Free malondialdehyde determination in human plasma by high-performance liquid chromatography

Area of Science:

• Biochemistry
• Analytical Chemistry
• Clinical Chemistry

Background:

• Malondialdehyde (MDA) is a marker of lipid peroxidation.
• Accurate quantification of MDA in biological samples is crucial for disease research.
• Existing methods for MDA determination may have limitations.

Purpose of the Study:

• To develop and validate a high-performance liquid chromatographic (HPLC) method for quantifying MDA in human plasma.
• To assess the presence of free MDA in normal human plasma.
• To evaluate the suitability of the thiobarbituric acid (TBA) test for plasma MDA measurement.

Main Methods:

• Development of an HPLC method for MDA quantification.
• Sample preparation involved deproteinization.
• Analysis utilized a Waters carbohydrate analysis column with a specific buffer elution.
• Detection was performed at 267 nm.

Main Results:

• A robust HPLC method for MDA quantification in human plasma was successfully developed.
• No free malondialdehyde (MDA) was detected in normal human plasma samples.
• Results contrast with previously published data using other methods.

Conclusions:

• The developed HPLC method provides a reliable means for MDA quantification in human plasma.
• The absence of detectable free MDA in normal plasma challenges previous findings.
• The classical thiobarbituric acid (TBA) test is deemed unsuitable for accurate MDA determination in human plasma due to potential interference or lack of specificity.