Abstract
The objective of this study was to investigate the influence of differently charged biocompatible polymers, including chitosan (CS), hyaluronic acid (HA), and hydroxypropyl cellulose (HPC), on the disposition and retention of 20(R)-ginsenoside-rg3 (Rg3)-loaded swellable microparticles in the lung. A high-pressure homogenization method combined with spray drying was used to prepare Rg3-loaded microparticles. In vitro aerodynamic performance of different microparticles was characterized by the Next Generation Impactor (NGI). Retention of the swellable microparticles in the rat lung was investigated using bronchoalveolar lavage fluid method. Influence of drug loading, polymer molecular weight, and polymer charge on the properties of the swellable microparticles was investigated. It was found that drug loading had no significant influence on experimental mass median aerodynamic diameter (MMADe) and fine particle fraction (FPF). Increasing polymer molecular weight caused no remarkable change in MMADe value, but the FPF value decreased with the increase of polymer molecular weight. At the same molecular weight level, polymer structure and charge had no statistical influence on the in vitro aerodynamic properties of the microparticles and lung disposition, but it influenced the swelling and bioadhesion behavior and therefore lung retention profile. Desirable phagocytosis escapement and inhibition of A549 cell proliferation were achieved for the developed swellable microparticles. In conclusion, the lung retention of swellable microparticles can be adjusted by selecting polymeric carriers with different structure and charge.
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Funding
This project is financially supported by the Construction of Innovative Drug Incubation Platform of Liaoning Province (No. 8 (2013)) and Major Scientific and Technological Special Projects of National “Major New Drug Discovery” of China (No. 2017ZX09201-002).
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The experiments comply with the current laws of China. All institutional and national guidelines for the care and use of laboratory animals were followed.
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Wang, X., Zhang, X., Fan, L. et al. Influence of polymeric carrier on the disposition and retention of 20(R)-ginsenoside-rg3-loaded swellable microparticles in the lung. Drug Deliv. and Transl. Res. 8, 252–265 (2018). https://doi.org/10.1007/s13346-017-0456-6
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DOI: https://doi.org/10.1007/s13346-017-0456-6