Cyclodextrin Dimers as Cleavable Carriers of Photodynamic Sensitizers
摘要:
Several phthalocyanines carrying hydrophobic components have been synthesized and shown to bind to a group of cyclodextrin dimers with a carbon-carbon double bond in the linker. The complexes are soluble in water. On irradiation in the presence of oxygen, the singlet oxygen produced cleaves the olefinic linkers in the complexes, resulting in precipitation of the sensitizers. This process concentrates the sensitizers in the light beam, a process that has useful potential in photodynamic therapy.
纳米载体已经成为增强化学疗法和光动力疗法(PDT)(Chem-PDT)联合治疗的重要策略。然而,常规的纳米载体遭受血液中药物泄漏和在靶位点药物释放不足的问题。本文中,我们设计了载有二氢卟酚e6(Ce6)的GEM前药聚合物胶束,该胶束具有单线态氧可裂解的连接子和pH响应开关,以避免药物在血液中泄漏。这些负载Ce6的前药胶束具有均匀的粒径分布,粒径为78 nm。同时,通过酸性pH和激光辐照可以很好地控制Ce6和GEM的释放。此外,这些胶束表现出极大的酸触发粒度收缩和电荷转换特性,促进胶束在肿瘤处的渗透和胶束的细胞摄取,体外细胞领域和流式细胞仪。而且,这些胶束的体外和体内1 O 2产生能力和抗肿瘤能力令人印象深刻。这种新型的纳米载体是高效Chem-PDT治疗的潜在候选者。
Self‐Amplified Photodynamic Therapy through the
<sup>1</sup>
O
<sub>2</sub>
‐Mediated Internalization of Photosensitizers from a Ppa‐Bearing Block Copolymer
are employed to deliver photosensitizers for photodynamictherapy (PDT) through the enhanced penetration and retention effect, but disadvantages including the premature leakage and non-selective release of photosensitizers still exist. Herein, we report a 1 O2 -responsive blockcopolymer (POEGMA-b-P(MAA-co-VSPpaMA) to enhance PDT via the controllable release of photosensitizers. Once nanoparticles formed
Visible light-induced singlet oxygen-mediated intracellular disassembly of polymeric micelles co-loaded with a photosensitizer and an anticancer drug for enhanced photodynamic therapy
作者:Gurusamy Saravanakumar、Junseok Lee、Jihoon Kim、Won Jong Kim
DOI:10.1039/c5cc01937k
日期:——
This communication demonstrates the enhanced photodynamic therapy by means of singlet oxygen sensitive micelle, photosensitizer and anticancer drug.