T cell-mediated lung ischemia-reperfusion injury

T细胞介导的肺缺血再灌注损伤

基本信息

批准号：
7985780
负责人：
Victor E Laubach
金额：
$ 37.53万
依托单位：
UNIVERSITY OF VIRGINIA
依托单位国家：
美国
项目类别：
财政年份：
2005
资助国家：
美国
起止时间：
2005-05-01 至 2014-05-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/7985780
关键词：
Ablation Acute Address Adoptive Transfer Alveolar Alveolar Macrophages Antibodies Antigens Blocking Antibodies Bone Marrow Bone Marrow Transplantation CD4 Positive T Lymphocytes Cells Chronic Clinical Research Coculture Techniques Complication Data Dendritic Cells Development Diphtheria Toxin Future Immune In Vitro Infiltration Inflammation Inflammatory Inflammatory Response Injury Interleukin-17 Interleukin-6 Ischemia Knock-out Knockout Mice Knowledge Laboratories Leukocytes Lung Lung Inflammation Lung Transplantation Macrophage Activation Measures Mediating Mediator of activation protein Mus NADPH Oxidase Neutrophil Infiltration Outcome Oxidative Stress Pathway interactions Phagocytes Postoperative Period Process Production Reactive Oxygen Species Reperfusion Injury Reperfusion Therapy Role Source T-Cell Activation T-Lymphocyte Testing Transgenic Mice Transplant Recipients Transplantation Tumor Necrosis Factor-alpha Wild Type Mouse cytokine design human TNF protein improved in vivo in vivo Model interleukin-23 lung injury lung ischemia macrophage mortality neutrophil public health relevance small molecule

项目摘要

DESCRIPTION (provided by applicant): Ischemia-reperfusion (IR) injury remains a major source of early mortality after lung transplantation. The objective of this proposal is to better understand the cellular mechanisms that initiate and mediate this inflammatory process. Our laboratory has established that lung IR injury is dependent on alveolar macrophage activation, CD4+ T cell infiltration, and TNF-alpha induction. Recent data also supports an important role for IL-17 and IL-17-producing CD4+ T cells, such as iNKT, in mediating lung inflammation after IR. Thus Aim 1 will determine if iNKT cells initiate lung IR injury and neutrophil infiltration via IL-17 production. Oxidative stress and the release of reactive oxygen species via NADPH oxidase is also a component of IR injury as well as phagocytic cell activation. Thus Aim 2 will determine if NADPH oxidase-generated ROS is a key mechanism for the activation of iNKT cells after IR. Our overall hypothesis is that lung IR injury is initiated through CD4+ iNKT cell activation via production of IL-17 and NADPH oxidase-dependent ROS. Results from this proposal will help design successful strategies to improve outcomes in lung transplant recipients. PUBLIC HEALTH RELEVANCE: Project Narrative: Lung reperfusion injury is a major complication after transplantation resulting in dangerous inflammation, higher post-operative mortality, and late complications including chronic rejection. The objective of this proposal is to better understand the cellular mechanisms that initiate and mediate lung reperfusion injury. Results from this proposal will help design successful strategies to improve outcomes in lung transplantations.

描述（由申请人提供）：缺血再灌注（IR）损伤仍然是肺移植后早期死亡的主要来源。该提案的目的是更好地了解启动和介导这种炎症过程的细胞机制。我们的实验室已经确定，肺 IR 损伤依赖于肺泡巨噬细胞活化、CD4+ T 细胞浸润和 TNF-α 诱导。最近的数据还支持 IL-17 和产生 IL-17 的 CD4+ T 细胞（例如 iNKT）在介导 IR 后肺部炎症中发挥重要作用。因此，目标 1 将确定 iNKT 细胞是否通过产生 IL-17 引发肺 IR 损伤和中性粒细胞浸润。氧化应激和通过 NADPH 氧化酶释放活性氧也是 IR 损伤和吞噬细胞激活的一个组成部分。因此，目标 2 将确定 NADPH 氧化酶产生的 ROS 是否是 IR 后激活 iNKT 细胞的关键机制。我们的总体假设是，肺 IR 损伤是通过 CD4+ iNKT 细胞通过产生 IL-17 和 NADPH 氧化酶依赖性 ROS 激活而引发的。该提案的结果将有助于设计成功的策略来改善肺移植受者的预后。公共卫生相关性：项目叙述：肺再灌注损伤是移植后的主要并发症，会导致危险的炎症、较高的术后死亡率以及包括慢性排斥反应在内的晚期并发症。该提案的目的是更好地了解引发和介导肺再灌注损伤的细胞机制。该提案的结果将有助于设计成功的策略来改善肺移植的结果。