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Renal tubular function and urinary N-acetyl-beta-d-glucosaminidase and kidney injury molecule-1 levels in asthmatic children

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Date
2016-12-01
Authors
DEMIR, Aysegul Dogan
GOKNAR, Nilufer
OKTEM, Faruk
Ozkaya, EMİN
Yazici, MEBRURE
Torun, EMEL
Vehapoglu, Aysel
KUCUKKOC, Mehmet
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Abstract
Background: Asthma is a chronic inflammatory disorder of the airways which results in chronic hypoxia. Chronic hypoxia and inflammation can affect renal tubular function. Objectives: The aim of this study was to investigate renal tubular function and early kidney injury molecules such as urinary N-acetyl-betaglucosaminidase (NAG) and kidney injury molecule-1 (KIM-1) excretion in children with asthma. Methods: Enrolled in the study were 73 children diagnosed with asthma and 65 healthy age- and gender-matched control subjects. Urine pH, sodium, phosphorus, potassium, microalbumin, creatinine, NAG, KIM-1, and serum creatinine, sodium, phosphorus were evaluated. The diagnosis of asthma and classification of mild or moderate were done according to the Global Initiative for Asthma guidelines. Results: Serum sodium, phosphorus, creatinine, and urinary microalbumin were within normal levels in the both groups. Urinary pH, sodium, potassium, phosphorus, microalbumin, and KIM-1 excretions were similar between the control and study groups. Tubular phosphorus reabsorption was within normal limits in two groups. Urine NAG was elevated in the study group (P = 0.001). Urinary KIM-1 and NAG levels were positively correlated (r = 0.837; P = 0.001). When children with mild and moderate asthma were compared, all of the parameters were similar (P >0.05). Conclusions: This study showed that chronic asthma can lead to subtle renal impacts. We suggest that in children with asthma, urinary NAG level is a more valuable parameter to show degree of renal tubular injury than markers such as microalbumin and KIM-1. Chronic hypoxy and inflammation probably contributes to these subclinical renal effects.
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DEMIR A. D. , GOKNAR N., OKTEM F., Ozkaya E., Yazici M., Torun E., Vehapoglu A., KUCUKKOC M., -Renal tubular function and urinary N-acetyl-beta-d-glucosaminidase and kidney injury molecule-1 levels in asthmatic children-, INTERNATIONAL JOURNAL OF IMMUNOPATHOLOGY AND PHARMACOLOGY, cilt.29, ss.626-631, 2016
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