Inflammasome and Gasdermin Signaling Networks for Regulation of Pyroptosis and Cytokine Release

用于调节焦亡和细胞因子释放的炎性体和 Gasdermin 信号网络

基本信息

批准号：
10223154
负责人：
GEORGE R DUBYAK
金额：
$ 188.67万
依托单位：
CASE WESTERN RESERVE UNIVERSITY
依托单位国家：
美国
项目类别：
财政年份：
2020
资助国家：
美国
起止时间：
2020-07-24 至 2025-06-30
项目状态：
未结题

来源：
https://reporter.nih.gov/project-details/10223154
关键词：
Acute Alzheimer&apos s Disease Amyloid Apoptosis Apoptotic Autophagocytosis Biochemical Biochemistry CASP1 gene CASP3 gene CASP8 gene CASP9 gene Caspase Categories Cell Death Cell Lineage Cell membrane Cell physiology Cells Cellular biology Chronic Complex Crohn&apos s disease Cytolysis DNA Disease Disease model Dysmyelopoietic Syndromes Effector Cell Elements Epithelial Cells Extracellular Space Familial Mediterranean Fever Functional disorder Genetic Goals Golgi Apparatus Immune Immune response Immunologics Infection Inflammasome Inflammation Inflammatory Inflammatory Bowel Diseases Innate Immune Response Interleukin-1 beta Investigation Link Literature Lytic Mediating Mediator of activation protein Membrane Molecular Molecular Chaperones Multiple Sclerosis Mus Myeloid Cells Myocardial Infarction N-terminal Necrosis Nonlytic Pathogenesis Pathogenicity Pathway interactions Peptide Hydrolases Peptide Signal Sequences Population Production Proteins Publishing Reagent Regulation Reporting Secretory Vesicles Signal Transduction Source Sterility Stimulus Structure T-Lymphocyte Testing Tissues Ulcerative Colitis VDAC1 gene cell killing cell type cytokine extracellular gastrointestinal granulocyte human disease inflammatory disease of the intestine intestinal epithelium macrophage microbial mouse model neutrophil novel programs response restraint structural biology trafficking

项目摘要

OVERALL PROGRAM PROJECT: ABSTRACT Cell death pathways have historically been characterized by the proteases that become activated during cell fate decisions. Apoptosis has been defined by initiator and effector caspase activation and, largely due to the reagents available; cell death decisions were initially thought to be binary – caspase-dependent (apoptosis) or caspase-independent (all others). Much like other binary distinctions – like Th1 versus Th2 T cells or M1 versus M2 macrophages, which have undergone substantial expansion in the past decade, cell death decisions and their consequences are now recognized to be much more variables. In fact, even the mechanisms of cell death have been refined. They are no longer categorized by the proteases which activate the cascades but rather, by the effector mechanism. Necroptotic cell death is caused by activation of the pore-forming protein, MLKL. Secondary necrosis is caused by activation of the pore-forming protein, DFNA5 (Gasdermin E/GSDME), and pyroptosis is caused by activation of the pore-forming protein, Gasdermin D (GSDMD) This last category of cell death - pyroptosis - is one of the most immunologically important forms of cell death. Not only does pyroptosis kill the cell, but also GSDMD activation allows the release of IL-1β. This cytokine is among the most important in acute and chronic inflammation. Its secretion is implicated in rare genetic inflammatory diseases such as Familial Mediterranean Fever as well as more common diseases such as myocardial infarction, Alzheimer's disease, Crohn's disease and Ulcerative Colitis, Multiple Sclerosis and many others. With the discovery of the inflammasome in 2002 and its subsequent study, it became clear that the amyloid-like activation of these inflammasome complexes drove pro-IL-1β cleavage and IL-1β release from the cell, but also pyroptosis. Missing from this biochemistry, though, was the cell biology underlying IL-1β release. How is IL- 1β recognized by caspases and other proteases? If IL-1β is not released through a secretory ER-Golgi mechanism, how is trafficked out of the cell? How is this release coordinated with pyroptosis and other regulated cell death pathways that are operative in different populations of immune effector cells. This Program Project aims to utilize cell physiology, biochemistry, structural biology, and mouse and human disease models to unravel these important questions.

总体计划项目：摘要细胞死亡途径历来以蛋白酶为特征，这些蛋白酶成为细胞命运决定过程中激活的细胞凋亡由启动子和效应子 caspase 定义。激活，很大程度上是由于可用的试剂决定了细胞死亡；是二元的——半胱天冬酶依赖性（细胞凋亡）或半胱天冬酶独立（所有其他）。其他二元区别——例如 Th1 与 Th2 T 细胞或 M1 与 M2 巨噬细胞，在过去十年中经历了大幅扩展，细胞死亡决定及其事实上，现在人们认识到后果的变数要多得多，甚至其机制也是如此。细胞死亡已被细化，不再按激活的蛋白酶进行分类。级联反应而是由效应机制引起的坏死性细胞死亡。成孔蛋白 MLKL 的激活导致继发性坏死。成孔蛋白 DFNA5 (Gasdermin E/GSDME) 和细胞焦亡是由成孔蛋白 Gasdermin D (GSDMD) 最后一类细胞死亡 - 细胞焦亡 - 细胞焦亡是免疫学上最重要的细胞死亡形式之一。细胞，而且 GSDMD 激活可以释放 IL-1β，这种细胞因子是其中最多的。在急性和慢性炎症中很重要，其分泌与罕见遗传有关。炎症性疾病，例如家族性地中海热以及更常见的疾病例如心肌梗塞、阿尔茨海默病、克罗恩病和溃疡性结肠炎，随着 2002 年炎性小体及其相关疾病的发现，多发性硬化症等。随后的研究表明，这些炎症小体的淀粉样蛋白样激活复合物驱动 IL-1β 前体裂解和细胞中 IL-1β 释放，同时也驱动细胞焦亡。然而，这种生物化学中缺少的是 IL-1β 释放的细胞生物学原理。 1β 被半胱天冬酶和其他蛋白酶识别吗？如果 IL-1β 不通过分泌释放？ ER-高尔基体机制，如何被运输出细胞？焦亡和其他在不同群体中起作用的受调节细胞死亡途径该计划旨在利用细胞生理学、生物化学、结构生物学、小鼠和人类疾病模型来解答这些重要问题。