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DAPAgliflozin for renal protection in heart transplant recipients. Rationale and design of the randomized controlled
Stine Holmen1, Olivier Manintveld2, Kevin Damman3
1Department of Cardiology, Oslo University Hospital, Oslo, Norway; Department of Medicine, Innlandet Hospital Trust, Hamar, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Norway.
Insights
The DAPARHT trial investigates if dapagliflozin, a sodium-glucose cotransporter 2 inhibitor (SGLT2i), can protect kidney function in heart transplant recipients. This study will provide the first randomized evidence on SGLT2i efficacy in this population.
Area of Science:
- Cardiology
- Nephrology
- Pharmacology
Background:
- Heart transplantation is a vital treatment for end-stage heart failure.
- Kidney function frequently declines post-heart transplantation.
- Sodium-glucose cotransporter 2 inhibitors (SGLT2i) are known to slow kidney function decline in other patient groups.
Purpose of the Study:
- To evaluate the effect of dapagliflozin on kidney function in heart transplant recipients.
- To assess the efficacy of SGLT2i in preserving estimated glomerular filtration rate (eGFR) after heart transplantation.
Main Methods:
- The DAPAgliflozin for Renal protection in Heart Transplant recipients (DAPARHT) trial is a double-blind, randomized, placebo-controlled study.
- Adult heart transplant recipients (at least one year post-transplant, eGFR ≥ 25 mL/min/1.73m² ) will receive 10 mg dapagliflozin or placebo for 12 months.
- The primary endpoint is the chronic slope of eGFR from two weeks to 12 months; a 24-month open-label phase will follow.
Main Results:
- Enrollment is ongoing, with 300 of 430 patients enrolled as of December 18th, 2024.
- Mean baseline creatinine is 104 ± 28 μmol/L, with a mean eGFR of 66 ± 22 mL/min/1.73m².
- The study is expected to conclude with the last patient visit in September 2028.
Conclusions:
- The DAPARHT trial will provide the first randomized evidence on the efficacy of SGLT2i in heart transplant recipients.
- The study aims to determine if dapagliflozin can improve the eGFR slope compared to placebo over one year.
Background And Aims:
Heart transplantation is the preferred treatment for selected patients with end stage heart failure. Kidney function often declines after heart transplantation. Sodium-glucose cotransporter 2 inhibitors (SGLT2i) slow the decline in eGFR in different populations. However, the effect of SGLT2i on kidney function in heart transplant recipients is unknown.
Methods:
The Dapagliflozin for Renal protection in Heart Transplant recipients (DAPARHT) trial is an investigator initiated, double blind, randomized, placebo-controlled trial designed to assess dapagliflozin's effect on kidney function in heart transplant recipients. Adults heart transplanted at least one year prior to randomization are eligible. Exclusion criteria include an estimated glomerular filtration rate (eGFR) <25 mL/min/1.73 m2, diabetes type I, and contraindication to study medication. Four hundred and thirty patients will be randomized 1:1 to receive 12 months blinded treatment with dapagliflozin 10 mg o.d. or placebo, followed by 24-months open-label treatment. The primary endpoint is the chronic slope of the eGFR from two weeks to 12 months after starting randomized treatment. The open-label phase evaluates dapagliflozin's long-term effects on kidney function, clinical outcomes, safety, and tolerability. Enrolment began in June 2022. As of December 18, 2024, 300 patients were enrolled. The mean baseline creatinine was 104 ± 28 µmol/L with corresponding eGFR of 66 ± 22 mL/min/1.73 m2. Estimated last patient visit is in September, 2028.
Conclusion:
The DAPARHT trial will test whether dapagliflozin improves eGFR slope compared to placebo during one year of follow-up, providing the first randomized evidence of the efficacy of SGLT2i in heart transplant recipients.
Trial Registration:
Dapagliflozin for Renal protection in Heart Transplant recipients (DAPARHT), NCT05321706, clinicaltrials.gov.
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