Development of thiolated poly(acrylic acid) microparticles for the nasal administration of exenatide (CROSBI ID 232086)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Millotti, Gioconda ; Vetter, Anja ; Leithner, Katharina ; Sarti, Federica ; Bano, Gul Shahnaz ; Augustijns, Patrick ; Bernkop-Schnuerch, Andreas
engleski
Development of thiolated poly(acrylic acid) microparticles for the nasal administration of exenatide
The purpose of this study was to develop a microparticulate formulation for nasal delivery of exenatide utilizing a thiolated polymer. Poly(acrylic acid)-cysteine (PAA-cys) and unmodified PAA microparticles loaded with exenatide were prepared via coprecipitation of the drug and the polymer followed by micronization. Particle size, drug load and release of incorporated exenatide were evaluated. Permeation enhancing properties of the formulations were investigated on excised porcine respiratory mucosa. The viability of the mucosa was investigated by histological studies. Furthermore, ciliary beat frequency (CBF) studies were performed. Microparticles displayed a mean size of 70–80 mm. Drug encapsulation was 80% for both thiolated and non-thiolated microparticles. Exenatide was released from both thiolated and non-thiolated particles in comparison to exenatide in buffer only within 40 min. As compared to exenatide dissolved in buffer only, non-thiolated and thiolated microparticles resulted in a 2.6- and 4.7-fold uptake, respectively. Histological studies performed before and after permeation studies showed that the mucosa is not damaged during permeation studies. CBF studies showed that the formulations were cilio-friendly. Based on these results, poly(acrylic acid)-cysteine-based microparticles seem to be a promising approach starting point for the nasal delivery of exenatide
exenatide ; microparticles ; nasal delivery ; thiolated polymers
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Podaci o izdanju
40 (12)
2014.
1677-1682
objavljeno
0363-9045
10.3109/03639045.2013.842578