中国神经再生研究(英文版) ›› 2014, Vol. 9 ›› Issue (5): 513-518.doi: 10.4103/1673-5374.130077

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

缺氧缺血性脑损伤时微小RNA-9可对少突胶质细胞系基因1行负性调控

  

  • 收稿日期:2013-11-02 出版日期:2014-03-12 发布日期:2014-03-12
  • 基金资助:

    国家自然科学基金(81241022);北京市自然科学基金(7122045;7072023)

Negative regulation of miRNA-9 on oligodendrocyte lineage gene 1 during hypoxic-ischemic brain damage

Lijun Yang, Hong Cui, Ting Cao   

  1. Department of Pediatrics, Beijing Friendship Hospital, Capital Medical University, Beijing, China
  • Received:2013-11-02 Online:2014-03-12 Published:2014-03-12
  • Contact: Hong Cui, Department of Pediatrics, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China, cuiho-ng100@sina.com.
  • Supported by:

    This study was supported by the National Natural Science Foundation of China, No. 81241022; the Beijing Municipal Natural Science Foundation in China, No. 7122045, 7072023.

摘要:

有研究经生物信息学分析发现,miR-9可以与少突胶质细胞系基因1不完全互补地结合,但其是否对于少突胶质细胞系基因1具有调控作用目前尚无定论。实验对新生3 d的SD大鼠行静态全脑脑片培养,氧糖剥夺60 min行微小RNA-9的转染,并设质粒转染对照组。实时定量PCR检测结果发现,转染后的第1,3,7,14,21,28天,miR-9质粒转染组的少突胶质细胞系基因1的表达均低于质粒转染对照组。从转染后第3天起,随着培养天数的逐渐增加,各组少突胶质细胞系基因1的表达也逐渐增加,转染后第14 天达到高峰,第21 天开始下降。结果说明缺氧缺血性脑损伤时,微小RNA-9可能对脑组织少突胶质细胞系基因1存在负性调控作用。

关键词: 神经再生, 脑损伤, 微小RNA-9, 少突胶质细胞系基因1, 缺氧缺血, 脑损伤, 早产, 大鼠, 转染, 脑片培养, 实时定量PCR, 表达模式, 负调控, 国家自然科学基金

Abstract:

Oligodendrocyte lineage gene 1 plays a key role in hypoxic-ischemic brain damage and myelin repair. miRNA-9 is involved in the occurrence of many related neurological disorders. Bioinformatics analysis demonstrated that miRNA-9 complementarily, but incompletely, bound oligodendrocyte lineage gene 1, but whether miRNA-9 regulates oligodendrocyte lineage gene 1 remains poorly understood. Whole brain slices of 3-day-old Sprague-Dawley rats were cultured and divided into four groups: control group; oxygen-glucose deprivation group (treatment with 8% O2 + 92% N2 and sugar-free medium for 60 minutes); transfection control group (after oxygen and glucose deprivation for 60 minutes, transfected with control plasmid) and miRNA-9 transfection group (after oxygen and glucose deprivation for 60 minutes, transfected with miRNA-9 plasmid). From the third day of transfection, and with increasing culture days, oligodendrocyte lineage gene 1 expression increased in each group, peaked at 14 days, and then decreased at 21 days. Real-time quantitative PCR results, however, demonstrated that oligodendrocyte lineage gene 1 expression was lower in the miRNA-9 transfection group than that in the transfection control group at 1, 3, 7, 14, 21 and 28 days after transfection. Results suggested that miRNA-9 possibly negatively regulated oligodendrocyte lineage gene 1 in brain tissues during hypoxic-ischemic brain damage.

Key words: nerve regeneration, brain injury, miRNA-9, oligodendrocyte lineage gene 1, hypoxic-ischemic, brain damage, premature birth, brain slice culture, NSFC grant, neural regeneration