Naslov
Development and characterization of mucoadhesive PHEA-TGA microspheres

Autori
Bubenik Biličić, Mirela ; Filipović-Grčić, Jelena ; Hafner, Anita ; Zorc, Branka ; Cetina-Čižmek, Biserka

Izvornik
Journal of Drug Delivery Science and Technology (1773-2247) 16 (2006), 5; 339-343

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
PHEA; PHEA-TGA; thiomer; microspheres; mucoadhesion; spray-drying; loratadine

Sažetak
The mucoadhesive polymers can assure an intimate and prolonged contact of drug delivery systems to the adsorbing mucosa by weak non-covalent bonding (traditional polymers) or by covalent bonding to the mucus layer via thiol-disulfide exchange reactions with cysteine-rich mucin glycoproteins (thiomers). In this study the preparation of drug loaded microparticles made of PHEA-thioglycolic acid conjugate (PHEA-TGA), a new thiomer of polyaspartamide type, has been studied. Empty microspheres and physical mixtures were also prepared for comparison. The microspheres were produced by spray-drying technique and characterized in terms of morphology, drug content, particle size, termal behaviour and bioadhesive properties. In vitro drug release studies were performed in simulated nasal fluid, pH 6.4. The dissolution rate of loratadine was strongly improved by incorporation in microparticles in respect to pure loratadine and corresponding loratadine/PHEA-TGA physical mixtures. Tensile studies showed that mucoadhesive properties of drug loaded microparticles were comparable to empty microspheres.

Izvorni jezik
Engleski

Znanstvena područja
Farmacija

POVEZANOST RADA