Abstract
Purpose
In this study, cationic mannosylated nanostructured lipid carriers (Man-NLCs) were developed for the targeted delivery of rifampicin to alveolar macrophages.
Methods
Rifampicin loaded Man-NLCs (RFP-Man-NLCs) and rifampicin loaded unmodified nanostructured lipid carriers (REP-NLCs) were prepared using thin film homogenization method and characterized by particle size, polydispersity index, zeta potential, transmission electron microscopy, encapsulation efficiency, pharmacokinetics, biodistribution, cell specific targeting, cytotoxicity and inflammatory response.
Results
RFP-Man-NLCs and REP-NLCs obtained displayed a size distribution around 160 nm (PDI <0.30) with positive charges of approximately 30 mV. The encapsulation efficiency of RFP was above 90%. In the biodistribution study, both RFP-Man-NLCs and RFP-NLCs, compared with the commercially available rifampicin solution, displayed superior lung-targeting ability. Compared to REP-NLCs, RFP-Man-NLCs exhibited significantly higher uptake efficiency in NR8383 cells and alveolar macrophages, which achieved cell-specific targeting. In addition, RFP-Man-NLCs were demonstrated to be a safe formulation with minimum toxicity and no inflammatory response.
Conclusions
RFP-Man-NLCs provided an alternative strategy for selectively delivering rifampicin to alveolar macrophages.
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Abbreviations
- AMs:
-
Alveolar macrophages
- AUC:
-
Area under the curve
- CLz:
-
Plasma clearance
- Cmax :
-
maximum concentration
- DAPI:
-
4′,6-diamidino-2-phenylindole
- DDAB:
-
Dimethyldioctadecylammonium bromide
- DMSO:
-
Dimethyl sulfoxide
- EPC:
-
Purified ovolecithin
- FITC-DHPE:
-
Fluorescein isothiocyanate labeled DHPE
- MCT:
-
Medium chain triglyceride
- MRT:
-
Mean retention time
- MTT:
-
3-[4, 5-dimethylthiazol-2-yl]-2, 5-diphenyltetrazolium bromide
- OCT:
-
Octadecylamine
- PDI:
-
Polydispersity index
- REP-NLCs:
-
Rifampicin loaded nanostructured lipid carriers
- RFP:
-
Rifampicin
- RFP Solution:
-
Rifampicin commercial solution
- RFP-Man-NLCs:
-
Cationic mannosylated rifampicin nanostructured lipid carriers
- t1/2z :
-
Half-life
- TEM:
-
Transmission electron microscopy
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ACKNOWLEDGMENTS AND DISCLOSURES
This work was funded by the National S&T Major Project of China (Grant No. 2012ZX09304004001) and the National Basic Research Program of China (No. 2013CB932504). The authors report no conflicts of interest.
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Song, X., Lin, Q., Guo, L. et al. Rifampicin Loaded Mannosylated Cationic Nanostructured Lipid Carriers for Alveolar Macrophage-specific Delivery. Pharm Res 32, 1741–1751 (2015). https://doi.org/10.1007/s11095-014-1572-3
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DOI: https://doi.org/10.1007/s11095-014-1572-3