Role of donor age and acute rejection episodes on long-term graft survival in cadaveric kidney transplantations
- PMID: 16213272
- DOI: 10.1016/j.transproceed.2005.08.038
Role of donor age and acute rejection episodes on long-term graft survival in cadaveric kidney transplantations
Abstract
Cadaveric donors can provide an effective solution to the problem of organ shortage, and many factors that may affect the functioning and survival of cadaveric kidneys have been studied. We aimed to clarify the impact of donor age and acute rejection episodes on long-term graft and patient survival in patients receiving cadaveric renal transplants. We retrospectively evaluated the long-term outcomes of 207 patients who had received cadaveric renal transplants between 1985 and 2004. Mean recipient age, HLA mismatch, mean donor age, delayed graft function (DGF), mean cold ischemia time, acute rejection episodes in the first 6 months after transplantation, and 1-, 3-, and 5-year graft survivals were evaluated. Two study groups were created according to donor age: group 1 (n = 126) was composed of patients receiving kidneys from donors younger than 50 years, and group 2 (n = 81) was composed of patients receiving kidneys from donors 50 years of age or older. Mean recipient age, HLA mismatch, and mean cold ischemia time between groups were not different. The DGF rate in group 1 was 40% (n = 50) and in group 2 was 46% (n = 37) (P > .05). The 1-, 3-, and 5-year survival rates of patients without acute rejection within the first 6 months after transplantation in group 1 (58/126; 46%) versus those in group 2 (46/81; 57%) were 95% versus 90%, 65% versus 60%, and 40% versus 35%, respectively (P > .05). The 1-, 3-, and 5-year graft survival rates of patients with acute rejection within the first 6 months in group 1 (n = 68) versus those in group 2 (n = 35) were 93% versus 89%, 71% versus 55%, and 44% versus 28%, respectively (P = .005). There was no significant difference in 1-, 3-, and 5-year survival rates between patients with DGF in both groups. Acute rejection episodes within the first 6 months after cadaveric transplantation, especially in patients receiving kidneys from donors older than 50 years, were shown to affect 5-year survival of the kidney graft. However, cadaver age alone had no negative effect on 5-year graft survival rates. Cadaveric donors older than 50 years may be a solution to the organ shortage in the treatment of end-stage renal disease.
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