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Functional Dilator Capacity is Independently Associated with Insulin Sensitivity and Age in Central Obesity and is not Improved by High Dose Statin Treatment
Author(s) -
CLOUGH GERALDINE F.,
L’ESPERANCE VELINE,
TURZYNIECKA MAGDALENA,
WALTER LARA,
CHIPPERFIELD ANDREW J.,
GAMBLE JOHN,
KRENTZ ANDREW J.,
BYRNE CHRISTOPHER D.
Publication year - 2011
Publication title -
microcirculation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.793
H-Index - 83
eISSN - 1549-8719
pISSN - 1073-9688
DOI - 10.1111/j.1549-8719.2010.00070.x
Subject(s) - dilator , medicine , atorvastatin , cardiology , endocrinology , placebo , insulin , insulin sensitivity , insulin resistance , alternative medicine , pathology
Please cite this paper as: Clough, L’Esperance, Turzyniecka, Walter, Chipperfield, Gamble, Krentz and Byrne (2011). Functional Dilator Capacity is Independently Associated with Insulin Sensitivity and Age in Central Obesity and is not Improved by High Dose Statin Treatment. Microcirculation 18 (1) , 74–84. Abstract Objective: To test the hypothesis that: (i) functional microvascular dilator capacity is independently associated with insulin sensitivity and age in individuals with central adiposity at risk of cardiovascular disease (CVD); and (ii) functional microvascular dilator capacity is improved by high dose statin treatment. Methods: Functional dilator capacity (measured as change in laser Doppler blood flux from baseline during post occlusive reactive hyperemia [peak flux%resting flux; PF%RF] and flowmotion (power spectral density [PSD] analysis)) were assessed in 40 people with central adiposity and one or more other CVD risk factors. Measurements were made at rest and during acute hyperinsulinaemia before and six months after high dose atorvastatin (40 mg daily) or placebo. Results: Insulin‐induced change in PF%RF was independently associated with insulin sensitivity (M/I) ( r = 0.46 p = 0.02) and age ( r = −0.46 p = 0.02), which together explained almost half of the variance in PF%RF (adjusted r 2 = 0.37, p = 0.008). Whilst atorvastatin decreased LDL cholesterol by 51% ( p < 0.001), PF%RF and flowmotion remained unchanged. Conclusions: Insulin sensitivity and age are independently associated with an insulin‐induced change in functional microvascular dilator capacity in individuals with central adiposity at risk of CVD. Dilator capacity is not improved by six months high dose statin treatment.