PLA-PEG-PLA copolymer-based polymersomes as nanocarriers for delivery of hydrophilic and hydrophobic drugs: preparation and evaluation with atorvastatin and lisinopril.
Tri-block poly(lactide)-poly(ethylene glycol)-poly(lactide) (PLA-PEG-PLA) copolymers were synthesized and used to prepare polymersomes loaded separately by the hydrophobic and hydrophilic model drugs, atorvastatin and lisinopril, respectively. The resulting nanostructures were characterized by various techniques such as FTIR, DSC, PCS and AFM. The polymersomes exhibited high encapsulation efficiencies of almost 78% and 70.8% for atorvastatin and lisinopril, respectively. Investigation on FTIR and DSC results revealed that such a high encapsulation efficiency is due to strong interaction between atorvastatin and the copolymer. The impact of drug/copolymer ratio and copolymer composition on drug-loading efficiency and drug release behavior were also studied. The results showed that in case of lisinopril, polymersomes exhibited a triphasic drug release, while for atorvastatin a biphasic release profile was obtained. Overall, the results indicated that PLA-PEG-PLA polymersomes can be considered as a promising carrier for both hydrophilic and hydrophobic drugs.
Faculty of Pharmacy, Tabriz University of Medical Sciences , Tabriz , Iran .
H
H
Danafar
K
K
Rostamizadeh
S
S
Davaran
M
M
Hamidi
D000069059:Atorvastatin / Q000008:administration & dosage*; D002152:Calorimetry, Differential Scanning; D002626:Chemistry, Pharmaceutical; D004337:Drug Carriers / Q000737:chemistry; D016503:Drug Delivery Systems; D065546:Drug Liberation; D057927:Hydrophobic and Hydrophilic Interactions; D017706:Lisinopril / Q000008:administration & dosage* / Q000737:chemistry; D049329:Nanostructures; D011091:Polyesters / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared
D004337:Drug Carriers; D011091:Polyesters; D011108:Polymers; C507889:polylactide-polyethylene glycol-polylactide; D011092:Polyethylene Glycols; D000069059:Atorvastatin; D017706:Lisinopril
Atorvastatin; PLA–PEG–PLA; copolymeric drug delivery; lisinopril; polymersomes