Michael E . Widlansky

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Defining new approaches for the prevention and treatment of atherosclerosis is an important priority. Recently, measurement of endothelial function in patients has emerged as a useful tool for atherosclerosis research. Risk factors are associated with impaired endothelial function, and clinical syndromes relate, in part, to a loss of endothelial control of(More)
Dick H. J. Thijssen, Mark A. Black, Kyra E. Pyke, Jaume Padilla, Greg Atkinson, Ryan A. Harris, Beth Parker, Michael E. Widlansky, Michael E. Tschakovsky, and Daniel J. Green Research Institute for Sport and Exercise Science, Liverpool John Moores University, Liverpool; Department of Physiology, Radboud University Nijmegen Medical Centre, Nijmegen, The(More)
OBJECTIVE Sedentary lifestyle increases the risk of cardiovascular disease and diabetes. Vascular dysfunction contributes to atherogenesis and has been linked to insulin resistance. METHODS AND RESULTS We measured insulin sensitivity by glucose tolerance test and vascular function by ultrasound and venous occlusion plethysmography in 20 healthy subjects(More)
alpha-Lipoic acid (LA), a naturally occurring dithiol compound, has long been known as an essential cofactor for mitochondrial bioenergetic enzymes. Aside from its enzymatic role, in vitro and in vivo studies suggest that LA also acts as a powerful micronutrient with diverse pharmacologic and antioxidant properties. Pharmacologically, LA improves glycemic(More)
BACKGROUND Endothelial dysfunction contributes to the development of atherosclerosis in patients with diabetes mellitus, but the mechanisms of endothelial dysfunction in this setting are incompletely understood. Recent studies have shown altered mitochondrial dynamics in diabetes mellitus with increased mitochondrial fission and production of reactive(More)
BACKGROUND Epidemiological studies demonstrate an inverse relation between dietary flavonoid intake and cardiovascular risk. Recent studies with flavonoid-containing beverages suggest that the benefits of these nutrients may relate, in part, to improved endothelial function. OBJECTIVE We hypothesized that dietary supplementation with epigallocatechin(More)
Mitochondria are well known for their central roles in ATP production, calcium homeostasis, and heme and steroid biosynthesis. However, mitochondrial reactive oxygen species (ROS), including superoxide and hydrogen peroxide, once thought to be toxic byproducts of mitochondrial physiologic activities, have recently been recognized as important cell-signaling(More)
OBJECTIVE Hypoglycemia is associated with increased mortality. The reasons for this remain unclear, and the effects of low glucose exposure on vascular endothelial function remain largely unknown. We endeavored to determine the effects of low glucose on endothelial cells and intact human arterioles. METHODS AND RESULTS We exposed human umbilical vein(More)
Multiple studies have documented an increased incidence of cardiovascular events in the winter, but the pathophysiologic mechanisms remain incompletely understood. It was hypothesized that brachial flow and flow-mediated dilation (FMD) would vary by season and temperature. Season and temperature were related to ultrasonic brachial artery(More)