Mitochondrial membrane potential and delayed graft function following kidney transplantation

Area of Science:

• Nephrology
• Transplantation Biology
• Mitochondrial Medicine

Background:

• Delayed graft function (DGF) affects 20%-40% of deceased-donor kidney transplants, leading to longer hospital stays and potential allograft failure.
• Mitochondrial dysfunction, indicated by reduced mitochondrial membrane potential (MMP), is a potential marker for tissue health and ischemia-reperfusion injury.

Purpose of the Study:

• To investigate the association between pretransplant mitochondrial membrane potential (MMP) and the occurrence of delayed graft function (DGF) in deceased-donor kidney transplants.
• To assess MMP as a potential surrogate marker for kidney allograft health and DGF risk.

Main Methods:

• A prospective, single-center study measured pretransplant MMP in 28 deceased donor kidneys.
• Hybrid registry-augmented regression was used to analyze the association between MMP and DGF, adjusting for donor and recipient factors.
• Scientific Registry of Transplant Recipients data was leveraged to minimize overfitting.

Main Results:

• Lower MMP levels (<4000 units) were significantly associated with kidneys from female donors and donation after cardiac death donors.
• A 10% decrease in MMP levels correlated with a 38% increase in the odds of DGF (adjusted odds ratio = 1.38, P = 0.01).

Conclusions:

• Pretransplant MMP is a promising independent surrogate marker for kidney allograft tissue health.
• Further validation of MMP could enhance clinical decision-making in organ allocation, patient counseling, and postoperative management for kidney transplantation.