The concentration of leptin and apelin in HT-OB children was significantly higher than in the C and HT-NW group. A similar finding for leptin level was demonstrated in comparison of HT-NW with C group. In children with HT-OB, the lack of decline in nocturnal DBP was associated with significantly higher BMI and the Cole's Index value. Children with HT-OB and lack of decline in nocturnal SBP showed lower leptin and insulin concentrations, and lower values of HOMA-IR as compared with dipping children. Positive correlation in the whole study group was found between adipokines levels and BP measurements. In conclusion, children with primary HT show higher concentration of adipokines compared with their healthy peers. The data on relationship of serum adipokines levels with anthropometric and BP parameters in children may be helpful to clarify the sequence of disturbances in the cardiovascular system in adults, which requires further examination.

Background. Renal cysts, according to their etiology, can be divided into genetic and acquired cysts. This is of great importance in patients with cystic kidney disease with a possible poor prognosis to identify markers of early kidney damage. Objectives. The objective of this study was to evaluate the concentration of serum and urine liver-type fatty acid binding protein (L-FABP) and interleukin 6 (IL-6) in children with kidney cysts. Material and methods. The study was conducted on a group of 39 children with kidney cysts including 20 subjects with autosomal dominant polycystic kidney disease (ADPKD). Results. Serum and urine L-FABP concentration in children with renal cysts was significantly higher compared to the controls, regardless of the underlying type of cystic degeneration, number of cysts and gender. Also, serum and urinary IL-6 concentration was significantly higher than in the control group. There was a significant negative correlation between serum L-FABP concentration and standard deviation score (SDS) for diastolic blood pressure (DBP). A significant negative correlation was found between serum IL-6 concentration and systolic blood pressure (SBP), DBP and mean arterial pressure (MAP) values as well as SDS for SBP and DBP. In addition, a significant positive correlation was found between urinary IL-6 concentration and estimated glomerular filtration rate (eGFR). Conclusions. Higher concentration of L-FABP in serum and urine in children with kidney cysts indicates the early damage to the renal parenchyma, detectable before the onset of hypertension and other organ damage. Significantly higher serum and urinary IL-6 levels in children with cystic kidney disease compared to healthy children may suggest the role of this cytokine in chronic kidney disease development.

Background: The most common disease associated with the presence of kidney cysts in the population is autosomal dominant polycystic kidney disease (ADPKD), which finally leads to end-stage renal disease. Method: The study evaluated serum and urinary concentration of angiotensinogen (AGT) and interleukin 18 (IL-18) in a group of 39 children with renal cysts of different aetiology. Results: Serum and urinary AGT concentration in children with renal cysts was higher compared to controls, regardless of the underlying background and gender. Serum IL-18 concentration was lower, in contrast, and the concentration of IL-18 in the urine did not differ between affected and healthy children. Negative correlation between urinary IL-18 concentration and systolic and mean arterial blood pressure was noted. Conclusions: Higher AGT levels in serum and urine in children with renal cysts may indicate the activation of the renin–angiotensin–aldosterone system, including its intrarenal part, even before the onset of hypertension. Lower serum concentration of IL-18 in children with kidney cysts may indicate the loss of the protective role of this cytokine with the occurrence of hypertension.

W S T Ę P:Aktualnie nie posiadamy wiarygodnych danych dotyczących epidemiologii kamicy układu moczowego w populacji dzieci i młodzieży w Polsce. Wydaje się, że staje się ona chorobą cywilizacyjną i jest coraz częściej rozpoznawana w populacji pediatrycznej. Przyczyn tego zjawiska doszukuje się w zmieniających się nawykach żywie-niowych, braku aktywności fizycznej, epidemii otyłości a nawet globalnym ociepleniu klimatu. M A T E R I A Ł I M E T O D Y:Artykuł przedstawia wyniki retrospektywnej analizy grupy dzieci hospitalizowanych z powodu kamicy układu moczowego oraz metabolicznej predyspozycji do tworzenia się złogów w układzie moczowym, przeprowadzonej w latach 2010-2013 na Oddziale Nefrologii Dzieci Samodzielnego Publicznego Szpitala Klinicznego nr 1 w Zabrzu. Oceny dokonano pod kątem częstości występowania poszczególnych metabolicznych czynników ryzyka oraz ich związku z obrazem ultrasonograficznym. W Y N I K I I W N I O S K I:Grupa dzieci z podejrzeniem kamicy dróg moczowych lub stanu metabolicznej predyspozycji do rozwoju kamicy charakteryzuje się dużą różnorodnością zaburzeń biochemicznych sprzyjających krystalizacji złogów w drogach moczowych. Zaskakujące jest spostrzeżenie o braku powiązań pomiędzy nasileniem zmian o charakterze kamicy w badaniu ultrasonograficznym a zaburzeniami biochemicznymi potencjalnie predysponującymi do tworzenia się złogów. Obraz wapnicy nerek w badaniu ultrasonograficznym wykazuje natomiast wyraźny związek z hiperkalciurią. Pierwotne zaburzenie funkcji przytarczyc oraz przedawkowanie witaminy D rzadko stanowią wyjaśnienie przyczyny kamicy układu moczowego. S Ł O W A K L U C Z O W Ekamica układu moczowego, dzieci, hiperkalciuria, nefrokalcynoza

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