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相关概念视频

Peptide Identification Using Tandem Mass Spectrometry01:33

Peptide Identification Using Tandem Mass Spectrometry

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.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...

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Formation of Covalent DNA Adducts by Enzymatically Activated Carcinogens and Drugs In Vitro and Their Determination by 32P-postlabeling
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烟草特异性致癌蛋白添加物的量化LC-MS/MS方法

Breanne Freeman1, Chengguo Xing1

  • 1Department of Medicinal Chemistry, Center for Natural Products, Drug Discovery and Development (CNPD3), College of Pharmacy, University of Florida, Gainesville, Florida 32610, United States.

Chemical research in toxicology
|September 3, 2025
PubMed
概括

烟草特定的肺癌物质4-甲胺-1-甲-1-丁 (NNK) 和其代谢物4-甲胺-1甲胺-1丁 (NNAL) 存在风险. 一种新的LC-MS/MS方法在临床样本中检测NNAL诱导的蛋白质添加物,有助于癌症研究.

科学领域:

  • 环境健康
  • 毒理学
  • 分析化学

背景情况:

  • 甲基-氨基-1-氨基-1-丁 (NNK) 和甲基-氨基-1-氨基-1-丁 (NNAL) 是烟草特有的关键肺癌原体.
  • 现有的量化NNK/NNALDNA添加物的方法在临床上是不可行的,因为样本的获取有限.
  • 在临床样本中没有检测到NNAL蛋白质添加物,这对了解致癌至关重要.

研究的目的:

  • 在临床样本中开发一种敏感和特定的方法来检测NNAL诱导的蛋白质添加物.
  • 为了能够评估人群中的烟草暴露和NNAL生物活化.
  • 弥合NNAL致癌的临床前发现和临床相关性之间的差距.

主要方法:

  • 开发一种高度敏感和特定的液态染色体-双重质谱法 (LC-MS/MS) 方法.
  • 量化NNAL诱导的蛋白质添加物的化产物1-...3-pyridyl) -1,4-butanediol (PBD).
  • 该方法应用于用于生物标志物分析的各种生物样本.

主要成果:

  • 一种新的LC-MS/MS测定成功地从NNAL诱导的蛋白质添加物中量化了PBD.
  • 该方法在检测NNAL生物激活方面表现出高灵敏度和特异性.

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  • 该试验适用于多种生物矩阵,方便临床研究.

    • 结论:

    • 这项研究为在临床环境中检测NNAL诱导的蛋白质添加物提供了一种可行的方法.
    • 开发的测定对于评估NNAL生物活化和肺癌风险的生理相关性至关重要.
    • 这项进展支持烟草暴露和相关致癌的生物标志物开发.