镜片囊的高级糖化终产品诱导上皮细胞的衰老:对二次白内障的影响
Grace Cooksley1, Mi-Hyun Nam1, Rooban B Nahomi1
1Department of Ophthalmology, School of Medicine, University of Colorado, Aurora, Colorado, USA.
Aging cell
|October 9, 2024
概括
透镜囊中的高级糖化终产物 (AGEs) 在透镜上皮细胞 (LECs) 中诱导细胞衰老,这是白内障手术后后囊变暗 (PCO) 的关键驱动因素.
科学领域:
- 眼科医生 眼科 眼科
- 细胞生物学 细胞生物学
- 衰老研究研究 衰老研究
背景情况:
- 后囊模糊化 (PCO) 是白内障手术后的一个常见并发症.
- 镜片上皮细胞 (LECs) 转化为肌纤维细胞类细胞,合成多余的细胞外基质并导致PCO中的纤维化.
- 与衰老相关的细胞衰老与各种纤维状况有关.
研究的目的:
- 为了调查后方透镜囊中老化的LEC的存在.
- 为了确定镜片囊中的高级糖化终产物 (AGEs) 是否可以诱导LEC衰老并导致PCO.
主要方法:
- 从尸体眼中的老年人透镜囊中分析衰老的LEC.
- 在体外培养年轻和老年镜片囊上的人类LEC,以及在AGE修饰的细胞外基质 (ECM-AGEs) 上.
- 评估衰老标志物,反应性氧物种 (ROS) 水平和纤维化标志物,以后治疗RAGE抗剂和ROS抑制剂.
主要成果:
- 陈旧的镜片囊含有老化的LEC.
- 在老化囊或ECM-AGEs上培养的LEC显示出老化标志物和ROS水平的增加,以AGE度依赖的方式.
- RAGE 抗剂和 ROS 抑制剂降低了衰老和纤维化标志物,而来自治疗细胞的条件介质在天真的 LEC 中诱导了纤维化.
结论:
- 在透镜囊内的AGE促进LEC衰老.
- 衰老的LECs在邻近细胞中触发了介酶过渡,加剧了PCO.
- 针对AGE,RAGE或ROS可能为预防PCO提供治疗策略.
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