Inhalable microspheres embedding chitosan-coated PLGA nanoparticles for 2-methoxyestradiol.

Abstract:

:Developing a highly effective and lung-targeted local drug delivery carrier with low irritancy may be critical for improving treatment of lung cancer. Using soluble excipients as microspheres (MS) matrix, respirable MS embedding chitosan-coated poly(d,l-lactide-co-glycolide) nanoparticles (CNP-MS) for 2-methoxyestradiol (2-ME) were designed, which could avoid macrophage phagocytosis to achieve the targeted delivery of these drugs. 2-ME CNP-MS were prepared by spray-drying and characterized by morphology, redispersability, fine particle fraction (FPF) and drug release. Cytotoxicity, and lung deposition and histological examination were investigated. Results showed that 2-ME CNP-MS were spherical with a rough surfaces, exhibiting good redispersability, a high respirable fraction and sustained release characteristics. CNP-MS markedly enhanced the cytotoxicity of 2-ME by approximately 8.8-fold and 3.65-fold on SPC-A1 cells compared to solution and NP, respectively. After pulmonary administration, 2-ME CNP were distributed in rat lungs and for 10 mg of 2-ME CNP-MS, haematoxylin and eosin staining showed no obvious difference compared to the untreated control group. Therefore, CNP-MS revealed suitable features for local lung delivery and significantly enhanced cytotoxicity of 2-ME without obvious inflammation in lungs of rats, suggesting that 2-ME CNP-MS have great potential as an inhalation agent for targeted, highly effective and safe treatment of lung cancer.

journal_name

J Drug Target

authors

Guo X,Zhang X,Ye L,Zhang Y,Ding R,Hao Y,Zhao Y,Zhang Z,Zhang Y

doi

10.3109/1061186X.2013.878944

subject

Has Abstract

pub_date

2014-06-01 00:00:00

pages

421-7

issue

5

eissn

1061-186X

issn

1029-2330

journal_volume

22

pub_type

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