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Oculus

Abstract #82877 Published in IGR 20-4

Antioxidant status in rabbit aqueous humor after instillation of ascorbyl laurate-based nanostructures

Aillegas NA; Tártara LI; Caballero G; Campana V; Allemandi DA; Palma SD
Pharmacological Reports 2019; 71: 794-797


ABTRACT: BACKGROUND: The aim of this work was evaluate the antioxidant effect of ascorbyl laurate (ASC12) based nanostructures applied topically to the cornea of ocular normotensive and hypertensive rabbits. The ASC12 was chosen for its capacity to form liquid lyotropic crystal and keeps its free radical trapping power. METHODS: The hypertension model was performed in six rabbits and was obtained by the application of intracameral injections of alpha-chymotrypsin in the right eye. A single 50 ml dose of ascorbyl laurate coagel 2% w/v (COA-ASC12) was applied topically to the cornea of six normotensive and six hypertensive rabbits. The aqueous humor samples were obtained before and after instillation of COA-ASC12 at different times (2 h and 4 h). Antioxidant capacity was determined via the reduction reaction with iron and tripyridyltriazine (FRAP) and the total proteins were measured using the Bradford reagent. RESULTS: The kinetic antioxidant capacity in the aqueous humor of normotensive and hypertensive rabbits showed a maxim increment at 4 h instillation. Also, the antioxidant capacity in the aqueous humor of hypertensive rabbits was ten times lower than in normotensive rabbits. CONCLUSION: This type of nanostructures has the potential to significantly improve the topical formulation for the prophylaxis and treatment of several eye diseases.

Unidad de Investigación y Desarrollo en Tecnología Farmacéutica (UNITEFA), CONICET - Departamento de Farmacia, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, Argentina.

Full article

Classification:

11.14 Investigational drugs; pharmacological experiments (Part of: 11 Medical treatment)
3.8 Pharmacology (Part of: 3 Laboratory methods)
5.3 Other (Part of: 5 Experimental glaucoma; animal models)



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