Homing and Differentiation of Adult Stem Cells to Lung

成体干细胞向肺的归巢和分化

• 批准号: 7258950
• 负责人: DARWIN Johnson PROCKOP
• 金额: $ 179.14万
• 依托单位: TULANE UNIVERSITY OF LOUISIANA
• 依托单位国家: 美国
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-18 至 2010-05-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7258950
• 关键词: Homing; Differentiation; Adult; Stem; Cells

DESCRIPTION (provided by applicant): This application is to foster collaborative research among four groups of investigators at two neighboring institutions that will develop definitive data about the potential usefulness of adult stem cells to treat important pulmonary diseases. The staff includes one group of investigators with expertise in the preparation and characterization of adult stem cells, two groups of investigators with expertise in animal models for diseases such as fibrosis and emphysema, and a fourth group with expertise in the development of viral vectors for correction of the genetic disease cystic fibrosis (CF). The research will focus on the special class of adult stem cells that can be isolated from a patient's own bone marrow and that are referred to as mesenchymal stem cells or marrow stromal cells (MSCs). The program project format will allow the investigators to advance the field by performing collaborative work that cannot be carried out with individual research grants. Three sub-populations of MSCs that are well characterized will be tested in an innovative co-culture system that assays quantitatively their potential for repairing damaged pulmonary cells. We will also explore the possibility that cell fusion may play a role in the repair of pulmonary cells by MSCs. In addition, it will use a new assay for competitive engraftment to determine which sub-population of MSCs engrafts most efficiently in lungs of immunodeficient mice. The three sub-populations of cells will be assayed for engraftment and differentiation in a model for lung damage by asbestos and in a tracheal explant model. The three sub-populations of cells will be tested for their effectiveness in repairing lung damage in an elastase model for emphysema. In addition, we will attempt to define the mechanisms by which MSCs engraft in lung. MSCs from patients with CF will be engineered to correct the gene defect and then tested to determine whether they can become functional ciliated epithelial cells. Of necessity, the investigators will have to quickly share data as their experiment progresses. For example, data will suggest which sub-populations of MSC should be tested in the other three projects. As another example, the experience developed with lentiviruses will make it possible to use viruses for tracking MSCs.

描述(由申请人提供)： 这项应用是为了促进相邻两个机构的四组研究人员之间的合作研究，这些研究将开发关于成人干细胞治疗重要肺部疾病的潜在有用性的明确数据。工作人员包括一组在成人干细胞的制备和表征方面有专长的研究人员，两组在纤维化和肺气肿等疾病的动物模型方面有专长的研究人员，以及第四组在为纠正遗传性疾病囊性纤维化(CF)而开发病毒载体方面有专长的研究人员。这项研究将专注于一种特殊的成人干细胞，这种干细胞可以从患者自己的骨髓中分离出来，被称为间充质干细胞或骨髓基质细胞(MSCs)。方案项目格式将允许研究人员通过开展个人研究拨款无法开展的合作工作来推动该领域的发展。三个具有良好特性的MSCs亚群将在创新的共培养系统中进行测试，该系统将定量分析它们修复受损肺细胞的潜力。我们还将探索细胞融合在MSCs修复肺细胞中发挥作用的可能性。此外，它还将使用一种新的竞争性植入方法来确定哪个亚群的MSCs在免疫缺陷小鼠的肺部植入最有效。这三个细胞亚群将在石棉肺损伤模型和气管外植体模型中进行植入和分化分析。这三个细胞亚群将在肺气肿的弹性酶模型中测试它们在修复肺损伤方面的有效性。此外，我们还将尝试确定MSCs在肺内植入的机制。来自CF患者的MSCs将被工程改造以纠正基因缺陷，然后进行测试，以确定它们是否可以成为功能性纤毛上皮细胞。不可避免的是，随着实验的进行，研究人员必须迅速分享数据。例如，数据将建议在其他三个项目中测试MSC的哪些亚群。作为另一个例子，慢病毒的经验将使使用病毒追踪MSCs成为可能。