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Nutrients:叶黄素和玉米黄质异构体通过降低氧化和内质网应激来防止光诱导的视网膜病变

2018-07-10 cuiguizhong MedSci原创

美国科尔眼科研究所的Yu M等近日在Nutrients发表了一篇重要的工作。氧化应激反应(OS)和内质网应激(ERS)是光感受器变性的主要因素。叶黄素、RR-玉米黄质(3R,3'R-玉米黄质)和RS(内消旋)-玉米黄质(3R,3'S-RS-玉米黄质)(L / Zi)可通过改善视网膜中的OS来防止细胞损伤。在这项研究中,他们检查了L/Zi补充剂在光感受器变性小鼠模型中的作用,并研究了使用L / Zi

美国科尔眼科研究所的Yu M等近日在Nutrients发表了一篇重要的工作。氧化应激反应(OS)和内质网应激(ERS)是光感受器变性的主要因素。叶黄素、RR-玉米黄质(3R,3'R-玉米黄质)和RS(内消旋)-玉米黄质(3R,3'S-RS-玉米黄质)(L / Zi)可通过改善视网膜中的OS来防止细胞损伤。在这项研究中,他们检查了L/Zi补充剂在光感受器变性小鼠模型中的作用,并研究了使用L / Zi治疗是否可以改善OS和ERS。

他们构建了暴露在光下的BALB / cJ小鼠动物模型。通过视网膜电图(ERG)和末端脱氧尿苷三磷酸缺口末端标记(TUNEL),分析L/ Zi的保护作用。通过蛋白质印迹实验,研究与OS和ERS有关的潜在机制。

他们发现,经过L / Zi治疗后,ERG振幅显着增高,并且TUNEL阳性细胞的数量显着降低。蛋白质印迹结果显示,随着磷酸化的c-Jun N端激酶(p-JNK)的显着下调和核受体因子红细胞2相关因子2(Nrf2)的显着上调,OS得到改善。此外,随着78kDa葡萄糖调节蛋白(GRP78)、磷酸化蛋白激酶RNA样内质网激酶(p-PERK)、激活转录因子4(ATF4)和激活转录因子(ATF6)的显着下调,ERS减少。

总之,他们的数据显示,L / Zi可以在光感受器功能和形态学方面起到保护作用,防止光损伤,这可能与其减轻氧化和内质网应力有关。

原文出处:

Yu, M., W. Yan, and C. Beight, Lutein and Zeaxanthin Isomers Protect against Light-Induced Retinopathy via Decreasing Oxidative and Endoplasmic Reticulum Stress in BALB/cJ Mice. Nutrients, 2018. 10(7).

本文系梅斯医学(MedSci)原创编译整理,转载需授权!

 

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    2018-07-12 zutt
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    2018-07-10 戒馋,懒,贪

    谢谢分享学习了

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