Study of Sildenafil Citrate on Insulin Resistance in African American
Obesity has a greater detrimental impact on the health of African American women than on any other racial or gender group. Nearly 80% of African American women are overweight or obese in the United States. Hypertension and insulin resistance are more prevalent among African American women as compared to men and Caucasians. These conditions put them at increased risk for the development of diabetes mellitus and cardiovascular disease.
Recent studies have reported that a substance named Nitric Oxide (NO)may have some beneficial effect on how the body handles blood sugar and blood pressure. Of interest,some studies have shown that African Americans have decreased function of NO in their blood vessels.
In this study proposal the investigators will test if increasing NO function with a PDE-5 inhibitor (sildenafil citrate) will improve pre-diabetes and the health of the inner layer of the blood vessels in obese African American women.
|Study Design:||Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
|Official Title:||Effect of Sildenafil Citrate on Insulin Resistance and Endothelial Function in Obese African American Women|
- Insulin sensitivity [ Time Frame: Baseline, 4 weeks, 6 weeks ] [ Designated as safety issue: No ]
- Endothelial Function [ Time Frame: Baseline, 4 weeks, 6 weeks ] [ Designated as safety issue: No ]
|Study Start Date:||April 2011|
|Study Completion Date:||September 2013|
|Primary Completion Date:||August 2013 (Final data collection date for primary outcome measure)|
|Placebo Comparator: Sildenafil||
Drug: Sildenafil, placebo
20 mg TID
Other Name: Revatio
|United States, Tennessee|
|Nashville, Tennessee, United States, 37232|
|Principal Investigator:||Cyndya Shibao, MD||Vanderbilt University|