Elevated Asymmetric Dimethylarginine Levels Predict Short- And Long-Term Mortality Risk in Critically Ill Patients

J Crit Care. 2013 Dec;28(6):947-53. doi: 10.1016/j.jcrc.2013.05.016. Epub 2013 Aug 14.

Abstract

Objective: Serum concentrations of asymmetric dimethylarginine (ADMA), an endogenous inhibitor of nitric oxide synthase, may contribute to endothelial dysfunction and organ failure in sepsis. We aimed at investigating ADMA levels as a potential diagnostic or prognostic biomarker in critically ill patients.

Methods: Two hundred fifty-five patients (164 with sepsis, 91 without sepsis) were studied prospectively upon admission to the medical intensive care unit (ICU) and on day 7, in comparison to 78 healthy controls. ADMA serum concentrations were correlated with clinical data and extensive laboratory parameters. Patients' survival was followed up for up to 3 years.

Results: ADMA serum levels were significantly elevated in critically ill patients at admission compared to controls. ADMA levels did not differ between patients with or without sepsis, but were closely related to hepatic and renal dysfunction, metabolism and clinical scores of disease severity. ADMA levels further increased during the first week of ICU treatment. ADMA serum levels at admission were an independent prognostic biomarker in critically ill patients not only for short-term mortality at the ICU, but also for unfavorable long-term survival.

Conclusion: Serum ADMA concentrations are significantly elevated in critically ill patients, associated with organ failure and related to short- and long-term mortality risk.

Keywords: ADMA; ICU; Organ failure; Prognosis; Sepsis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Arginine / analogs & derivatives*
  • Arginine / blood
  • Biomarkers / blood
  • Case-Control Studies
  • Critical Illness / mortality*
  • Female
  • Humans
  • Intensive Care Units
  • Male
  • Middle Aged
  • Multiple Organ Failure / blood
  • Multiple Organ Failure / mortality
  • Predictive Value of Tests
  • Prognosis
  • Prospective Studies
  • Risk Factors
  • Sepsis / blood
  • Sepsis / mortality
  • Severity of Illness Index
  • Survival Rate

Substances

  • Biomarkers
  • N,N-dimethylarginine
  • Arginine