Metabolic Causes of Thrombosis in Type 2 Diabetes - Question 1

December 10, 2014 updated by: Steve Davis, Vanderbilt University

SCCOR in Hemostatic and Thrombotic Diseases Project 5 - Metabolic Causes of Thrombosis in Type 2 Diabetes

The purpose of this study is to learn more about why patients with diabetes have increased heart attacks, strokes and other illnesses due to blood clots causing blockage of a blood vessel. The proposed protocol will study the separate and combined effects of hyperglycemia and hyperinsulinemia on endothelial function and fibrinolytic balance in Type 2 DM. Our hypothesis is that hyperglycemia, rather than hyperinsulinemia, is responsible for the dysregulation of fibrinolytic balance in diabetics.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

This study will test the hypothesis that hyperglycemia will impair, while hyperinsulinemia will improve endothelial function and vascular fibrinolytic balance in type 2 DM. As discussed above, their roles in the increased prevalence of thrombotic events occurring in diabetics have not been defined. More recent data supports insulin as profibrinolytic and hyperglycemia to cause endothelial dysfunction. Conclusive studies are lacking in diabetic subjects. Furthermore, preliminary data from this lab indicates that in non-diabetic controls, hyperglycemia results in a prothrombotic state by increasing plasma PAI-1 and reducing tPA levels. The proposed protocol will study the separate and combined effects of hyperglycemia and hyperinsulinemia on endothelial function and fibrinolytic balance in Type 2 DM.

Study Type

Interventional

Enrollment (Actual)

32

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Tennessee
      • Nashville, Tennessee, United States, 37232
        • Vanderbilt University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 60 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • 16 ( 8 female/ 8 male) Type 2 diabetic patients age 18-60 yrs
  • 16 ( 8 female/ 8 male) Non-diabetic controls age and weight matched
  • Body mass index 25-52 kgm2
  • Female volunteers of childbearing potential: negative HCG pregnancy test
  • Volunteers over 40 years old: normal baseline ECG
  • For those with type 2 diabetes: HBA1C 6.5-10%

Exclusion Criteria:

  • Prior history of poor health: any current or prior disease condition that alters carbohydrate metabolism and prior cardiac events and/or evidence for cardiac disease
  • Uncontrolled hypertension
  • History of cerebrovascular incidents
  • Pregnancy
  • Subjects unable to give voluntary informed consent
  • Subjects with a recent medical illness
  • Subjects with known liver or kidney disease
  • Subjects on anticoagulant drugs, anemic, or with known bleeding diseases
  • Tobacco Use

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Factorial Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: 1
Other: Hyperinsulinemic Hyperglycemic Clamp
Glucose Clamp

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Endothelial function and fibrinolytic balance
Time Frame: 2 years
2 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Vanderbilt University

Collaborators

National Heart, Lung, and Blood Institute (NHLBI)

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

October 1, 2006

Primary Completion (Actual)

December 1, 2009

Study Completion (Actual)

December 1, 2010

Study Registration Dates

First Submitted

December 13, 2007

First Submitted That Met QC Criteria

December 13, 2007

First Posted (Estimate)

December 17, 2007

Study Record Updates

Last Update Posted (Estimate)

December 11, 2014

Last Update Submitted That Met QC Criteria

December 10, 2014

Last Verified

December 1, 2014

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • IRB#060227-SCCOR-Q1
  • RFAHL04016

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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