The purpose of this study is to investigate the effect of a 12-week candesartan treatment compared with hydrochlorothiazide on insulin sensitivity assessed with hyperinsulinemic euglycemic clamp.
To investigate the mechanisms underlaying the diabetes-preventing effect of candesartan with respect to possible impact on insulin sensitivity, beta cell function and adipose tissue function and distribution. For this purpose comparisons will be performed with hydrochlorothiazide and placebo treatment. It is hypothesized that candesartan will improve insulin sensitivity as compared to hydrochlorothiazide and possibly also in comparison with placebo and that this could be explained by altered fat tissue function or distribution or by an altered sympathetic to parasympathetic balance in the autonomic nervous system. Hydrochlorthiazide is chosen as comparator because thiazides are a recommended firs-line therapy in hypertension. This drug class has some detrimental effects on glucose tolerance and in insulin sensitivity.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
26
Umeå University Hospital
Umeå, Sweden
Compare the effect of candesartan and hydorclorothiszide treatment on insulin sensitivity assessed with hyperinsulinemic euglycemic clamp
Time frame: 12 weeks
Compare the effect of candesartan treatment with placebo on insulin sensitivity and compared with hydrochlorothiazide and placebo on:
Time frame: 12 weeks
beta cell function
Time frame: 12 weeks
vascular/endothelial function;
Time frame: 12 weeks
lipolysis regulation
Time frame: 12 weeks
autonomic nerve activity;
Time frame: 12 weeks
abdominal fat tissue distribution;
Time frame: 12 weeks
amount of lean body and fat mass;
Time frame: 12 weeks
liver and muscle fat;
Time frame: 12 weeks
interaction betw. insulin and AT-II in fat cell metabolism; fat cell gene expression
Time frame: 12 weeks
adipokine levels
Time frame: 12 weeks
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