ACE genotype, phenotype and all-cause mortality in different cohorts of patients with type 1 diabetes. (June 2015)

• Record Type: Journal Article
• Authors: Færch, Louise H; Sejling, Anne-Sophie; Lajer, Maria; Tarnow, Lise; Thorsteinsson, Birger; Pedersen-Bjergaard, Ulrik
• Is Part Of: Journal of the renin-angiotensin-aldosterone system. Volume 16:Number 2(2015:Jun.)
• Page Start: 374
• Page End: 381
• Publication Date: 2015-06
• Subjects: ACE ID polymorphism -- ACE activity -- mortality -- T1DM -- diabetic nephropathy -- normoalbuminuria; Renin-angiotensin system -- Periodicals; 616.132
• DOI: 10.1177/1470320313494431
• Languages: English
• ISSNs: 1470-3203

Abstract

Aims: Carrying the D-allele of the angiotensin-converting enzyme (ACE) I/D polymorphism and high ACE activity are prognostic factors in diabetic nephropathy, which predicts mortality in type 1 diabetes. We studied the association between the ACE D-allele and ACE phenotype and long-term all-cause mortality in three single-institution outpatient cohorts. Methods: Genotype-based analyses were performed in 269 patients from Hillerød Hospital (HIH) (follow-up: 12 years) and in 439 patients with diabetic nephropathy and 437 patients with persistent normoalbuminuria from the Steno Diabetes Center (SDC) (follow-up: 9.5 years). Patients not on renin-angiotensin system (RAS)-blocking treatment were included in analyses of serum ACE activity (HIH: n = 208) and plasma ACE concentration (SDC: n =269). Results: In the HIH cohort, carrying a D-allele was associated with excess mortality (hazard ratio (HR) = 4.0 (95% confidence interval (CI) 1.0–16)), but not in the SDC cohorts. At HIH, serum ACE activity was associated with excess mortality (HR=1.04 (95% CI 1.0–1.1 per unit increase)), but in the SDC cohort plasma ACE concentration was not. Conclusion: In unselected patients with type 1 diabetes, carrying the ACE D-allele and high spontaneous serum ACE activity were associated with 12-year excess mortality. These findings could not be reproduced in two other cohorts with persistent normoalbuminuria or diabetic nephropathy.