Development of pH/Glutathione-Responsive Theranostic Agents Activated by Glutathione S-Transferase π for Human Colon Cancer
作者:Ji Liu、Xin Liu、Jianqiang Qian、Chi Meng、Peng Zhu、Jiaying Hang、Yaling Wang、Biao Xiong、Xiaodong Qiu、Weizhong Zhu、Yumin Yang、Yanan Zhang、Yong Ling
DOI:10.1021/acs.jmedchem.0c00354
日期:2020.9.10
pH-responsive fluorescence, with a 2-exomethylenecyclohexanone moiety, which can be activated by the tumor-targeting glutathione (GSH)/glutathione S-transferase π (GSTπ). These agents showed pH- and GSH-dual-responsive fluorescence in tumor cells but not in normal cells. Importantly, HJTA selectively illuminated tumor tissue for up to 7 h and generated precise visualization of orthotopic colonic tumors through
通过将具有抗肿瘤活性和pH响应荧光的β-咔啉衍生物与2-exomethylcyclohexanone部分共价连接,可以设计和合成两种新型的治疗剂HJTA和HJTB,后者可以被靶向肿瘤的谷胱甘肽(GSH)激活/谷胱甘肽S-转移酶π(GSTπ)。这些试剂在肿瘤细胞中显示出pH和GSH双重响应荧光,而在正常细胞中则没有。重要的是,HJTA有选择地照亮肿瘤组织长达7小时,并通过术中小鼠的血液循环系统对原位结肠肿瘤进行了精确的可视化显示。此外,HJTA在小鼠中表现出有效和选择性的抗增殖活性和结肠肿瘤抑制作用。最后,HJTA通过调节凋亡和自噬蛋白的表达,诱导了巨大的癌细胞凋亡和自噬。因此,这种具有靶向癌症治疗活性的pH / GSH双反应荧光探针为精确诊断和肿瘤治疗提供了一种新颖的工具,从而扩大了多功能试剂作为治疗性精确药物的影响。