肌肉线粒酶通过系统抑制胰岛素信号传递促进长寿
Edward Owusu-Ansah1, Wei Song, Norbert Perrimon
1Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.
Cell
|November 19, 2013
概括
在Drosophila中轻度肌肉线粒体损伤通过激活补偿性应激反应来保持功能并延长寿命. 这涉及线粒体展开蛋白反应 (UPR) 和类似胰岛素的增长因子结合蛋白7,表明对衰老和代谢疾病的潜在治疗点.
科学领域:
- 细胞生物学 细胞生物学
- 衰老研究研究 衰老研究
- 代谢信号传递 代谢信号传递
背景情况:
- 线粒体功能障碍是衰老的标志,有助于与年龄相关的肌肉功能下降.
- 了解身体对线粒体压力的适应性反应对于开发抗衰老和疾病的干预措施至关重要.
研究的目的:
- 在Drosophila模型中研究肌肉线粒体损伤激活的补偿信号通路.
- 为了确定轻微的线粒体压力是否可以对肌肉健康和寿命产生有益影响.
主要方法:
- 利用Drosophila模型诱导和研究肌肉线粒体损伤.
- 分析了与应激反应途径相关的基因表达,包括线粒体展开蛋白质反应 (UPR(mt)).
- 研究了胰岛素类生长因子结合蛋白7在调节全身效应中的作用.
主要成果:
- 轻微的肌肉线粒体应急保护了线粒体功能,并延迟了与年龄相关的肌肉恶化.
- 轻度线粒体损伤的的寿命显著延长.
- 确定了两个关键的延长寿命信号模块:依赖于氧化还原的UPR (mt) 激活和诱导类似胰岛素的生长因子结合蛋白7,该蛋白质对抗胰岛素信号并促进线粒.
结论:
- 轻微的肌肉线粒体损伤可以触发适应性应激反应,促进长寿和保持肌肉健康.
- 这些发现表明,涉及UPR (mt) 和IGFBP7的保存机制可能是针对老化和代谢障碍的治疗益处的目标.
- 这项研究为探索人类对线粒体应激反应的IGFBP分泌开辟了道路,这对与胰岛素信号相关的疾病有影响.
更多相关视频
08:12Author Spotlight: Unveiling Mitochondrial Function and Cellular Metabolic Adaptation in Metabolic Diseases
Published on: October 4, 2024
2.1K
12:59Improving Strength, Power, Muscle Aerobic Capacity, and Glucose Tolerance through Short-term Progressive Strength Training Among Elderly People
Published on: July 5, 2017
12.0K
相关概念视频
Mitochondria
13.5K
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,...
13.5K
mTOR Signaling and Cancer Progression
3.6K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
3.6K
PI3K/mTOR/AKT Signaling Pathway
5.2K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
5.2K
Regulation of Metabolism
9.1K
Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
9.1K
Formation of Muscle Fibers from Myoblasts
5.9K
De novo myogenesis, or the formation of muscle fibers, begins during the early embryonic stages. The skeletal muscle is formed from somites– blocks of embryonic cell layers. The somites are further divided into dermatomes, myotomes, sclerotomes, and syndetomes. Among these, the myotomes give rise to muscle fibers.
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
5.9K
Cellular Adaptation II: Hypertrophy
78
Hypertrophy is the increase in the size of individual cells, resulting in the enlargement of a tissue or organ. Unlike hyperplasia, which involves an increase in cell number, hypertrophy is characterized by an increase in cell volume. This process often occurs in response to higher functional demand or hormonal stimulation, leading to the production of more structural proteins and organelles, thereby enhancing the cells' work capacity.There are two primary types of hypertrophy:...
78
