Title:Asymmetric Dimethylarginine as a Biomarker in Coronary Artery Disease
Volume: 23
Issue: 6
Author(s): Nikolaos Papageorgiou, Panagiotis Theofilis*, Evangelos Oikonomou, George Lazaros, Marios Sagris and Dimitris Tousoulis
Affiliation:
- 1st Cardiology Department, Hippokration General Hospital, University of Athens Medical School, Athens, Greece
Keywords:
Asymmetric dimethylarginine, Atherosclerosis, Coronary artery disease, Endothelial dysfunction, Arterial hypertension, Revascularization.
Abstract: As atherosclerosis remains a leading cause of morbidity and mortality worldwide despite
the advances in its medical and interventional management, the identification of markers associated
with its incidence and prognosis constitutes an appealing prospect. In this regard, asymmetric dimethylarginine
(ADMA), a well-studied endogenous endothelial nitric oxide synthase inhibitor, represents
a core mediator of endothelial dysfunction in atherosclerotic diseases. Given the pathophysiologic
background of this molecule, its importance in the most frequent atherosclerotic manifestation,
coronary artery disease (CAD), has been extensively studied in the past decades. The available
evidence suggests elevation of ADMA in the presence of common cardiovascular risk factors,
namely diabetes mellitus, arterial hypertension, and hypertriglyceridemia, being related to endothelial
dysfunction and incident major adverse cardiovascular events in these groups of patients. Moreover,
ADMA is associated with CAD occurrence and severity, as well as its prognosis, especially in
populations with renal impairment. Interestingly, even in the absence of obstructive CAD, increased
ADMA may indicate coronary endothelial dysfunction and epicardial vasomotor dysfunction, which
are prognostication markers for incident cardiovascular events. In the case of acute coronary syndromes,
high ADMA levels signify an augmented risk of incomplete ST-segment elevation resolution
and poorer prognosis. Abnormal ADMA elevations may indicate adverse outcomes following
percutaneous or surgical coronary revascularization, such as in-stent restenosis, graft patency, and
hard cardiovascular endpoints. Finally, since its association with inflammation is significant, chronic
inflammatory conditions may present with coronary endothelial dysfunction and subclinical coronary
atherosclerosis by means of increased coronary artery calcium, with augmented ADMA acting
as a biomarker.