title: Terbinafine Hydrochloride Trans-ungual Delivery via Nanovesicular Systems: In Vitro Characterization and Ex Vivo Evaluation.
abstract: Treating a nail infection like onychomycosis is challenging as the human nail plate acts as a formidable barrier against all drug permeation. Available oral and topical treatments have several setbacks. Terbinafine hydrochloride (TBH), belonging to the allylamine class, is mainly used for treatment of onychomycosis. This study aims to formulate TBH in a nanobased spanlastic vesicular carrier that enables and enhances the drug delivery through the nail. The nanovesicles were formulated by ethanol injection method, using either Span® 60 or Span® 65, together with Tween 80 or sodium deoxycholate as an edge activator. A full factorial design was implemented to study the effect of different formulation and process variables on the prepared TBH-loaded spanlastic nanovesicles. TBH entrapment efficiency percentages, particle size diameter, percentage drug released after 2 h and 8 h were selected as dependent variables. Optimization was performed using Design-Expert® software to obtain an optimized formulation with high entrapment efficiency (62.35 ± 8.91%), average particle size of 438.45 ± 70.5 nm, and 29.57 ± 0.93 and 59.53 ± 1.73% TBH released after 2 and 8 h, respectively. The optimized formula was evaluated using differential scanning calorimetry and X-ray diffraction and was also morphologically examined using transmission electron microscopy. An ex vivo study was conducted to determine the permeation and retainment of the optimized formulation in a human cadaver nail plate, and confocal laser scanning microscope was used to show the extent of formulation permeation. In conclusion, the results confirmed that spanlastics exhibit promising results for the trans-ungual delivery of TBH.
authors.affiliation: Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, Egypt.
authors.forename: Noha Ibrahim
authors.initials: NI
authors.lastname: Elsherif
authors.affiliation: Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, Egypt. rehab_shamma@hotmail.com.
authors.forename: Rehab Nabil
authors.initials: RN
authors.lastname: Shamma
authors.affiliation: Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, Egypt.
authors.forename: Ghada
authors.initials: G
authors.lastname: Abdelbary
mesh_terms: D000287:Administration, Topical; D000935:Antifungal Agents / Q000008:administration & dosage / Q000737:chemistry*; D002626:Chemistry, Pharmaceutical / Q000379:methods; D003840:Deoxycholic Acid / Q000737:chemistry; D004337:Drug Carriers / Q000737:chemistry*; D016503:Drug Delivery Systems / Q000379:methods; D006801:Humans; D009262:Nails / Q000187:drug effects* / Q000382:microbiology; D049329:Nanostructures / Q000737:chemistry*; D009281:Naphthalenes / Q000008:administration & dosage* / Q000737:chemistry*; D014009:Onychomycosis / Q000188:drug therapy; D010316:Particle Size; D010539:Permeability / Q000187:drug effects; D011136:Polysorbates / Q000737:chemistry; D000077291:Terbinafine
chemical_list: D000935:Antifungal Agents; D004337:Drug Carriers; D009281:Naphthalenes; D011136:Polysorbates; D003840:Deoxycholic Acid; D000077291:Terbinafine
keywords: confocal laser scanning microscope; onychomycosis; spanlastics; terbinafine hydrocholride; trans-ungual delivery