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논문 기본 정보

자료유형
학술저널
저자정보
Yu-Tung Hsu (National Taiwan University of Science and Technology Taiwan) Chen-Yu Kao (National Taiwan University of Science and Technology Taiwan) Ming-Hua Ho (National Taiwan University of Science and Technology Taiwan) Shiao-Pieng Lee (Tri-Service General Hospital Taiwan)
저널정보
한국생체재료학회 생체재료학회지 생체재료학회지 제25권 제4호
발행연도
2021.12
수록면
465 - 476 (12page)
DOI
https://doi.org/10.1186/s40824-021-00234-6

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Background: Gastroretentive drug delivery system (GDDS) are novel systems that have been recently developed for treating stomach diseases. The key function of all GDDS systems is to control the retention time in the stomach. However, research into the bulk density or entanglement of polymers, especially regarding their effects on drug float and release times, is scarce. Methods: In this research, we prepared the floating core-shell beads carrying tetracycline. The ratio of chitosan and xanthan gum in the shell layer was changed to modify polymer compactness. Tetracycline was encapsulated in the alginate core. Results: Using scanning electron microscopy (SEM) techniques, we observed that the shell formulation did not change the bead morphology. The cross-sectional images showed that the beads were highly porous. The interaction between anionic xanthan gum and cationic chitosan made the shell layer dense, resisting to the mass transfer in the shell layer. Due to the high mass transfer resistance to water penetration, the longer float and delivery time were caused by the dense surface of the beads. The cell culture demonstrated that floating core-shell beads were biocompatible. Importantly, the beads with tetracycline showed a significant prolonged anti-bacterial effect. Conclusion: Research results proved that the floating and releasing progress of core-shell beads can be well controlled by adjusting the shell layer formulation that could promote the function of gastroretentive drugs.

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