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The issue of plasma asymmetric dimethylarginine reference range - A systematic review and meta-analysis.


ABSTRACT: BACKGROUND:Asymmetric dimethylarginine (ADMA) is an endogenous inhibitor of nitric oxide synthase, marker and mediator of endothelial dysfunction. Several studies have demonstrated its value in cardiovascular risk stratification and all-cause mortality prediction. The aim was to determine the reference range of plasma ADMA in healthy adults. METHODS AND RESULTS:Taking into account the most widely used ADMA measurement methods, only studies using either high performance liquid chromatography (HPLC) -with fluorescence or mass spectrometric detection-, or enzyme-linked immunosorbent assay (ELISA) to quantify plasma ADMA concentrations were enrolled. 66 studies were included in the quantitative analysis (24 using ELISA and 42 using HPLC) reporting a total number of 5528 non-diabetic, non-hypertensive, non-obese adults without any medication (3178 men and 2350 women, 41.6 ± 16.9 years old). The reference range of ADMA (in ?mol/l with 95% confidence interval in parenthesis) was 0.34 (0.29-0.38)- 1.10 (0.85-1.35) with a mean of 0.71 (0.57-0.85) (n = 4093) measured by HPLC and 0.25 (0.18-0.31)- 0.92 (0.76-1.09) with a mean of 0.57 (0.48-0.66) (n = 1435) by ELISA. CONCLUSIONS:Numerous publications suggested that asymmetric dimethylarginine is not only an outstanding tool of disease outcome prediction but also a new potential therapeutic target substance; the reference range provided by this meta-analysis can become of great importance and aid to further investigations. However, developing a standard measurement method would be beneficial to facilitate the clinical usage of ADMA.

SUBMITTER: Nemeth B 

PROVIDER: S-EPMC5426758 | BioStudies | 2017-01-01

REPOSITORIES: biostudies

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