Abstract
Intranasal (IN) administration is known to be noninvasive with the potential to carry a drug or vaccine directly to the blood, bypassing first-pass metabolism in the liver and the harsh environment of the gastrointestinal system. Orally administered dibenzoylmethane (DBM) has been shown experimentally to be neuroprotective in animal models of tauopathy and prion disease and effective in the treatment of certain forms of cancers. The purpose of this study was to prepare, characterize, and test formulations of DBM designed for IN administration. DBM was formulated in brain homogenate (BH) and hypromellose and as nanoparticles (NPs). These formulations were detected using UPLC and characterized in solid and suspension states; NPs were also characterized by in vitro cell culture–based studies. Particle size for DBM NP was 163.8 ± 3.2 nm, and in vitro release studies showed 95.80% of DBM was released from the NPs within 8 days. In vitro cell, culture studies suggested no drug uptake until 6 h. A histological analysis of nasal cavity (NC) sections and blood detection studies were carried out 30 min after inhalation. DBM amounting to 40.77 ± 4.93 and 44.45 ± 5.36 ng/mL was detected in the blood of animals administered DBM in polymeric and NP formulation, respectively. Histological studies on NCs confirmed the presence of BH within lymphatic vessels in the lamina propria of each animal; BH was identified traversing the mucosa in 2 animals. Thus, formulations for DBM administered via IN route were successfully designed and characterized and able to cross the nasal mucosa following inhalation.
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This research was supported by a Health Sciences Strategic Investment Fund Faculty Development Grant of Creighton University.
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Vora, D., Kincaid, A.E., Tolman, J. et al. Characterization and Systemic Delivery of Dibenzoylmethane via the Intranasal Route. AAPS PharmSciTech 22, 30 (2021). https://doi.org/10.1208/s12249-020-01904-9
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DOI: https://doi.org/10.1208/s12249-020-01904-9