De Geest Bruno G, Stubbe Barbara G, Jonas Alain M, Van Thienen Tinneke, Hinrichs Wouter L J, Demeester Joseph, De Smedt Stefaan C
Laboratory of General Biochemistry and Physical Pharmacy, Department of Pharmaceutics, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium.
Biomacromolecules. 2006 Jan;7(1):373-9. doi: 10.1021/bm0507296.
Self-exploding microparticles show potential for advanced delivery of certain therapeutics. This study evaluates (1) whether degrading biodegradable dextran hydroxyethyl methacrylate (dex-HEMA) microgels can be coated by a lipid membrane and (2) whether the surrounding membrane can be ruptured by the increasing swelling pressure of the degrading microgel. We found that adsorption of charged liposomes to oppositely charged dex-HEMA microgels provides efficient coating of the microgels, whereby microparticles with a "core-shell" structure were clearly obtained. Especially, we could confirm experimentally that the swelling pressure increase of degrading dex-HEMA microgels can destroy the lipid membrane surrounding the microgels.
自爆炸微粒显示出在某些治疗药物高级递送方面的潜力。本研究评估:(1)可降解的生物可降解甲基丙烯酸羟乙酯葡聚糖(dex-HEMA)微凝胶是否能用脂质膜包被;(2)降解的微凝胶不断增加的溶胀压力是否能使周围的膜破裂。我们发现,带电荷的脂质体吸附到带相反电荷的dex-HEMA微凝胶上可有效地包被微凝胶,从而清晰地获得具有“核壳”结构的微粒。特别是,我们能够通过实验证实,降解的dex-HEMA微凝胶溶胀压力的增加可破坏微凝胶周围的脂质膜。
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