MOLECULAR STRUCTURE OF N-ACETYL CYSTEINE METAL COMPLEXES

N-乙酰半胱氨酸金属配合物的分子结构

• 批准号: 8170323
• 负责人: FARIDEH JALILEHVAND
• 金额: $ 0.03万
• 依托单位: STANFORD UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-05-01 至 2011-02-28
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8170323
• 关键词: Acetylcysteine; Anti-Inflammatory Agents; Anti-inflammatory; Antioxidants; Chelating Agents; Complex; Computer Retrieval of Information on Scientific Projects Database; Cysteine; Data Analyses; Drug Metabolic Detoxication; Excretory function; Funding; Goals; Grant; Heavy Metals; Institution; Ions; Metals; Methods; Molecular Structure; Nuclear; Penicillamine; Physiological; Principal Component Analysis; Research; Research Personnel; Resources; Solutions; Source; Structure; Techniques; Testing; Trace Elements; United States National Institutes of Health; absorption; aqueous; base; improved; metal complex; metal poisoning; solid state

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. N-acetyl-L-cysteine (NAC), a natural antioxidant, improves the efficiency of chelating agents used against heavy metal poisoning and facilitates the excretion of Cr(III), Cd(II) and Pb(II), but not of Hg(II). Recent bio-tests on NAC complexes with transition biometals (Zn2+, Co2+, Co3+, Fe2+) showed significant anti-inflammatory activity. The goal of our proposed research is to study the structure of NAC complexes with heavy metals, and transition biometals, in solid state and in aqueous solution at physiological pH and pH = 8.5, using different [NAC]/[Mn+] ratios and [Mn+] = 10 and 100 mM. In this study, we will combine the results from different spectroscopic techniques, such as extended x-ray-absorption fine structure (EXAFS), multi-nuclear NMR, Raman and IR, to identify the local structure around the central metal ion in these complexes. We will use the method that we have developed for EXAFS data analysis of mixtures for similar Cd(II), Hg(II) and Pb(II) complexes with cysteine and penicillamine (3,3'-dimethyl cysteine), including Principal Component Analysis (PCA) of the EXAFS spectra. The aim of the current study is to provide a basis for better understanding of the detoxification treatments and the anti-inflammatory activities with the use of cysteine derivatives as complex-forming agents.

该副本是利用众多研究子项目之一 由NIH/NCRR资助的中心赠款提供的资源。子弹和 调查员（PI）可能已经从其他NIH来源获得了主要资金， 因此可以在其他清晰的条目中代表。列出的机构是 对于中心，这不一定是调查员的机构。 天然抗氧化剂N-乙酰基L-半胱氨酸（NAC）提高了用于重金属中毒的螯合剂的效率，并促进CR（III），CD（II）和PB（II）的排泄，但不是Hg（ii）。最近在NAC复合物（Zn2+，CO2+，CO3+，Fe2+）上进行的生物测试显示出显着的抗炎活性。我们提出的研究的目的是使用不同的[NAC]/[MN+]比例，在生理pH和pH = 8.5处研究具有重金属和过渡生物态的NAC复合物的结构，并在生理pH和pH = 8.5处研究了NAC复合物的结构，并且[Mn+]比率[Mn+] = 10和100 mm。在这项研究中，我们将结合不同光谱技术的结果，例如扩展的X射线吸收精细结构（EXAFS），多核NMR，Raman和IR，以识别这些复合物中中央金属离子周围的局部结构。我们将使用我们开发的方法用于与类似CD（II），Hg（II）和Pb（II）配合物的混合物的数据分析，其中包括半胱氨酸和青霉素（3,3'-二甲基半胱氨酸），包括EXAFS光谱的主成分分析（PCA）。当前研究的目的是通过使用半胱氨酸衍生物作为复杂形成剂来更好地理解排毒治疗和抗炎活性的基础。