实验以卵巢切除模拟围绝经期抑郁,7d后进行一次为期9h的禁食。结果发现,卵巢摘除延长了小鼠强迫游泳实验中不动时间,抑制了海马和前额叶皮质中哺乳动物雷帕霉素复合物靶点1信号通路蛋白的表达,降低了海马树突棘的密度;而9h急性禁食可缓解上述表现,且其作用可被哺乳动物雷帕霉素复合物靶点1抑制剂雷帕霉素所逆转。电生理数据显示,禁食显著增强卵巢摘除小鼠海马CA1区的长时程增强。由此说明,禁食产生的抗抑郁作用可能与海马中哺乳动物雷帕霉素复合物靶点1信号通路的激活和突触可塑性有关,提示禁食可能是治疗抑郁的潜在方法。

https://orcid.org/0000-0002-1129-3772 (Ran-Ji Cui); https://orcid.org/0000-0002-7509-3163 (Bing-Jin Li)

关键词: 禁食, 抗抑郁药, 脑源性神经营养因子, 哺乳动物雷帕霉素复合物靶点1, 树突棘, 长时程增强, 雷帕霉素, 神经可塑性, 海马, 卵巢切除

Abstract: Recent studies have shown that a 9-hour fast in mice reduces the amount of time spent immobile in the forced swimming test. However, whether 9-hour fasting has therapeutic effects in female mice with depressive symptoms has not been established. Therefore, in this study, we simulated perimenopausal depression via an ovariectomy in mice, and subjected them to a single 9-hour fasting 7 days later. We found that the ovariectomy increased the time spent immobile in the forced swimming test, inhibited expression of the mammalian target of rapamycin complex 1 signaling pathway in the hippocampus and prefrontal cortex, and decreased the density of dendritic spines in the hippocampus. The 9-hour acute fasting alleviated the above-mentioned phenomena. Furthermore, all of the antidepressant-like effects of 9-hour fasting were reversed by an inhibitor of the mammalian target of rapamycin complex 1. Electrophysiology data showed a remarkable increase in long-term potentiation in the hippocampal CA1 of the ovariectomized mice subjected to fasting compared with the findings in the ovariectomized mice not subjected to fasting. These findings show that the antidepressant-like effects of 9-hour fasting may be related to the activation of the mammalian target of the rapamycin complex 1 signaling pathway and synaptic plasticity in the mammalian hippocampus. Thus, fasting may be a potential treatment for depression.

Key words: antidepressant, brain-derived neurotrophic factor, dendritic spine, fasting, hippocampus, LTP, mTOR complex 1, neural plasticity, ovariectomized mice, rapamycin