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Age-associated decline in cardiac allograft rejection
D G Renlund1, E M Gilbert, J B O'Connell
1Division of Cardiology, University of Utah Medical Center, Salt Lake City 84132.
The American Journal of Medicine
|September 1, 1987
Summary
Older heart transplant recipients experienced significantly less cardiac allograft rejection. This suggests age-related immune function decline may benefit carefully selected older patients in transplantation.
Area of Science:
- Cardiology
- Immunology
- Transplantation Science
Background:
- Cardiac allograft rejection remains a significant challenge in heart transplantation.
- The influence of recipient age on rejection rates requires further investigation.
Purpose of the Study:
- To investigate the impact of recipient age on the incidence and timing of cardiac allograft rejection.
- To evaluate the relationship between age and post-transplant outcomes, including rejection, infection, and survival.
Main Methods:
- Retrospective analysis of 57 consecutive cardiac transplant recipients.
- Comparison of rejection episodes, time to first rejection, infection rates, and survival between older (≥54 years) and younger (<52 years) recipients.
- Multivariate analysis to identify predictors of rejection, controlling for clinical factors.
Main Results:
- Older recipients (≥54 years) exhibited significantly fewer rejection episodes compared to younger recipients (p<0.001).
- First rejection episodes occurred later in older recipients (50.4 days vs 27.7 days, p=0.008).
- Younger age was a significant predictor of rejection in multivariate analysis (r=0.64, p<0.05), without increased infection rates or decreased survival.
Conclusions:
- Advanced age is associated with a reduced risk of cardiac allograft rejection.
- Age-related decline in immune function may confer a protective effect against rejection in heart transplant recipients.
- Carefully selected older patients may represent a favorable demographic for cardiac transplantation.