基于深度学习的MS/MS频谱预测可促进新型精神活性物质的自动识别
Fei Wang1,2, Daniel Pasin3, Michael A Skinnider4,5,6
1Department of Computing Science, University of Alberta, Edmonton, Alberta T6G 2E8, Canada.
Analytical chemistry
|December 4, 2023
概括
一种新的深度学习方法,NPS-MS,只使用化学结构,准确地预测新的精神活性物质 (NPS) 的质谱谱谱. 这个工具可以帮助法医实验室在没有昂贵的参考标准的情况下识别NPS.
科学领域:
- 法医化学 法医化学
- 毒理学 毒理学 毒理学
- 计算化学是一种计算化学.
背景情况:
- 超过1100种新的精神活性物质 (NPS) 的出现对法医和毒理学实验室提出了重大挑战.
- 当前的工作流程依赖于昂贵且耗时的双重质谱 (MS/MS) 参考标准,这些标准通常无法用于新兴的NPS.
- 准确识别NPS对于公共卫生和执法至关重要.
研究的目的:
- 开发一种深度学习方法,从它们的化学结构中预测已知和新型NPS的MS/MS光谱.
- 提高NPS识别在法医和毒理学分析中的准确性和效率.
- 为NPS光谱预测和识别提供一个公开可访问的工具.
主要方法:
- 深度学习模型NPS-MS是使用从通用MS/MS预测模型中转移学习开发的.
- 该模型在MS/MS频谱的大数据集上进行了训练.
- 通过将NPS-MS的预测与实验获得的MS/MS光谱进行比较,并通过识别一种新型的西克利丁 (PCP) 衍生物来验证NPS-MS的有效性.
主要成果:
- 与现有方法相比,NPS-MS在从实验性MS/MS光谱中识别NPS的准确性更高.
- 该方法成功地在未知没收的粉末中识别出一种新的PCP衍生物,没有参考标准.
- 网络服务器提供了对NPS的光谱预测和对广泛数据库的识别的访问.
结论:
- NPS-MS显著提高了法医实验室快速识别已知和新兴NPS的能力.
- 深度学习方法减少了对昂贵且往往无法使用的参考标准的依赖.
- 在法医毒理学和药物分析领域,NPS-MS代表了宝贵的进步.
更多相关视频
07:34Large Scale Non-targeted Metabolomic Profiling of Serum by Ultra Performance Liquid Chromatography-Mass Spectrometry UPLC-MS
Published on: March 14, 2013
12.8K
10:13Author Spotlight: An Efficient Methodology to Confidently Differentiate and Characterize Fentanyl Analogs
Published on: November 8, 2024
2.2K
相关概念视频
Peptide Identification Using Tandem Mass Spectrometry
6.5K
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...
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...
6.5K
Mass Spectrometry: Complex Analysis
792
Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
792
Tandem Mass Spectrometry
1.0K
Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and signal-to-noise ratio for the analyte. 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 collision-induced...
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 collision-induced...
1.0K
MALDI-TOF Mass Spectrometry
4.8K
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.
Matrix-assisted laser desorption ionization (MALDI) is a commonly...
Matrix-assisted laser desorption ionization (MALDI) is a commonly...
4.8K
High-Performance Liquid Chromatography: Types of Detectors
583
The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte...
583
