中国神经再生研究(英文版) ›› 2014, Vol. 9 ›› Issue (14): 1402-1408.doi: 10.4103/1673-5374.137596

• 原著:视神经损伤修复保护与再生 • 上一篇    

胆囊收缩素C端硫酸化八肽片段抑制视网膜色素上皮细胞凋亡的保护效应

  

  • 收稿日期:2014-05-24 出版日期:2014-07-25 发布日期:2014-07-25

Cholecystokinin octapeptide antagonizes apoptosis in human retinal pigment epithelial cells

Yuan Liu 1, Yueling Zhang 1, Zhaohui Gu 1, Lina Hao 2, Juan Du 1, Qian Yang 1, Suping Li 1, Liying Wang 1, Shilei Gong 3   

  1. 1 Department of Ophthalmology, First Central Hospital of Baoding, Baoding, Hebei Province, China
    2 Department of Ophthalmology, Hebei Province People’s Hospital, Shijiazhuang, Hebei Province, China
    3 Department of Endoscope Room, First Central Hospital of Baoding, Baoding, Hebei Province, China
  • Received:2014-05-24 Online:2014-07-25 Published:2014-07-25
  • Contact: Lina Hao, M.D., Department of Ophthalmology, Hebei Province People’s Hospital, Shijiazhuang, Hebei Province, China, 75765892@qq.com.

摘要:

关于胆囊收缩素C端硫酸化八肽片段(CCK-8)是否可预防由于脑损伤引起皮质胆碱能神经元损伤的问题已有相关探讨。实验假设CCK-8对损伤视网膜色素上皮细胞有保护作用,设计了以CCK-8干预人视网膜色素上皮细胞,再经过氧亚硝基阴离子诱导的实验方案。结果显示过氧亚硝基阴离子可以促进人视网膜色素上皮细胞凋亡,并增加凋亡相关蛋白Fas相关死亡域蛋白、Bax、Caspase-8和Bcl-2的表达,而CCK-8可抑制上述现象。提示过氧亚硝基阴离子通过影响Fas相关死亡域蛋白、Bax和caspase-8信号传导途径,促进细胞凋亡,而这一过程又能被具有保护效应的CCK-8所抑制。

关键词: 神经再生, 视网膜色素上皮细胞, 过氧亚硝基阴离子, 胆囊收缩素C端硫酸化八肽片段, 细胞凋亡, Fas相关死亡域蛋白, Bax, Caspase-8, Bcl-2

Abstract:

Although cholecystokinin octapeptide-8 is important for neurological function, its neuroprotective properties remain unclear. We speculated that cholecystokinin octapeptide-8 can protect human retinal pigment epithelial cells against oxidative injury. In this study, retinal pigment epithelial cells were treated with peroxynitrite to induce oxidative stress. Peroxynitrite triggered apoptosis in these cells, and increased the expression of Fas-associated death domain, Bax, caspa-
se-8 and Bcl-2. These changes were suppressed by treatment with cholecystokinin octapeptide-8. These results suggest that cholecystokinin octapeptide-8 can protect human retinal pigment epithelial cells against apoptosis induced by peroxynitrite.

Key words: nerve regeneration, retinal pigment epithelial cells, peroxynitrite, cholecystokinin octapeptide, apoptosis, Fas-associated death domain, Bax, Caspase-8, Bcl-2, neural regeneration