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Chronic rejection in renal allografts: importance of cardiovascular risk factors
1Department of Internal Medicine, University of Iowa Hospitals & Clinics, Iowa City 52242-1081, USA.
Insights
Cardiovascular risk factors like obesity and high cholesterol do not appear to increase the risk of chronic vascular rejection in kidney transplant recipients. This study found no significant correlation, supporting existing research on renal allografts.
Area of Science:
- Nephrology
- Transplantation Immunology
- Cardiovascular Medicine
Background:
- Chronic vascular rejection remains a significant cause of renal allograft loss.
- Cardiovascular risk factors are increasingly recognized as potential contributors to long-term transplant outcomes.
Purpose of the Study:
- To investigate the association between traditional cardiovascular risk factors and the development of chronic vascular rejection in kidney transplant recipients.
- To determine if obesity, blood pressure, cholesterol levels, and tobacco use influence the long-term function and survival of renal allografts.
Main Methods:
- Retrospective case-control study of renal transplants performed between 1973 and 1991.
- Inclusion of patients with functioning grafts >365 days, stratified into graft failure, death with functioning graft, and living controls.
- Comparison of cardiovascular risk factors (weight, blood pressure, cholesterol, tobacco use) among the study groups.
Main Results:
- No significant differences were observed in weight, weight changes, mean blood pressures, mean serum cholesterol values, or tobacco use among the groups.
- The prevalence of these cardiovascular risk factors did not correlate with the development of chronic vascular rejection or graft failure.
Conclusions:
- Traditional cardiovascular risk factors are not significantly associated with chronic vascular rejection in renal allograft recipients.
- Findings align with previous studies suggesting a lack of correlation between these factors and chronic rejection of human renal allografts.
Abstract:
Using a case-control method, we reviewed retrospectively renal transplants performed at University of Iowa Hospitals & Clinics between April, 1973 and May 29, 1991 to see if cardiovascular risk factors such as obesity, blood pressure, cholesterol, and tobacco use were important risk factors for development of chronic vascular rejection. Of 1161 transplants done during that time, 834 patients had renal allografts which functioned for greater than 365 days. From this subgroup we selected all surviving patients (n = 97) who had a functioning graft for greater than 365 days but whose graft subsequently failed. We also selected all patients (n = 26) who died with a functioning graft. Finally, we selected 52 control patients who were still living with functioning grafts, approximately matched to the study patients for date of transplant. We found no significant difference among the three groups in weight and weight changes, mean blood pressures, mean serum cholesterol values, or tobacco use. Our findings agree with previously published studies indicating a lack of correlation of cardiovascular risk factors with the development of chronic rejection of renal allografts in humans.