iPSC-Derived Alveolar Epithelial Cells for Intrapulmonary Therapies

 描述（由申请人提供）：本申请是根据PAR-13-095提交的，旨在检测来源于人诱导多能干细胞（hiPSC）的谱系定向细胞用于治疗先天性肺病。本提案中概述的方法建立在我们团队在发育个体发育，组织工程，干/祖细胞研究，新型体内成像方式和翻译非人灵长类动物模型方面的专业知识基础上。我们已经研究了将人类多能细胞分化为肺相关谱系的方法，包括气道上皮细胞（AEC）;具有独特支架和基质的工程构建体;并开发了有效标记，移植和监测移植前体在恒河猴体内命运的技术。我们现在准备推进我们先前的发现并开辟新的领域，以解决与iPSC衍生的前体相关的关键问题，以治疗先天性肺病，如肺表面活性物质缺乏症，通过以下具体目标：（1）优化3D培养中hiPSC的谱系定型以增强AEC分化和纯度，和（2）进行概念验证研究以评估体内胎儿移植效率和细胞命运。我们将优化3D培养中关键细胞群的增殖和整合，以增强谱系特异性，并通过创新的成像范例（包括生物发光成像和正电子发射断层扫描/计算机断层扫描（PET/CT））评估移植效率和体内细胞命运。肺的修复能力有限，基于发育原则的再生概念，根据患者的年龄定制，在平移灵长类动物模型中进行测试，并使用最先进的成像技术，可能会对该领域产生重大影响。这些调查将提供新的见解，并指导转化研究的新途径，这些研究可能对儿童和所有年龄组的生命周期产生重大影响和令人信服的好处。

 DESCRIPTION (provided by applicant): This application is submitted in response to PAR-13-095 with the intent of testing lineage committed cells derived from human induced pluripotent stem cells (hiPSC) for the treatment of congenital lung diseases. The approaches outlined in this proposal build on the expertise of our team in developmental ontogeny, tissue engineering, stem/progenitor cell studies, novel in vivo imaging modalities, and a translational nonhuman primate model. We have studied methods to differentiate human pluripotent cells towards lung-related lineages including airway epithelial cells (AECs); engineered constructs with unique scaffolds and matrices; and developed techniques to effectively label, transplant, and monitor the fate of transplanted precursors in vivo in rhesus monkeys. We are now poised to advance our prior discoveries and break new ground to address key questions related to iPSC-derived precursors to treat congenital lung diseases, such as pulmonary surfactant deficiency, through the following Specific Aims: (1) Optimize lineage commitment of hiPSCs in 3D culture to enhance AEC differentiation and purity, and (2) Conduct proof-of-concept studies to evaluate fetal transplant efficiency and cell fate in vivo. We will optimize proliferation and integration o key cell populations in 3D culture to enhance lineage specification, and evaluate transplant efficiency and cell fate in vivo through innovative imaging paradigms including bioluminescence imaging and positron emission tomography/computed tomography (PET/CT). The lung has limited capacity for repair, and regenerative concepts that are based on developmental principles, tailored to the age of the patient, tested in a translational primate model, and use state-of-the-art imaging technologies could have a major impact on the field. These investigations will provide new insights and guide new avenues of translational research that could have significant impact and compelling benefits for children and all age groups across the lifespan.