プロアポプトティックBcl-2相対性Bimは,特定のアポプトティック反応,白血球の恒常性,および自己免疫を排除するために必要です

P Bouillet¹, D Metcalf, D C Huang

¹The Walter and Eliza Hall Institute of Medical Research, Melbourne, Victoria 3050, Australia.

Science (New York, N.Y.)

|November 27, 1999

まとめ

Bcl-2-関連タンパク質Bimは,免疫細胞におけるアポトーシスの調節に不可欠です. その欠如は,免疫システムの機能障害とマウスの自己免疫疾患につながる.

科学分野:

細胞生物学細胞生物学
免疫学免疫学とは
分子生物学は分子生物学である.

背景:

Bcl-2タンパク質ファミリーはアポトーシスを調節する.
BimのようなBH3のみのタンパク質は,重要な調節因子である.
ビムの生理学的役割は完全に理解されていません.

研究の目的:

ネズミの遺伝子ターゲティングを使用してBimの生理学的役割を調査する.
血液形成の恒常性および自己免疫におけるBimの役割を理解するために.

主な方法:

マウスの遺伝子ターゲティングで,Bim欠乏モデルを作成します.
リンパ球集団とT細胞発達の分析.
様々なアポプトシス刺激に対する反応の評価.

主要な成果:

ビム欠乏症は,リンパ性および骨髄性細胞の蓄積を引き起こしました.
Bim欠乏したマウスでは,T細胞の発達が低下していた.
Bimが欠けていたマウスは,プラズマ細胞の蓄積により自己免疫性腎疾患を発症した.
リンパ球は,Bimなしで特定のアポプトシス刺激に対して抵抗を示した.

結論:

Bimは,血液形成性ホメオスタシスの維持に不可欠です.
ビームは,自己免疫性の発達に対する障壁として作用します.
明確なBH3のみのタンパク質は,特定の死亡刺激に反応してアポトーシスを媒介する可能性があります.

さらに関連する動画

14:29

Examination of Thymic Positive and Negative Selection by Flow Cytometry

Published on: October 8, 2012

14:06

Isolation of Precursor B-cell Subsets from Umbilical Cord Blood

Published on: April 16, 2013

関連する概念動画

01:40

Cell-mediated Immune Responses

Overview

01:28

Cells of the Innate Immune Response

The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...

01:20

Special Features of Adaptive Immunity

The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...

01:23

Cells of the Adaptive Immune Response

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...

01:27

Cytotoxic T Cells-mediated Immune Response

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...

01:24

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...

関連する実験動画