[Utility of urine levels of interleukins in the diagnosis of vesicoureteral reflux: a case-control study in children]. / Utilidad de los niveles urinarios de interleuquinas en el diagnóstico del reflujo vésico-ureteral: estudio de casos y controles en niños.

UNLABELLED: Invasive imaging methods that require catheterization are used for the diagnosis of vesicoureteral reflux. Our aim is to assess the usefulness of interleukin urinary levels for the diagnosis of reflux in children without urinary tract infection. METHODS: Case-control study in children who underwent a voiding cystourethrogram: forty cases diagnosed of reflux and 80 controls. Concentrations of IL-1beta, IL-6 and IL-8 related to creatinine levels (pg/micromol) were determined in urine samples in all. RESULTS: Sixty-two patients were males and fifty-eight females, with a mean age of 2.4 years. Indications for cystography were previous urinary tract infection in 78 cases (65%), prenatal diagnosis in 24 cases (20%) and postnatal diagnosis of uropathy or family history in 18 cases (15.1%). No significant differences were observed between cases and controls in IL-1beta/creatinine and IL-6/creatinine levels. However, IL-8/creatinine levels were almost significant higher in case group (median 3.5 pg/micromol; SD 9.2) than in control group (median 1.54 pg/micromol; SD 3) (P=0.001). The odds ratio was 5.57 (CI95%: 1.51 a 20.60) (X(MH)=2.80; p=0.005). CONCLUSIONS: Urinary levels of IL-8/creatinine are elevated in children with vesicoureteral reflux, even in absence of urinary tract infection. It could be used as a non-invasive marker for detection of subclinical cases of disease.

Utilidad de los niveles urinarios de interleuquinas en el diagnóstico del refl ujo vésico-ureteral: estudio de casos y controles en niños / Utility of urine levels of interleukins in the diagnosis of vesicoureteral reflux: a case-control study in children

En el diagnóstico del reflujo vésico-ureteral se emplean métodos de imagen invasivos que requieren sondajes. Nuestro objetivo es evaluarla utilidad de los niveles urinarios de interleuquinas en el diagnóstico del reflujo en niños sin infección urinaria en curso. Métodos. Estudio de casos y controles en niños que acuden a realizar una cistouretrografía miccional (CUMS): 40 casos con reflujo y80 controles. Se determinó en todos la concentración en orina de IL-1,IL-6 e IL-8 en relación con la creatinina. Resultados. 62 niños y 58 niñas, con 2,4 años de edad media. La CUMS se indicó por infección urinaria previa en 78 (65%), hallazgos prenatales en 24 (20%) y diagnóstico postnatal de uropatía o historia familiar en 18 (15,1%). No se han observado diferencias significativas en los niveles urinarios de IL-1/creatinina e IL-6/creatinina entre ambos grupos; sin embargo, los niveles de IL-8/creatinina fueron significativamente más altos en los casos (media 3,5 pg/μmol; SD 9,2) que en los controles (media 1,54 pg/μmol; SD 3) (p=0,001). La odds ratio fue de5,57 (IC 95%: 1,51 a 20,60) (XMH=2,80; p=0,005).Conclusiones. Los niveles urinarios de IL-8/creatinina están elevados en niños con reflujo, incluso en ausencia de infección. Estos podrían utilizarse como biomarcador no invasivo para la detección de los casos subclínicos de enfermedad (AU)

Invasive imaging methods that require catheterization are used for the diagnosis of vesicoureteral refl ux. Our aim is to assess the usefulness of interleukin urinary levels for the diagnosis of reflux in children without urinary tract infection. Methods. Case-control study in children who underwent a voiding cystourethrogram: forty cases diagnosed of refl ux and 80 controls. Concentrations of IL-1, IL-6 and IL-8 related to creatinine levels (pg/μmol) were determined in urine samples in all. Results. Sixty-two patients were males and fi fty-eight females, with a mean age of 2.4 years. Indications for cystography were previousurinary tract infection in 78 cases (65%), prenatal diagnosis in 24 cases(20%) and postnatal diagnosis of uropathy or family history in 18 cases(15.1%). No significant differences were observed between cases and controls in IL-1/creatinine and IL-6/creatinine levels. However, IL-8/creatinine levels were almost significant higher in case group (median3.5 pg/μmol; SD 9.2) than in control group (median 1.54 pg/μmol; SD 3)(P=0.001). The odds ratio was 5.57 (CI 95%: 1.51 a 20.60) (XMH=2.80;p=0.005).Conclusions. Urinary levels of IL-8/creatinine are elevated in children with vesicoureteral reflux, even in absence of urinary tractinfection. It could be used as a non-invasive marker for detection of subclinical cases of disease (AU)