Separation of acylcarnitines from biological samples using high-performance liquid chromatography

Area of Science:

• Biochemistry
• Analytical Chemistry

Background:

• Carnitine and acylcarnitines are vital metabolites involved in fatty acid metabolism.
• Accurate quantification of these compounds is essential for understanding various metabolic disorders.

Purpose of the Study:

• To develop and validate a novel reverse-phase high-performance liquid chromatography (HPLC) method.
• To enable precise separation and quantification of carnitine and acylcarnitines from biological matrices.

Main Methods:

• Utilized a step gradient reverse-phase HPLC technique for separation.
• Employed a sensitive radioenzymatic assay for quantification.
• Applied the method to rat liver tissues under diverse physiological conditions.

Main Results:

• Achieved baseline resolution of individual acylcarnitines and acylcarnitine classes.
• Demonstrated minimal sample preparation requirements and prevention of cross-contamination.
• Confirmed the method's ability to resolve long-chain acylcarnitines from carnitine and short-chain acylcarnitines with high accuracy (<0.05% coelution).

Conclusions:

• The developed HPLC method is a valid and useful tool for acylcarnitine analysis in biological systems.
• The technique supports the study of acylcarnitines across a wide range of metabolic states.
• Confirms the utility of perchloric acid fractionation for functional acylcarnitine classification.