Published in:
01-06-2019 | Bevacizumab | Original Research Article
Corosolic acid: antiangiogenic activity and safety of intravitreal injection in rats eyes
Authors:
Cibele Rodrigues Toledo, Vinícius Viana Pereira, Lays Fernanda Nunes Dourado, Mayara Rodrigues Brandão Paiva, Armando Silva-Cunha
Published in:
Documenta Ophthalmologica
|
Issue 3/2019
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Abstract
Purpose
Investigate the potential application of corosolic acid (CA) in the treatment of diseases causing retinal neovascularization.
Methods
CA cytotoxicity effect was evaluated in ARPE-19 cells by sulforhodamine B colorimetric method, and antiangiogenic activity was studied using chorioallantoic membrane (CAM) assay. An amount of 0.01 mL of CA formulations at 5, 10 and 25 µM was injected in the right eyes of Wistar rats, and the contralateral eyes received the vehicle to verify the safety of ophthalmic use. Electroretinography (ERG) was performed before, 7 and 15 days after CA administration. Animals were killed on the 15th day, and the histological analysis of retina was carried out under light microscopy.
Results
CA did not present cytotoxicity at concentrations below 35.5 μM after 48 h of treatment. The antiangiogenic activity was confirmed by CAM assay, since CA (range from 5 to 25 µM) induced a significant reduction in vascularity without any signs of toxicity. ERG recordings and histological evaluation did not show any signs of retinal toxicity.
Conclusions
CA was effective in reducing vascularity in a CAM model and was found to be safe for potential ophthalmic use.