Urinary Tubular Biomarkers for Chronic Kidney Disease
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Urinary tubular test panel.
- Who it may be relevant to
- Registry conditions: Chronic Kidney Disease Stage 3. Basic parameters: from 18 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Netherlands
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Overview
Currently used tests for chronic kidney injury only assess the function of one part of the kidney: the filter called the glomerulus. The other part, called the tubule, is disregarded. Based on many previous studies, the investigators have good reason to assume that a better prediction of the course of chronic kidney disease by testing tubular function will be possible. This is important, for example, when patients need to be treated with kidney-protecting drugs.
Detailed description
Rationale Chronic kidney disease (CKD) is a common and progressive condition that affects over 800 million people worldwide and is now one of the leading causes of mortality. The kidney consists of filters and tubules, but diagnosis of progressive CKD is currently based on filter function alone (estimated glomerular filtration rate (eGFR) and albuminuria). However, it is tubular injury that drives CKD progression, and it is the tubule that is targeted by recently developed kidney-protective treatments. We hypothesize that a high-throughput tubular test panel, consisting of urine supersaturation and urinary extracellular vesicle (uEV) biomarkers, improves the prediction of CKD progression thereby enabling the early initiation of kidney-protective treatment.
Objective(s) To develop a high-throughput tubular test panel, consisting of urine supersaturation and uEV biomarkers, that improves the prediction of CKD progression.
Study type Prospective diagnostic trial.
Study population Adult patients with CKD stage G3 (eGFR 30-59 ml/min/1.73 m2).
Methods Urine samples are already collected as part of the standard of care and will be divided for measurement of albuminuria (standard of care) and urine supersaturation and uEV biomarkers (this project). The performance of the tubular test panel will be analyzed by comparing it to that of the existing Kidney Failure Risk Equation.
Burden and risks The diagnostic tests will be performed on a urine sample that is already collected as part of routine clinical care. Therefore, these diagnostic procedures do not pose an additional risk or burden.
Recruitment and consent Participants will be recruited from the Department of Internal Medicine outpatient clinics. For all study participants written informed consent will be obtained. The informed consent will include the approval (yes/no) to store samples for secondary use.
Interventions
- Diagnostic test Urinary tubular test panel
The urinary tubular test panel will be applied to urine samples that are collected as part of the routine outpatient follow-up. Its predictive power for CKD progression will be assessed. The results of the tubular test panel will not influence the treatment of the patients. They will remain under standard outpatient treatment throughout the study.
Primary outcome measures
- CKD Progression [Time frame: 3 years]
Eligibility criteria
Inclusion criteria
- Chronic kidney disease stage 3 (eGFR 30-59ml/min)
Exclusion criteria
- Active glomerulonephritis treated with immunosuppression
- Kidney transplant recipient
- Current treatment with chemo- or immunotherapy for malignancy
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Observational model
- Cohort
Study locations
Netherlands · 1 center
- Erasmus MC — Rotterdam
Identifiers
NCT: NCT06732349 · MEC-2024-0505 - U-Tube 1