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相关概念视频

Gastritis-II: Pathophysiology01:17

Gastritis-II: Pathophysiology

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Gastritis is marked by disruption of the mucosal barrier that usually protects the stomach tissue from digestive juices and manifests in acute and chronic forms.
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
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Myasthenia Gravis: Overview and Treatment01:20

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Myasthenia gravis is a neuromuscular transmission disorder characterized by weakness and increased fatigability of skeletal muscles. It is an autoimmune disease affecting approximately one in 2000 people, where antibodies against the α1 subunit of nicotinic acetylcholine receptors are produced.
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Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
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Autoimmune Disorders01:29

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Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune...
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相关实验视频

Updated: Jun 23, 2025

Antibody Transfection into Neurons as a Tool to Study Disease Pathogenesis
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在肌肉炎中病理性自身抗体内部化.

Iago Pinal-Fernandez1,2, Sandra Muñoz-Braceras3, Maria Casal-Dominguez3,2

  • 1Muscle Disease Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA andrew.mammen@nih.gov iago.pinalfernandez@nih.gov.

Annals of the rheumatic diseases
|June 20, 2024
PubMed
概括

在肌肉炎中,自身抗体进入肌肉细胞并破坏其功能,挑战了以前的假设. 这一发现对了解自身免疫性肌肉病变和开发向治疗有意义.

关键词:
抗体是一种抗体.自动抗体是一种自身抗体.皮肤肌肉菌性炎 (dermatomyositis) 是一种疾病.聚合神经炎是一种多元神经炎.

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科学领域:

  • 免疫学 免疫学 免疫学
  • 分子生物学分子生物学
  • 肌肉生物学 肌肉生物学

背景情况:

  • 针对细胞内蛋白的自身抗体在自身免疫性疾病中很普遍.
  • 这些自身抗体在肌肉炎中的作用一直受到争议,因为人们认为它们无法透到肌肉细胞.

研究的目的:

  • 为了调查自身抗体是否可以进入肌肉炎的活体肌肉细胞.
  • 为了确定内部化自身抗体是否会导致肌肉细胞的功能变化.

主要方法:

  • 同焦点免疫光显微镜用于定位肌肉活检中的抗体.
  • 669个肌肉样本 (肌肉炎,对照) 的散装RNA测序.
  • 患者抗体被电穿透到培养的肌细胞中,然后进行RNA测序.

主要成果:

  • 在肌肉纤维中发现了肌肉炎自身抗体,与其自身抗原共定位.
  • 用针对转录调节者的自身抗体进行的肌肉活检显示了转录学变化,表明了自身抗原功能障碍.
  • 具体的例子包括患有抗PM/Scl抗体的患者的改变RNA处理.
  • 在体外实验证实,患者的抗体会在肌肉细胞中诱导类似的转录基因变化.

结论:

  • 在肌肉炎中,自身抗体被内化到活体肌肉细胞中.
  • 内化自身抗体会破坏其目标自身抗原的功能,导致可观察到的生物效应.