针对装饰OMV货物蛋白的甘氨酸纹理具有特异性的抗体
Hyun Young Kim1,2, Christina M Rothenberger1,3, Mary E Davey1
1Department of Microbiology, ADA Forsyth Institute, Cambridge, Massachusetts, USA.
mSphere
|February 26, 2025
概括
免疫球蛋白M (IgM) 抗体特别针对来自Porphyromonas gingivalis.外膜囊泡 (OMV) 上的O-糖化蛋白. 这一发现揭示了潜在的宿主逃避策略,并建议O-甘氨酸作为P. gingivalis疫苗和治疗的目标.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 葡萄糖科学 (Glycoscience) 是一种科学.
背景情况:
- Porphyromonas gingivalis 是牙周病的关键原因,与全身疾病有关.
- 细菌O-糖化对殖民和免疫逃避有影响.
- 开发针对P. gingivalis的有效疫苗和治疗方法是具有挑战性的,因为它具有免疫逃避和可变的表面特征.
研究的目的:
- 为了确定识别P. gingivalis外膜囊泡 (OMVs) 的特定抗体.
- 调查O-糖基化在OMV抗体识别中的作用.
- 探索O-甘氨酸和OMV在P. gingivalis疫苗和治疗开发中的潜力.
主要方法:
- 对P. gingivalis菌株W83.3产生抗血清.
- 使用了缺乏特定脂蛋白或O-糖化酶的突变菌株.
- 使用前吸附试验评估免疫球蛋白M (IgM) 抗体对OMV和细菌菌株的反应性.
主要成果:
- 一个IgM抗体的子集选择性地识别了P. gingivalis OMVs.
- 通过去除一个OMV特异性脂蛋白 (PG1881) 来增强IgM特异性.
- 针对缺乏O-糖化酶的OMVs,IgM反应性显著降低,这表明了甘氨酸-蛋白质标.
- IgM 识别了来自 P. gingivalis 和 Porphyromonas endodontalis 的 OMV,但没有识别其他 Bacteroidetes.
结论:
- IgM抗体向P. gingivalis OMV上的O-糖化蛋白质,这表明存在宿主逃避机制.
- 在OMV上的细菌O-甘氨酸代表了P. gingivalis疫苗的有希望的目标.
- 针对OMV的抗体提供了针对P. gingivalis感染的潜在治疗策略.
相关概念视频
Antigens Involved in Adaptive Immunity
436
An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and...
Complete Antigens
Complete antigens possess both immunogenicity and...
436
Proteoglycans
3.9K
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,...
3.9K
Immunoglobulin-like Cell Adhesion Molecules
3.2K
Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
3.2K
Cross-reactivity
30.9K
Overview
30.9K
Antibody Actions
1.0K
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...
1.0K
Membrane Carbohydrates
5.3K
The plasma membrane is a dynamic barrier composed of lipids, proteins, and carbohydrates. It is the epicenter of many cellular processes required for cell growth and survival. Carbohydrates have unique structural and chemical properties that help the plasma membrane to carry out its functions effectively.
Membrane carbohydrates do not have any hydrophobic region and are exclusively located on the cell's outer surface. The addition of sugar molecules or glycosylation of proteins happens in...
Membrane carbohydrates do not have any hydrophobic region and are exclusively located on the cell's outer surface. The addition of sugar molecules or glycosylation of proteins happens in...
5.3K


