Division of Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457, Singapore.
Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada N2L 3G1.
Colloids Surf B Biointerfaces. 2015 Feb 1;126:569-74. doi: 10.1016/j.colsurfb.2014.11.019. Epub 2014 Nov 22.
Drug-carriers, capable of releasing the drug at the target sites upon external stimuli, are attractive for theranostic applications. In recent years, photo-responsive nanoparticles (NPs) have received considerable attention because of their potentials in providing spatial, temporal, and dosage control over the drug release. However, most of the relevant technologies are still in the process of development and are unprocurable by the clinics. Here, we demonstrated facile fabrication of these photo-responsive NPs by loading hydrophilic gold NPs within thermo-responsive liposomes. Calcein was used as a model drug to evaluate the encapsulation efficiency and the release kinetic profile upon heat/light stimulation. Furthermore, we characterized their size, morphology, phase transition temperature and stability. Finally, we demonstrated that this photo-triggered release might be due to the membrane disruption caused by microbubble cavitation.
载药体系能够在外部刺激下将药物靶向释放,非常适合用于诊断与治疗一体化应用。近年来,光响应纳米颗粒(NPs)由于在药物释放的时空和剂量控制方面具有潜力而受到广泛关注。然而,大多数相关技术仍处于开发阶段,临床无法获得。在这里,我们通过将亲水性金纳米颗粒负载在温敏脂质体中,展示了这些光响应 NPs 的简易制备方法。以 calcein 为模型药物,评估了其在热/光刺激下的包封效率和释放动力学。此外,我们还对它们的粒径、形态、相转变温度和稳定性进行了表征。最后,我们证明这种光触发释放可能是由于微泡空化引起的膜破裂所致。
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