title: Nanostructured lipid carriers for triamcinolone acetonide delivery to the posterior segment of the eye.
abstract: Triamcinolone acetonide (TA) is a corticosteroid drug currently administered by intravitreal injection for a broad spectrum of inflammatory, edematous and angiogenic ocular diseases. To increase the drug's bioavailability by ocular instillation, TA was encapsulated in nanostructured lipid carriers (NLC), previously optimized by our group using a factorial design approach. In the present paper, nanometric (∼200 nm), unimodal and negatively charged NLC loaded with the fluorescent lipid marker Nile red (NR-NLC) and drug (TA-NLC) were produced by high pressure homogenization. Based on the selected formulations, in vivo tests were carried out by eye-drop instillation of NR-NLC in mice, revealing the systems' ability of delivering lipophilic actives to the posterior segment of the eye via the corneal and non-corneal pathways. Short and long-term stability of TA-NLC was assessed by high performance stability analysis using the Turbiscan®. The results showed a backscattering of less than 1.5% and during a period of 6 months, anticipated the low tendency of these particles for aggregation during shelf life when stored at room temperature.
authors.affiliation: Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, Barcelona, Spain.
authors.forename: Joana
authors.initials: J
authors.lastname: Araújo
authors.forename: Sasha
authors.initials: S
authors.lastname: Nikolic
authors.forename: Maria A
authors.initials: MA
authors.lastname: Egea
authors.forename: Eliana B
authors.initials: EB
authors.lastname: Souto
authors.forename: Maria L
authors.initials: ML
authors.lastname: Garcia
mesh_terms: D000818:Animals; D002152:Calorimetry, Differential Scanning; D005260:Female; D006801:Humans; D008055:Lipids / Q000737:chemistry*; D051379:Mice; D008856:Microscopy, Fluorescence; D049329:Nanostructures / Q000008:administration & dosage / Q000737:chemistry*; D012160:Retina / Q000378:metabolism*; D014222:Triamcinolone Acetonide / Q000008:administration & dosage*; D014961:X-Ray Diffraction
chemical_list: D008055:Lipids; D014222:Triamcinolone Acetonide