This study was conducted to investigate a method of gene therapy for proliferative vitreoretinopathy (PVR) by inhibiting type β transforming growth factor (TGF-β). PVR was induced in pigmented rabbits by intravitreal injection of 50 000 rabbit conjunctival fibroblasts after vitrectomy. Subsequently, the eyes received an intravitreal application of adenovirus vector encoding a soluble type II TGF-β receptor (AdTβ-ExR, n = 10) or adenoviral vector expressing β-galactosidase (AdLacZ) (n = 10) or balanced salt solution (BSS) (n = 6). The eyes were examined ophthalmoscopically for 28 days after surgery, and the clinical stage of PVR was evaluated on a scale of zero to five. Histological examinations were performed on the treated eyes on day 28. All control eyes injected with AdLacZ or BSS developed PVR, characterized by retinal detachment and the formation of intravitreal membranes within 7 days. The eyes injected with AdTβ-ExR also developed features of PVR, but the average severity from day 5 to day 28 was significant lower than in the control eyes (P < 0.05). TGF-β plays an important role in PVR progression in a PVR model, and prevention of TGF-β signaling could be therapeutically useful.
All Science Journal Classification (ASJC) codes
- Molecular Medicine
- Molecular Biology