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Immunological Memory01:23

Immunological Memory

4.7K
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...
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T Cell Types and Functions01:24

T Cell Types and Functions

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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
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Lymphoid Cells and Tissues01:18

Lymphoid Cells and Tissues

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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...
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Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

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Overview
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B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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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...
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Updated: Sep 8, 2025

Co-Culture of Murine Small Intestine Epithelial Organoids with Innate Lymphoid Cells
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IL-25誘発の記憶型2の先天性リンパ球が粘膜免疫を強める

Victor S Cortez1, Sara Viragova2, Satoshi Koga1

  • 1Department of Medicine, University of California, San Francisco, San Francisco, CA 94143, USA.

Cell
|September 6, 2025
PubMed
まとめ
この要約は機械生成です。

腸内ヘルミントはIL-25を用いて保護的な腸の適応を誘導し,宿主の免疫を強化する. この適応には 慢性的な炎症を引き起こすことなく 病原菌に対する抵抗力を 提供する 特殊な免疫細胞が含まれます

キーワード:
IL-25 についてILC2s についてアラミンエピジェネティクス皮質幹細胞ヘルミントの感染生まれつきの記憶小腸組織の適応

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Isolation of Group 2 Innate Lymphoid Cells from Mouse Nasal Mucosa to Detect the Expression of CD226
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Intravital Imaging of Intraepithelial Lymphocytes in Murine Small Intestine
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関連する実験動画

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Isolation of Group 2 Innate Lymphoid Cells from Mouse Nasal Mucosa to Detect the Expression of CD226
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科学分野:

  • 免疫学
  • 寄生虫学
  • 胃腸内科

背景:

  • 腸内ヘルミントは 生存と繁殖のために宿主の反応を調節するメカニズムを進化させた.
  • 2型先天性リンパ球細胞 (ILC2) を含むインタールイキン-25 (IL-25) 経路は,寄生虫に対する宿主の防御に役割を果たします.
  • 寄生虫は このIL-25媒介の回路を 利便に操ることができます

研究 の 目的:

  • IL-25を用いた小腸適応の誘導と特性を調査する.
  • この適応が宿主の病原菌に対する耐性への影響を 決定する.
  • 粘膜の回復力を維持するILC2sの役割を明らかにする.

主な方法:

  • 脊椎動物モデルにおけるIL-25投与による小腸の適応誘導
  • 誘導後の解剖学的および免疫学的変化の評価
  • 転写および表遺伝分析によるエフェクター記憶ILC2の特徴化.
  • 病原菌に対する宿主耐性の評価

主要な成果:

  • IL-25は小腸に持続的な解剖学的および免疫学的変化を引き起こした.
  • 適応により,肺を含む様々なバリア病原体に対する耐性が高まった.
  • エフェクタ・メモリILC2は,内在的な訓練とは異なり,転写および表遺伝的に変化した.
  • これらの改変されたILC2は活性化状態を維持し,慢性的な炎症なしに粘膜の回復力をサポートしました.

結論:

  • IL-25は,広範な保護効果を持つ,持続的な腸の適応状態を誘発することができます.
  • 改変したエフェクター-メモリーILC2は,この回復力の重要な媒介者であり,分布した粘膜防御を調整する.
  • この経路は宿主の免疫を強化し,病原体による損傷を防ぐための新しい戦略を提供します.