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A rapid and validated HPLC method to quantify sphingosine 1-phosphate in human plasma using solid-phase extraction
Jan J Butter1, Richard P Koopmans, Martin C Michel
1Department of Pharmacology and Pharmacotherapy, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands. j.j.butter@amc.uva.nl
Summary
A new method accurately measures sphingosine 1-phosphate (S1P) in plasma using solid-phase extraction and HPLC. This validated technique is suitable for quantifying S1P in numerous samples.
Area of Science:
- Analytical Chemistry
- Biochemistry
- Clinical Diagnostics
Background:
- Sphingosine 1-phosphate (S1P) is a bioactive lipid mediator involved in various physiological processes.
- Accurate quantification of plasma S1P levels is crucial for understanding its role in health and disease.
- Existing methods may lack the sensitivity or throughput required for large-scale studies.
Purpose of the Study:
- To develop and validate a robust analytical methodology for determining sphingosine 1-phosphate (S1P) concentrations in human plasma.
- To establish a method suitable for high-throughput analysis of plasma S1P.
- To ensure the method meets stringent criteria for precision and accuracy.
Main Methods:
- Solid-phase extraction (SPE) for sample preparation.
- Automated reversed-phase gradient High-Performance Liquid Chromatography (HPLC) with column-switching.
- Pre-column derivatization using o-phthalaldehyde (OPA) followed by fluorescence detection.
Main Results:
- The developed method achieved a limit of quantification of 100 ng/ml for exogenous sphingosine 1-phosphate.
- Precision and accuracy, assessed by relative standard deviation, were consistently below 15% for both within- and between-day measurements.
- The methodology demonstrated suitability for quantifying plasma S1P in a large number of samples.
Conclusions:
- A validated analytical method for sphingosine 1-phosphate (S1P) determination in plasma has been successfully developed.
- The method combines SPE and automated HPLC with fluorescence detection for sensitive and reliable quantification.
- This validated approach is well-suited for large-scale clinical and research studies requiring plasma S1P measurements.