B細胞枯渇によるCOVID-19ワクチン接種後のデノボ免疫誘導は,炎症性中枢神経系疾患の患者の強いT細胞免疫によって特徴付けられています
Mathias Fousse1, Verena Klemis2, Saskia Bronder2
1Department of Neurology, Saarland University, Homburg, Germany.
Brain and behavior
|September 3, 2025
まとめ
B細胞が枯渇した患者は,mRNAワクチンの抗体反応は弱いが,T細胞反応は強い. この強固なT細胞免疫は,重度のCOVID-19疾患に対する保護を提供する可能性があります.
科学分野:
- 免疫学
- ワクチン学
- 神経免疫学
背景:
- B細胞が枯渇した個体における免疫反応は複雑で,完全に理解されていません.
- B細胞の減少は適応免疫,特に体内反応に大きな影響を及ぼします.
研究 の 目的:
- 炎症性中枢神経系疾患のB細胞枯渇患者におけるSARS-CoV-2 mRNAワクチン (BNT162b2) に対する臨床的および免疫学的反応を調査する.
- 抗体とT細胞の反応を比較するために,B細胞が枯渇した患者と健康な対照群の間で,
主な方法:
- BNT162b2による二重同型mRNAワクチン接種,ブースター接種,または感染.
- スパイク固有のIgGと中和活性測定
- スパイク反応性T細胞 (CD4とCD8) とサイトカイン発現のフローサイトメトリック分析
- 自己報告の反応性評価
主要な成果:
- 患者と対照群の反応性も同様でした.
- すべての対照群では,スパイク特異の抗体が誘発され,患者の43%だけが,IgG濃度が著しく低下し,中和能力が低下しました.
- 両グループでスパイク反応性T細胞が誘発され,患者に似たCD4と高いCD8T細胞濃度が見られた.
- 患者は,特に3回目の予防接種後,多機能,トリプルサイトカイン発現するCD4およびCD8T細胞の比率が高かった.
結論:
- B細胞が枯渇した患者は,複数のSARS-CoV-2 mRNAワクチンの投与後に体内免疫反応を起こす能力が限られている.
- B細胞が枯渇した患者のワクチン誘発のT細胞反応は強固で多機能である.
- 強いT細胞反応は,抗体生産が低下したにもかかわらず,B細胞が枯渇した個体において,重度のCOVID-19疾患に対する保護を提供することができる.
関連する概念動画
Immunodeficiency Diseases
1.2K
Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency...
There are three main causes of immunodeficiency...
1.2K
Cell-mediated Immune Responses
72.2K
Overview
72.2K
Vaccinations
45.3K
Overview
45.3K
Cytotoxic T Cells-mediated Immune Response
1.9K
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
1.9K
Immunological Memory
4.8K
Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
4.8K
Immune Response Against Viral Pathogens
917
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
917


