中国神经再生研究(英文版) ›› 2016, Vol. 11 ›› Issue (12): 1981-1989.doi: 10.4103/1673-5374.197142

• 原著:视神经损伤修复保护与再生 • 上一篇    下一篇

构建人视网膜神经营养因子质粒对视网膜色素上皮细胞活力的影响

  

  • 收稿日期:2016-11-03 出版日期:2016-12-31 发布日期:2016-12-31
  • 基金资助:
    国家自然科学基金(81271046); 北京市教委科技项目(KZ201510025025)

Construction of a plasmid for human brain-derived neurotrophic factor and its effect on retinal pigment epithelial cell viability

Bo-jing Yan, Zhi-zhong Wu, Wei-hua Chong, Gen-lin Li*   

  1. Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Sciences Key Lab, Beijing, China
  • Received:2016-11-03 Online:2016-12-31 Published:2016-12-31
  • Contact: Gen-lin Li, M.D., ligenlin2018@163.com.
  • Supported by:
    This study was supported by the National Natural Science Foundation of China, No. 81271046; the Joint Program of Beijing Municipal Natural Science Foundation (category B) and Beijing Educational Committee (key project), No. KZ201510025025.

摘要:

脑源性神经营养因子对视网膜色素变性的保护功能已成为视神经研究中的热点。然而目前并无适用于临床治疗视网膜色素变性的脑源性神经营养因子制剂。为此,实验构建了人视网膜来源的脑源性神经营养因子真核表达质粒,转染293T细胞,并使其高表达具有生物活性的脑源性神经营养因子,将高表达的脑源性神经营养因子(50 ng/mL)作用于人急性视网膜色素上皮19细胞(ARPE-19)共培养96 h。MTT实验显示,人ARPE-19细胞存活能力显著增强;Western blot检测显示,人ARPE-19细胞内促凋亡蛋白Bax水平下调,抗凋亡蛋白Bcl-2水平上调。实验成功构建了人视网膜来源的脑源性神经营养因子真核表达质粒,将其转染293T细胞可稳定释放活性脑源性神经营养因子,该因子可抑制人视网膜色素上皮细胞的凋亡,未来有希望用于开发其治疗产品。 

orcid: 0000-0002-4611-4386 (Gen-lin Li)

关键词: 神经再生, 神经退行性变, 脑源性神经营养因子, 视网膜色素变性, 视网膜, 视网膜色素上皮, 生物合成, 转染, 质粒, 绿色荧光蛋白, 凋亡, 细胞存活

Abstract: Several studies have investigated the protective functions of brain-derived neurotrophic factor (BDNF) in retinitis pigmentosa. However, a BDNF-based therapy for retinitis pigmentosa is not yet available. To develop an efcient treatment for fundus disease, an eukaryotic expression plasmid was generated and used to transfect human 293T cells to assess the expression and bioactivity of BDNF on acute retinal pigment epithelial-19 (ARPE-19) cells, a human retinal epithelial cell line. Afer 96 hours of co-culture in a Transwell chamber, ARPE- 19 cells exposed to BDNF secreted by 293T cells were more viable than ARPE-19 cells not exposed to secreted BDNF. Western blot assay showed that Bax levels were downregulated and that Bcl-2 levels were upregulated in human ARPE-19 cells exposed to BDNF. Furthermore, 293T cells transfected with the BDNF gene steadily secreted the protein. Te powerful anti-apoptotic function of this BDNF may be useful for the treatment of retinitis pigmentosa and other retinal degenerative diseases.

Key words: nerve regeneration, neurodegenerative disease, brain-derived neurotrophic factor, retinitis pigmentosa, retina, retinal pigment pithelium, biosynthesis, transfection, plasmids, green ?uorescent protein, apoptosis, cell survival, neural regeneration