Solid-phase extraction technique for gas-chromatographic profiling of acylcarnitines

Area of Science:

• Clinical Biochemistry
• Analytical Chemistry
• Metabolic Disorders

Background:

• Acylcarnitine profiling is crucial for diagnosing inborn errors of metabolism.
• Existing methods for acylcarnitine analysis can be complex and time-consuming.
• Accurate and sensitive detection of acylcarnitines in urine is essential for early diagnosis.

Purpose of the Study:

• To develop a simple, selective, and sensitive clean-up method for gas-chromatographic profiling of acylcarnitines in urine.
• To establish a quantitative approach for differential evaluation of acylcarnitines for metabolic disorder detection.
• To validate the method for various acylcarnitine chain-lengths and demonstrate its clinical applicability.

Main Methods:

• Solid-phase cation-exchange extraction for sample clean-up.
• Gas chromatography separation following derivatization into acyloxylactones.
• Quantitative analysis for differential evaluation of acylcarnitines.

Main Results:

• A selective and sensitive screening method for urinary acylcarnitines was established.
• The method is fast, routinely applicable, and suitable for any biochemical laboratory.
• Validation confirmed accuracy for various acylcarnitine chain-lengths, with specific attention to medium-chain acylcarnitines.

Conclusions:

• The developed method offers a robust approach for acylcarnitine analysis in urine.
• It facilitates the rapid and reliable detection of inborn errors of metabolism.
• The quantitative nature allows for monitoring acylcarnitine excretion over time, aiding in disease management.