Feasibility of Study of Empagliflozin in Patients With Autosomal Dominant Polycystic Kidney Disease

Polycystic Kidney, Autosomal Dominant Clinical Trial

Official title:

Feasibility of Study of Empagliflozin in Patients With Autosomal Dominant Polycystic Kidney Disease

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT05510115
• Other study ID #: 22-0616
• Secondary ID: 1R01DK131755-01A
• Status: Recruiting
• Phase: Phase 2
• Start date: November 18, 2022
• Est. completion date: March 31, 2026

Study information

• Verified date: June 2024
• Source: University of Colorado, Denver
• Contact: Michel B Chonchol, MD
• Phone: 303-724-7796
• Email: Michel.Chonchol[@]cuanschutz.edu
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The investigator proposes a pilot randomized clinical trial to determine the safety and tolerability of empagliflozin in ADPKD patients. To achieve this, the investigator will conduct a 12-month parallel-group, randomized, double-blind, placebo-controlled trial in 50 ADPKD patients with an eGFR 30-90 mL/min/1.73m2.

Description:

Autosomal dominant polycystic kidney disease (ADPKD) is characterized by development and continued growth of numerous fluid-filled kidney cysts that result in ultimate loss of kidney function in the majority of individuals. ADPKD manifestations are not limited to the kidney. It is well established that arterial stiffness, an important predictor of future cardiovascular events and mortality, is present early in the course of ADPKD. Sodium-glucose cotransporters-2 inhibitors (SGLT2i) have a track record of tolerability and safety in patients with diabetic and non-diabetic kidney disease. Studies of SGLT2i have been extremely encouraging and the expectation is that these treatments will become standard of care for diabetic and non-diabetic kidney disease; however, the mechanism of action is not fully understood and seems non-specific with regards to disease etiology. The potential benefit of SGLT2i has not been examined in ADPKD, as major trials of SGLT2i in non-diabetic chronic kidney disease (CKD) have excluded patients with ADPKD. It is also important to note the potential benefits of SGLT2i outside of delaying loss of kidney function, as these class of drugs have been shown to provide a mortality benefit for patients across the CKD spectrum. Thus, novel interventions to slow kidney disease progression and reduce vascular morbidity within ADPKD population are of clinical importance.

Limited data suggests SGLT2i may stimulate vasopressin and vasopressin receptor expression by causing glucosuria, natriuresis, and glucose osmotic diuresis, at least in patients and animal models without ADPKD. Vasopressin is known to stimulate cyst growth in ADPKD and promote disease progression. SGLT2i have been studied in animal models of ADPKD, with conflicting data. Some studies in rodent ADPKD models treated with SGLT2i failed to show a significant reduction in cyst growth. However, because of SGLT2i's beneficial effects on kidney function, vascular function, and mortality in non-ADPKD patients with CKD, further investigations of SGLT2i in patients with ADPKD are needed.

Primary Outcome Measure (Aim1): Safety will be assessed by laboratory testing and recording of adverse events. Tolerability will be assessed by subject drop-out rate due to adverse events and the proportion tolerating the maximal dose of study drug. Adherence to the intervention will be assessed by counting the returned number of tablets during check-in visits. Subjects will have check-in visits every 2 weeks the 1st month, monthly on month 2 and 3 and then every 3 months until the end of the study. Subjects will discuss issues with tolerability or treatment-emergent adverse events with a member of the clinical staff who is blinded to treatment status.

Secondary (Exploratory) Outcome Measures (Aim 2): (a) Height-adjusted total kidney volume will be examined by magnetic resonance imaging, at baseline, 3 months and 12 months after treatment with empagliflozin or placebo; (b) Aortic stiffness will be evaluated as aortic pulse wave velocity, at baseline, 3 months and 12 months after treatment with empagliflozin or placebo; (c) Plasma copeptin levels and urinary kidney injury molecule-1 will be measured at baseline, 3 months and 12 months after treatment with empagliflozin or placebo; and (d) Patient related outcomes will be measured using the ADPKD Impact Scale (ADPKD-IS) at baseline, 3 months and 12 months after treatment with empagliflozin or placebo.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 50
• Est. completion date: March 31, 2026
• Est. primary completion date: March 31, 2026
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 55 Years

Eligibility

Inclusion Criteria:

• Autosomal Dominant Polycystic Kidney Disease (ADPKD) as defined by modified Pei-Ravine Criteria;

• Age 18-55 yrs;

• Estimated Glomerular Filtration Rate (eGFR) 30-90 ml/min/1.73m2;

• Mayo imaging-based risk classification 1C, 1D, or 1E;

• Stable renal function over prior 3 months.

