Fluorescent Copper Probes for Intracellular Imaging

用于细胞内成像的荧光铜探针

• 批准号: 6877055
• 负责人: CHRISTOPH J FAHRNI
• 金额: $ 19.02万
• 依托单位: GEORGIA INSTITUTE OF TECHNOLOGY
• 依托单位国家: 美国
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-04-01 至 2009-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6877055
• 关键词: X ray crystallography; bioimaging /biomedical imaging; confocal scanning microscopy; copper; electrochemistry; flow cytometry; fluorescence microscopy; fluorescent dye /probe; imaging /visualization /scanning; intracellular transport; metal metabolism

DESCRIPTION (provided by applicant): Copper is an essential trace element, which is critical to human health. The redox properties of copper require a sophisticated management to avoid oxidative damage of lipids, proteins or DNA. Therefore the cell must maintain a subtle balance, such that copper is available for catalytic processes, but at the same time avoid accumulation to toxic levels. The detailed mechanisms and cellular structures responsible for maintaining control of intracellular copper levels are not well understood. This information is critical for the understanding of the molecular mechanisms of diseases caused by copper imbalance, such as Wilson's or Menkes' disease, both of which are fatal. More recently, certain neurological disorders including ALS and Alzheimer's disease have been linked to disorders in copper metabolism. One of the central hypotheses of the copper regulatory machinery suggests the presence of intracellular storage or buffer sites as a defense against deficiency, but also to protect the cell from abnormally high concentrations of copper. Golgi secretory vesicles which contain a copper ATPase membrane protein might function as intracellular compartments for copper storage. Fluorescence probes, which can permeate the plasma membrane are powerful tools for the study of intracellular metal ion distributions, yet rigorous analytical techniques for sensitive in vivo measurements of intracellular copper levels are completely lacking. The goal of the proposed project is the development of a copper specific fluorescent probe, which would not only allow to monitor vesicular labile copper concentrations, but would also provide information about the subcellular distribution in cell lines with disorders in copper metabolism. In a larger context a copper specific fluorescent probe will be of great importance for the long-term development of novel diagnostic and therapeutic tools for copper related human diseases.

描述（申请人提供）：铜是一种必需的微量元素，对人体健康至关重要。铜的氧化还原特性需要复杂的管理，以避免脂质，蛋白质或DNA的氧化损伤。因此，细胞必须保持微妙的平衡，使铜可用于催化过程，但同时避免积累到有毒水平。负责维持细胞内铜水平的控制的详细机制和细胞结构还没有很好地理解。这一信息对于理解铜失衡引起的疾病的分子机制至关重要，例如威尔逊病或门克斯病，这两种疾病都是致命的。最近，某些神经系统疾病，包括ALS和阿尔茨海默氏病，已经与铜代谢紊乱有关。 铜调节机制的中心假设之一表明细胞内储存或缓冲位点的存在作为对缺陷的防御，但也保护细胞免受异常高浓度的铜的影响。含有铜ATP酶膜蛋白的高尔基体分泌囊泡可能作为铜储存的细胞内隔室。荧光探针，它可以渗透质膜的细胞内金属离子分布的研究是强大的工具，但严格的分析技术，灵敏的细胞内铜水平的体内测量是完全缺乏的。拟议项目的目标是开发一种铜特异性荧光探针，这不仅可以监测囊泡不稳定的铜浓度，而且还可以提供有关铜代谢紊乱的细胞系亚细胞分布的信息。在更大的范围内，铜特异性荧光探针将对铜相关人类疾病的新型诊断和治疗工具的长期发展具有重要意义。