概括
在小鼠怀孕期间,母亲产生的抗体与H-2单体型有关. 确定的主要抗体是IgG1,一种非细胞毒性类型,可能具有保护作用.
科学领域:
- 免疫学 免疫学 免疫学
- 生殖生物学 生殖生物学
- 遗传学 是一个遗传学.
背景情况:
- 母亲对胎儿抗原的免疫反应在哺乳动物中发生,但其意义尚不清楚.
- 在小鼠中,对父亲遗传的胎儿抗原的抗体产生取决于菌株和H-2原型.
- 之前的研究表明,母体配方抗体的细胞毒性活性,这项研究重新评估.
研究的目的:
- 为了识别在小鼠怀孕期间产生的母性异位抗体的特定免疫球蛋白 (Ig) G 子类.
- 确定这些附抗体的功能性质,特别是细胞毒性.
- 为了阐明母亲在怀孕期间的全抗体反应的生物学相关性.
主要方法:
- 血液凝结试验检测针对胎儿基因相容性抗原的alloantibodies.
- 使用来自血细胞瘤的异型特异性抗血清的修改血液吸收试验.
- 在母体血清中评估补充依赖细胞毒性.
主要成果:
- 孕产妇的抗体产生与杂交小鼠菌株的特定H-2单元型有关.
- 在母体血清中没有检测到显著的补充依赖细胞毒性活性.
- 主要的抗体反应涉及IgG1亚类,这是非补充固定的.
- 小鼠怀孕会诱导一种非细胞毒性IgG1抗体.
结论:
- 在小鼠怀孕中,主要的母体抗体反应是由非细胞毒性IgG1亚类调解的.
- 这种IgG1类抗体可能具有免疫增强或保护性质,而不是有害.
- 这些发现有助于理解母胎免疫接口以及特定抗体子类的作用.
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Antibody Structure
Overview
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...
Transcytosis of IgG
Transcytosis is the process in which molecules are internalized by endocytosis, transported across the cell, and released through exocytosis from the opposite end of the cell. Molecules such as insulin, immunoglobulins, and certain nutrients are transferred through the recycling endosomes by recycling and transcytosis.
IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...
IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...
Hybridoma Technology
Hybridoma technology is used for the large-scale production of monoclonal antibodies. Monoclonal antibodies bind to only a single antigenic determinant or epitope. Such antibodies are used in research, diagnostics, and disease therapy. The hybridoma technology established in 1975 by Georges Köhler and Cesar Milstein was awarded the Nobel Prize in Medicine in 1984 for revolutionizing research and therapy.
Hybridoma Selection
Commonly used fusion techniques — electroporation, polyethylene glycol...
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Commonly used fusion techniques — electroporation, polyethylene glycol...
Antibody Structure and Classes
Antibodies, also known as immunoglobulins, are produced by B cells in response to foreign substances, such as bacteria and viruses. These proteins are critical for recognizing and neutralizing these substances, protecting the body from potential harm.
The basic structure of an antibody consists of four protein chains: two identical heavy chains and two identical light chains. These chains are held together by disulfide bonds and other non-covalent interactions, forming a Y-shaped structure.
The basic structure of an antibody consists of four protein chains: two identical heavy chains and two identical light chains. These chains are held together by disulfide bonds and other non-covalent interactions, forming a Y-shaped structure.
Antibody Actions
Antibodies, or immunoglobulins, are critical players in the immune system's arsenal against invading pathogens. Produced by B cells and plasma cells, their primary role is to detect and bind to specific antigens, molecules found on the surface of pathogens like bacteria or viruses. Beyond antigen recognition, antibodies perform several vital functions that contribute to immune defense.
Neutralization
Antibodies can bind to pathogens, preventing them from infecting host cells. This process...
Neutralization
Antibodies can bind to pathogens, preventing them from infecting host cells. This process...
Development of Immunocompetence
The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
