Format

Send to

Choose Destination
See comment in PubMed Commons below
PLoS One. 2011 Feb 18;6(2):e17260. doi: 10.1371/journal.pone.0017260.

Asymmetric dimethylarginine, endothelial nitric oxide bioavailability and mortality in sepsis.

Author information

1
International Health Division, Menzies School of Health Research and Charles Darwin University, Darwin, Northern Territory, Australia. Joshua.Davis@menzies.edu.au

Abstract

BACKGROUND:

Plasma concentrations of asymmetric dimethylarginine (ADMA), an endogenous inhibitor of nitric oxide synthase, are raised in patients with chronic vascular disease, causing increased cardiovascular risk and endothelial dysfunction, but the role of ADMA in acute inflammatory states is less well defined.

METHODS AND RESULTS:

In a prospective longitudinal study in 67 patients with acute sepsis and 31 controls, digital microvascular reactivity was measured by peripheral arterial tonometry and blood was collected at baseline and 2-4 days later. Plasma ADMA and L-arginine concentrations were determined by high performance liquid chromatography. Baseline plasma L-arginine: ADMA ratio was significantly lower in sepsis patients (median [IQR] 63 [45-103]) than in hospital controls (143 [123-166], p<0.0001) and correlated with microvascular reactivity (r = 0.34, R(2) = 0.12, p = 0.02). Baseline plasma ADMA was independently associated with 28-day mortality (Odds ratio [95% CI] for death in those in the highest quartile (≥ 0.66 µmol/L) = 20.8 [2.2-195.0], p = 0.008), and was independently correlated with severity of organ failure. Increase in ADMA over time correlated with increase in organ failure and decrease in microvascular reactivity.

CONCLUSIONS:

Impaired endothelial and microvascular function due to decreased endothelial NO bioavailability is a potential mechanism linking increased plasma ADMA with organ failure and death in sepsis.

PMID:
21364995
PMCID:
PMC3041798
DOI:
10.1371/journal.pone.0017260
[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Public Library of Science Icon for PubMed Central
    Loading ...
    Support Center