IKKalpha限制了巨细胞NF-kappaB的激活,并有助于解决炎症
Toby Lawrence1, Magali Bebien, George Y Liu
1Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, University of California San Diego, 9500 Gilman Drive, California 92093, USA. t.lawrence@imperial.ac.uk
Nature
|April 29, 2005
概括
伊卡帕B激酶 (IKK) α子单元通过促进NF-kappaB的去除来抑制炎症. 这与IKKbeta形成鲜明对比,突出了IKK子单元在先天免疫中的对立作用.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
背景情况:
- 炎症对天生的免疫力至关重要,但慢性炎症是许多疾病的基础.
- 解决炎症的机制比促进炎症的途径了解得更少.
- 包括 IKKalpha 和 IKKbeta 在内的 IkappaB 激酶 (IKK) 复合体调节了 NF-kappaB 转录因子,这些因子是炎症的核心.
研究的目的:
- 调查IKKalpha在炎症反应中的未知作用.
- 阐明IKKalpha在调节巨细胞激活和炎症中的作用.
主要方法:
- 利用小鼠模型研究IKKalpha在炎症中的功能.
- 分析了NF-kappaB子单位的营业额和发起人协会.
- 评估了IKKalpha失活对炎症过程和细菌清除的影响.
主要成果:
- 确定了IKKalpha在消极调节炎症中的新型作用.
- 证明IKKalpha加速了NF-kappaB子单元 (RelA,c-Rel) 从炎症基因促进体中的转换和去除.
- 表明小鼠中的IKKalpha无活化会加剧炎症并损害细菌清除.
结论:
- IKKalpha 作为巨细胞激活和炎症的负调节剂.
- IKKalpha和IKKbeta在控制炎症和天生的免疫力方面具有对立但互补的作用.
- 了解这些对立的作用是复杂控制免疫反应的关键.
相关概念视频
Inflammation
Overview
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...
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...
Immune Surveillance by NK Cells and Phagocytes
Immune surveillance is an integral part of the innate immune system, involving the continuous monitoring of peripheral tissues to detect and respond to pathogens, infected cells, or cancerous cells. This surveillance is conducted primarily by natural killer (NK) cells and phagocytes, which employ distinct but complementary mechanisms to identify and eliminate threats.
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
Chronic Inflammation: Introduction
Chronic inflammation is a prolonged, dysregulated immune response that persists for weeks to years when the inciting stimulus is difficult to eradicate or when self‑antigens drive ongoing reactivity. Morphologically, it is defined by mononuclear cell infiltration, progressive tissue destruction, and concurrent attempts at healing via angiogenesis and fibrosis. Compared with acute inflammation, edema is less prominent while cellular infiltration predominates; triggers include persistent...


