title: Hypertension and ace gene insertion/deletion polymorphism in pediatric renal transplant patients.
abstract: The objective of the present study was to define the risk factors for hypertension and to analyze the influence of insertion/deletion (I/D) polymorphism of the angiotensin-converting enzyme (ACE) on hypertension in pediatric renal transplant recipients. Twenty-six pediatric renal transplant recipients with stable renal function and treated with the same immunosuppression protocol were included in the study. Their mean age was 12.5 +/- 3.3 yr and mean time after transplantation was 38.5 +/- 39.8 month. Twenty-four hour ambulatory blood pressure monitoring (ABPM) was performed by SpaceLabs (90207) device. The I/D polymorphism of the ACE was determined by PCR and ACE serum level was analyzed by colorimetric method. Hypertension was present in 15 patients (57.7%) by causal blood pressure measurements and 19 patients (73.1%) by ABPM. Twenty-two patients (84.6%) were found to be non-dipper and eight of them had reverse dipping. Only time after transplantation (38 +/- 31 vs. 79 +/-49 month, p = 0.016) and cyclosporin A trough plasma levels (206 +/-78 vs. 119 +/- 83 ng/mL, p = 0.020) influenced the presence of hypertension by multiple logistic regression analysis. The distribution of genotypes were II = 2 (7.7%), ID = 8 (30.8%), DD = 16 (61.5%). There was no effect of ACE gene I/D polymorphism or serum ACE levels on hypertension prevalence and circadian variability of blood pressures. Hypertension was related to the time after transplantation and cyclosporin A levels. The ACE gene I/D polymorphism and serum ACE levels did not influence the blood pressure values or circadian variability of blood pressure among pediatric renal transplant patients.
authors.affiliation: Department of Pediatric Nephrology, Ege University Medical School, Izmir, Turkey. erkin@med.ege.edu.tr
authors.forename: Erkin
authors.initials: E
authors.lastname: Serdaroglu
authors.forename: Sevgi
authors.initials: S
authors.lastname: Mir
authors.forename: Afig
authors.initials: A
authors.lastname: Berdeli
mesh_terms: D018660:Blood Pressure Monitoring, Ambulatory; D002648:Child; D005260:Female; D006801:Humans; D006973:Hypertension / Q000209:etiology / Q000235:genetics*; D007166:Immunosuppressive Agents / Q000627:therapeutic use; D016030:Kidney Transplantation / Q000009:adverse effects*; D008297:Male; D007703:Peptidyl-Dipeptidase A / Q000235:genetics*; D011110:Polymorphism, Genetic
chemical_list: D007166:Immunosuppressive Agents; D007703:Peptidyl-Dipeptidase A