RecruitingNot ApplicableNCT07020104

The Role of Skin Sodium Accumulation in Chronic Kidney Disease


Sponsor

Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)

Enrollment

60 participants

Start Date

Jan 7, 2025

Study Type

INTERVENTIONAL

Conditions

Summary

This project consists of four substudies: a cohort study (A) and a sodium intake intervention (B) and a sodium excretion intervention (C) and a water intervention study (D). The main objective of the cohort study (A) is to investigate the prognostic implications of tissue sodium accumulation in CKD patients. The primary objective of the sodium intervention studies is to study the effect of high and low sodium intake (B) and increased renal sodium excretion (C) on tissue sodium content. The main objective of the water intervention study (D) is to investigate the effect of increased and habitual water intake on tissue sodium content and transepidermal water loss.


Eligibility

Min Age: 18 Years

Plain Language Summary

Simplified for easier understanding

This study is investigating whether sodium (salt) builds up in the skin of people with chronic kidney disease, and testing whether reducing sodium intake or increasing water intake can help lower blood pressure and slow kidney decline. **You may be eligible if...** - You have chronic kidney disease (CKD) with moderately reduced kidney function (eGFR 15–60) - Your blood pressure medications have been stable for the past 6 weeks - For the water intervention: your kidney function is more severely reduced (eGFR 15–29) and you have high blood pressure **You may NOT be eligible if...** - You are under 18 - You are expected to start dialysis or receive a kidney transplant within 3 months - You have active nephrotic syndrome (a kidney condition causing significant protein loss) - You have another severe illness that would interfere with the study Talk to your doctor to see if this trial is right for you.

This summary was AI-generated to explain the trial in plain language. It is not medical advice. Always discuss eligibility with your doctor before enrolling in a clinical trial.

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Interventions

DRUGHydrochlorothiazide

Each patient will receive 1 tablet of hydrochlorothiazide 12.5mg once a day for the first 3 weeks of the drug cycle. If clinical and biochemical parameters allow, the dosage is doubled to 2 tablets of hydrochlorothiazide 12.5mg once daily for the following 3 weeks. If the laboratory results and clinical parameters do not allow dose intensification, the initial dosage will be continued during the second half of the drug cycle.

DRUGSpironolactone

Each patient will receive 1 tablet of spironolacton 12.5mg once a day for the first 3 weeks of the drug cycle. If clinical and biochemical parameters allow, the dose is doubled to 2 tablets of spironolacton 12.5mg once daily for the following 3 weeks. If the laboratory results and clinical parameters do not allow dose intensification, the initial dosage will be continued during the second half of the drug cycle.

DRUGLercanidipine

Each patients will receive 1 tablet of lercanidipine 10mg once a day for the first 3 weeks of the drug cycle. If clinical and biochemical parameters allow, the dose is doubled to 2 tablets of lercanidipine 10mg once daily for the following 3 weeks. If the laboratory results and clinical parameters do not allow dose intensification, the initial dosage will be continued during the second half of the drug cycle.

DIETARY_SUPPLEMENTHigh sodium dietary intake (>200mmol/l)

The patients will receive a 2-week high sodium diet. The patients will receive dietary advice to achieve this goal of \>200mmol/l sodium (\>12g salt) intake per day.

DIETARY_SUPPLEMENTLow sodium dietary intake (<50mmol/l)

The patients will receive a 2-week low sodium diet. The patients will receive dietary advice to achieve this goal of \<50mmol/l sodium (\<3g salt) intake per day.

DIETARY_SUPPLEMENTHigh water intake

During the increased water intake period, the patients will be instructed to drink 1 L more than their mean 24-hour urine volume at screening and baseline.

DIETARY_SUPPLEMENTHabitual water intake

During this part of the intervention, the patients will be instructed to maintain their habitual water intake.


Locations(1)

Amsterdam UMC

Amsterdam-Zuidoost, North Holland, Netherlands

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NCT07020104


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