Markers of nitric oxide are associated with sepsis severity: an observational study

Autor: Martin Sebastian Winkler, Stefan Kluge, Maximilian Holzmann, Eileen Moritz, Linda Robbe, Antonia Bauer, Corinne Zahrte, Marion Priefler, Edzard Schwedhelm, Rainer H. Böger, Alwin E. Goetz, Axel Nierhaus, Christian Zoellner
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Critical Care, Vol 21, Iss 1, Pp 1-9 (2017)
Druh dokumentu: article
ISSN: 1364-8535
DOI: 10.1186/s13054-017-1782-2
Popis: Abstract Background Nitric oxide (NO) regulates processes involved in sepsis progression, including vascular function and pathogen defense. Direct NO measurement in patients is unfeasible because of its short half-life. Surrogate markers for NO bioavailability are substrates of NO generating synthase (NOS): L-arginine (lArg) and homoarginine (hArg) together with the inhibitory competitive substrate asymmetric dimethylarginine (ADMA). In immune cells ADMA is cleaved by dimethylarginine-dimethylaminohydrolase-2 (DDAH2). The aim of this study was to investigate whether concentrations of surrogate markers for NO bioavailability are associated with sepsis severity. Method This single-center, prospective study involved 25 controls and 100 patients with surgical trauma (n = 20), sepsis (n = 63), or septic shock (n = 17) according to the Sepsis-3 definition. Plasma lArg, hArg, and ADMA concentrations were measured by mass spectrometry and peripheral blood mononuclear cells (PBMCs) were analyzed for DDAH2 expression. Results lArg concentrations did not differ between groups. Median (IQR) hArg concentrations were significantly lower in patient groups than controls, being 1.89 (1.30–2.29) μmol/L (P
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