Minimal amounts of dipalmitoylphosphatidylcholine improve aerosol performance of spray-dried temocillin powders for inhalation
| Autor: | Abdoul Aziz Sanogo, Rita Vanbever, Pierre Eloy, Brieuc Cuvelier, Christine C. Dupont-Gillain, Cristina Loira-Pastoriza, Bernard Ucakar |
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| Rok vydání: | 2015 |
| Předmět: |
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2-Dipalmitoylphosphatidylcholine Pharmaceutical Science Excipient Penicillins Mice chemistry.chemical_compound Administration Inhalation medicine Animals Temocillin Particle Size Solubility Lung Aerosols Chromatography Inhalation Inhaler Dry Powder Inhalers chemistry Dipalmitoylphosphatidylcholine Particle Female Particle size Powders Crystallization medicine.drug |
| Zdroj: | International Journal of Pharmaceutics. 495:981-990 |
| ISSN: | 0378-5173 |
| DOI: | 10.1016/j.ijpharm.2015.10.019 |
| Popis: | Administration of antibiotics by inhalation can greatly improve drug targeting to the site of respiratory infections. In addition, dry powder inhalers are particularly convenient for the patients. The purposes of this study were to demonstrate the interest of pulmonary temocillin delivery to reach high temocillin concentrations locally in the lungs as well as to prepare a spray-dried temocillin powder for inhalation using a minimal amount of generally recognized as safe excipients. Intratracheal instillation of a temocillin solution allowed to reach higher and more sustained drug concentrations in the lungs than intravenous injection in mice, although a 10-fold lower temocillin dose was delivered intratracheally than systemically. A spray-dried powder of pure temocillin presented a fine particle fraction of 9% of the dose loaded in the inhaler. However, the incorporation of 0.5% to 20% of dipalmitoylphosphatidylcholine (DPPC) in the powder increased the fine particle fraction 4- to 5-fold. X-ray photoelectron spectroscopy and X-ray diffraction revealed that DPPC concentrated at the particle surface with its aliphatic chains laterally packed. The minimal amount of DPPC needed to improve the aerosol performance of temocillin supports the use of this excipient in the formulation of cohesive antibiotic powders for inhalation. |
| Databáze: | OpenAIRE |
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