Effect of Cellular and Microenvironmental Multidrug Resistance on Tumor-Targeted Drug Delivery in Triple-Negative Breast Cancer

Autor: Okan Tezcan, Asmaa Said Elshafei, Karina Benderski, Elena Rama, Maike Wagner, Diana Moeckel, Robert Pola, Michal Pechar, Tomas Etrych, Saskia von Stillfried, Fabian Kiessling, Ralf Weiskirchen, Steffen Meurer, Twan Lammers
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: J Control Release
Journal of Controlled Release
Popis: 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 4 T1 triple-negative breast cancer (TNBC) cells by exposing sensitive 4 T1 cells to gradually increasing doxorubicin concentrations. In 2D and 3D cell cultures, resistant 4 T1 cells presented with a more mesenchymal phenotype and produced increased amounts of collagen. While sensitive and resistant 4 T1 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.
Databáze: OpenAIRE
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