Assessement of anti-inflammatory properties of microspheres prepared with chitosan and 5-amino salicylic acid over inflamed caco-2 cells Aguzzi, Carola Ortega, Ángeles Bonferoni, Maria Cristina Sandri, Giuseppina Cerezo González, María Pilar Salcedo, Inmaculada Sánchez Espejo, Rita María Viseras Iborra, César Antonio Caramella, Carla 5-ASA Chitosan Cytokines Inflammation Drug release Spray drying Microspheres based on the interaction between 5-amino salicylic acid (5-ASA) and chitosan were designed as a new colonic delivery system. Microspheres were prepared by a spray drying technique and characterised by physical properties, morphology and drug dissolution characteristics. Effects of the microspheres over inflamed Caco-2 cells were also evaluated, by determining cell viability and expression of mRNA levels of biomarkers involved in the pathogenesis of Inflammatory Bowel Diseases (IBD) (IL-1beta and IL-8). Results showed that chitosan improved dissolution properties of 5-ASA. The amount of free drug released over 120 min did not exceed 9mg/cm2, while microspheres showed a high dissolution rate reaching approximately 50mg/cm2 of drug released. Contact of inflamed cells with free 5-ASA reduced mRNA levels of IL-1beta and IL-8. Microspheres did not show cytotoxic activity and maintained ILs levels observed in non-inflamed cells, mimicking the anti-inflammatory effect of 5-ASA alone. 2025-02-03T10:30:41Z 2025-02-03T10:30:41Z 2011 journal article Aguzzi, C., Ortega, A., Bonferoni, M.C., Sandri, G., Cerezo, P., Salcedo, I., Sánchez, R., Viseras, C., Caramella, C. (2011). Assessement of anti-inflammatory properties of microspheres prepared with chitosan and 5-amino salicylic acid over inflamed Caco-2 cells. Carbohydrate Polymers, 85, 638-644. https://hdl.handle.net/10481/101879 10.1016/j.carbpol.2011.03.027 eng http://creativecommons.org/licenses/by-nc-nd/3.0/ embargoed access Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License