Related Experiment Video
Updated: May 11, 2026

Mouse Kidney Transplantation: Models of Allograft Rejection
Published on: October 11, 2014
Pathophysiology and treatment options of chronic renal allograft damage
1Department of Nephrology, Klinikum rechts der Isar, München, Germany.
Abstract:
Chronic rejection is a poorly understood entity albeit a frequent cause of graft failure. Despite the advent of new immunosuppressive agents, neither the slope of graft destruction nor the frequency is ameliorated. There are a number of hypothesis which try to explain the conundrum of chronic graft destruction: ongoing rejection, antibody-mediated rejection, poor choice of organs, hyperfiltration, calcineurin inhibitors (CNI) nephrotoxicity and non-compliance among them. None of these hypotheses can explain all features of the process, thus, it is likely that they act in combination. What seems to be clear is a beneficial effect of early angiotensin-converting enzyme (ACE)/AT1 blocker treatment. It is less clear, however, whether a reduction or a switch from CNIs to other immunosuppressants prolongs graft survival. This review highlights the pathophysiological aspects that are important for the development of chronic allograft damage in the context of possible treatment options.
Insights
Chronic rejection remains a major cause of graft failure, with current treatments showing limited success. Early angiotensin-converting enzyme (ACE)/AT1 blocker use may benefit graft survival, though optimal immunosuppression strategies require further investigation.
Area of Science:
- Nephrology
- Immunology
- Transplantation Medicine
Background:
- Chronic rejection frequently leads to graft failure despite advancements in immunosuppression.
- The exact mechanisms driving chronic graft destruction are not fully understood.
- Hypotheses include ongoing rejection, antibody-mediated rejection, organ quality, hyperfiltration, calcineurin inhibitor (CNI) nephrotoxicity, and non-compliance, likely acting in concert.
Purpose of the Study:
- To review the pathophysiological aspects of chronic allograft damage.
- To explore potential treatment options for mitigating chronic rejection.
- To highlight the complexities and current understanding of graft failure.
Main Methods:
- Literature review of pathophysiological mechanisms.
- Analysis of existing hypotheses for chronic graft destruction.
- Discussion of current and potential therapeutic strategies.
Main Results:
- No single hypothesis fully explains chronic graft destruction; a combination of factors is probable.
- Early treatment with angiotensin-converting enzyme (ACE)/AT1 blockers appears beneficial.
- The impact of reducing or switching calcineurin inhibitors (CNIs) on graft survival remains unclear.
Conclusions:
- Chronic allograft damage is multifactorial, necessitating a comprehensive understanding of its pathophysiology.
- Targeting specific pathways, such as with ACE/AT1 blockers, shows promise.
- Further research is needed to optimize immunosuppressive regimens and improve long-term graft survival.
Related Concept Videos
Kidney Transplant II: Surgical Procedure
Chronic Kidney Disease III: Interprofessional Care
Kidney Transplant I: Introduction
Acute Kidney Injury II: Pathophysiology
Kidney Transplant III: Nursing Management
Chronic Kidney Disease I: Introduction