Open Access Short Report

Neutrophil gelatinase-associated lipocalin in dehydrated patients: a preliminary report

Constantine N Antonopoulos*, Alexandros Kalkanis, Georgios Georgakopoulos, Theodoros N Sergentanis and Dimitrios N Rigopoulos

Author Affiliations

Department of Internal Medicine, 401 General Army Hospital, Athens, Greece

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BMC Research Notes 2011, 4:435  doi:10.1186/1756-0500-4-435

Published: 22 October 2011



Acute kidney injury has been recognized as a major contributor to end stage renal disease. Although neutrophil gelatinase-associated lipocalin (Ngal) has been reported as a promising biomarker for early detection of acute kidney injury, no study has yet examined its potential clinical impact in patients with normal renal function. The purpose of current study is to investigate possible difference in serum Ngal levels between dehydrated and control patients.


A total of twelve patients presented with symptoms of mild dehydration defined by history of diarrheas or vomiting and orthostatic (postural) hypotension and an age and sex matched group of twelve control patients were included. The two groups of patients did not seem to differ in basic clinical and laboratory parameters. Serum Ngal was higher in dehydrated patients when compared to control group (Ngal = 129.4 ± 25.7 ng/mL vs 60.6 ± 0.4 ng/mL, p = 0.02). Ngal was not correlated with age, hemoglobin, white blood cell count, red blood cell count, urea or creatinine.


The presence of elevated Ngal levels in dehydrated patients may suggest its role as a very sensitive biomarker in even minimal and "silent" prerenal kidney dysfunction

dehydration; Neutrophil Gelatinase-Associated Lipocalin; Ngal; biomarker; acute kidney injury