阿霉素
肿瘤微环境
三阴性乳腺癌
多重耐药
癌症研究
体内
药物输送
癌细胞
脂质体
抗药性
化疗
药理学
化学
癌症
乳腺癌
医学
生物
内科学
肿瘤细胞
生物化学
有机化学
生物技术
微生物学
作者
Okan Tezcan,Asmaa Said Elshafei,Karina Benderski,Elena Rama,Maike Wagner,Diana Moeckel,Robert Pola,Michal Pechar,Tomáš Etrych,Saskia von Stillfried,Fabian Kießling,Ralf Weiskirchen,Steffen K. Meurer,Twan Lammers
标识
DOI:10.1016/j.jconrel.2022.12.056
摘要
Multidrug resistance (MDR) reduces the efficacy of chemotherapy. Besides inducing the expression of drug efflux pumps, chemotherapy treatment alters the composition of the tumor microenvironment (TME), thereby potentially limiting tumor-directed drug delivery. To study the impact of MDR signaling in cancer cells on TME remodeling and nanomedicine delivery, we generated multidrug-resistant 4T1 triple-negative breast cancer (TNBC) cells by exposing sensitive 4T1 cells to gradually increasing doxorubicin concentrations. In 2D and 3D cell cultures, resistant 4T1 cells are presented with a more mesenchymal phenotype and produced increased amounts of collagen. While sensitive and resistant 4T1 cells showed similar tumor growth kinetics in vivo, the TME of resistant tumors was enriched in collagen and fibronectin. Vascular perfusion was also significantly increased. Fluorophore-labeled polymeric (∼10 nm) and liposomal (∼100 nm) drug carriers were administered to mice with resistant and sensitive tumors. Their tumor accumulation and penetration were studied using multimodal and multiscale optical imaging. At the whole tumor level, polymers accumulate more efficiently in resistant than in sensitive tumors. For liposomes, the trend was similar, but the differences in tumor accumulation were insignificant. At the individual blood vessel level, both polymers and liposomes were less able to extravasate out of the vasculature and penetrate the interstitium in resistant tumors. In a final in vivo efficacy study, we observed a stronger inhibitory effect of cellular and microenvironmental MDR on liposomal doxorubicin performance than free doxorubicin. These results exemplify that besides classical cellular MDR, microenvironmental drug resistance features should be considered when aiming to target and treat multidrug-resistant tumors more efficiently.
科研通智能强力驱动
Strongly Powered by AbleSci AI