Abstract
The purpose of this study was to investigate the potential of Bletilla striata polysaccharide (BSP, a natural glucomannan material) for the development of a gastroretentive drug delivery system for the first time. Novel BSP-based porous wafer was prepared for levofloxacin hydrochloride (LFH) delivery by combining floating, swelling, and mucoadhesion mechanisms. The influences of BSP and ethyl cellulose (EC) on drug release and mucoadhesive strength were studied by 32 factorial design. The optimized matrix was coated with polycaprolactone (PCL) electrospun membrane by electrospinning and heat treatment technology. The optimized formula (F6, coated) exhibited Q4 h of 41.20 ± 1.90%, Q8 h of 76.49 ± 1.69%, and mucoadhesive strength of 86.11 ± 1.33 gf, and its drug release profile most closely resembled the Korsmeyer–Peppas model with anomalous diffusion driving mechanism. F6 (coated) also presented excellent buoyancy, preferred swelling characteristic due to the porous structure formed by freeze-drying. Meanwhile, the internal morphology, physical state, drug–excipient compatibility, and thermal behavior were recorded. The negligible cytotoxicity of F6 (coated) was observed in human gastric epithelial cell cultures. In the in vitro antimicrobial experiment, the prepared wafer exhibited obvious bacterial inhibition zone, and due to its longer gastric retention, the wafer also performed a more effective Helicobacter pylori clearance than free LFH in vivo.
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Abbreviations
- BSP:
-
Bletilla striata polysaccharide
- DSC:
-
Differential scanning calorimeter
- EC:
-
Ethyl cellulose
- FTIR:
-
Fourier transform infrared spectroscopy
- GES-1:
-
Human gastric mucosal epithelial cells
- GRDDS:
-
Gastroretentive drug delivery system
- H. pylori :
-
Helicobacter pylori
- LFH:
-
Levofloxacin hydrochloride
- PCL:
-
Polycaprolactone
- Q 4 h :
-
Cumulative release of the drug at 4 h
- Q 8 h :
-
Cumulative release of the drug at 8 h
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Funding
This research was supported by the National Natural Science Foundation of China (81603309), the National Key Research and Development Program of China (2017YFC1700705), the Sichuan Provincial Scholars for Science and Technology Activities for Overseas Researchers (2018-68), and the Key Projects of Central Universities (2018NZD18).
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All the animal experiments were approved and supervised/conducted by the Chengdu University of Traditional Chinese Medicine Ethics Committee of Care and Use of Laboratory Animals, and the animals were house and handled according to the University Unit for Laboratory Animal Medicine guidelines.
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Li, Z., Zeng, R., Yang, L. et al. Development and Characterization of PCL Electrospun Membrane-Coated Bletilla striata Polysaccharide-Based Gastroretentive Drug Delivery System. AAPS PharmSciTech 21, 66 (2020). https://doi.org/10.1208/s12249-019-1607-5
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DOI: https://doi.org/10.1208/s12249-019-1607-5