This is an exploratory, multicenter, single-arm study designed to evaluate the efficacy of perioperative Vonoprazan Fumarate in reducing the incidence of Delayed Graft Function (DGF) in deceased-donor kidney transplant recipients. DGF is a common early complication that significantly impacts graft function and long-term transplant survival. This study aims to explore how Vonoprazan Fumarate, a potassium-competitive acid blocker (P-CAB), can potentially improve macrophage phagocytic function, reduce kidney inflammation, and enhance early kidney function recovery.
Patients aged 18 years and older who are undergoing first-time deceased-donor kidney transplantation will be enrolled. Vonoprazan Fumarate will be administered daily starting on the day of transplantation and continuing for seven days post-surgery. The primary endpoint is DGF incidence, while secondary endpoints include kidney function recovery, serum creatinine reduction, estimated glomerular filtration rate, and safety assessments. Adverse events will be monitored, and the study will also explore potential biomarkers for inflammation and graft function.
The study is expected to provide insights into a potential new therapeutic strategy to reduce DGF and improve early kidney transplant outcomes, potentially benefiting future kidney transplant patients by offering a safer and more effective perioperative treatment option.
Age ≥ 18 years at time of transplantation.
Undergoing first-time deceased-donor kidney transplantation.
No administration of proton-competitive acid blockers (P-CABs) in the 1 month prior to transplantation.
Consent to receive the standard immunosuppressive therapy post-transplantation.
Receiving a living-donor kidney transplant or multi-organ transplantation.
Previous history of any solid organ or cellular transplantation (with the exception of corneal transplants).
Intraoperative occurrence of hyperacute rejection or confirmed graft non-function (e.g., renal artery thrombosis).
Presence of high risk for primary graft non-function (e.g., severe injury to the transplant renal artery).
Single group
Vonoprazan fumarate
DrugPhase Ib: A dose escalation study will be initiated with vonoprazan fumarate 20 mg once daily (qd). Two dose groups are planned: 20 mg qd and 20 mg twice daily (bid). According to a "3+3" dose escalation scheme, the first three subjects will receive vonoprazan fumarate 20 mg qd orally, starting on the day of kidney transplantation and continuing until postoperative day 7. Safety and tolerability will be assessed from the day of transplantation through postoperative days 7 and 28. Phase II: An expansion study will be conducted at the recommended Phase II dose of vonoprazan fumarate to evaluate the efficacy, safety, and tolerability of the regimen. Vonoprazan fumarate will be administered orally, starting on the day of kidney transplantation and continuing daily until postoperative day 7. Throughout both the Phase Ib and Phase II stages, all recipients will receive the center's standard immunosuppressive regimen.
Incidence of Delayed Graft Function (DGF)
Delayed Graft Function (DGF) is defined as the requirement for any form of dialysis (hemodialysis or peritoneal dialysis) due to renal insufficiency within the first week after kidney transplantation.
The rate of serum creatinine decline
The rate of serum creatinine decline will be calculated on a daily basis from postoperative day 1 to day 7.
Estimated Glomerular Filtration Rate (eGFR)
eGFR will be measured daily from postoperative day 1 through day 7.
Daily urinary output
Daily urinary output will be recorded from postoperative day 1 through day 7.
Incidence of Adverse Events
Adverse events-specifically renal (e.g., acute rejection), gastrointestinal (e.g., bloody stools, acid reflux), and electrolyte imbalance (e.g., hypomagnesemia, hyperkalemia)-will be recorded.
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First Affiliated Hospital of Chongqing Medical University
Lead sponsor
Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University
Collaborator
