Diabetic Retinopathy, Iris Neovascularization
Conditions
Keywords
VEGF, iris neovascularization, diabetic retinopathy, Macugen
Brief summary
The purpose of this study is to determine if a drug called Macugen may help to stop the growth of abnormal blood vessels on the iris that has occurred in the eye(s) as part of diabetic retinopathy.
Detailed description
Diabetic retinopathy is an eye condition caused by diabetes in which new blood vessels grow on the retina (the back, inside part of the eye) and the iris. These vessels are not normal and may leak or break, causing bleeding in the eye. This process can lead to vision loss or blindness, glaucoma (disease of the eye where eye pressures are usually too high resulting in damage to the optic nerve), or other eye problems. This study is to determine if a drug called Macugen may help to stop the growth of these abnormal blood vessels on the iris.
Interventions
OTHERPegaptanib Sodium Injection/Panretinal Photocoagulation
Pegaptanib Sodium Injection is a single dose prefilled syringe and is formulated as a 3.47 mg/mL solution. Combined with an ocular laser procedure.
PROCEDUREPanretinal Photocoagulation (PRP)
Ocular Laser Procedure
Sponsors
Eyetech Pharmaceuticals
Hermann Eye Center
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Investigator)
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
1. Male or female, at least 18 years of age 2. Diabetic retinopathy with iris neovascularization 3. Visual acuity must be light perception or better in the study eye 4. Female patients of childbearing potential must have a negative urine pregnancy test at the screening visit. 5. Written informed consent has been obtained 6. Written authorization for use and release of health and research study information has been obtained
Exclusion criteria
1. Neovascular glaucoma ( a difficult form of glaucoma to control that leads to a painful eye with high intraocular pressure, corneal swelling, and cell and flare in the anterior chamber. Caused by abnormal new blood vessel formation (neovascularization) on the iris, that extends over trabecular meshwork causing closure of angle drainage structures). 2. No light perception in the study eye. 3. Inadequate view of retina for PRP/angiography 4. Anterior chamber intraocular lens implant 5. PRP treatment in the past 60 days. Patients may participate if the PRP treatment is beyond 60 days and has newly diagnosed NVI or has nonregression of previously diagnosed NVI. 6. Previous or current Macugen use 7. Any active ocular infection 8. Any conditions which precludes patients ability to comply with study requirements including completion of the study 9. Female patients who are pregnant, nursing, or planning pregnancy, or who are of childbearing potential and not using a reliable means of contraception 10. Current enrollment in an investigational drug or device study or participation in such a study within 30 days prior to screening 11. Patient has a condition or is in a situation which, in the investigator's opinion, may put the patient at significant risk, may confound the study results or may interfere significantly with the patient's participation in the study
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Regression of iris neovascularization and prevention of development of neovascular glaucoma | prospective |
Secondary
| Measure | Time frame |
|---|---|
| Regression will be determined by lack of leakage and/or lack of flow through the abnormal vessels. | prospective |
| Assessment of retina with dilated fundus examination for signs of neovascularization in posterior segment at each follow-up visit | prospective |
| Iris angiogram - conducted at screening/treatment visit,week 1, week 3, week 6, week 9, week 12, week 15, week 18, and week 52. | prospective |
| A clinically significant reduction in the clock hours of angle neovascularization. | prospective |
| Development of neovascular glaucoma. | prospective |
| The complete resolution of iris neovascularization, or regression to less than 2 clock hours of iris neovascularization. | prospective |
Countries
United States
Outcome results
None listed