中国神经再生研究(英文版) ›› 2017, Vol. 12 ›› Issue (8): 1329-1337.doi: 10.4103/1673-5374.213554

• 原著:神经损伤修复保护与再生 • 上一篇    下一篇

右美托咪定可减轻妊娠中期胎鼠全麻药物致神经损伤

  

  • 收稿日期:2017-07-10 出版日期:2017-08-15 发布日期:2017-08-15
  • 基金资助:
    广东省医学科学研究基金项目(A2015619

Dexmedetomidine mitigates isoflurane-induced neurodegeneration in fetal rats during the second trimester of pregnancy

Zhi-yuan Su1, Qing Ye1, Xian-bao Liu1, Yu-zhong Chen1, Hong Zhan1, Shi-yuan Xu2   

  1. 1 Department of Anesthesia, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China;                                                    
    2 Department of Anesthesia, Zhujiang Hospital of Southern Medical University, Guangzhou, Guangdong Province, China
  • Received:2017-07-10 Online:2017-08-15 Published:2017-08-15
  • Contact: Zhi-yuan Su, M.D.,su_z_y@163.com.
  • Supported by:

    This study was supported by the Medical Scientific Research Foundation of Guangdong Province of China, No. A2015619.

摘要:

右美托咪定具有明显的神经保护作用,然而其是否能够减轻妊娠中期因使用异氟醚麻醉所致的胎儿大脑神经毒性,尚不清楚。实验给予孕14d大鼠持续吸入1.5%异氟醚4h,在吸入气体前15 min以及吸入气体2h时腹腔内注射右美托咪定5,10,20 μg/kg。结果显示,吸入1.5%异氟醚4h后,20 μg/kg右美托咪定能明显减轻异氟烷诱导的胎鼠大脑神经细胞的凋亡,减少大脑神经细胞凋亡,逆转脑源性神经营养因子表达的下调,减轻胎鼠成年后空间学习记忆能力的衰退。表明右美托咪定可减缓异氟醚对妊娠中期胎鼠大脑神经元的损伤程度,且脑源性神经营养因子参与此过程。

orcid:0000-0002-4975-3949(Zhi-yuan Su)

关键词: 神经再生, 右美托咪定, 异氟醚, 胎鼠, 细胞凋亡, 脑源性神经营养因子, 行为, 神经保护, 神经退行性疾病

Abstract:

Dexmedetomidine has significant neuroprotective effects. However, whether its protective effects can reduce neurotoxicity caused by isoflurane in fetal brain during the second trimester of pregnancy remains unclear. In this study, timed-pregnancy rats at gestational day 14 spontaneously inhaled 1.5% isoflurane for 4 hours, and were intraperitoneally injected with dexmedetomidine at dosages of 5, 10, 20, and 20 μg/kg 15 minutes before inhalation and after inhalation for 2 hours. Our results demonstrate that 4 hours after inhaling isoflurane, 20 μg/kg dexmedetomidine visibly mitigated isoflurane-induced neuronal apoptosis, reversed downregulation of brain-derived neurotrophic factor expression, and lessened decreased spatial learning and memory ability in adulthood in the fetal rats. Altogether, these findings indicate that dexmedetomidine can reduce neurodegeneration induced by isoflurane in fetal rats during the second trimester of pregnancy. Further, brain-derived neurotrophic factor participates in this process.

Key words: nerve regeneration, dexmedetomidine, isoflurane, fetal rat, apoptosis, brain-derived neurotrophic factor, behavior, neuroprotection, neurodegeneration, neural regeneration