一种新发现的贝MyD88与TLR相互作用,并在先天免疫系统中发挥作用
Baoyu Huang1, Jilv Ma1, Wenwen Xu2
1School of Agriculture, Ludong University, Yantai, 264025, China.
Fish & shellfish immunology
|June 13, 2024
概括
一个新的Myeloid分化因子-88 (MyD88) 基因CfMyD88-2在贝中被发现,揭示了它在天生的免疫力中的作用. 该基因对病原体的挑战做出反应,并激活免疫信号通路,提供对疾病耐药性的见解.
科学领域:
- 无脊椎动物免疫学 无脊椎动物免疫学
- 分子生物学分子生物学
- 基因组学就是基因组学.
背景情况:
- 骨髓状细胞分化因子-88 (MyD88) 对于天生的免疫中类似收费受体 (TLR) 信号传递至关重要.
- 贝类中MyD88介导的信号机制在很大程度上仍然没有被描述.
研究的目的:
- 为了识别和表征Zhikong (Chlamys farreri) 中的一种新型MyD88基因.
- 调查已识别的CfMyD88-2基因的功能和免疫反应作用.
主要方法:
- 基因克隆和CfMyD88-2的基因测序.
- 生物信息分析包括序列比较和家族遗传分析.
- 使用qRT-PCR进行基因表达分析.
- 在HEK293T细胞中进行共免疫沉积和双化酶记者基因测定.
- 亚细胞局部化研究.
主要成果:
- 鉴定出了一种新型贝MyD88基因CfMyD88-2,具有保存死亡和TIR域.
- 在所有组织中检测到CfMyD88-2mRNA表达,在地幔和肝中最高水平,并且在病原体相关分子模式 (PAMPs) 刺激时显著上调.
- CfMyD88-2与贝TLR相互作用,并激活干扰素 (IFN) 和NF-κB记者基因,表明其在TLR免疫信号传递中的作用.
结论:
- 新型CfMyD88-2基因在的天生的免疫反应中起着重要作用.
- CfMyD88-2参与TLR信号通路,并应对PAMP的挑战.
- 这些发现为了解无脊椎动物免疫力和选择抗病提供了基础.
相关概念视频
Role Of Notch Signalling In Intestinal Stem Cell Renewal
2.1K
Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
2.1K
Antigens Involved in Adaptive Immunity
483
An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and...
Complete Antigens
Complete antigens possess both immunogenicity and...
483
T Cell Activation and Clonal Selection
701
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Naive T cells that have not yet encountered an antigen express two primary CD...
701
T Cell Types and Functions
999
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...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
999
The JAK-STAT Signaling Pathway
8.8K
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
8.8K
Defense Against Bacterial Pathogens
1.4K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
1.4K


