[Chronic dysfunction of a transplanted kidney: the problem still unresolved]

Area of Science:

• Nephrology
• Transplantation Immunology
• Clinical Medicine

Background:

• Kidney transplantation is the optimal treatment for end-stage renal disease, improving patient survival and quality of life.
• Long-term kidney graft loss remains a significant challenge, primarily attributed to chronic rejection and recurrent glomerulonephritis.
• The impact of calcineurin inhibitor nephrotoxicity on graft survival has been historically overestimated and appears minimal.

Purpose of the Study:

• To review the current understanding of long-term kidney graft loss.
• To highlight the primary causes of graft failure, including chronic rejection and recurrence.
• To emphasize the need for prospective randomized trials to establish optimal treatment strategies.

Main Methods:

• Review of current literature on kidney transplantation outcomes.
• Analysis of factors contributing to long-term graft loss.
• Discussion of histological classification systems and their limitations.

Main Results:

• Chronic rejection and recurrence of glomerulonephritis are the principal causes of long-term kidney graft failure.
• Calcineurin drug nephrotoxicity has a minor impact on long-term graft survival.
• Despite advances, optimal treatment strategies for many graft injury cases are lacking.

Conclusions:

• Further prospective randomized trials are essential to address unresolved therapeutic questions in kidney transplantation.
• Understanding graft injury mechanisms requires continuous updates to histological classifications.
• Focusing on chronic rejection and recurrence is critical for improving long-term graft survival.