Expired Study
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Bethesda, Maryland 20892


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.


Study summary:

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.


Criteria:

Between 40-65 years old. No medications. No medical problems. No serum cholesterol levels below 200 mg/dl. No contraceptives.


Study is Available At:


Original ID:

970100


NCT ID:

NCT00001624


Secondary ID:

97-H-0100


Study Acronym:


Brief Title:

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


Official Title:

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


Overall Status:

Completed


Study Phase:

Phase 1


Genders:

Both


Minimum Age:

N/A


Maximum Age:

N/A


Quick Facts

Healthy Volunteers
Oversight Has DMC
Study Is FDA Regulated
Study Is Section 801
Has Expanded Access

Study Source:

National Institutes of Health Clinical Center (CC)


Oversight Authority:

United States: Federal Government


Reasons Why Stopped:


Study Type:

Interventional


Study Design:

Endpoint Classification: Safety Study, Primary Pu


Number of Arms:

0


Number of Groups:

0


Total Enrollment:

16


Enrollment Type:


Study Dates

Start Date:March 1997
Completion Date:March 2000
Verification Date:February 1999
Last Changed Date:March 3, 2008
First Received Date:November 3, 1999

Study Outcomes

There are no available Study Outcomes

Study Interventions

Intervention Type:Drug
Name:Insulin

Study Arms

There are no available Study Arms

Study Agencies

Agency Class:NIH
Agency Type:Lead Sponsor
Agency Name:National Heart, Lung, and Blood Institute (NHLBI)

Sample and Retention Information

There are no available Sample and Retention Information

Study References

Reference Type:Reference
Citation: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.
PMID:7788903
Reference Type:Reference
Citation:Haynes WG, Webb DJ. Contribution of endogenous generation of endothelin-1 to basal vascular tone. Lancet. 1994 Sep 24;344(8926):852-4.
PMID:7916401

Data Source: ClinicalTrials.gov

Date Processed: November 18, 2019

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