Title:Oxidative Stress Biomarkers in Coronary Artery Disease
Volume: 23
Issue: 22
Author(s): Spyridon Simantiris*, Charalampos Papastamos, Alexios S. Antonopoulos, Panagiotis Theofilis, Marios Sagris, Martha Bounta, Georgia Konisti, Nikolaos Galiatsatos, Anna Xanthaki, Konstantinos Tsioufis and Dimitris Tousoulis
Affiliation:
- 1st Cardiology Department, Hippokration Hospital, National and Kapodistrian University of Athens, Greece
Keywords:
Oxidative stress, Coronary artery disease, Biomarkers, Lipid peroxidation, Malondialdehyde, F2-isoprostanes, myeloperoxidase, Oxidized low-density lipoprotein.
Abstract: Oxidative stress plays a central role in atherogenesis, implicated in endothelial dysfunction,
coronary plaque formation, and destabilization. Therefore, identifying oxidative stress in the
vascular wall by reliable biomarkers could aid in early diagnosis and better coronary artery disease
(CAD) prognostication. Because of the short half-life of reactive oxygen species, the current approach
is to measure stable products generated by the oxidation of macromolecules in plasma or
urine. Most popular oxidative stress biomarkers are oxidized low-density lipoprotein, myeloperoxidase
and lipid peroxidation biomarkers, such as malondialdehyde and F2-isoprostanes. Oxidative
protein modification biomarkers and oxidized phospholipids have also been studied and discussed
in the present review. Most of these biomarkers are associated with the presence and extent of
CAD, are elevated in patients with acute coronary syndromes, and may predict outcomes independent
of traditional CAD risk factors. However, further standardization of measurement methods and
assessment in large randomized clinical trials are required to integrate these biomarkers into clinical
practice. In addition, evidence that these biomarkers detect oxidative stress in the vascular wall
lacks and more specific biomarkers should be developed to identify vascular oxidative stress. Consequently,
several oxidative stress biomarkers have been developed, most of which can be associated
with the presence and extent of CAD and event prognosis. However, they still have significant
limitations that hinder their integration into clinical practice.