相关实验视频

Updated: Jun 23, 2025

Measurement of Mitochondrial Oxygen Consumption in Permeabilized Fibers of Drosophila Using Minimal Amounts of Tissue

Measurement of Mitochondrial Oxygen Consumption in Permeabilized Fibers of Drosophila Using Minimal Amounts of Tissue

Published on: April 7, 2018

操纵线粒体的pyruvate载体功能会导致角膜肌纤维细胞的代谢重塑,从而改善纤维化

Kye-Im Jeon¹, Ankita Kumar¹, Paul S Brookes²

¹Dept. Ophthalmology, Flaum Eye Institute and Center for Visual Science, University of Rochester, Rochester, NY, USA.

|June 18, 2024

概括

在角膜纤维化中,抑制线粒体的酸盐载体 (MPC) 破坏了对肌纤维细胞持久性和原蛋白生产至关重要的代谢途径,为视力恢复提供了新的治疗标.

科学领域:

眼科医生眼科眼科
细胞生物学细胞生物学
代谢研究研究代谢研究

背景情况:

肌纤维细胞驱动角膜伤口愈合,但可以导致纤维化和视力丧失.
PPARγ激动剂特罗格利塔可以减少角膜纤维化,可能是通过线粒体酸盐载体 (MPC) 抑制.
在肌纤维细胞持续性和纤维化中MPC的精确代谢作用尚不清楚.

研究的目的:

研究 mitochondrial pyruvate 载体 (MPC) 在角膜纤维细胞转差和纤维化中的作用.
为了确定肌纤维细胞持久性的代谢和表观遗传依赖.
探索MPC抑制作为角膜纤维化治疗策略.

主要方法:

对角膜纤维细胞进行了生物能量,代谢和表观遗传分析.
用TGF-β1刺激细胞,诱导肌纤维细胞的转基因分化.
治疗包括托罗格利塔和MPC抑制剂UK5099.

主要成果:

代谢变化伴随着肌纤维细胞重塑,但不仅仅是驱动它.
抑制MPC有利于克雷布斯循环碳的流入,而不是proline合成,影响原体沉积.
增加的乙-CoA和基因素H3乙化表明表观遗传学强化了肌纤维细胞表型.

结论:

通过MPC持续的碳流入对于角膜纤维化中的肌纤维细胞持续性和原合成至关重要.
代谢重塑和表观遗传变化在维持肌纤维细胞表型方面相互交织在一起.
准MPC为治疗角膜纤维化和恢复视力提供了一个新的治疗脆弱性.

关键词:

视角膜视角膜是一个纤维化纤维化纤维化代谢学代谢学代谢学线粒体中的线粒体.铁酸盐是什么铁酸盐是什么

更多相关视频

Author Spotlight: Extended Oxygen Consumption Measurement in Retinal Pigment Epithelium Using Resipher

Author Spotlight: Extended Oxygen Consumption Measurement in Retinal Pigment Epithelium Using Resipher

Published on: August 16, 2024

Real-Time Analysis of Bioenergetics in Primary Human Retinal Pigment Epithelial Cells Using High-Resolution Respirometry

Real-Time Analysis of Bioenergetics in Primary Human Retinal Pigment Epithelial Cells Using High-Resolution Respirometry

Published on: February 3, 2023

相关概念视频

Pyruvate Oxidation

Pyruvate Oxidation

After glycolysis, the charged pyruvate molecules enter the mitochondria via active transport and undergo three enzymatic reactions. These reactions ensure that pyruvate can enter the next metabolic pathway so that energy stored in the pyruvate molecules can be harnessed by the cells.
First, the enzyme pyruvate dehydrogenase removes the carboxyl group from pyruvate and releases it as carbon dioxide. The stripped molecule is then oxidized and releases electrons, which are then picked up by NAD+...

Mitochondrial Membranes

Mitochondrial Membranes

A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...