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Noriega-Fernandes B, Malmlöf M, Nowenwik M, Gerde P, Corvo ML, Costa E. Dry powder inhaler formulation comparison: Study of the role of particle deposition pattern and dissolution. Int J Pharm 2021; 607:121025. [PMID: 34418472 DOI: 10.1016/j.ijpharm.2021.121025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 08/12/2021] [Accepted: 08/16/2021] [Indexed: 10/20/2022]
Abstract
The composition, morphology and dissolution profile of particles and micro-sized agglomerates delivered upon inhalation may have a significant impact on the product clinical effect. However, although several efforts are ongoing, a methodology that considers deposition structures and dissolution performance evaluation in a biorelevant set-up is not yet standardized. The goal of this work is to apply a collection and dissolution methodology able to discriminate dry powder inhaler (DPI) formulations in terms of deposition structures and dissolution profile in vitro. Hence, Fluticasone Propionate (FP) engineered particles and formulated products (used as a case study) were collected employing a breath simulator and characterized regarding (i) aerodynamic particle size distribution; (ii) deposited microstructures; and (iii) dissolution/absorption profiles using the DissolvIt® bio-relevant dissolution equipment. The results indicated that the particle engineering technology had an impact on the generated and deposited microstructures, here associated to the differences on surface properties of jet milled and wet polished particles quantified by the specific surface area. Differences on surface properties modulate particle interactions, resulting in agglomerates of drug substance and excipient upon actuation with significant different morphologies, observed by microscope, as well as quantified by Marple cascade impactor. These observations allow for a further understanding of the DPI aerosolization and deposition mechanisms. The dissolution and absorption assessment indicates that the presence of lactose may accelerate the drug substance dissolution kinetics, and the FP dissolution can be significantly enhanced when formulated as a spray-dried dispersion particle. Ultimately, the results suggest dissolution testing can be an essential tool to both optimize an innovator DPI and de-risk generics development.
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Affiliation(s)
- Beatriz Noriega-Fernandes
- Hovione Farmaciência S.A., R&D Inhalation & Advanced Drug Delivery, Estrada do Lumiar, Campus do Lumiar, Edifício R, 1649-038 Lisbon, Portugal; iMed.ULisboa, Faculdade de Farmácia, Universidade de Lisboa, Avenida Prof. Gama Pinto, Lisboa 1649-003, Portugal.
| | - Maria Malmlöf
- Inhalation Sciences, Hälsovägen 7-9, 141 57 Huddinge, Sweden; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
| | | | - Per Gerde
- Inhalation Sciences, Hälsovägen 7-9, 141 57 Huddinge, Sweden; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
| | - M Luisa Corvo
- iMed.ULisboa, Faculdade de Farmácia, Universidade de Lisboa, Avenida Prof. Gama Pinto, Lisboa 1649-003, Portugal.
| | - Eunice Costa
- Hovione Farmaciência S.A., R&D Inhalation & Advanced Drug Delivery, Estrada do Lumiar, Campus do Lumiar, Edifício R, 1649-038 Lisbon, Portugal.
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