粘膜免疫におけるBリンパ球の有機原性作用
T V Golovkina1, M Shlomchik, L Hannum
1Jackson Laboratory, 600 Main Street, Bar Harbor, ME 04609, USA.
まとめ
B細胞は,ペイヤー・パッチや卵泡関連性上皮質 (FAE) などの腸内免疫バリアの開発に不可欠です. 欠乏すると,M細胞の機能と病原体に対する宿主防御が損なわれます.
科学分野:
- 免疫学 免疫学とは
- 胃腸内科 胃腸内科
- 細胞生物学 細胞生物学
背景:
- ペイヤーのパッチの葉っぱ関連表皮 (FAE) には,リンパ性組織への病原体輸送に不可欠なM細胞が含まれています.
- これらの粘膜の免疫構造の発達と機能は完全に理解されていません.
研究 の 目的:
- ペイヤー斑,FAE,M細胞の発生におけるB細胞の役割を調査する.
- 粘膜の免疫バリアのオーガノゲネシスに対するB細胞の貢献を理解する.
主な方法:
- 野生型の対照群とB細胞欠乏マウスの比較分析.
- 回復したB細胞機能 (膜結合免疫グロブリンM発現) を有するトランスジェニックマウスを利用.
- ペイヤーパッチとFAEの発達とM細胞の存在を評価する.
主要な成果:
- ペイヤー・パッチ,FAE,M細胞の発達は,B細胞欠乏したマウスで有意に低下した.
- 膜に結合するIgMのトランスジェニック発現によるB細胞の回復はFAEの発達を救った.
- M細胞の欠如は,牛乳媒介のレトロウイルスによる感染を防ぎました.
結論:
- B細胞は,ペイヤー・パッチやFAEを含む粘膜の免疫バリアの臓器生成に不可欠です.
- 抗体分泌と抗原プレゼンテーションを超えて,B細胞は構造的免疫発達において重要な役割を果たします.
- B細胞に依存するM細胞は,特定の経路経由で感染を媒介するために不可欠です.
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関連する概念動画
Cell-mediated Immune Responses
Overview
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Lymphoid Cells and Tissues
Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
Secondary Lymphoid Organs
Secondary organs, including lymph nodes, the spleen, and mucosa-associated lymphoid tissue (MALT), work harmoniously to protect us from disease and infection.
The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...
The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...
B Cell Activation and Differentiation
The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
Defense Against Bacterial Pathogens
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
