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Angiotensin-I-converting enzyme insertion/deletion polymorphism and high urinary albumin concentration in French Type
S Hadjadj1, Y Gallois, F Alhenc-Gelas
1Service de Médecine Interne, Endocrinologie, University Hospital, Poitiers, France.
Aims:
Family-based studies suggest a genetic basis for nephropathy in Type 2 diabetes. The angiotensin-I-converting enzyme (ACE) gene is a candidate gene for Type 1 diabetes nephropathy. We assessed the association between high urinary albumin concentration and ACE insertion/deletion (I/D) polymorphism, in French Type 2 diabetes patients.
Methods:
We studied 3139 micro/macroalbuminuric French patients recruited in the DIABHYCAR Study, an ACE inhibition trial in Type 2 diabetes patients with renal and cardiovascular outcomes. The main inclusion criteria were age >/= 50 years, urinary albumin concentration >/= 20 mg/l assessed centrally during two consecutive screening visits, and plasma creatinine concentration = 150 micro mol/l. These patients were compared with 605 normoalbuminuric (NA; urinary albumin concentration < 10 mg/l at first screening for the DIABHYCAR Study) French patients. ACE I/D genotype was determined by nested polymerase chain reaction.
Results:
The ACE I/D polymorphism was in Hardy-Weinberg equilibrium. The distribution of genotypes did not differ significantly between micro/macroalbuminuric and NA patients: 552 and 115 II, 1468 and 282 ID, 1119 and 208 DD (P = 0.67). However, the ACE D allele was more frequent among normotensive micro/macroalbuminuric patients than among NA patients (P = 0.039).
Conclusions:
The ACE I/D polymorphism was not associated with high urinary albumin concentration in French Type 2 diabetes patients.
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