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Diabetes Care, Vol 21, Issue 5 836-840, Copyright © 1998 by American Diabetes Association
Evaluation of the insertion/deletion ACE gene polymorphism as a risk factor for carotid artery intima-media thickening and hypertension in young type 1 diabetic patients
D Frost, M Pfohl, P Clemens, HU Haring and W Beischer
Third Department of Medicine, Burgerhospital Stuttgart, Germany.
OBJECTIVE: To study the distribution of the insertion/deletion polymorphism
of the ACE gene in young type 1 diabetic patients and to evaluate possible
associations between the ACE genotype, arterial hypertension, and
intima-media thickness (IMT) of the common carotid artery. RESEARCH DESIGN
AND METHODS: Study participants were 148 type 1 diabetic patients (56 men
and 92 women), aged 14-44 years, with a diabetes duration of > or = 2
years. HbA1c, albuminuria, and lipid status were assessed by standard
laboratory techniques; the ACE genotypes were assessed by polymerase chain
reaction. The patients were categorized according to the presence or
absence of hypertension, nephropathy, and retinopathy. The IMT, which can
be used to estimate early stages of atherosclerosis, was measured by
high-resolution ultrasonography. RESULTS: The ACE genotypes were
distributed as follows: 21% II, 37% ID, 42% DD. The IMT values did not
differ among patients with various ACE genotypes (0.63 +/- 0.15 mm), but
the prevalence of hypertension was significantly higher in patients with DD
(odds ratio, 4.26 versus II + ID; 95% CI, 1.64-11.06). Multiple linear
regression analysis showed that only age, hypertension, and sex were
determinants for the IMT. CONCLUSIONS: Our results suggest a relationship
between the prevalence of hypertension and the deletion polymorphism of the
ACE gene in young type 1 diabetic patients, but we could not find an
association between carotid artery IMT and ACE genotype in this population.

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Copyright © 1998 by the American Diabetes Association.
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