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Modification of biomolecules by lipoxidation derived aldehydes.

机译:通过脂氧化衍生的醛对生物分子的修饰。

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摘要

Accumulating evidence implicates a role of free radical-mediated oxidative stress in many degenerative disease states, including Alzheimer disease (AD), Parkinson disease (PD), chronic heart disease, liver disease, inflammation, and aging. Free radical mediated oxidation of polyunsaturated fatty acids, present in membranes and lipoproteins, leads to generation of a diverse array of reactive aldehydes that can readily modify biomolecules such as protein and DNA. In this thesis work, we will demonstrate the modification chemistry of biomolecules including amino acids, proteins, and DNA nucleobases by lipoxidation (LPO)-derived aldehydes, mainly 4-hydroxy-2-nonenal (HNE), 4-oxo-2-nonenal (ONE), 2,4-decadienal (DDE), acrolein, and malondialdehyde (MDA). The goal of this work is mainly focused on identification through model studies of new modification adducts, which may be used as biomarkers to study lipid peroxidation and oxidative stress lesions. Elucidating chemistry of the formation of LPO-derived aldehydes-mediated adducts could also give hints to understand oxidative stress disease conditions at the molecular level. High performance liquid chromatography (HPLC), mass spectrometry (including LC/ESI-MS and MALDI-TOF MS), as well as independent synthesis are the common tools used in this thesis.
机译:越来越多的证据表明自由基介导的氧化应激在许多退化性疾病状态中起作用,包括阿尔茨海默氏病(AD),帕金森氏病(PD),慢性心脏病,肝病,炎症和衰老。膜和脂蛋白中存在的自由基介导的多不饱和脂肪酸的氧化,导致生成各种反应性醛,可以容易地修饰生物分子,例如蛋白质和DNA。在本论文中,我们将演示通过脂氧化(LPO)衍生的醛,主要是4-羟基-2-壬烯醛(HNE),4-氧代-2-壬烯醛对生物分子包括氨基酸,蛋白质和DNA核碱基的修饰化学(ONE),2,4-癸二烯醛(DDE),丙烯醛和丙二醛(MDA)。这项工作的目标主要集中在通过对新修饰加合物的模型研究进行鉴定,这些新加合物可以用作研究脂质过氧化和氧化应激损伤的生物标记。阐明LPO衍生的醛介导的加合物形成的化学反应,也可能有助于从分子水平理解氧化应激疾病的状况。高效液相色谱(HPLC),质谱(包括LC / ESI-MS和MALDI-TOF MS)以及独立合成是本文使用的常用工具。

著录项

  • 作者

    Yuan, Quan.;

  • 作者单位

    Case Western Reserve University.;

  • 授予单位 Case Western Reserve University.;
  • 学科 Chemistry Biochemistry.
  • 学位 Ph.D.
  • 年度 2006
  • 页码 299 p.
  • 总页数 299
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 生物化学;
  • 关键词

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