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相关概念视频

Mitochondria01:37

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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,...
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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,...
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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.
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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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相关实验视频

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Measuring Mitochondrial Function of Naïve and Effector CD8 T Cells
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在老化过程中,STAT3调节了CD4+ T线粒体的动态和功能.

Emelia Zukowski1, Marco Sannella1, Jack Donato Rockhold1

  • 1Department of Nutrition and Public Health, Merrimack College, North Andover, Massachusetts, USA.

Aging cell
|October 14, 2023
PubMed
概括
此摘要是机器生成的。

衰老会增加T细胞中的线粒体STAT3,损害功能和细胞因子的产生. 抑制这种线粒体STAT3 (mitoSTAT3) 恢复线粒体动力学并减少炎症,揭示了一个关键的衰老机制.

关键词:
CD4+ T 细胞是 CD4+ T 细胞.Th17 细胞因子是什么老化的老化 衰老的老化细胞因子 细胞因子炎症导致的炎症.线粒体中的线粒体.线粒体中的STAT3原始的CD4+T细胞.

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科学领域:

  • 免疫学 免疫学 免疫学
  • 细胞衰老 细胞衰老
  • 线粒体生物学 线粒体生物学

背景情况:

  • 随着年龄的增长,T细胞效应因子的功能下降.
  • 衰老与T细胞的细胞内变化有关.
  • 线粒体功能障碍与T细胞衰老有关.

研究的目的:

  • 研究STAT3局部化在老化T细胞中的作用.
  • 阐明线粒体STAT3 (mitoSTAT3) 对T细胞功能的影响.
  • 探索针对 mitoSTAT3.3 的治疗策略.

主要方法:

  • 评估了来自年轻人和老年人的T细胞中的STAT3局部化.
  • 使用一种针对线粒体的STAT3抑制剂 (Mtcur-1).
  • 分析了线粒体的动态,功能和细胞因子的产生.
  • 在年轻成年人的T细胞中表达了构成性活跃的STAT3.

主要成果:

  • 衰老会增加STAT3的局部化到线粒体 (mitoSTAT3).
  • 线粒体STAT3增强线粒体复合II活动,改变动态和功能.
  • 用Mtcur-1抑制线粒体3可以逆转年龄引起的线粒体变化,并减少Th17炎症.
  • 年轻T细胞中的构成性STAT3激活模仿了与衰老相关的线粒体和细胞因子概况.

结论:

  • mitoSTAT3是与年龄相关的T细胞功能障碍的关键调解者.
  • 准 mitoSTAT3 可以恢复线粒体功能和T细胞平衡.
  • 这项研究揭示了一种新的机制,它将线粒体动力学,STAT3和T细胞衰老联系在一起.