A tumor-targeted Ganetespib-zinc phthalocyanine conjugate for synergistic chemo-photodynamic therapy
作者:Liangfeng Huang、Gaofei Wei、Xiaoqi Sun、Yali Jiang、Zeqian Huang、Yanjuan Huang、Yifeng Shen、Xiaoyu Xu、Yunhui Liao、Chunshun Zhao
DOI:10.1016/j.ejmech.2018.03.077
日期:2018.5
Therapeutic effects of photodynamic therapy (PDT) are limited by the selectivity of photosensitizer (PS). Herein, a novel tumor-targeted drug-PS conjugate (Gan-ZnPc) which integrated with zinc phthalocyanine (ZnPc) and Ganetespib has been developed. ZnPc is a promising PS with remarkable photosensitization ability. Ganetespib is a heat shock protein 90 (Hsp90) inhibitor with preferential tumor selectivity and conjugated to ZnPc as a tumor-targeted ligand. The multifunctional small molecule conjugate, Gan-ZnPc, could be bound to extracellular Hsp90 and then selectively internalized into the tumor cells, followed by the generation of abundant intracellular reactive oxygen species (ROS) upon irradiation. Besides, Gan-ZnPc can arrest cell proliferation and induce apoptosis by the inhibition of Hsp90. Herein, with combination of the inhibition of Hsp90 and the generation of cytotoxic ROS, Gan-ZnPc implements tumor selectivity, concentrated PDT and chemotherapy in a synergistic manner, which results in highly effective anti-tumor activity in vitro and in vivo. (C) 2018 Elsevier Masson SAS. All rights reserved.