牛磺熊去氧胆酸通过诱导视网膜色素上皮细胞自噬赋予对氧化应激的保护作用。

Tauroursodeoxycholic Acid Confers Protection Against Oxidative Stress via Autophagy Induction in Retinal Pigment Epithelial Cells.

作者信息

Zubieta Daniella, Warden Cassandra, Bhattacharya Sujoy, Brantley Milam A

机构信息

Department of Ophthalmology and Visual Sciences, Vanderbilt Eye Institute, Vanderbilt University Medical Center, Nashville, TN 37232, USA.

出版信息

Curr Issues Mol Biol. 2025 Mar 26;47(4):224. doi: 10.3390/cimb47040224.

Abstract

Tauroursodeoxycholic acid (TUDCA) has been shown to protect against oxidative damage in retinal pigment epithelial (RPE) cells. However, the mechanisms by which it mediates these protective effects have not been thoroughly investigated in the context of age-related macular degeneration (AMD) disease onset and progression. We measured LC3-II and p62 expression via Western blot and immunohistochemistry in RPE cells treated with HO, TUDCA, or a combination of both to measure autophagy induction. To determine autophagy flux, we measured the expression of LC3-II/LC3-I in RPE cells in the presence of bafilomycin via Western blot. To determine the mechanistic pathways of TUDCA-induced autophagy, we measured the protein expression of autophagy regulators (Atg5, Beclin-1, S6, AMPK, and Akt) via Western blot. We show that TUDCA-mediated autophagy induction confers protection of RPE cells against oxidative damage via mTORC1/mTORC2 independent pathways but depends on Atg5. Our work adds to the overall understanding of RPE cell homeostasis and highlights the role of TUDCA in maintaining RPE health.

摘要

牛磺熊去氧胆酸(TUDCA)已被证明可保护视网膜色素上皮(RPE)细胞免受氧化损伤。然而,在年龄相关性黄斑变性(AMD)疾病的发生和发展过程中,其介导这些保护作用的机制尚未得到充分研究。我们通过蛋白质印迹法和免疫组织化学法测量了用HO、TUDCA或两者组合处理的RPE细胞中LC3-II和p62的表达,以检测自噬诱导情况。为了确定自噬通量,我们通过蛋白质印迹法测量了在巴弗洛霉素存在下RPE细胞中LC3-II/LC3-I的表达。为了确定TUDCA诱导自噬的机制途径,我们通过蛋白质印迹法测量了自噬调节因子(Atg5、Beclin-1、S6、AMPK和Akt)的蛋白质表达。我们发现,TUDCA介导的自噬诱导通过独立于mTORC1/mTORC2的途径赋予RPE细胞对氧化损伤的保护作用,但依赖于Atg5。我们的工作增进了对RPE细胞内稳态的整体理解,并突出了TUDCA在维持RPE健康中的作用。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索