Functional Genomics Of Critical Illness

危重疾病的功能基因组学

• 批准号: 7212416
• 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/7212416
• 关键词: bacterial pneumonia; biological signal transduction; biomarker; clinical research; dexamethasone; diagnostic respiratory lavage; 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; neutrophil; pathologic process; respiratory epithelium; septic shock; sickle cell anemia; tissue /cell culture

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. Standard approaches to amplication of small samples tested. Experience obtained 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.

介绍和目的：微阵列技术和蛋白质组学方法有望成为理解复杂疾病功能基因组学的关键工具。危重病或受伤的患者经常死于不完全理解的疾病，如感染性休克，急性呼吸窘迫综合征，并最终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起主要致病作用。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，器官损伤综合征的定义可能与其相关的基因表达模式改变有关。 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。这一系列研究的目标包括：1）将病理生理学和/或干预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。 进度： 开发用于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、脾、肝、肺和心脏。 小样本扩增测试的标准方法。 在寡核苷酸微阵列方面获得的经验，包括人类、小鼠和大鼠。 数据分析管道的构建和广泛测试。 建立数据库和网络分析工具。 干扰素g和地塞米松在原代支气管上皮细胞中相互作用的研究。 在正常志愿者中鉴定与镰状细胞性贫血、内毒素攻击和大鼠模型中感染严重程度升级相关的表达谱。 建议的工作路线： 定义原代人体细胞（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。 确定不同类型的细菌感染是否会在大鼠肺炎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，连续检测脓毒症诱导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预后的生物标志物。