A novel immunoassay for malondialdehyde-conjugated low-density lipoprotein measures dynamic changes in the blood of patients undergoing coronary artery bypass graft surgery

Samata S. Pandey, Adam Hartley, Mikhail Caga-Anan, Tareq Ammari, Ameer Hamid Ahmed Khan, Bao Anh Vu Nguyen, Chiari Kojima, Jon Anderson, Steven Lynham, Michael Johns, Dorian O. Haskard, Ramzi Y. Khamis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Oxidized low-density lipoproteins play an important role in tissue pathology. In this study, we report a sensitive novel enzyme-linked immunosorbent assay for the detection of malondialdehyde-modified low-density lipoprotein (MDA-LDL), a key component of oxidized LDL. The assay is capable of measuring a variable presence of MDA-LDL within human plasma and serum. We demonstrate the robust nature of the assay on samples stored for over 20 months, as well as high inter-operator reproducibility (r = 0.74, p < 0.0001). The assay was capable of detecting dynamic changes in patient blood samples after coronary artery bypass graft surgery, indicating synthesis or release of MDA-LDL with the oxidative stress of surgery, followed by homeostatic clearance. This robust, sensitive and specific assay for circulating MDA-LDL will serve as a valuable translational tool for the improved detection of oxidative forms of LDL in response to a range of physiological or pathological stimuli, with potential clinical applicability.

Original languageEnglish
Article number1298
JournalAntioxidants
Volume10
Issue number8
DOIs
Publication statusPublished - Aug 2021

Keywords

  • Anti-oxidized LDL antibodies
  • Antibodies
  • Assay
  • Atherosclerosis
  • Inflammation
  • Low-density lipoprotein (LDL), oxidized LDL
  • Malondialdehyde

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