Analysis and Annotation of Phospholipids by Mass Spectrometry-Based Metabolomics

Area of Science:

• Biochemistry
• Analytical Chemistry
• Metabolomics

Background:

• Phospholipids are crucial for cell membranes and signaling.
• Dysregulation of phospholipid homeostasis is implicated in various diseases.
• Mass spectrometry-based metabolomics offers a powerful tool for phospholipidome characterization.

Purpose of the Study:

• To describe an untargeted method for determining phospholipids and related metabolites.
• To analyze diverse biological matrices like plasma, serum, erythrocytes, and tissues.
• To provide guidelines for phospholipid annotation using fragmentation patterns.

Main Methods:

• Utilized high-throughput direct mass spectrometry fingerprinting.
• Employed ultra-high-performance reversed-phase liquid chromatography coupled to mass spectrometry (UHPLC-RP-LC-MS).
• Applied to various biological samples including plasma, serum, erythrocytes, and tissues.

Main Results:

• Successfully characterized phospholipids and related metabolites in multiple biological matrices.
• Demonstrated the utility of combined direct infusion MS and UHPLC-RP-LC-MS for comprehensive analysis.
• Identified characteristic fragmentation patterns for straightforward phospholipid annotation.

Conclusions:

• The described untargeted method enables comprehensive human phospholipidome characterization.
• This approach is valuable for identifying disease biomarkers related to phospholipid alterations.
• Understanding phospholipid fragmentation patterns facilitates accurate metabolite identification.