激活转录因子3在高体应激诱导的人类角膜上皮细胞损伤中的作用
1Department of Ophthalmology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China; and.
Cornea
|August 13, 2025
概括
激活转录因子3 (ATF3) 通过通过核丰富丰富转录1 (NEAT1) 增加收费类受体4 (TLR4) 来加剧角膜细胞中超性应激损伤. 降低ATF3可以防止干眼疾病的进展.
科学领域:
- 眼科医生 眼科 眼科
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 干眼病 (DED) 导致眼睛表面炎症和角膜上皮细胞损伤.
- 超透性压力 (HS) 是导致DED病变的一个关键因素.
- 识别HS引起的损伤背后的分子机制对于DED治疗至关重要.
研究的目的:
- 为了研究激活转录因子3 (ATF3) 在人角膜上皮 (HCE) 细胞的高位压力 (HS) 引起的损伤中的作用.
- 探索涉及ATF3,LncRNA NEAT1,HuR和TLR4在HS诱导的HCE细胞损伤中的分子途径.
- 为了确定DED的潜在治疗点.
主要方法:
- HCE 细胞经受过高透条件 (312 和 500 mOsM) 随着或没有 ATF3 敲击.
- 使用qRT-PCR和西欧斑块测量ATF3,NEAT1,HuR和TLR4的表达水平.
- 评估了细胞活力,细胞亡,氧化应激 (ROS) 和炎症标志物 (LDH,TNF-α,IL-1β,IL-6).
- 研究了ATF3,NEAT1和HuR与TLR4相互作用的机制.
主要成果:
- 超的压力诱导了显著的角膜上皮细胞损伤,包括亡和炎症,并上调ATF3表达.
- 降低ATF3显著缓解HS诱导的HCE细胞损伤.
- 发现ATF3促进了NEAT1的表达,这反过来又通过与HuR相互作用来增强TLR4mRNA的稳定性.
- 过度表达NEAT1或TLR4部分扭转了ATF3敲击的保护作用.
结论:
- ATF3在促进人角膜上皮细胞在高度压力诱导的损伤方面发挥着关键作用.
- 该机制涉及ATF3上调NEAT1,这稳定了TLR4mRNA,导致TLR4表达的增加和随后的细胞损伤.
- 针对ATF3/NEAT1/TLR4通路可能为干眼疾病提供一种新的治疗策略.
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