This study aims to better understand electrolyte handling in patients with autosomal dominant polycystic kidney disease treated with the SGLT2 inhibitor Empagliflozin. Patients will be randomized into two groups and take Empagliflozin or a Placebo for 2 weeks with a wash-out period of 2 weeks. The primary outcome is tubular handling of the divalent ions calcium, phosphate and magnesium. Secondary outcomes include diuresis, safety and tolerability.
This investigator-initiated randomised, single-blind, placebo-controlled cross-over study aims to better understand tubular electrolyte handling of divalent ions in patients with autosomal dominant polycystic kidney disease treated with the SGLT2 inhibitor Empagliflozin. After randomization, at week 0, participants collect 24-hour urine sample and a patient visit to assess vitals and blood tests takes place. After this visit, period 1 starts with a 2-week treatment of either Empagliflozin 10mg or Placebo. At week 2, the second 24-hour-urine sample and 2. patient visit and blood test take place. After this visit, wash-out period for 2 weeks starts where no study drug will be administered At week 4, the period 2, the crossover-period starts for an additional 2 weeks. At week 6; a final and third 24-hour urine sample, clinical visit and blood test takes place. At week 3 \& 7, a phone consultation will assess safety.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
40
Empagliflozin 10mg
Placebo capsule
University Hospital Zurich, Division of Nephrology
Zurich, Canton of Zurich, Switzerland
RECRUITINGCantonal Hospital Graubuenden
Chur, Kanton Graubünden, Switzerland
RECRUITINGPrimary Outcome
\- Calcium, phosphate, magnesium excretion
Time frame: After a two week intervention
Secondary Outcome
\- diuresis (24-hour urine volume, 24-hour creatinine, ketonuria, osmolarity, urinary pH) - tubular handling of other electrolytes (Na, K, Cl) - inflammation metabolism (CRP, hemoglobin?) - kidney function (creatinine, uric acid, urea, hemoglobin?) - effect on standardized blood pressure (assessed every two weeks) - bone metabolism (FGF23, PTH, 25-(OH)-D3) - tolerability (patient-reported side effects (nycturia, urinary urgency, lightheadedness, syncope) - safety (bacteriuria, urinary tract infection requiring antibiotic treatment, genital mycosis)
Time frame: After a two week intervention
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