A20欠乏マウスにおけるTNF誘発のNF-kappaBと細胞死反応の制御に失敗した
1Department of Medicine, The University of Chicago, 5841 South Maryland Avenue, MC 6084, Chicago, IL 60637, USA.
まとめ
A20タンパク質は,腫瘍死滅因子 (TNF) 誘発核因子カッパB (NF-kappaB) 反応を停止することによって,炎症を抑制します. A20が欠けているマウスは,A20を強調して,重度の炎症と細胞死亡の増加を示します.
科学分野:
- 免疫学 免疫学とは
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
背景:
- A20は炎症シグナル伝達経路の重要な調節体です.
- 核因子カッパB (NF-kappaB) と腫瘍死滅因子 (TNF) は,免疫反応と細胞死において中心的な役割を果たします.
- これらの経路の調節不良は,炎症性疾患に寄与する.
研究 の 目的:
- TNF誘発のNF-kappaB活性を終了するA20の役割を調査する.
- 炎症と細胞死に対するA20欠乏のインビボの結果を決定する.
- 過剰な炎症反応を予防するA20の重要な機能を明らかにする.
主な方法:
- TNF刺激後のA20メッセンジャーRNA (mRNA) 発現の分析.
- A20欠乏マウスのフェノタイプの特徴付け,炎症とカシェキシアの評価を含む.
- A20欠乏細胞におけるTNF媒介プログラム細胞死 (PCD) に関するインビトロ研究.
- TNFへの反応としてNF-kappaBシグナリング終了の評価.
主要な成果:
- TNF刺激は,組織全体でA20mRNA発現を強力に増加させます.
- A20欠乏症のマウスは,重度の炎症,カシェキア,リポポリサッカリドおよびTNFに対する過敏性,および早死を示します.
- A20欠乏細胞は,TNF誘発のNF-kappaB応答の終了が損なわれていることを示しています.
- これらの細胞は,TNF媒介のPCDに対する感受性の増加を示しています.
結論:
- A20は,TNF誘発のNF-kappaBシグナル伝達を vivo で終了することによって,炎症を制限するために不可欠です.
- A20は,TNF信号伝達経路における重要な負のフィードバックレギュラーとして作用します.
- A20の欠乏は,制御不能な炎症を引き起こし,細胞死に対する感受性を高め,その保護的役割を強調します.
さらに関連する動画
09:52A Chromatin Immunoprecipitation Assay to Identify Novel NFAT2 Target Genes in Chronic Lymphocytic Leukemia
Published on: December 4, 2018
07:55A Macrophage Reporter Cell Assay to Examine Toll-Like Receptor-Mediated NF-kB/AP-1 Signaling on Adsorbed Protein Layers on Polymeric Surfaces
Published on: January 7, 2020
関連する概念動画
NF-κB-dependent Signaling Pathway
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
The Extrinsic Apoptotic Pathway
The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
NF-kB-dependent Signaling Pathway
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
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...
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...
