Living donor age and kidney transplant outcomes

Area of Science:

• Nephrology
• Transplantation Immunology
• Gerontology

Background:

• Kidney transplantation is a vital treatment for end-stage renal disease.
• The age of the living donor (LD) is increasingly recognized as a factor influencing transplant outcomes.
• Understanding the long-term impact of LD age is crucial for optimizing graft longevity.

Purpose of the Study:

• To evaluate the association between living donor age and kidney graft survival.
• To determine if LD age affects kidney function and proteinuria post-transplantation.
• To explore the influence of recipient age on the relationship between LD age and graft survival.

Main Methods:

• Retrospective analysis of 1063 adult kidney transplant recipients from 1980-2007.
• Assessment of pre- and post-transplant kidney function (GFR) and proteinuria.
• Univariate and multivariate analyses to identify predictors of graft survival, including LD age and recipient age.

Main Results:

• Increasing LD age correlated with lower pre- and post-transplant GFR and increased proteinuria.
• Univariate analysis showed reduced graft survival associated with lower GFR, proteinuria, and higher LD age.
• Multivariate analysis indicated LD age impacts graft survival independently of GFR, but is linked to proteinuria, particularly in recipients under 50.

Conclusions:

• Living donor age is a significant determinant of long-term kidney graft survival.
• Proteinuria post-transplant is a key indicator of reduced survival in older donor kidneys.
• The impact of LD age on graft survival is more pronounced in younger transplant recipients.