1 resultado para Pharmaceuticals formulations
em Universita di Parma
Filtro por publicador
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Resumo:
Hyaluronan (HA) plays an important role in lung pathophysiology. For this reason it has attracted great attention both as active ingredient and as excipient in treating lung diseases by direct pulmonary HA administration. The aim was the production of highly respirable and flowable HA powders either as a potential carrier for drug delivery or for being delivered directly by inhalation. Engineered sodium hyaluronate powders were produced by spray-drying technique. All the spray-dried powders were characterised in terms of particle size distribution, drug content, morphology and in vitro respirability. HA was successfully formulated with salbutamol sulphate in combination with leucine and highlighted remarkable aerodynamic performance (emitted dose equal to 83 % and FPF % equal to 97.1%). Moreover, HA colloidal solutions were designed and they were spray-dried. In order to improve particle aerodynamic characteristics, different types of excipients were investigated. In particular, stearylamine (5% w/w) allowed to obtain the best performance throughout the experimental set. Finally, in vitro biocompatibility was carried out by MTT assay and High Content Analysis for selected dry powder formulations and starting materials. The assays demonstrated the same outcome by confirming the HA biocompatibility and by producing the same rank of toxicity for the surfactants. The general conclusion of the project is that formulation containing HA and stearyl alcohol represents the best performing formulation.