Yang Bo, Yang Kunhuan, Xi Ruitong, Li Shiying, Chen Jingmeng, Wu Yalin
Department of Ophthalmology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China; Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Fujian Engineering and Research Center of Eye Regenerative Medicine, Eye Institute of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China.
Department of Ophthalmology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China.
Redox Biol. 2025 Jun 6;85:103716. doi: 10.1016/j.redox.2025.103716.
Dry age-related macular degeneration (AMD) is one of the common blinding eye diseases, with pathological hallmarks of lipofuscin accumulation, neuroretina atrophy and retinal pigment epithelium (RPE) degeneration. Currently, there are no effective interventions for dry AMD. Although there is already evidence suggesting a link between cellular senescence and age-related diseases, it is still unclear whether long-term senolytic therapy with Dasatinib and Quercetin (D + Q) can slow the progression of dry AMD and ultimately prevent retinal structural damage and function loss. Mice lacking the Abca4 and Rdh8 genes (Abca4Rdh8 mice) are a preclinical model of dry AMD. In this study, we performed a 4-month senolytic therapy with D + Q on 4-month-old Abca4Rdh8 mice. Abca4Rdh8 mice at the age of 8 months showed obvious retinal degeneration, along with RPE senescence, lysosomal alkalinization, lipofuscin accumulation and oxidative stress. Importantly, the long-term D + Q regimen significantly alleviated the degeneration of retinal structures and function in 8-month-old Abca4Rdh8 mice, and it effectively repressed cellular senescence, lysosomal alkalinization, lipofuscin accumulation and oxidative stress in the RPE. This study is the first to demonstrate the effect of long-term intervention with senolytics D + Q on dry AMD. Overall, these findings highlight the potential of long-term senolytic treatment as an intervention for dry AMD.
干性年龄相关性黄斑变性(AMD)是常见的致盲眼病之一,其病理特征为脂褐素积累、神经视网膜萎缩和视网膜色素上皮(RPE)变性。目前,干性AMD尚无有效的干预措施。尽管已有证据表明细胞衰老与年龄相关疾病之间存在联系,但长期使用达沙替尼和槲皮素(D + Q)进行衰老细胞溶解疗法是否能减缓干性AMD的进展并最终防止视网膜结构损伤和功能丧失仍不清楚。缺乏Abca4和Rdh8基因的小鼠(Abca4Rdh8小鼠)是干性AMD的临床前模型。在本研究中,我们对4个月大的Abca4Rdh8小鼠进行了为期4个月的D + Q衰老细胞溶解疗法。8个月大的Abca4Rdh8小鼠出现明显的视网膜变性,伴有RPE衰老、溶酶体碱化、脂褐素积累和氧化应激。重要的是,长期的D + Q治疗方案显著减轻了8个月大的Abca4Rdh8小鼠视网膜结构和功能的退化,并有效抑制了RPE中的细胞衰老、溶酶体碱化、脂褐素积累和氧化应激。本研究首次证明了衰老细胞溶解剂D + Q长期干预对干性AMD的作用。总体而言,这些发现突出了长期衰老细胞溶解治疗作为干性AMD干预措施的潜力。