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          Institute: MPI für Herz- und Lungenforschung (W. G. Kerckhoff Institut)     Collection: Yearbook 2016     Display Documents

ID: 724002.0, MPI für Herz- und Lungenforschung (W. G. Kerckhoff Institut) / Yearbook 2016
Systematic aging of degradable nanosuspension ameliorates vibrating-mesh nebulizer performance
Authors:Dalla-Bona, A. C.; Schmehl, T.; Gessler, T.; Seeger, W.; Beck-Broichsitter, M.
Date of Publication (YYYY-MM-DD):2015
Title of Journal:Drug Dev Ind Pharm
Issue / Number:10
Start Page:1704
End Page:1709
Audience:Not Specified
Abstract / Description:CONTEXT: The process of vibrating-mesh nebulization is affected by sample physicochemical properties. Exemplary, electrolyte supplementation of diverse formulations facilitated the delivery of adequate aerosols for deep lung deposition. OBJECTIVE: This study addressed the impact of storage conditions of poly(lactide-co-glycolide) nanosuspension on aerosol properties when nebulized by the eFlow(R)rapid. MATERIALS AND METHODS: First, purified nanosuspensions were supplemented with electrolytes (i.e. sodium chloride, lactic and glycolic acid). Second, the degradable nanoparticles (NP) were incubated at different temperatures (i.e. 4, 22 and 36 degrees C) for up to two weeks. The effect of formulation supplementation and storage on aerosol characteristics was studied by laser diffraction and correlated with the sample conductivity. RESULTS AND DISCUSSION: Nebulization of purified nanosuspensions resulted in droplet diameters of >7.0 microm. However, electrolyte supplementation and storage, which led to an increase in sample conductivity (>10-20 microS/cm), were capable of providing smaller droplet diameters during vibrating-mesh nebulization (</=5.0 microm). No relevant change of NP properties (i.e. size, morphology, remaining mass and molecular weight of the employed polymer) was observed when incubated at 22 degrees C for two weeks. CONCLUSION: Sample aging is an alternative to electrolyte supplementation in order to ameliorate the aerosol characteristics of degradable NP formulations when nebulized by vibrating-mesh technology.
Free Keywords:Aerosol; hydrolytic degradation; nanoparticles; poly(lactide-co-glycolide); pulmonary drug delivery; vibrating-mesh nebulizer
External Publication Status:published
Document Type:Article
Communicated by:n.n.
Affiliations:MPI für physiologische und klinische Forschung
Identifiers:ISSN:1520-5762 (Electronic) 0363-9045 (Linking) %R 10.3109/03639045.2014.993399
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