中国神经再生研究(英文版) ›› 2023, Vol. 18 ›› Issue (10): 2315-2320.doi: 10.4103/1673-5374.369123

• 原著:视神经损伤修复保护与再生 • 上一篇    

脂肪间充质干细胞来源细胞外囊泡可减轻谷氨酸诱导的视网膜兴奋性神经毒性损伤

  

  • 出版日期:2023-10-15 发布日期:2023-03-29
  • 基金资助:
    国家重点研发计划项目(2016YFC1201800);湖南省重点研发计划项目(2018SK2090,2022SK2079);湖南省自然科学基金资助项目(2021JJ30891);湖南省人力资源银行项目(2020TP003);中南大学校企联合项目(2021XQLH092)

Adipose mesenchymal stem cell-derived extracellular vesicles reduce glutamate-induced excitotoxicity in the retina

Tian-Qi Duan1, Zhao-Lin Gao1, Ai-Xiang Luo1, Dan Chen1, Jian-Bin Tong2, Ju-Fang Huang1, *   

  1. 1Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Changsha, Hunan Province, China; 2Hunan Province Key Laboratory of Brain Homeostasis, Third Xiangya Hospital, Central South University, Changsha, Hunan Province, China
  • Online:2023-10-15 Published:2023-03-29
  • Contact: Ju-Fang Huang, PhD, huangjufang@csu.edu.cn.
  • Supported by:
    This study was supported by the National Key R&D Program of China, No. 2016YFC1201800 (to JFH); the Key Research and Development Program of Hunan Province, Nos. 2018SK2090 (to JFH), 2022SK2079 (to JFH); the Natural Science Foundation of Hunan Province, No. 2021JJ30891 (to DC); the Human Resource Bank Program of Hunan Province, No. 2020TP3003 (to JFH); and the School-Enterprise Joint Program of Central South University, No. 2021XQLH092 (to TQD).

摘要:

脂肪间充质干细胞对谷氨酸诱导的兴奋性毒性损伤有保护作用,但间充质干细胞治疗视神经损伤仍存在局限。研究发现,脂肪间充质干细胞旁分泌的细胞外囊泡,具有脂肪间充质干细胞功能的同时,还拥有非免疫原性、低概率异常生长和易到达目标细胞的独特优势。实验发现,玻璃体内注射人脂肪间充质干细胞来源细胞外囊泡可显著减轻谷氨酸诱导的大鼠视网膜形态和视网膜电图损害。此外,在谷氨酸损伤前,以脂肪间充质干细胞来源细胞外囊泡干预R28细胞,可抑制细胞内钙浓度的增加,减少AMPA受体A2亚型(GluA2)的表达及磷酸化,抑制蛋白激酶C-α激活。且蛋白激酶C-α激动剂12-O-十四烷酰基激素13乙酸酯(TPA)可抑制脂肪间充质干细胞来源的细胞外囊泡对谷氨酸损伤R28细胞的保护作用。上述发现表明,脂肪间充质干细胞来源的细胞外囊泡能缓解谷氨酸诱导的视网膜兴奋性神经毒性损伤,且其作用与抑制蛋白激酶C-α激活有关。

https://orcid.org/0000-0002-9161-1055 (Ju-Fang Huang); https://orcid.org/0000-0001-6654-8114 (Tian-Qi Duan)

关键词: 脂肪间充质干细胞, 细胞外囊泡, 神经节细胞, 视网膜, R28细胞, 谷氨酸, 兴奋毒性, 视网膜电图, 钙超载, GluA2, 蛋白激酶C-α

Abstract: Adipose mesenchymal stem cells (ADSCs) have protective effects against glutamate-induced excitotoxicity, but ADSCs are limited in use for treatment of optic nerve injury. Studies have shown that the extracellular vesicles (EVs) secreted by ADSCs (ADSC-EVs) not only have the function of ADSCs, but also have unique advantages including non-immunogenicity, low probability of abnormal growth, and easy access to target cells. In the present study, we showed that intravitreal injection of ADSC-EVs substantially reduced glutamate-induced damage to retinal morphology and electroretinography. In addition, R28 cell pretreatment with ADSC-EVs before injury inhibited glutamate-induced overload of intracellular calcium, downregulation of α-amino-3-hydroxy-5-methyl-4-isoxazoleproprionic acid receptor (AMPAR) subunit GluA2, and phosphorylation of GluA2 and protein kinase C alpha in vitro. A protein kinase C alpha agonist, 12-O-tetradecanoylphorbol 13-acetate, inhibited the neuroprotective effects of ADSC-EVs on glutamate-induced R28 cells. These findings suggest that ADSC-EVs ameliorate glutamate-induced excitotoxicity in the retina through inhibiting protein kinase C alpha activation. 

Key words: adipose mesenchymal stem cells, calcium overload, electroretinography, excitotoxicity, extracellular vesicles, GluA2, glutamate, protein kinase C alpha, R28 cells, retina, retinal ganglion cell