Challenges and recent advances in quantitative mass spectrometry-based metabolomics

Area of Science:

• Metabolomics and Mass Spectrometry
• Biomarker Discovery and Drug Development

Background:

• Metabolomics studies are crucial for understanding metabolic variations in pathologies and responses to drugs or contaminants.
• Current metabolomics often relies on relative quantitation, limiting inter-study comparisons and longitudinal analyses.
• Accurate quantitation in metabolomics is essential for robust biomarker discovery and therapeutic development.

Purpose of the Study:

• To review widely used mass spectrometry (MS)-based techniques for quantitative metabolomics.
• To discuss principles, limitations, and challenges of various quantitative MS approaches.
• To highlight the importance of absolute quantitation for advancing metabolomics research.

Main Methods:

• Review of quantitative mass spectrometry (MS) techniques in metabolomics.
• Discussion of methods including external/internal standards, derivatization, isotopic labeling, and MS imaging.
• Analysis of principles, limitations, and challenges associated with each quantitative approach.

Main Results:

• Exploratory metabolomics often uses relative quantitation, but absolute quantitation offers greater accuracy.
• Quantitative MS techniques, when properly applied, enable reliable metabolite measurements.
• Various strategies exist for quantitative metabolomics, each with specific advantages and drawbacks.

Conclusions:

• Accurate quantitation in metabolomics is vital for robust biomarker discovery and understanding metabolic variability.
• Quantitative mass spectrometry techniques are essential tools for advancing diagnostics and therapeutics.
• This review provides insights into the selection and application of quantitative MS methods in metabolomics.