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Challenges and Future Prospects for the Delivery of Biologics: Oral Mucosal, Pulmonary, and Transdermal Routes
Department of Pharmaceutical Science and Technology, School of Chemical and Pharmaceutical Sciences, University of Chile, Santiago.ORCID iD: 0000-0002-3190-2168
Division of Pharmaceutics, College of Pharmacy, The University of Texas at Austin.
Division of Pharmaceutics, College of Pharmacy, The University of Texas at Austin.
Division of Pharmaceutics, College of Pharmacy, The University of Texas at Austin.
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2017 (English)In: AAPS Journal, ISSN 1550-7416, E-ISSN 1550-7416, Vol. 19, no 3, 652-668 p.Article in journal (Refereed) Published
Abstract [en]

Biologic products are large molecules such as proteins, peptides, nucleic acids, etc., which have already produced many new drugs for clinical use in the last decades. Due to the inherent challenges faced by biologics after oral administration (e.g., acidic stomach pH, digestive enzymes, and limited permeation through the gastrointestinal tract), several alternative routes of administration have been investigated to enable sufficient drug absorption into systemic circulation. This review describes the buccal, sublingual, pulmonary, and transdermal routes of administration for biologics with relevant details of the respective barriers. While all these routes avoid transit through the gastrointestinal tract, each has its own strengths and weaknesses that may be optimal for specific classes of compounds. Buccal and sublingual delivery enable rapid drug uptake through a relatively permeable barrier but are limited by small epithelial surface area, stratified epithelia, and the practical complexities of maintaining a drug delivery system in the mouth. Pulmonary delivery accesses the highly permeable and large surface area of the alveolar epithelium but must overcome the complexities of safe and effective delivery to the alveoli deep in the lung. Transdermal delivery offers convenient access to the body for extended-release delivery via the skin surface but requires the use of novel devices and formulations to overcome the skin’s formidable stratum corneum barrier. New technologies and strategies advanced to overcome these challenges are reviewed, and critical views in future developments of each route are given.

Place, publisher, year, edition, pages
2017. Vol. 19, no 3, 652-668 p.
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Other Health Sciences
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Health Science
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URN: urn:nbn:se:ltu:diva-64383DOI: 10.1208/s12248-017-0054-zScopus ID: 2-s2.0-85012302294OAI: oai:DiVA.org:ltu-64383DiVA: diva2:1114064
Available from: 2017-06-22 Created: 2017-06-22 Last updated: 2017-11-29Bibliographically approved

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Morales, Javier O.

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