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Gender, coupled with diabetes, affects vascular disease development
Date:8/15/2007

Austin, TX - Diabetes is associated with the development of vascular (blood vessel) disease. As we age, vascular disease becomes more common. It has been thought that females may be more susceptible to the earlier development of vascular disease, as vascular changes are observed in females long before any significant development occurs in males. Now, a team of Georgetown University researchers has determined that the vascular activities in diabetic animals vary according to sex. This discovery may eventually have implications for the way males and females are treated medically in the future.

The Study

The study, entitled "Sex Differences in Response to Vasoactive Substances in Early Uncontrolled Diabetes," was conducted by Adam Mitchell, Adam Myers and Susan Mulroney, all of the Department of Physiology and Biophysics, Georgetown University, Washington, DC. Mr. Mitchell presented the status of the teams findings at the conference, Sex and Gender in Cardiovascular-Renal Physiology and Pathophysiology. The meeting, sponsored by the American Physiological Society (APS; www.The-APS.org), was held August 9-12, 2007 in Austin, TX.

The Study

The researchers examined the notion that very early changes in artery activity exists in diabetic animals and differ by sex. To test their hypothesis they divided adult male and female rats into three groups. The first group (control) received no treatment. The second group received streptozotocin (STZ) to induce diabetes. The third group received STZ plus growth hormone (GH), which is thought to exacerbate disease progression in diabetes.

After eight weeks, the vascular reactivity to phenylephrine, which increases blood pressure, and acetylcholine, which reduces blood pressure, was measured in the vessels from the animals. Vascular response to these substances was also observed during exposure to L-NAME (which blocks production of nitric
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Contact: Donna Krupa
DKrupa@the-APS.org
301-634-7209
American Physiological Society
Source:Eurekalert

Page: 1 2

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