title: Overview and Future Potential of Buccal Mucoadhesive Films as Drug Delivery Systems for Biologics.
abstract: The main route of administration for drug products is the oral route, yet biologics are initially developed as injectables due to their limited stability through the gastrointestinal tract and solubility issues. In order to avoid injections, a myriad of investigations on alternative administration routes that can bypass enzymatic degradation and the first-pass effect are found in the literature. As an alternative site for biologics absorption, the buccal route presents with a number of advantages. The buccal mucosa is a barrier, providing protection to underlying tissue, but is more permeable than other alternative routes such as the skin. Buccal films are polymeric matrices designed to be mucoadhesive properties and usually formulated with permeability enhancers to improve bioavailability. Conventionally, buccal films for biologics are manufactured by solvent casting, yet recent developments have shown the potential of hot melt extrusion, and most recently ink jet printing as promising strategies. This review aims at depicting the field of biologics-loaded mucoadhesive films as buccal drug delivery systems. In light of the literature available, the buccal epithelium is a promising route for biologics administration, which is reflected in clinical trials currently in progress, looking forward to register and commercialize the first biologic product formulated as a buccal film.
authors.affiliation: Department of Pharmaceutical Science and Technology, School of Chemical and Pharmaceutical Sciences, University of Chile, Santos Dumont 964, 4to piso, Of# 09, Independencia, Santiago, 8380494, Chile.|Instituto de Salud Pública de Chile, Santiago, 7780050, Chile.
authors.forename: Miguel
authors.initials: M
authors.lastname: Montenegro-Nicolini
authors.affiliation: Department of Pharmaceutical Science and Technology, School of Chemical and Pharmaceutical Sciences, University of Chile, Santos Dumont 964, 4to piso, Of# 09, Independencia, Santiago, 8380494, Chile. jomorales@ciq.uchile.cl.|Advanced Center for Chronic Diseases (ACCDiS), Santos Dumont 964, 4to piso, Of# 09, Independencia, Santiago, 8380494, Chile. jomorales@ciq.uchile.cl.
authors.forename: Javier O
authors.initials: JO
authors.lastname: Morales
mesh_terms: D000268:Adhesiveness; D000278:Administration, Buccal; D000818:Animals; D001688:Biological Products / Q000008:administration & dosage* / Q000737:chemistry*; D002626:Chemistry, Pharmaceutical / Q000379:methods; D016503:Drug Delivery Systems / Q000379:methods*; D006801:Humans; D009061:Mouth Mucosa / Q000378:metabolism*; D011108:Polymers / Q000737:chemistry
chemical_list: D001688:Biological Products; D011108:Polymers
keywords: biologics; buccal delivery; casting; hot melt extrusion; inkjet printing