NOVEL NERVOUS SYSTEM GLYCOPROTEINS IN AXONAL GROWTH

目的是了解轴突的分子机制 结果 一般认为，表面上的分子 生长中的轴突与环境中的其他分子相互作用， 这些分子间的相互作用对于实现正常的 神经元连接 在我们的实验室中，单克隆抗体4D7具有 最近制备了一种识别一组糖蛋白的方法， 显然与轴突生长有关 我们建议建立一个全面的小组， 这些4D7糖蛋白的研究旨在回答 它们的结构和功能之间的关系。 这些研究 包括：1）碳水化合物和肽部分的化学， 分子。 2)分析这些基因的表达调控 糖蛋白及其与先前描述的细胞粘附的关系 分子，和3）这些蛋白质的功能特性的研究， 特别是它们在神经突生长和轴突再生中的作用。 哺乳动物神经发育中这些糖蛋白的分析 系统可能有助于我们了解轴突生长的机制， 正常人脑的发育。 任何异常的表达 这些蛋白质可能会对发育造成严重后果。 因此，很可能这一项目将提供相关信息 用于未来的智力迟钝研究 也将有助于我们的 神经再生的知识，这可能有积极的影响， 周围神经损伤的未来治疗。 提出了一种多方面的方法来分析这些新的 糖蛋白 免疫学和细胞培养方法的使用占主导地位 这些项目。 将使用可用的单克隆抗体 用于蛋白质的免疫亲和层析纯化。 这些 抗体也将广泛用于免疫细胞化学研究， 光和电子显微镜水平。 这些抗体将用于 原代培养系统，以阐明的功能特性， 糖蛋白 此外，单克隆抗体的生产 计划提供对每种4D7免疫反应性蛋白具有特异性的 为实施这些项目进行了额外的探索。

The objectives are to understand the molecular mechanisms underlying axonal outgrowth. It is generally believed that molecules on the surface of growing axons interact with other molecules in their environment, and that these molecular interactions are essential for the achievement of normal neuronal connections. In our laboratory, a monoclonal antibody 4D7 has recently been prepared which recognizes a group of glycoproteins that are apparently involved in axonal growth. We propose a comprehensive group of studies of these 4D7 glycoproteins which are designed to answer the relationship between their structures and their functions. These studies include: 1) chemistry of the carbohydrate and peptide portions of the molecules. 2) analysis of the regulation of expression of these glycoproteins, and their relationship to previously described cell adhesion molecules, and 3) a study of the functional properties of these proteins, particularly their role in neurite outgrowth and axon regeneration. Analysis of these glycoproteins in the development of the mammalian nervous system may help us to understand the mechanisms of axonal growth in development of normal human brain. Any abnormalities in the expression of these proteins would likely have severe developmental consequences. Therefore, it is likely that this project will provide relevant information for future studies in mental retardation. And will also contribute to our knowledge of nerve regeneration, which could have positive implications for future treatment of peripheral nerve injuries. A multi-faceted approach is proposed for the analysis of these novel glycoproteins. The use of immunological and cell culture methods dominate these projects. Monoclonal antibodies, which are available, will be used for immunoaffinity chromatographic purification of proteins. These antibodies will also be used extensively for immunocytochemical studies at the light and electron microscopic levels. The antibodies will be used in primary culture systems to elucidate the functional properties of the glycoproteins. In addition, the production of monoclonal antibodies specific for each 4D7-immunoreactive proteins is planned to provide additional probes to carry out these projects.