与氧化压力相关的眼撕裂MDA和GPX3的增加,而NRF2-抗氧化功能在树皮细胞中下降
Madhuri A Koduri1, Mackenzie Charter1, Rohini Sonar2
1Department of Ophthalmology, NYU Grossman School of Medicine, Science Building, Fifth Floor 435 E 30th, New York, NY, USA.
bioRxiv : the preprint server for biology
|November 26, 2025
概括
角质 (KC) 与氧化应激有关,眼含量增加的马隆迪甲基 (MDA) 和氨酸过氧化酶3 (GPX3) 表明疾病的严重程度. NRF2通路调节显示出恢复角膜健康的潜力.
科学领域:
- 眼科医生 眼科 眼科
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 角膜 (KC) 是一种退行性角膜疾病,缺乏早期诊断生物标志物和治愈治疗方法.
- 了解KC的潜在生物学,特别是氧化应激的作用,对于治疗的发展至关重要.
研究的目的:
- 为了研究未解决的氧化应激在角病原发生中的作用.
- 为了确定早期KC诊断和严重程度预测的潜在生物标志物.
- 探索针对氧化应激路径的治疗策略.
主要方法:
- 在KC患者和对照组中测量了撕裂马隆迪阿尔海德 (MDA) 和谷氨酸过氧化酶3 (GPX3) 水平.
- 与最大角质量测量 (Kmax) 相关的生物标志物水平作为KC严重性的衡量标准.
- 利用细胞培养模型评估对角膜层细胞和NRF2通路活性的氧化应激影响.
- 研究了NRF2抑制和硫福拉 (NRF2增强剂) 治疗对细胞表型和基因表达的影响.
主要成果:
- 眼MDA和GPX3在KC患者中显著升高,与Kmax正相关.
- 在氧化应激下,KC角膜 stromal 细胞表现出增加的亡和受损的NRF2激活.
- 抑制NRF2诱导了类似于KC的细胞表型,而硫福拉恢复了抗氧化基因表达和原沉积.
结论:
- 细胞抗氧化剂信号的失调与角质有关.
- 升高的眼MDA和GPX3显示为KC诊断和严重程度的生物标志物具有前途.
- 硫福拉治疗显示了对KC细胞表型的潜在恢复作用.
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