Development of Multilayer Ciprofloxacin Hydrochloride Electrospun Patches for Buccal Drug Delivery

Bacterial infections in the oral cavity can become a serious problem causing pain, sores and swelling for several weeks. This type of infection could be alleviated using mucoadhesive delivery systems, allowing local administration of the antibiotic to inhibit bacterial spreading. This work reports the development of a multilayer antibiotic patch containing ciprofloxacin hydrochloride (CPX)-loaded electrospun fibers for the treatment of such infections. For this, the release kinetics of the CPX-loaded fibers was modulated using different ratios of polyester blends. The selected reservoir layer was analyzed by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), wide angle x-ray scattering (WAXS) and differential scanning calorimetry (DSC). These analyses confirmed the presence and good distribution of the drug in the fibers and that the drug is in an amorphous state within the reservoir layer. To enhance mucoadhesion whilst ensuring drug directionality, the reservoir layer was assembled to a backing and an adhesive layer. This multilayer patch was assessed in terms of in vitro drug release, adhesion and antimicrobial properties. The multilayer strategy showed excellent antimicrobial properties over time and also a strong adhesion patch time in the volunteers for an average of 7 h. These results highlight the capabilities of multilayer electrospun patches as platforms to treat oral infections.

This research was funded by the Spanish Ministry of Science and Universities (project RTI-2018-097249-B-C21), the Valencian Innovation Agency BIOENCAP project (reference number INNCAD00-18-31), the H2020 EU projects FODIAC (reference number 778388), CAPSULTEK (reference number 873827), the CYTED thematic network (code 319RT0576) and BIOINICIA’s internal project ASOPHARM.

Peer reviewed