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相关概念视频

Sex-linked Disorders01:43

Sex-linked Disorders

Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
Cytoskeletal Linker Proteins - Plakins01:09

Cytoskeletal Linker Proteins - Plakins

Plakins are large proteins with binding domains for microtubules, microfilaments, intermediate filaments, and membrane-associated protein complexes at cell junctions. Plakin functions are evolutionarily conserved and are primarily involved in organizing the different components of the cytoskeleton by crosslinking them to each other and connecting them to the cell-matrix and cell adhesion complexes. They are also known to interact with signal transducers, serve as scaffolds for signaling...
Satellite Stem Cells and Muscular Dystrophy01:21

Satellite Stem Cells and Muscular Dystrophy

Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...
Proteoglycans01:05

Proteoglycans

Glycans, a class of complex heterogeneous molecules, can be covalently attached to proteins to form glycosylated proteins that regulate various physiological and pathological processes. Glycosylated proteins or glycoproteins comprise N-linked and O-linked oligosaccharides. O-glycosylation is the most common type of protein glycosylation. Here, glycans attach to the oxygen atom of the hydroxyl groups of Serine or Threonine residues. O-linked glycosylation occurs later in protein processing,...
Desmosomes01:05

Desmosomes

The term desmosome derives from the Greek words "desmo" and "soma" meaning "adhesion bodies." This structure was first observed during the late 1800s and described as small, dense nodules in the epidermis. Desmosomes are button-like structures that help form an interlinked network of intermediate filaments across the cells. These junctions are  essential to hold cells together under mechanical stress and to maintain tissue integrity. Desmosomes are multi-protein complexes comprising desmosomal...
Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...

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相关实验视频

Updated: Jul 9, 2026

Modeling Myotonic Dystrophy 1 in C2C12 Myoblast Cells
09:39

Modeling Myotonic Dystrophy 1 in C2C12 Myoblast Cells

Published on: July 29, 2016

在先天性肌肉发育不良症中,双糖-连接物相互作用的翻译后破坏.

Daniel E Michele1, Rita Barresi, Motoi Kanagawa

  • 1Howard Hughes Medical Institute, Department of Physiology and Biophysics, University of Iowa, Iowa City, Iowa 52242-1101, USA.

Nature
|July 26, 2002
PubMed
概括

肌肉眼脑病 (MEB) 和福山先天性肌肉发育不良 (FCMD) 涉及由于缺陷的α-dystroglycan糖化而导致的异常大脑发育. 这种干扰会损害蛋白质结合,导致肌肉缩和患者和myd小鼠的大脑异常.

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07:44

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Last Updated: Jul 9, 2026

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09:39

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Published on: July 29, 2016

Cell Membrane Repair Assay Using a Two-photon Laser Microscope
06:35

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科学领域:

  • 生物化学 生物化学
  • 神经科学是一个神经科学.
  • 遗传学 是一个遗传学.

背景情况:

  • 肌肉眼脑病 (MEB) 和福山先天性肌肉发育不良 (FCMD) 是先天性肌肉发育不良,其特点是类似的脑形.
  • 负责的基因,POMGnT1 (MEB) 和 fukutin (FCMD),是同源的糖系转移酶,表明在蛋白质修饰中的作用.

研究的目的:

  • 研究MEB和FCMD突变对alpha-dystroglycan的功能影响.
  • 阐明这些疾病中肌肉衰竭和大脑异常背后的致病机制.

主要方法:

  • 对MEB和FCMD患者的α-dystroglycan糖化和结合活性进行分析.
  • 使用肌衰竭 (myd) 鼠标模型来研究体内效应.
  • 在myd小鼠中枢神经系统中检查神经元迁移和基底膜完整性.

主要成果:

  • 在MEB和FCMD患者中,alpha-dystroglycan的低糖化取消了它与拉米林,神经素和农林等配体的结合.
  • 这种低糖化和功能障碍在myd小鼠的肌肉和大脑中复制.
  • Myd小鼠表现出异常的神经元迁移和基底膜破坏,表明dystroglycan在大脑发育和蛋白质向中的作用.

结论:

  • 至少有三种哺乳动物基因在翻译后的途径上融合在一起,用于二糖生物合成.
  • 异常的双糖-连接物相互作用是肌肉发育不良与大脑异常的病原体的核心.
  • 迪斯特洛甘在通过细胞外基质相互作用将蛋白质向大脑中的功能部位方面发挥着关键作用.