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用于小生物活性分子控释的磁响应脂质体水凝胶膜——对释放动力学的深入研究

Magnetic-Responsive Liposomal Hydrogel Membranes for Controlled Release of Small Bioactive Molecules-An Insight into the Release Kinetics.

作者信息

Pereira Luís, Ferreira Frederico Castelo, Pires Filipa, Portugal Carla A M

机构信息

LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology (FCT NOVA), Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.

Department of Bioengineering and iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.

出版信息

Membranes (Basel). 2023 Jul 17;13(7):674. doi: 10.3390/membranes13070674.

Abstract

This work explores the unique features of magnetic-responsive hydrogels to obtain liposomal hydrogel delivery platforms capable of precise magnetically modulated drug release based on the mechanical responses of these hydrogels when exposed to an external magnetic field. Magnetic-responsive liposomal hydrogel delivery systems were prepared by encapsulation of 1,2-dipalmitoyl-sn-glycero-3-phosphocoline (DPPC) multilayered vesicles (MLVs) loaded with ferulic acid (FA), i.e., DPPC:FA liposomes, into gelatin hydrogel membranes containing dispersed iron oxide nanoparticles (MNPs), i.e., magnetic-responsive gelatin. The FA release mechanisms and kinetics from magnetic-responsive liposomal gelatin were studied and compared with those obtained with conventional drug delivery systems, e.g., free liposomal suspensions and hydrogel matrices, to access the effect of liposome entrapment and magnetic field on FA delivery. FA release from liposomal gelatin membranes was well described by the Korsmeyer-Peppas model, indicating that FA release occurred under a controlled diffusional regime, with or without magnetic stimulation. DPPC:FA liposomal gelatin systems provided smoother controlled FA release, relative to that obtained with the liposome suspensions and with the hydrogel platforms, suggesting the promising application of liposomal hydrogel systems in longer-term therapeutics. The magnetic field, with low intensity (0.08 T), was found to stimulate the FA release from magnetic-responsive liposomal gelatin systems, increasing the release rates while shifting the FA release to a quasi-Fickian mechanism. The magnetic-responsive liposomal hydrogels developed in this work offer the possibility to magnetically activate drug release from these liposomal platforms based on a non-thermal related delivery strategy, paving the way for the development of novel and more efficient applications of MLVs and liposomal delivery systems in biomedicine.

摘要

本研究探索了磁响应水凝胶的独特特性,以基于这些水凝胶在外部磁场作用下的力学响应,获得能够精确磁调制药物释放的脂质体水凝胶递送平台。通过将负载阿魏酸(FA)的1,2-二棕榈酰-sn-甘油-3-磷酸胆碱(DPPC)多层囊泡(MLV),即DPPC:FA脂质体,包裹到含有分散的氧化铁纳米颗粒(MNP)的明胶水凝胶膜中,即磁响应明胶,制备了磁响应脂质体水凝胶递送系统。研究了磁响应脂质体明胶中FA的释放机制和动力学,并与传统药物递送系统(如游离脂质体悬浮液和水凝胶基质)进行了比较,以探讨脂质体包封和磁场对FA递送的影响。Korsmeyer-Peppas模型很好地描述了FA从脂质体明胶膜中的释放,表明FA的释放在有或没有磁刺激的情况下均在可控扩散机制下发生。相对于脂质体悬浮液和水凝胶平台,DPPC:FA脂质体明胶系统提供了更平滑的FA控释,这表明脂质体水凝胶系统在长期治疗中有广阔的应用前景。发现低强度(0.08 T)磁场可刺激磁响应脂质体明胶系统中FA的释放,提高释放速率,同时将FA释放转变为准Fickian机制。本研究开发的磁响应脂质体水凝胶提供了基于非热相关递送策略从这些脂质体平台磁激活药物释放的可能性,为MLV和脂质体递送系统在生物医学中的新型高效应用开发铺平了道路。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/413f/10385637/e108553d8337/membranes-13-00674-g0A1.jpg

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