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Solid Lipid Nanoparticles for Duodenum Targeted Oral Delivery of Tilmicosin.

Authors :
Zhou K
Yan Y
Chen D
Huang L
Li C
Meng K
Wang S
Algharib SA
Yuan Z
Xie S
Source :
Pharmaceutics [Pharmaceutics] 2020 Aug 04; Vol. 12 (8). Date of Electronic Publication: 2020 Aug 04.
Publication Year :
2020

Abstract

Developing a targeted oral delivery system to improve the efficacy of veterinary antibiotics and reduce their consumption and environmental risks is urgent. To achieve the duodenum-targeted release of tilmicosin, the enteric granule containing tilmicosin-loaded solid lipid nanoparticles (TIL-SLNs) was prepared based on its absorption site and transport characteristics. The in vitro release, release mechanisms, stability, palatability, and pharmacokinetics of the optimum enteric granules were studied. The intestine perfusion indicated that the main absorption site of tilmicosin was shifted to duodenum from ileum by TIL-SLNs, while, the absorption of TIL-SLNs in the duodenum was hindered by P-glycoprotein (P-gp). In contrast with TIL-SLNs, the TIL-SLNs could be more effectively delivered to the duodenum in intact form after enteric coating. Its effective permeability coefficient was enhanced when P-gp inhibitors were added. Compared to commercial premix, although the TIL-SLNs did not improve the oral absorption of tilmicosin, the time to reach peak concentration (T <subscript>max</subscript> ) was obviously shortened. After the enteric coating of the granules containing SLNs and P-gp inhibitor of polysorbate-80, the oral absorption of tilmicosin was improved 2.72 fold, and the T <subscript>max</subscript> was shortened by 2 h. The combination of duodenum-targeted release and P-gp inhibitors was an effective method to improve the oral absorption of tilmicosin.

Details

Language :
English
ISSN :
1999-4923
Volume :
12
Issue :
8
Database :
MEDLINE
Journal :
Pharmaceutics
Publication Type :
Academic Journal
Accession number :
32759764
Full Text :
https://doi.org/10.3390/pharmaceutics12080731