An observational study in Ureteropelvic Junction Obstruction and Chronic Kidney Diseases, sponsored by University of Campania Luigi Vanvitelli. Recruiting at 5 sites in Italy. Open to participants aged 1 Day to 5 Years. Per ClinicalTrials.gov, last updated 2024-04-30.
Sponsored by University of Campania Luigi Vanvitelli · Observational
The goal of this observational study is to learn about specific biomarkers of unilateral ureteropelvic junction obstruction (UPJO) in children undergoing surgical intervention for unilateral UPJO compared with controls. The main question it aims to answer are:
Congenital anomalies of the kidney and urinary tract (CAKUT) are the main cause of chronic kidney disease in children. UPJO is the most common CAKUT. It is defined as impeded urine outflow from the renal pelvis to the ureter, which may result in progressive kidney damage (KD). Renal imaging is the current diagnostic approach, even if substantial shortcomings are present to reliably determine a significant obstruction. Consequently, a follow up is often needed with the risk of progressive KD. The main hypothesis of this proposal is that biofluids (whole blood and urine) could allow a more precise diagnosis and risk stratification of unilateral UPJO compared with the available diagnostic techniques.
In this project the investigators define the UPJO as an hydronephrosis needing of surgical correction according to 2 of the following criteria: anterior-posterior diameter of the pelvis (APDP) ≥ 30 mm, split renal function (SRF) \< 40% at the Tc99mMag3 scintigraphy (Mag3S), SRF with delta > 10% at follow-up Mag3S, delayed wash-out, progressive increase of the APDP at follow-up ultrasounds, and 4th degree hydronephrosis.
The investigators will extensively investigate for specific biomarkers of UPJO at different levels. The investigators will focus 1. on the urine by investigating for intrarenal remodeling processes and searching for kidney-specific biomarkers by urinary single-cell and EVs screening (aim 1). Moreover, based on the hitherto revealed capability of blood cells to perceive organ-specific illnesses, 2. the investigators will perform WBGEP of babies with unilateral UPJO to identify early biomarkers of disease progression (aim 2).
For the aims 1 and 2, the investigators will enroll 85 patients aged 0-5 years, 35 with unilateral UPJO and 50 controls without hydronephrosis needing surgical correction for hernia, hydrocele or phimosis.
This project could improve the management of patients with suspect of UPJO -starting from birth- by a better understanding of the pathophysiological mechanisms underlying KD and by the identification of early biomarkers of obstruction, reducing the costs and the complications related to either a tardive or not needed surgical correction and reducing the risk of KD development.
26 studies on the registry are indexed under Multicystic renal dysplasia, bilateral; 9 are open to participants now.
Browse Multicystic renal dysplasia, bilateral studies →University of Campania Luigi Vanvitelli is the lead sponsor of 174 studies on the registry; 28 are open to participants now.
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Definition of cases (patients with UPJO): in this project, the investigators define the UPJO as an hydronephrosis needing of surgical correction on the basis of at least 2 of the following criteria: APDP ≥ 30 mm, SRF less than 40% at the Mag3S, SRF with delta > 10% at follow-up Mag3S compared with the first Mag3S, delayed wash-out following diuretic administration, progressive increase of the APDP at follow-up kidney ultrasounds, 4th degree hydronephrosis. Otherwise, the hydronephrosis will be defined as non-obstructive.
Definition of controls: babies aged 0-5 years and needing of surgical correction for hernia, hydrocele or phimosis.
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Exclusion Criteria:
Children aged 0-5 years with unilateral UPJO. Unilateral UPJO will be defined as an hydronephrosis needing of surgical correction on the basis of at least 2 of the following criteria: APDP ≥ 30 mm, SRF less than 40% at the Mag3S, SRF with delta \> 10% at follow-up Mag3S compared with the first Mag3S, delayed wash-out following diuretic administration, progressive increase of the APDP at follow-up kidney ultrasounds, 4th degree hydronephrosis.
Diagnostic Test: Identification of Diagnostic Biomarkers
Children aged 0-5 years needing of surgical correction for hernia, hydrocele, phimosis or cryptorchidism.
Diagnostic Test: Identification of Diagnostic Biomarkers
Urinary single-cell and EVs screening to stage the intrarenal injury and repair processes in UPJO babies and identification of the whole blood gene expression profiling of babies with unilateral UPJO. Data deriving from patients with unilateral UPJO will be compared with data deriving from controls.
Urine Biomarkers
The investigators will focus on the urine by investigating for intrarenal remodeling processes and searching for kidney-specific biomarkers by urinary single-cell and EVs screening (aim 1).
Time frame: 48 months
Blood Biomarkers
Moreover, based on the hitherto revealed capability of blood cells to perceive organ-specific illnesses, the investigators will perform WBGEP of babies with unilateral UPJO to identify early biomarkers of disease progression (aim 2).
Time frame: 48 months
Not enrolling at this site.
Plan to share: No
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