米里卡诺尔可以通过向过氧化素5来拯救线粒体功能障碍,从而预防与衰老相关的肉症
Shengnan Shen1,2, Qiwen Liao2,3, Peng Lyu2
1State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences Beijing China.
MedComm
|June 13, 2024
概括
米里卡诺 (MY) 通过减少氧化应激和保护线粒体来对抗与年龄相关的肌肉损失. 这种天然化合物向过氧素5,为肉症提供潜在的治疗方法,并促进健康的衰老.
科学领域:
- 老年学和分子生物学
- 肌肉生理学和衰老研究研究
背景情况:
- 衰老涉及分子和细胞损伤,增加疾病风险,如肉症.
- 标志着肌肉衰竭的萨尔科佩尼亚严重影响了运动能力,生活质量,并增加了老年人的跌倒风险.
- 由于氧化损伤导致的线粒体功能障碍是与年龄相关的肌肉损失的关键因素.
研究的目的:
- 调查米瑞卡诺 (MY) 对老年肌肉衰竭的保护作用.
- 确定MY是否减轻线粒体中的氧化损伤,并确定其直接的蛋白质标和作用机制.
主要方法:
- 向老年小鼠注射米瑞卡诺 (MY),以评估其对肌肉质量和力量的影响.
- 生物物理测试以确定MY的直接蛋白质标.
- 使用C2C12神经管的实验来评估MY对活性氧物种 (ROS) 和线粒体DNA (mtDNA) 损伤的影响.
主要成果:
- 米里卡诺尔 (MY) 保护老年小鼠免受肌肉质量和力量的下降.
- MY有效地清理了反应性氧物种 (ROS),恢复了氧化还原稳定.
- 氧素5 (Prx5) 被确定为MY的直接目标.
- 通过 MY 激活 Prx5,减少了肌肉细胞中的 ROS 积累和受损的线粒体 DNA.
结论:
- 米里卡诺 (MY) 通过减轻氧化损伤和改善线粒体功能,证明了对的治疗潜力.
- 针对MY的百氧化素5 (Prx5) 提供了一种新的策略来对抗与年龄相关的肌肉衰竭.
- 这些发现有助于理解健康衰老,并为与年龄相关的疾病开发干预措施.
相关概念视频
01:37Mitochondria
12.1K
Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
12.1K
01:46Electron Transport Chain: Complex I and II
12.9K
The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
ROS generation is regulated and maintained at moderate levels necessary...
12.9K
01:45Mitochondrial Membranes
9.9K
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,...
9.9K
01:39Mitochondrial Precursor Proteins
2.6K
Mitochondrial precursors are partially unfolded or loosely folded polypeptide chains. Newly synthesized precursors are inhibited from spontaneously folding into their native conformation by the cytosolic chaperones, heat shock proteins 70 (Hsp70), and mitochondrial import stimulation factors (MSFs). Precursors bound to MSFs are guided to the TOM70-TOM37 receptors, while precursors bound to Hsp70 chaperones are targetted to TOM20-TOM22 receptor complexes.
Most of the mitochondrial...
Most of the mitochondrial...
2.6K
01:19Translocation of Proteins into the Mitochondria
3.1K
Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
3.1K
01:30Peroxisomes and Mitochondria
87.0K
Peroxisomes and mitochondria are two important oxygen-utilizing organelles in eukaryotic cells. Mitochondria carry out cellular respiration—the process that converts energy from food into ATP. Peroxisomes carry out a variety of functions, primarily breaking down different substances, such as fatty acids.
The peroxisome is a single membrane-bound cellular organelle that can perform several different functions, including lipid metabolism and chemical detoxification. The enzymes within...
The peroxisome is a single membrane-bound cellular organelle that can perform several different functions, including lipid metabolism and chemical detoxification. The enzymes within...
87.0K