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相关概念视频

Transcytosis of IgG01:15

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Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the  phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and...
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GPI-anchoring is a post-translational, reversible protein modification that is ubiquitous in eukaryotes. Such proteins are primarily present on the exoplasmic leaflet of the plasma membrane.
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Immunocytochemistry (ICC) and immunohistochemistry (IHC) are techniques that use antibodies to check for specific proteins or antigens in a sample. The technique was first published by Albert Coons in 1941 to detect the presence of pneumococcal antigen in tissue sections from mice infected with Pneumococcus. Immunocytochemistry helps localization of proteins or antigens in individual cells like blood cells, stem cells, etc., while immunohistochemistry does the same for tissue samples.
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相关实验视频

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从何而来,为什么IGE?

Rifat S Rahman1, Duane R Wesemann2,3,4

  • 1Department of Internal Medicine, Columbia University Irving Medical Center, New York, New York, USA.

Immunological reviews
|July 23, 2024
PubMed
概括
此摘要是机器生成的。

免疫球蛋白E (IgE) 是哺乳动物特有的,并且受到严格监管. 它从抗原无敏化到抗原敏感化的进化路径可能解释了其有限的产量和在过敏中的作用.

关键词:
在 IgE 中,IgE 是在IgG IgG的基础上.过敏原免疫疗法 免疫疗法过敏是一种过敏.类开关重组组合类开关重组血细胞是血细胞的组成部分.

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科学领域:

  • 免疫学 免疫学 免疫学
  • 进化生物学 进化生物学
  • 哺乳动物生理学哺乳动物生理学

背景情况:

  • 免疫球蛋白E (IgE) 是一种独特的抗体同型,只在哺乳动物中发现,与大多数脊椎动物中存在的其他免疫球蛋白 (Ig) 类不同.
  • 尽管IgE在触发过敏反应方面发挥着关键作用,但与其他Ig重链 (IgH) 同型相比,IgE表达非常受限制,其半衰期短,血细胞数量短暂.
  • IgE的进化起源和调节机制在很大程度上仍然是神秘的.

研究的目的:

  • 探索哺乳动物IgE进化过程中的出现.
  • 了解IgE生产的监管约束及其独特功能.
  • 调查IgE进化史与过敏性疾病之间的潜在联系.

主要方法:

  • 在脊椎动物和哺乳动物之间对Ig同型表达的比较分析.
  • 对IgE调节,半衰期和血细胞寿命的现有文献的综述.
  • 假设基于祖先抗体功能的进化途径.

主要成果:

  • 独特的IgE在哺乳动物中的存在表明了其特殊的进化轨迹.
  • 限制性产生,短半衰期和短暂的血细胞是IgE的特征.
  • IgE的产生是由IgG记忆B细胞维持的,具有异常长寿血细胞的产生潜力.
  • 从抗原无敏化转向敏感化的进化转变需要严格的IgE生产限制.

结论:

  • IgE的哺乳动物特异性与其从古代抗体系统的进化衍生有关.
  • 严格调节IgE生产是其在抗原敏感化中的特殊作用的可能适应.
  • 对IgE产生不充分的调节可能是过敏性疾病发展的基础.