中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (25): 3977-3982.doi: 10.3969/j.issn.2095-4344.2017.25.007

• 脂肪干细胞 adipose-derived stem cells • 上一篇    下一篇

生长相关蛋白43基因修饰脂肪间充质干细胞对视网膜色素变性的修复及保护

高俊彦1,张 芸2,李 明1,刘学敏1,武志兵1,曹燕飞3   

  1. 长治医学院,1解剖教研室,3生化教研室,山西省长治市  0460002长治医学院附属和平医院,山西省长治市  046000
  • 修回日期:2017-03-15 出版日期:2017-09-08 发布日期:2017-10-09
  • 通讯作者: 曹燕飞,副教授,长治医学院生化教研室,山西省长治市 046000
  • 作者简介:高俊彦,男,1979年生,汉族,山西省阳泉市人,讲师,硕士,主要从事人体解剖方面研究。
  • 基金资助:

    2016年度山西省高等学校科技创新项目(2016175);长治医学院校级创新团队支持项目(CY201414)

Growth-associated protein-43 gene modified adipose-derived mesenchymal stem cells protect against retinitis pigmentosa

Gao Jun-yan1, Zhang Yun2, Li Ming1, Liu Xue-min1, Wu Zhi-bing1, Cao Yan-fei3   

  1. 1Department of Anatomy, 3Department of Biochemistry, Changzhi Medical College, Changzhi 046000, Shanxi Province, China; 2Heping Hospital of Changzhi Medical College, Changzhi 046000, Shanxi Province, China
  • Revised:2017-03-15 Online:2017-09-08 Published:2017-10-09
  • Contact: Cao Yan-fei, Associate professor, Department of Biochemistry, Changzhi Medical College, Changzhi 046000, Shanxi Province, China
  • About author:Gao Jun-yan, Master, Lecturer, Department of Anatomy, Changzhi Medical College, Changzhi 046000, Shanxi Province, China
  • Supported by:

    the Scientific Innovation Project of Shanxi High Education in 2016, No. 2016175; Innovation Team Supporting Project of Changzhi Medical College, No. CY201414

摘要:

文章快速阅读:

 

文题释义:
生长相关蛋白43:
可参与细胞的吞噬作用,能够调节神经胶质细胞和神经元的形态变化,在视网膜的发育中也具有重要作用,在视觉系统的发展阶段主要在视网膜神经节细胞中表达,在光感受器细胞中几乎不表达,在成熟的视网膜中不表达,在视神经的再生中只在神经纤维层和神经节细胞层有表达;能够表达生长相关蛋白43的视网膜细胞具有比较高的可塑性,在维持视网膜结构完整上具有重要作用。
视网膜色素变性的基因治疗:是利用RNA干扰技术置换致病基因,使致病基因沉默,或者将载体DNA整合到视网膜细胞内,不同视网膜变性阶段采用不同的基因治疗方法,当视网膜细胞结构完整时,可通过RNA干扰技术抑制突变体转录或者使用基因替代遗传缺陷;当视网膜细胞的功能结构发生变化时,主要通过转导表达神经营养因子及抗凋亡基因发挥视网膜保护作用。

 

摘要
背景:
研究发现基因治疗和细胞移植治疗视网膜色素变性有效果,而且二者相结合治疗视网膜色素变性效果更为显著,但其作用机制有待深入研究。
目的:探讨生长相关蛋白43基因修饰脂肪间充质干细胞对视网膜色素变性大鼠视网膜的保护作用。
方法:分离和培养视网膜色素变性大鼠脂肪间充质干细胞,以生长相关蛋白43慢病毒载体转染脂肪间充质干细胞。将60只视网膜色素变性大鼠分3组干预,实验组视网膜下腔注射生长相关蛋白43慢病毒载体转染的脂肪间充质干细胞,对照组注射脂肪间充质干细胞,假手术组注射PBS,注射后3,7,14,21 d,观察眼球组织脂肪间充质干细胞变化及视网膜生长相关蛋白43表达;注射后28 d,观察视网膜Rho蛋白、GS蛋白表达及外核层厚度。
结果与结论:①实验组脂肪间充质干细胞移植后,随着时间的延长,生长相关蛋白43表达量逐渐升高,不同时间点间两两比较差异均有显著性意义(P < 0.05);②实验组、对照组Rho蛋白和GS蛋白表达量高于假手术组(P < 0.05);实验组Rho蛋白表达量高于对照组(P < 0.05),GS蛋白表达量低于对照组(P < 0.05);③实验组、对照组视网膜外核层厚度高于假手术组(P < 0.05),实验组视网膜外核层厚度高于对照组(P < 0.05);④结果表明,生长相关蛋白43基因修饰的脂肪间充质干细胞,对视网膜色素变性大鼠模型视网膜具有保护作用。

 

关键词: 干细胞, 脂肪干细胞, 生长相关蛋白43基因, 脂肪间充质干细胞, 大鼠, 视网膜, Rho蛋白, GS蛋白

Abstract:

BACKGROUND: Gene therapy and cell transplantation therapy, especially their combined use, have certain therapeutic effects on retinitis pigmentosa. However, little attention has been paid to the combination of gene therapy and cell transplantation in the treatment of retinitis pigmentosa.
OBJECTIVE: To investigate the protective effect of adipose-derived mesenchymal stem cells (ADMSCs) modified by growth-associated protein-43 (GAP-43) gene on the retina of rats with retinitis pigmentosa.
METHODS: ADMSCs from rats with retinitis pigmentosa were isolated and cultured, and then transfected with GAP-43 lentiviral vector. Sixty retinitis pigmentosa rats were randomized into experimental group (subretinal injection of GAP-43-transfected ADMSCs), control group (subretinal injection of ADMSCs) and sham operation group (PBS injection). The expressions of GAP-43 protein, Rho protein and GS protein in the retina of rats were determined by western blot. The outer nuclear layer thickness of the retina was determined by hematoxylin-eosin staining.
RESULTS AND CONCLUSION: After transfected cell transplantation, the expression of GAP-43 protein in the retina was gradually increased with time and showed significant differences at different time post-transplantation (P < 0.05). The expression levels of Rho protein and GS protein in the retina of experimental and control groups were higher than that in the sham operation group (P < 0.05). The expression of Rho protein in the retina of the experimental group was higher than that in the control group (P < 0.05). The expression of GS protein in the retina of the experimental group was lower than that in the control group (P < 0.05). The thickness of retinal outer nuclear layer was ranked as follows: the experimental group > the control group > the sham group, and there was significant difference between groups (P < 0.05). These results show that the ADMSCs modified by GAP-43 gene have protective effect on the retina of rats with retinitis pigmentosa.

 

Key words: Stem Cells, Mesenchymal Stem Cells, GAP-43 Protein, Retinal Degeneration, Tissue Engineering

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