Mora P Eperon S Felt-Baeyens O Gurny R Sagodira S Breton P Guex-Crosier Y 2005 PURPOSE To assess ex vivo human scleral permeability to triamcinolone acetonide (TA). METHODS The experiments were carried out using scleral samples and a Franz-type vertical diffusion cell. A suspension containing TA was prepared and placed in the donor chamber. The concentration of TA in the receptor chamber was measured by high-performance liquid chromatography (HPLC) assay and expressed as a percentage relative to TA concentration dissolved in the donor chamber. Control experiments using a commercial TA suspension were performed. RESULTS TA (+/-SEM) dissolved in the donor suspension was 10.69 +/- 1.28 microg/ml. The diffusion rate of TA varied from 30% after 1 day to 72% after 4 days, after which equilibrium was reached. The human scleral permeability coefficient (P(s) +/- SEM) was 1.47+/- 0.17 x 10(- 5) cm/s. CONCLUSIONS TA crossed human sclera. The mean amount of drug retained in the sclera increased with time, 4 days being necessary to equilibrate the unidirectional flux. The TA permeability coefficient was comparable to that of other corticosteroids. https://sonar.ch/global/documents/290577 eng info:eu-repo/semantics/altIdentifier/doi/10.1080/02713680590934094 info:eu-repo/semantics/altIdentifier/pmid/16020266 Current eye research. - 2005 Chromatography, High Pressure Liquid Diffusion Glucocorticoids Humans Middle Aged Permeability Sclera Triamcinolone Acetonide Trans-scleral diffusion of triamcinolone acetonide. http://purl.org/coar/resource_type/c_6501