Archive for June 2016

How are diet-independent insulin resistance and defects in endothelial progenitor cell mobilization altered by particulate matter exposure? Find out by listening to this engaging podcast as Guest Editor Loren Wold (The Ohio State University) interviews lead author Petra Haberzettl (University of Louisville) and content expert Timothy Nurkiewicz (West Virginia University) about the recent study by Haberzettl et al published as part of our Call for Papers on Cardiovascular Responses to Environmental Stress. Haberzettl and co-authors used a mouse model to investigate exposure to fine particulate matter, altered sensitivity of blood vessels, and an inflammatory pathway. What “chicken and egg” problem does NOS uncoupling and oxidative stress pose, related to decreased insulin sensitivity via Akt? Does this work challenge the current literature to look beyond cytokines and interleukin-mediated processes to endothelial progenitor cells in the bone marrow? Listen and learn.

Petra Haberzettl, James P. McCracken, Aruni Bhatnagar, Daniel J. Conklin Insulin sensitizers prevent fine particulate matter-induced vascular insulin resistance and changes in endothelial progenitor cell homeostasis Am J Physiol Heart Circ Physiol, published June 1, 2016. DOI: 10.1152/ajpheart.00369.2015

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Does aging enhance the deleterious effects of exogenous estrogen in the female cerebrovasculature? In this engaging new podcast, Guest Editor Akos Koller (New York Medical College, Valhalla, and University of Physical Education, Budapest) interviews lead author John Stallone (Texas A & M University) and content expert Ines Drenjancevic (University of Osijek, Croatia) about the intriguing new work by Deer et al, which studied the interplay of vascular prostanoids, estrogen, and aging in small cerebral arteries. Why did the authors choose vasopressin to study the reactivity of the cerebral vasculature? How does the uncoupling of nitric oxide synthase to produce oxygen free radicals relate to aging? How does aging convert estrogen from a beneficial to a deleterious hormone? Listen and find out.

Rachel R. Deer, John N. Stallone Effects of estrogen on cerebrovascular function: age-dependent shifts from beneficial to detrimental in small cerebral arteries of the rat Am J Physiol Heart Circ Physiol, published May 15, 2016. DOI: 10.1152/ajpheart.00645.2015.

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