Functional Genomics Of Critical Illness

危重疾病的功能基因组学

• 批准号: 6993908
• 负责人: ROBERT L DANNER
• 金额: --
• 依托单位: CLINICAL CENTER
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/6993908
• 关键词: adult respiratory distress syndrome; bacteria infection mechanism; biological signal transduction; biomarker; biotechnology; clinical research; dexamethasone; endotoxins; functional /structural genomics; gene expression; gene expression profiling; genetically modified animals; human subject; immune response; interferon gamma; laboratory mouse; laboratory rat; microarray technology; molecular biology information system; monocyte; multiple organ failure; myocardium disorder; neutrophil; respiratory epithelium; septic shock; sickle cell anemia

Introduction and Objective: Microarray technology and proteomic approaches promise to become a pivotal tool in understanding the functional genomics of complex diseases. Critically ill or injured patients frequently die of incompletely understood conditions such as septic shock, acute respiratory distress syndrome, and ultimately multiple organ dysfunction syndrome. Host inflammatory pathways are thought to play major pathogenic roles in these syndromes. At a basic level, the clinical and biological manifestations of host responses are determined or at least reflected by quantitative and qualitative changes in gene expression. Therefore, organ injury syndromes might be defined by their associated patterns of altered gene expression. Oligonucleotide microarrays can measure relative changes in mRNA levels for thousands of genes simultaneously providing a global snapshot of the transcriptome. The goals of this line of investigation include: 1) to link pathophysiology and/or interventions with responding genes; 2) identify system characteristics, signaling pathways, and regulatory networks important to critical illness; 3) discover biomarkers, prognostic indicators, and potential targets for drug development. Progress: Development of laboratory procedures for handling a variety of sample types including neutrophils, peripheral blood mononuclear cells, T-lymphocytes, whole blood broncheoalveolar lavage, spleen, liver, lung, and heart. Preliminary testing of amplication procedures. Experience with oligonucleotide microarrays for several species including human, mouse and rat. Construction and extensive testing of a data analysis pipeline. Establishment of a database and web based analytical tools. Investigation of interactions between interferon g and dexamethasone in primary bronchial epithelial cells. Identification of the expression profiles associated with sickle cell anemia, endotoxin challenge in normal volunteers, and escalating severity of infection in a rat model. Proposed Course of Work: Define the in vitro response of primary human cells including neutrophils, monocytes, and endothelial cells to endotoxin and other immune activators. Determine whether infection with different types of bacteria produce organism-specific signatures in a rat model of pneumonia. Using knockout mice with specific genetic defects serially examine the severity of sepsis-induced myocardial dysfunction, associated changes in gene expression, and outcome. Identify biomarkers of disease severity and outcome in sickle cell anemia.

简介和目的：微阵列技术和蛋白质组学方法有望成为了解复杂疾病功能基因组学的关键工具。危重或受伤的患者经常死于不完全了解的疾病，例如感染性休克、急性呼吸窘迫综合征以及最终的多器官功能障碍综合征。宿主炎症途径被认为在这些综合征中发挥主要致病作用。在基本水平上，宿主反应的临床和生物学表现由基因表达的定量和定性变化决定或至少反映。因此，器官损伤综合征可能由其相关的基因表达改变模式来定义。 寡核苷酸微阵列可以同时测量数千个基因的 mRNA 水平的相对变化，提供转录组的全局快照。该研究方向的目标包括：1）将病理生理学和/或干预措施与响应基因联系起来； 2）确定对危重疾病重要的系统特征、信号通路和调控网络； 3）发现生物标志物、预后指标和药物开发的潜在靶点。 进步： 开发处理各种样本类型的实验室程序，包括中性粒细胞、外周血单核细胞、T 淋巴细胞、全血支气管肺泡灌洗液、脾、肝、肺和心脏。 扩增程序的初步测试。 拥有针对包括人类、小鼠和大鼠在内的多个物种的寡核苷酸微阵列的经验。 数据分析管道的构建和广泛测试。 建立数据库和基于网络的分析工具。 原代支气管上皮细胞中干扰素 g 与地塞米松相互作用的研究。 鉴定与镰状细胞性贫血、正常志愿者中内毒素激发以及大鼠模型中感染严重程度升级相关的表达谱。 拟议的工作过程： 定义原代人类细胞（包括中性粒细胞、单核细胞和内皮细胞）对内毒素和其他免疫激活剂的体外反应。 确定不同类型细菌的感染是否在肺炎大鼠模型中产生生物体特异性特征。 使用具有特定遗传缺陷的基因敲除小鼠连续检查脓毒症引起的心肌功能障碍的严重程度、相关的基因表达变化和结果。 确定镰状细胞性贫血疾病严重程度和结果的生物标志物。