Mass Spectrometric Blood Metabogram: Acquisition, Characterization, and Prospects for Application

Area of Science:

• Analytical Chemistry
• Clinical Chemistry
• Biochemistry

Background:

• Metabolomics enables simultaneous measurement of numerous metabolites, presenting opportunities for clinical laboratory diagnostics.
• Direct infusion mass spectrometry (DIMS) and principal component analysis (PCA) are powerful tools for analyzing complex biological samples.

Purpose of the Study:

• To develop a simplified and clinically applicable mass spectrometric metabogram for blood plasma metabolome analysis.
• To characterize the components of the metabogram and assess their clinical relevance.

Main Methods:

• Development of a metabogram using direct infusion mass spectrometry (DIMS) on blood plasma samples from 48 healthy male volunteers.
• Application of principal component analysis (PCA) to mass spectra to define metabogram components.
• Characterization of metabogram components using metabolite set enrichment analysis (MSEA) and clinical test results.

Main Results:

• Seven PCA-defined components were identified, explaining approximately 70% of blood plasma metabolome variability.
• These components represent functionally related metabolic groups, including those involved in regulation, lipid-carbohydrate metabolism, lipid-amine metabolism, eicosanoids, lipid intake, and liver function.
• The metabogram components provide significant clinically relevant information.

Conclusions:

• The developed metabogram offers a clinically applicable approach to metabolomics analysis.
• Metabogram analysis can yield valuable insights into various physiological and pathological processes.
• This method holds promise for enhancing clinical laboratory diagnostics through metabolomics.