Abstract
This study evaluated the feasibility of ciprofloxacin nanocrystals dry powder inhalations (DPIs) co-delivered with N-acetylcysteine (NAC) to improve the drug permeability and pulmonary bioavailability. The NAC could be reducing the viscosity of the sputum and causing it to liquefy, by breaks DNA fibers in sputum and purulent sputum. The ciprofloxacin nanocrystals, stabilized by 1, 2-distearoyl-sn-glycero-3-phosphoethanolamine grafted N-[methoxy (polyethylene glycols)-2000] (DSPE-mPEG2000), was prepared by anti-solvent precipitation technology. The powder contained ciprofloxacin nanocrystals and N-acetyl-cysteine was obtained as a result of freeze-drying and spray-drying, respectively. The powder was coupled with inhaled lactose and the DPI of ciprofloxacin nanocrystals/NAC co-delivery system was obtained. The in vitro characteristics, including particle size and distribution, morphology, crystalline state, stability, flowability, aerosol performance, and in vivo image were evaluated. The spray-dried DPI of ciprofloxacin nanocrystals/NAC co-delivery system exhibited stratified in vitro and in vivo aerosol performance. This study demonstrated that spray-dried DPI system with a synergistic effect and meanwhile a better flowability is desirable for enhanced pulmonary drug delivery without severe lung injury.
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Abbreviations
- DPIs:
-
Dry powder inhalations
- DPI:
-
Dry powder inhaler
- NAC:
-
N-acetyl-cysteine
- DSPE-mPEG2000:
-
1,2-Distearoyl-sn-glycero-3-phosphoethanolamine grafted N-[methoxy (polyethylene glycols)-2000]
- MIC:
-
Minimum inhibitory concentration
- MDI:
-
Metered-dose inhaler
- CPFX:
-
Ciprofloxacin
- NCFB:
-
Non-cystic fibrosis bronchiectasis
- mPEG2000:
-
Methoxy-polyethylene glycols-2000
- DSPE:
-
1,2-Distearoyl-sn-glycero-3-phosphoethanolamine
- PVP K-30:
-
Polyvinylpyrrolidone K-30
- CDI:
-
N,N′-Carbonyldiimidazole
- DMAP:
-
4-Dimethylaminopyridine
- DiR:
-
1,1-Dioctadecyl-3,3,3,3-tetramethylindotricarbocyaine iodide
- FTIR:
-
Fourier transform infrared spectroscopy
- 1H NMR:
-
1H-nuclear magnetic resonance
- DLS:
-
Dynamic light scattering
- PDI:
-
Polydispersity index
- TEM:
-
Transmission electron microscope
- CI:
-
Carr’s index
- SEM:
-
Scanning electron microscope
- XRPD:
-
X-ray powder diffractometer
- DSC:
-
Differential scanning calorimetry
- TGA:
-
Thermogravimetric analysis
- TSI:
-
Twin stage impinger
- ED:
-
Emitted dose
- RD:
-
Recovered dose
- FPF:
-
Fine particle fraction
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This work was supported by the Shandong Provincial Natural Science Foundation (ZR2019MH105), the projects of “20 Colleges and Universities” in Jinan (2019GXRC068).
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Guan, W., Liu, Y., Ding, S. et al. Ciprofloxacin nanocrystals and N-acetylcysteine co-solidified powders for pulmonary drug delivery: development and in vitro and in vivo characterization. J Nanopart Res 24, 41 (2022). https://doi.org/10.1007/s11051-022-05427-1
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DOI: https://doi.org/10.1007/s11051-022-05427-1