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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | García-Gómez, Pío J. Dotor, Javier García-Layana, Alfredo Zarranz-Ventura, Javier Recalde, Sergio Fernández-Robredo, Patricia Salinas-Alamán, Angel Borrás-Cuesta, Francisco |
| Description | Author Affiliation: Recalde S ( Experimental Ophthalmology Laboratory.) |
| Abstract | PURPOSE: To assess the effect of transforming growth factor (TGF)-ß inhibitor peptides (P17 and P144) on the development of laser-induced choroidal neovascularization (LI-CNV) in a rat model. METHODS: Sixty-one Long-Evans rats underwent diode LI-CNV model. Forty-eight hours later, treatment was administered. The intravenous control group (IV-control) and intravenous P17 group (IV-17) received five doses (0.2 mg every 72 hours) of vehicle and P17, respectively. Four groups received intravitreal injections of P17 low-dose (LD-17; 1 mg/mL) and high-dose (HD-17; 20 mg/mL) and P144 low-dose (LD-144; 1 mg/mL) and high-dose (HD-144; 3 mg/mL), and fellow eyes received vehicle. CNV evolution was assessed weekly by fluorescein angiography (FA). After death, VEGF, TGF-ß and PDGF protein levels were measured by ELISA in RPE and retina homogenates. Data were analyzed with commercially available statistical analysis software. RESULTS: The mean CNV area, measured in pixels, was significantly lower at the second and fourth weeks in IV-17 (P < 0.05) and from the second week in HD-17 (P < 0.05), whereas LD-144 and HD-144 showed significant differences at every time point (P < 0.05). LD-17 showed significantly lower protein levels of TGF-ß in retina and PDGF in RPE (P < 0.05), whereas HD-17 showed lower levels of VEGF (RPE and retina; P < 0.05), TGF-ß (RPE and retina; P < 0.05), and PDGF (RPE; P < 0.05). HD-144 showed lower VEGF levels in the retina (P < 0.05). CONCLUSIONS: TGF-ß inhibition with these peptides represents a promising new therapeutic line for CNV targeting a different pathway than current therapies. More studies are needed to assess this effect on early CNV, alone or in combination with anti-VEGF. |
| ISSN | 01460404 |
| e-ISSN | 15525783 |
| Journal | Investigative Opthalmology & Visual Science |
| Issue Number | 10 |
| Volume Number | 52 |
| Language | English |
| Publisher | Association for Research in Vision and Ophthalmology |
| Publisher Date | 2011-09-09 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Choroidal Neovascularization Drug Therapy Disease Models, Animal Peptide Fragments Pharmacology Peptides Transforming Growth Factor Beta Antagonists & Inhibitors Animals Metabolism Pathology Enzyme-linked Immunosorbent Assay Fluorescein Angiography Injections, Intravenous Intravitreal Injections Laser Coagulation Lasers, Semiconductor Platelet-derived Growth Factor Rats, Long-evans Receptors, Transforming Growth Factor Beta Vascular Endothelial Growth Factor A Research Support, Non-u.s. Gov't Discipline Ophthalmology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ophthalmology Sensory Systems Cellular and Molecular Neuroscience |
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