中国神经再生研究(英文版) ›› 2024, Vol. 19 ›› Issue (7): 1608-1617.doi: 10.4103/1673-5374.386490

• 原著:视神经损伤修复保护与再生 • 上一篇    下一篇

Homer1a抑制视网膜缺血再灌注损伤后的炎症反应

  

  • 出版日期:2024-07-15 发布日期:2023-11-28
  • 基金资助:
    中央军委后勤保障部卫生局青年培育项目(21QNPY072),陕西省自然科学基础研究计划重点项目(2023-JC-ZD-48)

Homer1a reduces inflammatory response after retinal ischemia/reperfusion injury

Yanan Dou1, #, Xiaowei Fei1, #, Xin He1, #, Yu Huan1, Jialiang Wei1, Xiuquan Wu1, Weihao Lyu1, Zhou Fei1, *, Xia Li1, *, Fei Fei2, *   

  1. 1Department of Neurosurgery, Xijing Hospital, Air Force Military Medical University, Xi’an, Shaanxi Province, China; 2Department of Ophthalmology, Xijing Hospital, Air Force Military Medical University, Xi’an, Shaanxi Province, China
  • Online:2024-07-15 Published:2023-11-28
  • Contact: Fei Fei, PhD, feeplus@163.com; Xia Li, PhD, lixia_fmmu@163.com; Zhou Fei, PhD, feizhou@fmmu.edu.cn.
  • Supported by:
    This study was supported by the Youth Development Project of Air Force Military Medical University, No. 21QNPY072; Key Project of Shaanxi Provincial Natural Science Basic Research Program, No. 2023-JC-ZD-48 (both to FF).

摘要:

眼内压升高是视网膜缺血再灌注损伤的主要原因之一,可导致NLRP3炎症小体的激活,严重情况下可导致视觉受损。据报道,Homer1a能在大脑神经炎症中起保护作用。然而,Homer1a是否也对眼内压升高所致视网膜缺血再灌注损伤中的NLRP3炎症小体发挥影响尚不清楚。实验以C57BL/6J和Homer1flox/-/Homer1a+/-Nestin-Cre+/-小鼠构建了由眼内压升高诱导的视网膜缺血再灌注损伤模型,同时在体外以Müller细胞构建了氧糖剥夺再灌注损伤模型。结果发现,Homer1a过表达可抑制缺血再灌注损伤后视网膜厚度变小和Müller细胞活性的降低。此外,敲低Homer1a可通过Caspase-8促进NF-κB-P65的激活、NF-κB P65的核转位、NLRP3炎症小体的形成以及白细胞介素1β和白细胞介素18的产生和加工,而Homer1a过表达则获得了相反的结果。最后发现,Homer1a和JSH-23联合治疗可显著缓解缺血再灌注损伤后Homer1flox/-/Homer1a+/-Nestin-Cre+/-小鼠视网膜厚度的减少和Müller细胞的凋亡。上述结果表明,Homer1a可在缺血再灌注损伤后通过Caspase-8/NF-κB P65/NLRP3通路对视网膜组织和Müller细胞发挥保护作用。

https://orcid.org/0000-0001-6194-5663 (Fei Fei); https://orcid.org/0000-0003-2679-9917 (Xia Li); https://orcid.org/0000-0003-3276-6345 (Zhou Fei)

关键词: 视网膜, 缺血再灌注损伤, 眼内压, Müller细胞, Homer1a, 核因子kB p65, NLRP3, Caspase-8, 白细胞介素1β, 白细胞介素18, JSH-23

Abstract: Elevated intraocular pressure (IOP) is one of the causes of retinal ischemia/reperfusion injury, which results in NLRP3 inflammasome activation and leads to visual damage. Homer1a is reported to play a protective role in neuroinflammation in the cerebrum. However, the effects of Homer1a on NLRP3 inflammasomes in retinal ischemia/reperfusion injury caused by elevated IOP remain unknown. In our study, animal models were constructed using C57BL/6J and Homer1flox/–/Homer1a+/–/Nestin-Cre+/– mice with elevated IOP-induced retinal ischemia/reperfusion injury. For in vitro experiments, the oxygen-glucose deprivation/reperfusion injury model was constructed with Müller cells. We found that Homer1a overexpression ameliorated the decreases in retinal thickness and Müller cell viability after ischemia/reperfusion injury. Furthermore, Homer1a knockdown promoted NF-κB P65Ser536 activation via caspase-8, NF-κB P65 nuclear translocation, NLRP3 inflammasome formation, and the production and processing of interleukin-1β and interleukin-18. The opposite results were observed with Homer1a overexpression. Finally, the combined administration of Homer1a protein and JSH-23 significantly inhibited the reduction in retinal thickness in Homer1flox/–/Homer1a+/–/Nestin-Cre+/– mice and apoptosis in Müller cells after ischemia/reperfusion injury. Taken together, these studies demonstrate that Homer1a exerts protective effects on retinal tissue and Müller cells via the caspase-8/NF-κB P65/NLRP3 pathway after I/R injury.

Key words: caspase-8, Homer1a, interleukin-18, interleukin-1β, intraocular pressure, ischemia/reperfusion injury, JSH-23, Müller cells, NLRP3, nuclear factor-kB p65, retina