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相关概念视频

Formation of Muscle Fibers from Myoblasts01:13

Formation of Muscle Fibers from Myoblasts

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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...
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Master Transcription Regulators02:23

Master Transcription Regulators

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Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
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Forced Transdifferentiation01:28

Forced Transdifferentiation

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Transdifferentiation, also known as lineage reprogramming, was first discovered by Selman and Kafatos in 1974 in silkmoths. They observed that the moths’ cuticle-producing cells transformed into salt-producing cells. Many such cases of natural transdifferentiation occur in organisms. In humans, pancreatic alpha cells can become beta cells. In newts, the loss of the eye’s lens causes the pigmented epithelial cells to transdifferentiate into the lens cells.
Artificial...
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Cellular Differentiation00:57

Cellular Differentiation

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How does a complex organism such as a human develop from a single cell? It all starts from a single fertilized egg which gives rise to a vast array of cell types, such as nerve cells, muscle cells, and epithelial cells that characterize the adult? Throughout development and adulthood, cellular differentiation leads cells to assume their final morphology and physiology. Differentiation is the process by which unspecialized cells become specialized to carry out distinct functions.
A zygote is a...
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Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

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Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
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Animal Mitochondrial Genetics

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Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
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相关实验视频

Updated: Jun 21, 2025

Isolation and Differentiation of Primary Myoblasts from Mouse Skeletal Muscle Explants
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差异化激活了线粒体OPA1在肌细胞细胞系中的处理.

Harpreet Kaur1, Omar Carrillo1, Iraselia Garcia2

  • 1School of Integrative Biological & Chemical Sciences, The University of Texas Rio Grande Valley, United States.

Mitochondrion
|July 10, 2024
PubMed
概括

线粒体OPA1处理在线粒体应激调节的肌细胞分化过程中对膜潜在损失变得敏感. 这一过程影响了亡和分化.

关键词:
不同化的差异化线粒体中的线粒体.一个OMA1一个OMA1一个OMA1在OPA1中,OPA1是OPA1.超膜潜在的潜力

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科学领域:

  • 线粒体生物学 线粒体生物学
  • 细胞应激反应的细胞应激反应
  • 发育生物学是发展生物学.

背景情况:

  • 线粒体光学缩-1 (OPA1) 调节线粒体的结构和功能.
  • OPA1处理与内膜潜力 (Δψm) 和细胞应激有关.
  • 在Δψm损失时,OPA1通常会被切割成不活跃的形式,但此前发现在不分化的H9c2细胞中不敏感.

研究的目的:

  • 研究神经细胞中OPA1处理的发育调节.
  • 确定控制OPA1对差异化过程中的Δψm损失的敏感性的机制.
  • 探索OPA1在肌细胞分化和亡中的作用.

主要方法:

  • 使用了H9c2心肌细胞,L6.C11和C2C12肌细胞细胞系.
  • 使用低血清介质诱导差异化.
  • 给药的碳化化化水 (CCCP) 破坏 Δψm 和化 (CAP) 抑制线粒体蛋白质合成.
  • 进行了OPA1的敲击实验.

主要成果:

  • 在分化时,OPA1处理变得对Δψm损失敏感,独立于ATRA.
  • 甲 (CAP) 预处理模拟了差异化诱导的OPA1处理灵敏度.
  • 这种调节在多个肌细胞细胞系中观察到,这表明了一个一般的机制.
  • 恢复的OPA1处理与增加的亡敏感性相关.
  • OPA1对于有效的肌肉细胞分化至关重要.

结论:

  • 一个新的发育机制调节了OMA1介导的OPA1在肌细胞中的处理.
  • 髓核细胞分化涉及线粒体应激感应途径,改变了OPA1处理.
  • 在平衡线粒体完整性,分化和亡方面,OPA1的处理动态至关重要.