Characterization of Tagged Type IV Collagen

项目摘要 IV型胶原α 1（COL4A1）和α 2（COL4A2）的突变是单基因 脑小血管疾病，也与脑小血管疾病标志显著相关 在大规模的全基因组关联研究中， 在人类身上。我们研究的广泛目标是了解COL4A1和COL4A2在细胞中的生物学功能。 细胞外基质，并确定其引起遗传性和获得性脑血管疾病的机制 疾病和功能障碍。本提案的具体目的是验证一个潜在的强大工具， 能够揭示胶原沉积和降解的组织特异性和时间变化。 无法区分细胞类型特异性或细胞外基质的时间变化构成了一个重要的因素。 这是理解组织生物学基本方面的一个重大障碍。为了克服这一障碍，我们 开发了一种小鼠系，其中COL4A1与可转换荧光蛋白融合，用于同种型特异性 可视化和生物化学标记用于差异亲和纯化。这个简单但强大的工具将使 ECM的空间、时间、生物化学和生物物理参数的前所未有的表征， 目前不可能实现。如果本提案中概述的详细验证成功，我们将 开发了一种变革性的工具，将为组织生物学的基本方面提供重要的见解 并且可以应用于正常发育或病理环境中的身体的每个器官。

PROJECT SUMMARY Mutations in type IV collagen alpha 1 (COL4A1) and alpha 2 (COL4A2) are an important cause of monogenic cerebral small vessel disease and are also significantly associated with cerebral small vessel disease hallmarks in large-scale genome wide association studies underscoring their importance for general cerebrovascular health in humans. The broad goal of our research is to understand the biological functions COL4A1 and COL4A2 in the extracellular matrix and determine the mechanisms by which they cause genetic and acquired cerebrovascular disease and disfunction. The specific purpose of this proposal is to validate a potentially powerful tool that will enable unveiling of tissue specific and temporal changes in collagen deposition and degradation. The inability to distinguish cell type specific or temporal changes to the extracellular matrix constitutes a significant obstacle for understanding a fundamental aspect of tissue biology. To address this barrier, we developed a mouse line in which COL4A1 is fused with switchable fluorescent proteins for isoform-specific visualization and biochemical tags for differential affinity purification. This simple but powerful tool will enable unprecedented characterization of spatial, temporal, biochemical and biophysical parameters of ECM that are currently impossible to achieve. If the detailed validations outlined in this proposal are successful, we will have developed a transformative tool that will provide significant insight into a fundamental aspect of tissue biology and that can be applied to every organ of the body in normal development or in pathological settings.