中国神经再生研究(英文版) ›› 2016, Vol. 11 ›› Issue (11): 1851-1856.doi: 10.4103/1673-5374.194758

• 原著:视神经损伤修复保护与再生 • 上一篇    下一篇

神经生长因子干预对软脂酸损伤视网膜神经节细胞的保护

  

  • 出版日期:2016-11-30 发布日期:2016-11-30
  • 基金资助:
    中国国家自然科学基金项目(U1304815); 河南省科技重点项目(132102310097)

Nerve growth factor protects against palmitic acid-induced injury in retinal ganglion cells

Pan-shi Yan1, #, Shu Tang2, #, Hai-feng Zhang3, Yuan-yuan Guo4, Zhi-wen Zeng4, *, Qiang Wen5, *   

  1. "1 Department of Ophthalmology, First Afliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China 2 Department of Pharmacy, First Afliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China 3 Department of Biochemistry and Molecular Biology, School of Basic Medicine, Zhengzhou University, Zhengzhou, Henan Province, China 4 Shenzhen Mental Health Center and Shenzhen Key Lab for Psychological Healthcare, Shenzhen, Guangdong Province, China 5 Department of Clinical Pharmacology, School of Basic Medicine, Zhengzhou University, Zhengzhou, Henan Province, China"
  • Online:2016-11-30 Published:2016-11-30
  • Contact: Qiang Wen, Ph.D., or Zhi-wen Zeng, Ph.D., qiangwen7619@163.com or zengzw1122@163.com.
  • Supported by:
    This work was supported by the National Natural Science Foundation of China, No. U1304815; a grant from Key Project of Science and Technology Research of Henan Province of China, No. 132102310097.

摘要:

多项研究支持神经生长因子在糖尿病视网膜病变中发挥重要作用,因此我们拟揭示神经生长因子对糖尿病及其并发症的代谢产物软脂酸损伤的视网膜神经节细胞RGC-5细胞保护作用的机制。结果显示:(1)软脂酸干预可导致RGC-5细胞凋亡,而神经生长因子预处理呈浓度依赖性抑制软脂酸的作用;(2)神经生长因子能显著降低软脂酸抬升RGC-5细胞中活性氧及丙二醛的水平;(3)信号通路抑制剂研究显示,神经生长因子的保护作用可被PI3K抑制剂LY294002、Akt抑制剂VIII和Erk1/2抑制剂PD98059逆转;(4)Western blot分析结果显示,神经生长因子诱导Akt/FoxO1及Erk1/2蛋白磷酸化,并逆转这些蛋白由于软脂酸干预引发的表达减少现象;(5)结果证明了神经生长因子对软脂酸损伤RGC-5细胞发挥保护作用的机制与其调节PI3K/Akt和ERK1/2信号通路,发挥抗氧化及抑制细胞凋亡作用有关。 

orcid: 0000-0002-3437-2457 (Qiang Wen)

关键词: 神经再生, RGC-5细胞, 软脂酸, 神经生长因子, 细胞凋亡, PI3K, Akt, FoxO1, Erk1/2

Abstract: Accumulating evidence supports an important role for nerve growth factor (NGF) in diabetic retinopathy. We hypothesized that NGF has a protective effect on rat retinal ganglion RGC-5 cells injured by palmitic acid (PA), a metabolic factor implicated in the development of diabetes and its complications. Our results show that PA exposure caused apoptosis of RGC-5 cells, while NGF protected against PA insult in a concentration-dependent manner. Additionally, NGF signifcantly attenuated the levels of reactive oxygen species (ROS) and malondialdehyde (MDA) in RGC-5 cells. Pathway inhibitor tests showed that the protective effect of NGF was completely reversed by LY294002 (PI3K inhibitor), Akt VIII inhibitor, and PD98059 (ERK1/2 inhibitor). Western blot analysis revealed that NGF induced the phosphorylation of Akt/FoxO1 and ERK1/2 and reversed the PA-evoked reduction in the levels of these proteins. Tese results indicate that NGF protects RGC-5 cells against PA-induced injury through anti-oxidation and inhibition of apoptosis by modulation of the PI3K/Akt and ERK1/2 signaling pathways.

Key words: nerve regeneration, RGC-5 cells, palmitic acid, nerve growth factor, apoptosis, PI3K, Akt, FoxO1, ERK1/2, neural regeneration