Vascular Remodeling and the Effects of Angiogenic Inhibition in Diabetic Retinopathy

This study has been completed.
Information provided by:
National Eye Institute (NEI) Identifier:
First received: December 13, 2006
Last updated: November 9, 2010
Last verified: November 2010
The retinal vasculature changes dramatically in patients with diabetic retinopathy especially between non-proliferative and proliferative disease. The retinal vasculature can be imaged and quantified using special dyes. This study will test whether the pattern of the retinal vasculature changes in patients with different levels of diabetic retinopathy can be quantified using computerized image analysis. In addition, the study will evaluate whether new drugs to treat diabetic retinopathy will be able to reverse these vascular changes.

Condition Intervention Phase
Diabetic Retinopathy
Drug: triamcinolone acetonide (Kenalog)
Phase 0

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
Official Title: Vascular Remodeling and the Effects of Angiogenic Inhibition in Diabetic Retinopathy

Resource links provided by NLM:

Further study details as provided by National Eye Institute (NEI):

Primary Outcome Measures:
  • Change in retinal vascular density from baseline on fluorescein angiography

Secondary Outcome Measures:
  • Safety

Estimated Enrollment: 100
Study Start Date: July 2006
Study Completion Date: July 2009
Primary Completion Date: July 2009 (Final data collection date for primary outcome measure)
Detailed Description:

In this study, we are studying whether vascular density decreases during diabetic retinopathy prior to the pathological neovascularization seen in proliferative disease that results in blindness in more than 50 percent of patients, and whether the adverse, early vascular remodeling and neovascularization can be reversed by anti-angiogenic therapeutics. We have shown that vascular density decreases during early stages of diabetic retinopathy, prior to the pathological neovascularization that defines proliferative retinopathy, and that this change may be reversible with new anti-angiogenic therapeutics. To test this hypothesis we will determine (1) how blood vessels remodel and whether vascular density truly decreases during diabetic retinopathy and (2) how the anti-angiogenic steroid triamcinolone acetonide affects vascular density and pattern during human diabetic retinopathy and in our experimental model, the avian CAM model.

Twenty patients (n = 20) for each of the 4 NPDR stages will be enrolled. In addition, a control group of 20 normal subjects will be recruited from the same clinical practice that do not have diabetes and no evidence of any vascular disease, for a total of 100 patients in the clinical trial.


Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

- Presence of mild, moderate, severe, or very severe non-proliferative diabetic retinopathy (defined as ETDRS level >10) in at least one eye (based on ETDRS criteria)

Exclusion Criteria:

  • Any condition that might impair the patient's ability to give informed consent
  • Any condition or media opacity that might impair the patient's ability to perform vision tests, color fundus photographs or fluorescein angiography
  • Severe allergy or other contraindication to sodium fluorescein dye
  • Participating in any other ophthalmic clinical trial
  Contacts and Locations
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Please refer to this study by its identifier: NCT00411333

United States, Ohio
Cole Eye Institute
Cleveland, Ohio, United States, 44195
Sponsors and Collaborators
National Eye Institute (NEI)
Principal Investigator: Peter K Kaiser, MD Cole Eye Institute
  More Information

Publications: Identifier: NCT00411333     History of Changes
Other Study ID Numbers: R01 EY017528-0 
Study First Received: December 13, 2006
Last Updated: November 9, 2010
Health Authority: United States: Federal Government

Keywords provided by National Eye Institute (NEI):
diabetic retinopathy
fluorescein angiography

Additional relevant MeSH terms:
Diabetic Retinopathy
Retinal Diseases
Vascular Remodeling
Cardiovascular Diseases
Diabetes Complications
Diabetes Mellitus
Diabetic Angiopathies
Endocrine System Diseases
Eye Diseases
Pathologic Processes
Pathological Conditions, Anatomical
Vascular Diseases
Triamcinolone Acetonide
Triamcinolone diacetate
Triamcinolone hexacetonide
Anti-Inflammatory Agents
Enzyme Inhibitors
Hormones, Hormone Substitutes, and Hormone Antagonists
Immunologic Factors
Immunosuppressive Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs processed this record on May 23, 2016