Abstract：
:The aim of the current study was to improve the knowledge of drug-glycol-phospholipid-interactions and their effects in lamellar vesicle suitability as drug delivery systems. Liposomes were prepared using hydrogenated soy phosphatidylcholine (P90H, 60 mg/ml) and diclofenac sodium salt at two concentrations (5-10 mg/ml). To obtain innovative vesicles two permeation enhancers with glycol group, diethyleneglycol monoethyl ether and propylene glycol, were added to the water phase at different ratios (5%, 10%, and 20%). Vesicle organization was deeply investigated by physico-chemical characterization, including differential scanning calorimetry and small-angle diffraction signal analysis while macroscopic structure behavior was evaluated by rheological studies. Results evidenced that the presence of the penetration enhancer and diclofenac sodium salt led to structural rearrangements within and among vesicles forming a tridimensional and complex architecture in which vesicles were closely packed and interconnected. This new design allowed a change in the physical state of dispersions that became highly viscous liquid or soft-solid-like, thus forming an ideal system for topical application able of both adhering to the skin and delivering the drug.
journal_name
Int J Pharmjournal_title
International journal of pharmaceuticsauthors
Castangia I,Manca ML,Matricardi P,Sinico C,Lampis S,Fernàndez-Busquets X,Fadda AM,Manconi Mdoi
10.1016/j.ijpharm.2013.08.034subject
Has Abstractpub_date
2013-11-01 00:00:00pages
1-9issue
1eissn
0378-5173issn
1873-3476pii
S0378-5173(13)00767-9journal_volume
456pub_type
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