中国神经再生研究(英文版) ›› 2021, Vol. 16 ›› Issue (6): 1121-1126.doi: 10.4103/1673-5374.300462

• 原著:视神经损伤修复保护与再生 • 上一篇    下一篇

腹腔巨噬细胞可抑制视网膜神经节细胞存活和轴突的再生

  

  • 出版日期:2021-06-15 发布日期:2020-12-31
  • 基金资助:

    国家自然科学基金项目(81570849号),广东省自然科学基金(2020A1515010415),广东省中医药发展专项基金(20202089),广东省高水平大学发展计划临床医学重点学科项目(002-18119101

Peritoneal macrophages attenuate retinal ganglion cell survival and neurite outgrowth

Jia-Jian Liang1, #, Yu-Fen Liu1, 2, #, Tsz Kin Ng1, 2, 3, Ci-Yan Xu1, Mingzhi Zhang1, Chi Pui Pang1, 3, Ling-Ping Cen1, *   

  1. 1 Joint Shantou International Eye Center of Shantou University and the Chinese University of Hong Kong, Shantou, Guangdong Province, China;  2 Shantou University Medical College, Shantou, Guangdong Province, China;  3 Department of Ophthalmology and Visual Sciences, the Chinese University of Hong Kong, Hong Kong Special Administrative Region, China
  • Online:2021-06-15 Published:2020-12-31
  • Contact: Ling-Ping Cen, PhD, cenlp@hotmail.com.
  • Supported by:
    This work was supported by the National Natural Science Foundation of China, No. 81570849 (to LPC), the Natural Science Foundation of Guangdong Province of China, No. 2020A1515010415 (to LPC), the Special Fund for Chinese Medicine Development of Guangdong Province of China, No. 20202089 (to TKN) and the Grant for Key Disciplinary Project of Clinical Medicine under the Guangdong High-Level University Development Program, No. 002-18119101.

摘要:

炎症是疾病或损伤后中枢神经系统中神经元存活的关键病理生理因素,但既往研究对巨噬细胞对神经元的作用机制尚不清楚。(1)实验将成年Fischer大鼠的视网膜与原代腹膜巨噬细胞或经酵母聚糖活化的腹膜巨噬细胞共培养7d;(2)免疫荧光分析表明,腹膜巨噬细胞可抑制视网膜外植体中的神经节细胞存活和神经突生长,并缩短再生神经突的长度。而向腹膜巨噬细胞中添加酵母聚糖,则能进一步减弱神经节细胞的存活和神经突的生长;(3)腹膜巨噬细胞培养基也可抑制神经节细胞的存活和神经突的生长,同时缩短再生神经突的长度,说明腹膜巨噬细胞的分泌物可介导腹膜巨噬细胞的抑制作用;(4)炎症和氧化相关基因表达的增加可能也与酵母聚糖激活引起的神经节细胞变性增强有关;(5)结果表明,原代腹腔巨噬细胞可减弱神经节细胞存活和神经突的再生,且其活化会进一步加剧神经节细胞的变性。实验于2014年3月11日经汕头大学汕头国际眼科中心和中国大学联合动物伦理委员会批准,批准号:EC 20140311(2)-P01。

https://orcid.org/0000-0003-3876-0606 (Ling-Ping Cen)

关键词: 视神经, 巨噬细胞, 模型, 体外, 视网膜神经节细胞, 存活, 神经突, 再生, 炎症

Abstract: Inflammation is a critical pathophysiological process that modulates neuronal survival in the central nervous system after disease or injury. However, the effects and mechanisms of macrophage activation on neuronal survival remain unclear. In the present study, we co-cultured adult Fischer rat retinas with primary peritoneal macrophages or zymosan-treated peritoneal macrophages for 7 days. Immunofluorescence analysis revealed that peritoneal macrophages reduced retinal ganglion cell survival and neurite outgrowth in the retinal explant compared with the control group. The addition of zymosan to peritoneal macrophages attenuated the survival and neurite outgrowth of retinal ganglion cells. Conditioned media from peritoneal macrophages also reduced retinal ganglion cell survival and neurite outgrowth. This result suggests that secretions from peritoneal macrophages mediate the inhibitory effects of these macrophages. In addition, increased inflammation- and oxidation-related gene expression may be related to the enhanced retinal ganglion cell degeneration caused by zymosan activation. In summary, this study revealed that primary rat peritoneal macrophages attenuated retinal ganglion cell survival and neurite outgrowth, and that macrophage activation further aggravated retinal ganglion cell degeneration. This study was approved by the Animal Ethics Committee of the Joint Shantou International Eye Center of Shantou University and the Chinese University of Hong Kong, Shantou, Guangdong Province, China, on March 11, 2014 (approval no. EC20140311(2)-P01).

Key words: in vitro, inflammation, macrophages, model, neurite outgrowth, optic nerve, retinal ganglion cells, survival