ArticleJournal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques2025
Development of a submicron emulsion-based delivery system to improve the anti-inflammatory activity of urolithin A.
Article in Journal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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11 authors.
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Abstract
Objective: Despite the antioxidant, anti-inflammatory, and anti-cellular-aging activities of urolithin A (UroA), a naturally occurring postbiotic, its high lipophilicity hampers its pharmaceutical application. To overcome this limitation improving its stability and bioavailability, submicron emulsions (S-EMs) were designed. Methods: Nineteen formulations (S-EM 1/S-EM 19) were prepared by two different methodologies. S-EMs were characterized evaluating macroscopical appearance and size distribution by photon correlation spectroscopy (PCS). One selected S-EM was loaded with UroA and characterized by PCS, transmission electron microscopy (TEM), small angle x-ray scattering (SAXS) and Fourier-transform infrared spectroscopy (FT-IR). Z potential, pH and syringeability were evaluated. UroA entrapment was studied efficiency by ultrafiltration and HPLC, while Results: The preformulative study enabled to select method and composition for S-EM preparation. S-EM 18 was selected for UroA loading (SEM-UroA), due to mean diameter, zeta potential, pH and syringeability suitable for intraperitoneal administration. The loading of UroA (0.2 mg/mL) did not influence S-EM physicochemical features, while maintaining technological properties for 3 months. Conclusion: These findings underscore the potential of UroA loaded S-EM as an effective delivery system, demonstrating its superiority over simple UroA suspensions in enhancing the systemic anti-inflammatory effects of the postbiotic.
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