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Matrix-Assisted Laser Desorption Ionization (MALDI)01:08

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Matrix-assisted laser desorption ionization (MALDI) is a powerful analytical technique used in mass spectrometry. It enables the identification and characterization of various biomolecules, including proteins, peptides, nucleic acids, and carbohydrates. MALDI spectrometry is widely employed in biological and medical research, as well as in fields like pharmacology and biochemistry.
The analyte of interest, a biomolecule or a mixture of biomolecules, is mixed with a suitable matrix material. The...
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Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.
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Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
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A Quantitative Glycomics and Proteomics Combined Purification Strategy
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以同位素编码的化物标签用于基于MALDI-MS的定量糖化物.

Jian Fei1, Si Liu2, Qiuyue Sha1

  • 1The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics, Hubei Bioinformatics & Molecular Imaging Key Laboratory, Systems Biology Theme, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China.

Talanta
|March 12, 2025
PubMed
概括
此摘要是机器生成的。

使用DMQCH/DMQCH-d4化物进行的新化学标签方法使得精确的定量糖化学物质成为可能. 这种技术改善了质谱信号,并且在临床样本中有效检测疾病生物标志物.

关键词:
2,6-二甲基-4-氨酸碳水化合物化物.同位素编码的化物.马尔迪 - 马尔迪 - 马尔迪MS定量糖性化学物质的使用方法

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科学领域:

  • 生物化学 生物化学
  • 分析化学 分析化学
  • 生物标志物发现发现

背景情况:

  • 糖基化变化对于理解生物过程和识别疾病生物标志物至关重要.
  • 定量糖化学,特别是使用稳定的同位素化学标记和质谱 (MS),对于这种分析至关重要.

研究的目的:

  • 开发和应用一种新型的同位素化对,以实现高效和成本效益的定量糖化合物.
  • 验证这种新标签方法在分析潜在临床应用的甘氨酸形状时的实用性.

主要方法:

  • 一种新型同位素化对的合成:2,6-二甲基-4-化碳水化合物 (DMQCH) 和其同位素DMQCH-d4.4.
  • 用DMQCH/DMQCH-d4在基于MALDI-MS的定量糖化合物中,通过还原端反应对甘氨酸进行稳定质量标记.
  • 使用马尔托赫普塔对衍生效率,MS信号增强,可重现性和线性进行验证.

主要成果:

  • DMQCH/DMQCH-d4对显示出高的衍生效率和15倍的MS信号强度增加,用于马尔托赫巴.
  • 在两个数量级上实现了出色的可重现性 (CV < 13.6%) 和线性 (R2 > 0.99).
  • 在从健康对照组和卵巢癌患者的人类血清中分析差异性N-甘氨酸样本的成功应用.

结论:

  • 新的DMQCH/DMQCH-d4同位素化物对为定量糖化合物提供了一种高效和强大的方法.
  • 这种技术显示出生物标志物发现和疾病诊断中的临床应用的巨大潜力.