Light-Triggered Clustered Vesicles with Self-Supplied Oxygen and Tissue Penetrability for Photodynamic Therapy against Hypoxic Tumor
作者:Junjie Li、Kai Wei、Shuai Zuo、Yixuan Xu、Zengshi Zha、Wendong Ke、Huabing Chen、Zhishen Ge
DOI:10.1002/adfm.201702108
日期:2017.9
Smart nanocarriers are of particular interest for highly effective photodynamic therapy (PDT) in the field of precision nanomedicine. Nevertheless, a critical challenge still remains in the exploration of potent PDT treatment against hypoxic tumor. Herein, light‐triggered clustered polymeric vesicles for photoinduced hypoxic tumor ablation are demonstrated, which are able to deeply penetrate into the
智能纳米载体对于精密纳米医学领域中的高效光动力疗法(PDT)尤为重要。然而,在探索针对缺氧肿瘤的有效PDT治疗方面仍然存在着严峻的挑战。在本文中,展示了用于光诱导的缺氧肿瘤消融的光触发簇状聚合物囊泡,它们能够深入地渗透到肿瘤中,并在光照射时同时提供氧气。过氧化氢(H 2 O 2)和聚(酰胺基胺)树枝状大分子结合二氢卟酚e6 /环戊二酸酯(CC-PAMAM)与反应性氧物种反应性三嵌段共聚物共组装到聚合物囊泡中。在805 nm照射下,囊泡表现出光触发的热效应,能够分解H将2 O 2转换为O 2,可明显确保减轻肿瘤处的缺氧。在660 nm辐照之后,在光辐照下,通过单线态氧介导的共聚物裂解,囊泡迅速失稳,从而使光敏CC-PAMAM从囊泡腔中释放出来,然后在渗透性差的肿瘤中深度渗透。因此,具有自供氧和深层组织穿透性的光触发囊泡通过光动力损伤实现了对缺氧性低渗透性胰腺肿瘤的完全消融。这些发现代表了针对
Constructing a four-input molecular keypad lock with a multi-stimuli-responsive phthalocyanine
作者:Summer Y. Y. Ha、Dennis K. P. Ng
DOI:10.1039/d0cc06251k
日期:——
It is responsive towards four stimuli, including glutathione (GSH), acid and light sources at a wavelength of >610 nm and 345 nm in a sequence-dependent manner, enabling it to function as a molecularkeypadlock with the four inputs. This work represents a proof-of-concept study using specially designed molecules to perform complicated sequential logic operations.