Background: Carriage of the angiotensin-converting enzyme (ACE) D-allele favors weight gain in mid-life and, possibly, cardiovascular complications; we aimed to verify the relationship between these conditions and ACE polymorphisms in the renal transplant (RTx) setting.
Methods: ACE genotypes were evaluated in 169 RTx recipients (107 males, 62 females) and related to body mass index (BMI; kg/m2) changes 1 year after transplant, as well as to cardiovascular events and allograft loss. Allelic frequencies and body weights were compared with those of a control group (age- and sex-matched healthy blood donors).
Results: Allelic frequencies were 0.639 and 0.669 for the D-allele, and 0.361 and 0.331 for the I-allele, in recipients and controls, respectively (p=NS). In the patient population, carriage of the I/ allele was associated with a BMI >23 at the time of RTx (p<0.005). In contrast, in the control group, higher BMI values tended to occur in D/ carriers. Moreover, BMI values were higher in the control group (24.7 -/+ 3.5 vs. 23.6 -/+ 3.3, p=0.003) but, 1 year after RTx, this difference was nullified. At multivariate analysis, the factors associated with weight gain after RTx were ACE D/D (odds ratio [OR] = 2.35, 95% confidence interval [95% CI], 1.00-5.49) and age at RTx
Conclusion: Body weight at the time of RTx and weight gain 1 year after RTx, but not cardiovascular complications and allograft loss, are related to the ACE I/D genotype of RTx recipients.
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