Frontiers in Pharmacology (May 2017)

Dammarane Sapogenins Ameliorates Neurocognitive Functional Impairment Induced by Simulated Long-Duration Spaceflight

  • Xiaorui Wu,
  • Xiaorui Wu,
  • Dong Li,
  • Junlian Liu,
  • Lihong Diao,
  • Shukuan Ling,
  • Yuheng Li,
  • Jianyi Gao,
  • Quanchun Fan,
  • Weijia Sun,
  • Qi Li,
  • Dingsheng Zhao,
  • Guohui Zhong,
  • Dengchao Cao,
  • Min Liu,
  • Jiaping Wang,
  • Shuang Zhao,
  • Yu Liu,
  • Guie Bai,
  • Hongzhi Shi,
  • Zi Xu,
  • Jing Wang,
  • Chunmei Xue,
  • Xiaoyan Jin,
  • Xinxin Yuan,
  • Hongxing Li,
  • Caizhi Liu,
  • Huiyuan Sun,
  • Jianwei Li,
  • Yongzhi Li,
  • Yongzhi Li,
  • Yingxian Li

DOI
https://doi.org/10.3389/fphar.2017.00315
Journal volume & issue
Vol. 8

Abstract

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Increasing evidence indicates the occurrence of cognitive impairment in astronauts under spaceflight compound conditions, but the underlying mechanisms and countermeasures need to be explored. In this study, we found that learning and memory abilities were significantly reduced in rats under a simulated long-duration spaceflight environment (SLSE), which includes microgravity, isolation confinement, noises, and altered circadian rhythms. Dammarane sapogenins (DS), alkaline hydrolyzed products of ginsenosides, can enhance cognition function by regulating brain neurotransmitter levels and inhibiting SLSE-induced neuronal injury. Bioinformatics combined with experimental verification identified that the PI3K-Akt-mTOR pathway was inhibited and the MAPK pathway was activated during SLSE-induced cognition dysfunction, whereas DS substantially ameliorated the changes in brain. These findings defined the characteristics of SLSE-induced cognitive decline and the mechanisms by which DS improves it. The results provide an effective candidate for improving cognitive function in spaceflight missions.

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