Background: The effects of dipeptidyl peptidase 4 (DPP-4) inhibitors on blood pressure in patients with diabetes mellitus (DM) are controversial. There is no information on the effect of DPP-4 inhibitors on blood pressure and arterial stiffness in hypertensive patients with DM. We evaluated the effects of alogliptin on blood pressure and arterial stiffness in hypertensive patients with type 2 diabetes mellitus (T2DM).
Methods: Blood pressure and brachial-ankle pulse wave velocity (baPWV) were measured before and after 3, 6, and 12 months of treatment with alogliptin in 22 hypertensive patients with T2DM.
Results: After 3, 6, and 12 months, alogliptin treatment decreased hemoglobin A1c from 7.0 ± 0.97% to 6.4 ± 0.61%, 6.3 ± 0.58%, and 6.3 ± 0.75% (P < 0.01, respectively), glucose from 8.6 ± 4.39 mmol/l to 7.05 ± 2.16, 7.05 ± 2.28, and 6.44 ± 1.50 mmol/l (P < 0.01, respectively), systolic blood pressure from 137 ± 18 mm Hg to 127 ± 13, 125 ± 15, and 120 ± 17 mm Hg (P < 0.01, respectively), diastolic blood pressure from 79 ± 13 mm Hg to 74 ± 8, 74 ± 10, and 70 ± 8 mm Hg (P < 0.01, respectively) and baPWV from 1,947 ± 349 cm/second to 1,774 ± 259, 1,856 ± 361, and 1,756 ± 286 cm/second (P < 0.01, respectively). A baseline baPWV value of 1,643 cm/second was the optimal cut-off value for patients who had reduced blood pressure after treatment with alogliptin (sensitivity of 83.3% and specificity of 75.0%).
Conclusions: Alogliptin was associated with improvements not only in glucose metabolism but also in blood pressure and arterial stiffness in hypertensive patients with T2DM. The cut-off value of baPWV may enable identification of responders of decrease in blood pressure by alogliptin in hypertensive patients with T2DM.
Clinical Trials Registration: Registration Number for Clinical Trial: UMIN000007722.
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