Exclusion Criteria:

• Known diabetes mellitus;

• Fasting Glucose >120 mg/dL;

• HbA1C=6.5%;

• Seated systolic blood pressure <100 mm Hg;

• Seated systolic blood pressure >160 mm Hg;

• Known heart failure with reduced ejection fraction (HFrEF);

• Current use of loop diuretic;

• Current use of tolvaptan or other V2 receptor antagonist;

• Current urinary tract or urogenital infection;

• Pregnant or lactating;

• Vascular claudication, lower extremity skin infection or ulcers;

• Contraindication to magnetic resonance imaging (e.g., severe claustrophobia, implanted ferromagnetic device).

Related Conditions & MeSH terms

• Arthrogryposis
• Kidney Diseases
• Polycystic Kidney Diseases
• Polycystic Kidney, Autosomal Dominant

Intervention

Drug:
• Empagliflozin
Empagliflozin: The chemical name of empagliflozin is D-Glucitol,1,5-anhydro-1-C-[4-chloro-3-[[4-[[(3S)-tetrahydro-3furanyl]oxy]phenyl]methyl]phenyl]-, (1S). Empagliflozin is a white to yellowish, non-hygroscopic powder. It is very slightly soluble in water, sparingly soluble in methanol, slightly soluble in ethanol and acetonitrile; soluble in 50% acetonitrile/water; and practically insoluble in toluene. Empagliflozin power will be added in white and bovine origin gelatin capsules. Each capsule of empagliflozin will contain 10 mg or 25 mg of empagliflozin (free base) and the following inactive ingredients: microcrystalline cellulose magnesium, stearate, dicalcium phosphate, and silicone dioxide.
• Placebo
Placebo capsules will be matched in size and color to empagliflozin capsules. Each placebo capsule will contain the following inactive ingredients: microcrystalline cellulose magnesium, stearate, dicalcium phosphate, and silicone dioxide.

Locations

Country	Name	City	State
United States	University of Coloardo Anschutz Medical Campus	Aurora	Colorado

Sponsors (2)

Lead Sponsor	Collaborator
University of Colorado, Denver	University of Maryland

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Adverse Events	Safety will be assessed by recording of adverse events.	12 months
Primary	Subject Drop Out Rate	Tolerability will be assessed by subject drop-out rate due to adverse events and maximal tolerated dose.	12 months
Primary	Returned Number of Tablets	Adherence to the intervention will be assessed by counting the returned number of tablets during check-in visits.	12 months
Secondary	Height-Adjusted Total kidney volume	To assess kidney growth, we will measure change in height-adjusted total kidney volume by magnetic resonance imaging at baseline, 3 months and 12 months.	Baseline, check-in visit (3 months), post-testing (12-months)
Secondary	Aortic Pulse Wave Velocity (aPWV)	A transcutaneous custom tonometer (SphygmoCor XCEL PWA and PWV System; Atcor Medical Inc, Naperville IL) will be positioned at the carotid and femoral arteries and aPWV will be calculated as the distance between recording sites/time between the foot of the carotid and femoral arterial waveforms. Data will be expressed as cm/s.	Baseline, check-in visit (3 months), post-testing (12 months)
Secondary	Mechanistic Biomarkers	Venous blood samples will be analyzed for the following circulating mechanistic biomarker: Plasma copeptin.; Urine samples will be analyzed for the following mechanistic biomarker: Kidney Injury Molecule -1 (KIM-1).	Baseline, check-in visit (3 months), post-testing (12 months)
Secondary	Patient Related Outcomes	The ADPKD Impact Scale (ADPKD-IS) includes 18 items representing 3 distinct domains (physical function, fatigue, and emotional function	12 months