Phase II Study of Zibotentan and Dapagliflozin Combination Versus Dapagliflozin Alone for Adults With Chronic Kidney Disease and High Proteinuria

What this Trial Is About

Researchers are studying adult participants with chronic kidney disease CKD who have high protein levels in their urine. The study aims to evaluate the effects of a combination of two drugs, zibotentan and dapagliflozin, compared to dapagliflozin alone. This Phase II, multicenter, randomized, double-blind study also assesses safety and tolerability of these treatments alongside standard care, including participants with or without type 2 diabetes mellitus. Participants not already using SGLT2 inhibitors will first receive dapagliflozin alone daily for 28 days during a run-in period. Then, all participants enter a 12-week double-blind treatment phase where they receive either the fixed-dose combination of zibotentan and dapagliflozin or dapagliflozin alone daily, with doses adjusted based on kidney function eGFR. After this period, participants stop the blinded treatment and continue open-label dapagliflozin alone for 4 weeks for safety follow-up. During the study, participants will have their urinary albumin to creatinine ratio UACR measured to evaluate kidney function at 12 weeks. Other assessments include urinary protein to creatinine ratio, blood pressure changes, and monitoring of any adverse events from the start of treatment through a follow-up visit 18 weeks after enrollment. The total participation includes screening, run-in, treatment, and safety follow-up periods, providing detailed data on the treatment effects and safety profile.

A Study to Investigate the Effects of Zibotentan/Dapagliflozin Combination Compared to Dapagliflozin Alone in Adult Participants With Chronic Kidney Disease and High Proteinuria