PBN (Phenyl-N-Tert-Butylnitrone)-Derivatives Are Effective in Slowing the Visual Cycle and Rhodopsin Regeneration and in Protecting the Retina from Light-Induced Damage
作者:Megan Stiles、Gennadiy P. Moiseyev、Madeline L. Budda、Annette Linens、Richard S. Brush、Hui Qi、Gary L. White、Roman F. Wolf、Jian-xing Ma、Robert Floyd、Robert E. Anderson、Nawajes A. Mandal
DOI:10.1371/journal.pone.0145305
日期:——
the visual cycle by 60% and by 30%, respectively. We have identified a group of PBN related nitrones that can reach the target tissue (RPE) by systemic and topical application and slow the rate of rhodopsin regeneration and therefore the visual cycle in mouse and baboon eyes. PBNDs can also protect the rat retina from light damage. There is potential in developing these compounds as preventative therapeutics
在受Stargardt病,年龄相关性黄斑变性(AMD)和其他视网膜变性影响的眼睛的视网膜色素上皮(RPE)细胞中,A2E和相关的毒性分子是脂褐素的一部分。一种用于治疗此类变性的新颖治疗方法涉及减慢视觉周期,这可能会减少RPE中的A2E数量。这可以通过抑制RPE65来实现,RPE65可从全反式视黄酯中产生11-顺式视黄醇。我们最近显示,苯基-N-叔丁基硝酮(PBN)抑制RPE细胞中的RPE65酶活性。在这项研究中,我们表明像PBN一样,某些PBN衍生物(PBND)如4-F-PBN,4-CF3-PBN,3,4-di-F-PBN和4-CH3-PBN可以抑制RPE65和牛RPE微粒体体外试验中11-顺-视黄醇的合成 我们进一步证明,这些PBND的全身性(腹膜内,IP)给药可保护大鼠视网膜免受光损伤。视网膜电图(ERG)和组织学分析表明,与用媒介物/对照注射治疗的大鼠相比,用PBND治疗的大鼠保留了