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Engineering of poly(DL-lactic-co-glycolic acid) nanocomposite particles for dry powder inhalation dosage forms of insulin with the spray-fluidized bed granulating system

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The objective of the present research is to develop a new particulate preparation process for dry powder inhalation by which peptide-loaded poly(DL-lactic-co-glycolic acid) nanospheres are granulated with sugar alcohol (mannitol, around 4 μm in diameter). A spray-drying fluidized bed granulator was used to form soft matrix composite granules. A nanosphere suspension can be readily obtained by dispersing the composite granules in distilled water. The composite granules showed inhalation performance superior to that of freeze-dried nanosphere powder. More than 50% of composite granules were delivered to the bronchioles and alveoli of a rat. The composite granules of insulin-loaded nanosphere have a strong and prolonged pharmacological effect compared to the inhalation of insulin solution.

Affiliations: 1: Department of Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, 1-100, Kusumoto, Chikusa, Nagoya 464-8650, Japan; 2: Laboratory of Pharmaceutical Engineering, Gifu Pharmaceutical University, 5-6-1 Mitahora-higashi, Gifu 502-8585, Japan; 3: Hosokawa Powder Technology Research Institute, 1-9 Shoudaitajika, Hirakata, Osaka 573-1132, Japan

10.1163/156855207780208592
/content/journals/10.1163/156855207780208592
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/content/journals/10.1163/156855207780208592
2007-03-01
2016-09-30

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