- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02119689
Vascular Reparative Mechanism in Diabetes (RAAS)
Vascular Reparative Mechanism by ACE2/Ang-(1-7) in Diabetes
The purpose of this research study is to study blood stem cells in diabetic patients and normal patients. We would like to better understand if these cells, called endothelial precursor cells (EPCs), are not working as expected in people with diabetes. We would like to see if the function of these cells can predict the development of diabetic retinopathy.
Diabetic retinopathy is an eye disease associated with diabetes in which the cells of the retina are damaged. It can cause blurred vision, vision loss, blindness or possible bleeding in the retina. Even with current treatments, the quality of life for people with diabetic retinopathy is much reduced.
Study Overview
Status
Conditions
Intervention / Treatment
Study Type
Enrollment (Estimated)
Contacts and Locations
Study Locations
-
-
Alabama
-
Birmingham, Alabama, United States, 35294
- University of Alabama
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Sampling Method
Study Population
Description
Inclusion Criteria:
- Men or women 18 years or older
- 39 type 1 or type 2 diabetic patients
- 13 with mild retinopathy
- 13 with moderate retinopathy
- 13 with severe, nonproliferative retinopathy
- 39 age and sex matched healthy controls
Exclusion Criteria:
- Current pregnancy as evidence by a urine pregnancy test as the blood from a pregnant female will influence the results of the laboratory tests
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Diabetic Patients
Mild, Moderate and Severe Retinopathy
|
measuring CD34 cell function in relation to diabetic retinopathy status
|
Healthy Controls
Age and sex matched Healthy Controls
|
measuring CD34 cell function
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
The ACE/ACE2 ratio within EPC's
Time Frame: up to 216 weeks
|
Peripheral blood of 150cc, approximately 8-10 tablespoons will be collected from a vein in the arm of both diabetic and healthy control patients.
|
up to 216 weeks
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
The balance of the RAS (renin-angiotensin system) within EPCs
Time Frame: up to 216 weeks
|
The Endo-PAT2000 will be used to obtain this measurement.
This is a 15-minute office-based test where a blood-pressure cuff is placed around the arm, inflated and measurements are obtained from a small fingertip monitor
|
up to 216 weeks
|
Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Photography findings
Time Frame: up to 216 weeks
|
The findings from eye photographs will be collected and evaluated from both the diabetic patients and the heallthy control patients.
This will be done at either the patient's yearly visit or at their 6 week follow-up visit.
|
up to 216 weeks
|
Fluorescein angiogram findings
Time Frame: up to 216 weeks
|
The findings from eye photographs will be collected and evaluated from both the diabetic patients and the heallthy control patients.
This will be done at either the patient's yearly visit or at their 6 week follow-up visit.
|
up to 216 weeks
|
Collaborators and Investigators
Investigators
- Principal Investigator: Maria B Grant, MD, University of Alabama at Birmingham
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimated)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 1308798827
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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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