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関連する概念動画

B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

17.9K
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...
17.9K
Affinity and Avidity01:41

Affinity and Avidity

40.1K
Overview
40.1K
Hybridoma Technology01:31

Hybridoma Technology

18.3K
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,...
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Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

9.9K
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...
9.9K
Antibody Structure01:10

Antibody Structure

67.3K
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...
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Antibody Structure01:10

Antibody Structure

15.1K
No description available
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関連する実験動画

Updated: Mar 23, 2026

Flow Cytometric Characterization of Murine B Cell Development
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Flow Cytometric Characterization of Murine B Cell Development

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生殖中心における抗体親和性の成熟を視覚化

Jeroen M J Tas1, Luka Mesin1, Giulia Pasqual1

  • 1Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA.

Science (New York, N.Y.)
|February 26, 2016
PubMed
まとめ

ゲルミナルセンター (GC) は,B細胞の競争を通じて高親和抗体を生成する. この研究では,GCは,強い選択なしに,親和性成熟の間に多様なB細胞クローンを維持することができ,ワクチンの開発に影響を与えます.

さらに関連する動画

Interrogating Individual Autoreactive Germinal Centers by Photoactivation in a Mixed Chimeric Model of Autoimmunity
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Interrogating Individual Autoreactive Germinal Centers by Photoactivation in a Mixed Chimeric Model of Autoimmunity

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Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers
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Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers

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関連する実験動画

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08:25

Flow Cytometric Characterization of Murine B Cell Development

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Interrogating Individual Autoreactive Germinal Centers by Photoactivation in a Mixed Chimeric Model of Autoimmunity
11:12

Interrogating Individual Autoreactive Germinal Centers by Photoactivation in a Mixed Chimeric Model of Autoimmunity

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Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers
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Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers

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科学分野:

  • 免疫学
  • 分子生物学
  • ウイルス学

背景:

  • 抗体は生殖中心 (GC) 内の体変異によって高い親和性を獲得する.
  • B細胞クローンとその変異体の間の競争は,平均抗体の親和性を高めます.
  • GC内のクローン多様性に対する高親和性細胞選択の影響は十分に理解されていません.

研究 の 目的:

  • 生殖中心におけるB細胞のクローン多様性と親和性の成熟との関係を調査する.
  • 効率的な親和性成熟が同質化選択を必要とするかどうかを判断する.
  • 非免疫主体の抗体特異性の誘導を必要とするワクチン戦略への影響を調査する.

主な方法:

  • GCのB細胞動態を視覚化するために,マルチフォトン顕微鏡を用いた.
  • B細胞のレパートリー多様性を分析するために配列化技術を使用した.
  • クローン進化と選択圧力を追跡するために 画像と配列を組み合わせた

主要な成果:

  • 数十から数百の異なるB細胞クローンが各GCを起動します.
  • GCはクローン多様性の減少率が非常に変動する.
  • 効率的な抗体親和性成熟は,強い均質化選択なしに進行することができる.
  • 複数のB細胞クローンは同じGC内で並行して成熟することができます.

結論:

  • ゲルミナルセンターのB細胞の競争は,常にクローン多様性の劇的な損失につながるわけではありません.
  • アフィニティ成熟は,多様なB細胞クローンで同時に起こる.
  • 発見は,HIV-1やインフルエンザのような病原体にとって重要な,より支配的でないエピトープに対する抗体を誘発するように,ワクチン戦略を設計することができることを示唆している.