The role of ECSODF in lung repair after silica-induces injury

ECSODF 在二氧化硅诱导损伤后肺修复中的作用

• 批准号: 8299125
• 负责人: CHERYL L FATTMAN
• 金额: $ 38.24万
• 依托单位: UNIVERSITY OF PITTSBURGH AT PITTSBURGH
• 依托单位国家: 美国
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-15 至 2014-06-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8299125
• 关键词: Address; Adult; Alveolar Cell; Alveolus; Animals; Antioxidants; Apoptosis; Area; Asbestos; Biochemical; Biodistribution; Biological Models; Bleomycin; Bone Marrow; Cell Culture Techniques; Cell Survival; Cells; Chronic; Deposition; Development; Diagnosis; Disease; Doctor of Philosophy; Engraftment; Environment; Enzymes; Equilibrium; Excision; Exposure to; Extracellular Matrix; Extracellular Space; Fibroblasts; Fibrosis; Genes; Goals; Heparin Binding; Impairment; In Vitro; Inflammatory; Injury; Knockout Mice; Knowledge; Lead; Longevity; Lung; Lung Inflammation; Lung diseases; Mediating; Mesenchymal Stem Cell Transplantation; Mesenchymal Stem Cells; Modality; Modeling; Mus; Myofibroblast; Natural regeneration; Nodule; Outcome; Oxidants; Oxidative Stress; Pathogenesis; Patients; Pharmaceutical Preparations; Play; Protein Region; Public Health; Pulmonary Fibrosis; Radiation; Reaction; Reactive Oxygen Species; Research Personnel; Role; Silicon Dioxide; Silicosis; Site; Stem cells; Structure; Structure of parenchyma of lung; Superoxide Dismutase; Testing; Therapeutic; Tissues; Translating; Transplantation; Work; adult stem cell; alveolar destruction; design; effective therapy; extracellular; improved; in vivo; induced pluripotent stem cell; injured; intravenous administration; lung development; lung injury; lung repair; migration; mimetics; outcome forecast; overexpression; particle; prevent; programs; repaired; respiratory; response; restoration; tissue regeneration; tissue repair; treatment strategy

DESCRIPTION (provided by applicant): Silicosis develops many years after initial exposure to silica particles and is characterized by chronic inflammation, lung fibrosis and ultimately respiratory impairment. There is no effective treatment for silicosis. As a result, patients diagnosed with silicosis are given a dismal prognosis and many patients are still dying of this disease. The biochemical mechanisms behind silicosis are poorly characterized, however oxidants do play a role in disease development. The antioxidant enzyme extracellular superoxide dismutase (ECSOD), the major antioxidant enzyme in the lung extracellular matrix (ECM), protects against other fibrotic lung diseases. Previous studies have correlated the loss of ECSOD with worsening lung injury and a pro-oxidant lung environment. ECSOD overexpression or treatment with SOD-mimetic drugs can prevent this injury. Thus, one component of an effective treatment strategy may be the restoration of the oxidant / antioxidant balance in the lung. Studies show that administration of mesenchymal stem cells (MSCs) can participate in the repair of lung tissue after oxidative injury. However, little is known about the effects of a highly oxidative lung microenvironment on stem cell-mediated tissue repair. Therefore, the investigators hypothesize that silicosis results in a pro-oxidant microenvironment that leads to the reduced efficacy of mesenchymal stem cells to repair lung damage. The investigators will employ a mouse silicosis model whereby MSCs purified from either ECSOD null mice or ECSOD overexpressing mice are administered to animals exposed to silica. The effects of modulating antioxidant levels of both the stem cells and the recipient mice will be determined on the efficacy of the stem cell treatment. When complete, these studies will provide valuable information on the influence of the lung microenvironment on the ability of stem cells to abrogate lung disease. These studies will also begin to address the feasibility of transplanting purified MSCs with augmented antioxidant capabilities into patients with silicotic lung disease as therapy. Lung disease due to silica exposure (silicosis) is a continuing public health problem that has no effective treatment. This project examines the use of adult stem cells along with increased levels of antioxidants in the treatment of silicosis. These studies will help determine the feasibility of using adult stem cells in the treatment of patients with silicosis.

描述（由申请人提供）：

项目成果

Innate immune activation by inhaled lipopolysaccharide, independent of oxidative stress, exacerbates silica-induced pulmonary fibrosis in mice.

• DOI: 10.1371/journal.pone.0040789
• 发表时间: 2012
• 期刊: PloS one
• 影响因子: 3.7
• 作者: Brass DM;Spencer JC;Li Z;Potts-Kant E;Reilly SM;Dunkel MK;Latoche JD;Auten RL;Hollingsworth JW;Fattman CL
• 通讯作者: Fattman CL