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相关概念视频

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
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...
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...

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相关实验视频

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Non-contact, Label-free Monitoring of Cells and Extracellular Matrix using Raman Spectroscopy
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基于LC-MS的加速同位素稀释德斯莫辛量化,用于估计弹性质的周转率.

Elena Kuzmanova1, Angela McIntyre1, Maaz Syed2

  • 1Systems Medicine, School of Medicine, University of Dundee, Dundee, UK.

Bioanalysis
|February 1, 2025
PubMed
概括

一种新的快速测定方法显著缩短了德斯莫辛分析时间,将其缩短到30分钟. 这一突破可以更快地评估弹性质降解,弹性质降解是衰老和疾病死亡风险的关键生物标志物.

关键词:
德斯莫辛 (Desmosine) 是一种可怕的药物.一个大动脉动脉瘤.大动脉切割剖析.微固相提取微固相提取方法微波炉微波炉微波炉微波炉微波炉的作用是什么稳定的同位素稀释LC-MS/MS/MS

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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:

  • 循环中的总德斯莫辛表明系统性弹性素降解,这是疾病和衰老中死亡风险的生物标志物.
  • 目前对德斯莫辛的分析方法耗时,超过23小时,限制了临床效用.
  • 稳定同位素稀释液态色谱-质谱法 (LC-MS) 是测量德斯莫辛的关键技术.

研究的目的:

  • 开发一种显著更快的方法来分析流通的总德斯莫辛.
  • 为了缩短稳定同位素稀释LC-MS德斯莫辛试验的试验周转时间.

主要方法:

  • 研究了微波辅助的酸水解,以更快地准备样本.
  • 评估了固态提取后的直接注入,以简化工作流程.
  • 优化了酸水解温度和时间,以及固相提取化体积.

主要成果:

  • 使用微波辅助水解和优化的固体相提取,实现了总体测试时间约为30分钟.
  • 验证了具有良好的日内和日间精度和准确性的测定.
  • 与对照人群相比,急性大动脉剖析患者的德斯莫辛度明显更高.

结论:

  • 使用微波辅助水解和精简的固体相提取,可以进行快速的德斯莫辛分析.
  • 开发的快速测定增强了德斯莫辛作为死亡风险生物标志物的潜在临床应用.
  • 这一进步有助于更快地了解不同疾病状态中的弹性质降解.