加强了对Morganella spp. 的鉴定. 使用MALDI-TOF质谱仪进行测量
Mathilde Duque1, Cécile Emeraud1,2,3, Rémy A Bonnin1,2,3
1Team "Resist" UMR1184 "Immunology of Viral, Auto-Immune, Hematological and Bacterial diseases (IMVA-HB)", INSERM, Université Paris-Saclay, CEA, LabEx LERMIT, Faculty of Medicine, Le Kremlin-Bicêtre, France.
Journal of mass spectrometry and advances in the clinical lab
|September 8, 2025
概括
这项研究提高了MALDI-TOF的准确性,用于使用机器学习区分Morganella物种. 一个新的在线分类器可以改善Morganella morganii和Morganella sibonii的临床诊断.
科学领域:
- 临床微生物学 临床微生物学
- 生物信息学是一种生物信息学.
- 机器学习 机器学习
背景情况:
- 包括M. sibonii和M. morganii在内的Morganella属在临床上是相关的,但人们对其了解甚少.
- 目前的MALDI-TOF系统难以区分Morganella物种,限制了常规诊断.
- 全基因组测序 (WGS) 准确,但不适合快速的实验室工作流程.
研究的目的:
- 改善MALDI-TOF在摩根氏菌物种识别方面的性能.
- 为临床实验室开发可靠和用户友好的诊断工具.
- 为了提高对人类病理学中的M. morganii和M. sibonii的理解.
主要方法:
- 应用机器学习 (ML) 算法对235种临床摩根氏菌菌株.
- 使用全基因组测序 (WGS) 进行菌株特征和遗传学分析.
- 开发了一个优化的识别模型,并确定了用于歧视的重点质谱 (MS) 峰值.
主要成果:
- ML分类器证明了识别准确度的提高.
- 确定了11个MS峰值,能够区分M. morganii和M. sibonii.
- 开发了一个公开可用的在线基于ML的分类器.
结论:
- 开发的基于ML的分类器提高了MALDI-TOF的准确性,用于区分摩根氏菌物种.
- 这为例行临床诊断提供了快速,可靠的解决方案.
- 支持更好地了解M. morganii和M. sibonii在人类健康和疾病中的作用.
相关概念视频
MALDI-TOF Mass Spectrometry
6.5K
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...
6.5K
Peptide Identification Using Tandem Mass Spectrometry
8.1K
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...
8.1K
Tandem Mass Spectrometry
2.3K
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...
2.3K
Matrix-Assisted Laser Desorption Ionization (MALDI)
974
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 is an ionization technique, 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...
974
Mass Spectrometry: Complex Analysis
1.6K
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...
1.6K


