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| ID | Type | Description | Link |
|---|---|---|---|
| IRB# 09-954 | Other Identifier | Wills Eye Health System IRB |
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You are being asked to be in a research study to determine blood levels and vitreous levels of compounds called thrombospondin 1 (TSP1) and pigment epithelium derived factor (PEDF). These compounds exists naturally in your body.
The hypothesis tested here is that diabetic patients that express the higher molecular weight pigment epithelium-derived factor (PEDF) isoform have lower thrombospondin-1 (TSP1) level and, as a result, are at a greater risk for the development of more severe diabetic retinopathy.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Blood draw | Blood (approximately equal to 3 to 4 tablespoons) will be drawn at the Wills Eye Institute, 1 time. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Blood draw | Biological | 3-4 tablespoons of blood will be drawn, one time. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Level of thrombospondin (TSP1) and pigment epithelium derived factor (PEDF) in the vitreous and plasma | Your voluntary participation in this study may help determine how different TSP1 and PEDF levels correlate with diabetic eye disease. | up to 6 months |
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Inclusion Criteria:
Exclusion Criteria:
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Patients with diabetes mellitus who are undergoing pars plana vitrectomy for any reason
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| Name | Affiliation | Role |
|---|---|---|
| Marc Spirn, M.D. | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Mid Atlantic Retina- Wills Eye Institute | Philadelphia | Pennsylvania | 19107 | United States |
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| ID | Term |
|---|---|
| D003920 | Diabetes Mellitus |
| ID | Term |
|---|---|
| D044882 | Glucose Metabolism Disorders |
| D008659 | Metabolic Diseases |
| D009750 | Nutritional and Metabolic Diseases |
| D004700 | Endocrine System Diseases |
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| ID | Term |
|---|---|
| D001800 | Blood Specimen Collection |
| ID | Term |
|---|---|
| D013048 | Specimen Handling |
| D019411 | Clinical Laboratory Techniques |
| D019937 | Diagnostic Techniques and Procedures |
| D003933 | Diagnosis |
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The level of TSP1 and PEDF in the vitreous and plasma.
| D011677 | Punctures |
| D013514 | Surgical Procedures, Operative |
| D008919 | Investigative Techniques |