Medicated polymer systems based on branched PLGA derivatives

Charles University, Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical technology Candidate Mgr. Juraj Martiška Supervisor doc. RNDr. Milan Dittrich, CSc. Title of Doctoral Thesis Medicated polymer systems based on branched PLGA derivatives This work is focused on the use of originally synthesized poly(DL lactic-co-glycolic acid) (PLGA) derivatives with relatively low molar mass, and linear, star, or comb architecture as promising biodegradable carriers for prolonged or targeted drug release systems. Thermal properties of these polyesters were evaluated by thermogravimetric analysis and differential scanning calorimetry. Polyesters were used for nanoparticles formulation by nanoprecipitation method, which has been optimized with emphasis on organic solvent selection, polyester concentration, phase mixing speed, and stabilizer selection. After method optimization, nanoparticles with encapsulated terbinafine, a typical drug of the BCS class II, were prepared. Multiple parameters such as particles size, polydispersity index, zeta potential, encapsulation efficiency, loading capacity, and morphology were monitored. Spherical morphology was observed using scanning electron microscopy. The hydrophobicity and the polyester concentration revealed the main impact on the nanoparticles size..