A specifi c, accurate, and sensitive measure of total plasma malondialdehyde by HPLC

Hamdy F. Moselhy, Raymond G. Reid, Saeed Yousef, Susanne P. Boyle

Research output: Contribution to journalArticlepeer-review

125 Citations (Scopus)


Malondialdehyde (MDA) is one of the most commonly reported biomarkers of lipid peroxidation in clinical studies. The reaction of thiobarbituric acid (TBA) with MDA to yield a pink chromogen attributable to an MDA-TBA 2 adduct is a common assay approach with products being quantified by ultraviolet-Vis assay as nonspecific TBAreactive substances (TBARS) or chromatographically as MDA. The specifi city of the TBARS assay was compared with both chromatographic assays for total plasma MDA. The levels of total plasma MDA were signifi cantly lower than the plasma TBARS in each of the samples examined, and interestingly, the interindividual variation apparent in the level of plasma MDA was not evident in the plasma TBARS assay. Each of the four online chromatographic detectors yielded a precise, sensitive, and accurate determination of total plasma MDA, and selected-ion monitoring was the most-accurate assay (101.3%, n = 4). The online diode array detectors provided good assay specifi city (peak purity index of 999), sensitivity, precision, and accuracy. This research demonstrates the inaccuracy that is inherent in plasma TBARS assays, which claim to quantify MDA, and it is proposed that the TBARS approach may limit the likelihood of detecting true differences in the level of lipid peroxidation in clinical studies

Original languageEnglish
Pages (from-to)852-858
Number of pages7
JournalJournal of Lipid Research
Issue number3
Publication statusPublished - Mar 2013
Externally publishedYes


  • Assay specifi city assay bias lipid peroxidation
  • High-performance liquid chromatography
  • Thiobarbituric acid-reactive substance

ASJC Scopus subject areas

  • Biochemistry
  • Endocrinology
  • Cell Biology


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