Effect of Insulin on Endothelin-Dependent Vascular Tone in the Forearm Circulation - Full Text View

Purpose

Previous studies have shown that insulin may stimulate the release of endothelin (ET) from endothelial cells. This mechanism may contribute to the adverse vascular effects determined by chronic hyperinsulinemia. The aim of this study will be to evaluate the effect of local hyperinsulinemia on ET activity in the forearm circulation. To this purpose, we will assess the forearm blood flow response to ET receptor antagonism in control conditions and during intraarterial infusion of insulin. We will also measure changes in plasma ET-1 levels in response to the different pharmacological stimuli.

Condition	Intervention	Phase
Hyperinsulinemia	Drug: Insulin	Phase I

Drug Information available for:

Insulin BQ 123

U.S. FDA Resources

Study Type:	Interventional
Study Design:	Treatment, Safety Study

Official Title:	Effect of Insulin on Endothelin-Dependent Vascular Tone in the Forearm Circulation

Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment:	16
Study Start Date:	March 1997
Estimated Study Completion Date:	March 2000

Detailed Description:

Previous studies have shown that insulin may stimulate the release of endothelin (ET) from endothelial cells. This mechanism may contribute to the adverse vascular effects determined by chronic hyperinsulinemia. The aim of this study will be to evaluate the effect of local hyperinsulinemia on ET activity in the forearm circulation. To this purpose, we will assess the forearm blood flow response to ET receptor antagonism in control conditions and during intraarterial infusion of insulin. We will also measure changes in plasma ET-1 levels in response to the different pharmacological stimuli.

Eligibility

Genders Eligible for Study:	Both
Accepts Healthy Volunteers:	Yes

Criteria

Between 40-65 years old.

No medications.

No medical problems.

No serum cholesterol levels below 200 mg/dl.

No contraceptives.

Contacts and Locations

Please refer to this study by its ClinicalTrials.gov identifier: NCT00001624

Locations


United States, Maryland
	National Heart, Lung and Blood Institute (NHLBI)
	Bethesda, Maryland, United States, 20892

Sponsors and Collaborators

National Heart, Lung, and Blood Institute (NHLBI)

More Information

Publications:

Haynes WG, Webb DJ. Contribution of endogenous generation of endothelin-1 to basal vascular tone. Lancet. 1994 Sep 24;344(8926):852-4.

Donckier J, Stoleru L, Hayashida W, Van Mechelen H, Selvais P, Galanti L, Clozel JP, Ketelslegers JM, Pouleur H. Role of endogenous endothelin-1 in experimental renal hypertension in dogs. Circulation. 1995 Jul 1;92(1):106-13.

Study ID Numbers:	970100, 97-H-0100
First Received:	November 3, 1999
Last Updated:	March 3, 2008
ClinicalTrials.gov Identifier:	NCT00001624
Health Authority:	United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):

BQ-123

Endothelin

Insulin

Plethysmography

Vasoconstriction

Healthy Volunteer

Study placed in the following topic categories:

Hyperinsulinism

Metabolic Diseases

Cyclo(Trp-Asp-Pro-Val-Leu)

Healthy

Metabolic disorder

Glucose Metabolism Disorders

Insulin

Additional relevant MeSH terms:

Hypoglycemic Agents

Physiological Effects of Drugs

Pharmacologic Actions

ClinicalTrials.gov processed this record on November 30, 2008

Sponsored by:	National Heart, Lung, and Blood Institute (NHLBI)
Information provided by:	National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:	NCT00001624