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Rosiglitazone lowers resting and blood pressure response to exercise in men with type 2 diabetes: A 1-year randomized
Marie-Eve Piché1,2, Anne-Sophie Laberge1, Patrice Brassard1,2
1Faculty of Medicine, Laval University, Quebec, Canada.
Aims:
We aimed to determine the effect of 1-year treatment with the insulin sensitizer peroxisome proliferator-activated receptor (PPAR)-γ agonist rosiglitazone on exercise capacity and blood pressure (BP) response to exercise in men with coronary artery disease (CAD) and type 2 diabetes (T2D).
Materials And Methods:
A total of 116 men (age, 64 ± 7 years; body mass index, 30.0 ± 4.4 kg/m2 ) with CAD and T2D were randomized to receive rosiglitazone or placebo for 1 year. Exercise capacity (VO2peak ) and BP response to exercise were assessed with a maximal treadmill test, prior to the intervention and at 1-year follow-up. Exercise-induced hypertension (EIH) was defined as maximal systolic BP ≥ 220 mm Hg and/or diastolic BP ≥ 100 mm Hg.
Results:
PPAR-γ agonist-treated patients showed improvements in fasting glucose, HbA1c and insulin sensitivity (Homeostasis model assessment of insulin resistance [HOMA-IR]) (all P < .05). Resting BPs, maximal exercise diastolic BP and resting rate-pressure product (RPP) were all reduced in the PPAR-γ agonist group (P < .05). Maximal exercise duration was unchanged. T2D patients who displayed the greatest improvement in insulin sensitivity (HOMA-IR) under PPAR-γ agonist treatment experienced a greater reduction in exercise BP and RPP (P < .05). The proportion of men with EIH decreased in the PPAR-γ agonist group during follow-up (39.00% ± 0.06% vs 21.00% ± 0.05%). In the subgroup with EIH that was treated with a PPAR-γ agonist, resting and exercise diastolic BP, as well as resting RPP, were all reduced at 1-year follow-up (P < .05).
Conclusions:
The insulin sensitizer rosiglitazone has a beneficial effect on resting and BP response to exercise in men with CAD and T2D, especially in those with an exaggerated BP response to exercise.
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