Extraction for metabolomics: access to the metabolome

Area of Science:

• Metabolomics
• Analytical Chemistry
• Biochemistry

Background:

• The accuracy of metabolomic studies hinges on the completeness of metabolite extraction from biological samples.
• Reliable data and conclusions in metabolomics depend on comprehensive and reproducible sample preparation techniques.

Purpose of the Study:

• To evaluate the efficiency and reliability of various sample pre-treatment methods in metabolomics.
• To discuss the applicability of different extraction techniques across various metabolomic research fields.

Main Methods:

• Review of pre-extraction techniques, including sample collection, homogenization, grinding, and storage.
• Analysis of extraction solvent properties and their impact on metabolite recovery.
• Description of common extraction techniques (Microwave-Assisted Extraction, Solid-Phase Extraction, Supercritical Fluid Extraction, Soxhlet) and a novel comprehensive extraction method.

Main Results:

• Over 200 studies indicate that pre-extraction steps significantly influence yield and reproducibility.
• Extraction techniques, alongside solvent choice, critically determine the spectrum of measurable metabolites.
• Sample handling procedures (collection, homogenization, grinding, storage) impact results.

Conclusions:

• Evaluating the efficacy and reproducibility of sample pre-treatment is crucial for ensuring metabolomic study reliability.
• The comprehensive extraction method presents a promising approach for the broad extraction of diverse metabolites.
• Standardized pre-treatment protocols are essential for robust metabolomic data.