PMID- 34967270 OWN - NLM STAT- MEDLINE DCOM- 20220223 LR - 20220223 IS - 1521-0464 (Electronic) IS - 1071-7544 (Print) IS - 1071-7544 (Linking) VI - 29 IP - 1 DP - 2022 Dec TI - A pH-responsive complex based on supramolecular organic framework for drug-resistant breast cancer therapy. PG - 128-137 LID - 10.1080/10717544.2021.2021325 [doi] AB - Chemotherapy is one of the main ways to treat breast cancer clinically. However, the multidrug resistance to anti-tumor drugs limits their clinical use. To overcome these drawbacks, development of drug delivery systems (DDSs) has attracted more and more attention in cancer therapy. At present, the preparation and purification process are complicated for many reported DDSs, while clinic calls for new DDSs that are more convenient for preparation. Here, a new pH-responsive supramolecular organic framework drug delivery complex loading doxorubicin (DOX) is fabricated. Anti-tumor activity of the system in vitro was investigated by cell cytotoxicity, uptake assay, and cell apoptosis analysis. The anti-tumor activity in vivo was investigated by inspecting nude mice body weight, tumor volume, and weight, also a preliminary mechanism probe was conducted by HE and TUNEL staining. The DOX@SOF displayed high stability, good biocompatibility, and pH regulated drug release. At acid condition, the hydrazone bonds would be broken, which result in the dissociation of SOF, and then the drugs would be released from the system. Furthermore, DOX@SOF enhanced cellular internalization. Both in vitro and in vivo experiments reflected that DOX@SOF could enhance the anti-tumor activity of DOX for the MCF-7/ADR tumor cells and tumors. This study provides a highly efficient strategy to prepare stimulus-responsive supramolecular drug delivery complex for treatment of drug-resistant cancer, the results presented inspiring scientific interests in exploring new drug delivery strategy and reversing multi-drug resistance for clinical chemotherapy. FAU - Zhang, Yun-Chang AU - Zhang YC AD - School of Pharmacy, Naval Medical University, Shanghai, China. FAU - Zeng, Pei-Yu AU - Zeng PY AD - School of Pharmacy, Naval Medical University, Shanghai, China. FAU - Ma, Zhi-Qiang AU - Ma ZQ AD - School of Pharmacy, Naval Medical University, Shanghai, China. FAU - Xu, Zi-Yue AU - Xu ZY AD - Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, China. FAU - Wang, Ze-Kun AU - Wang ZK AD - Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, China. FAU - Guo, Beibei AU - Guo B AD - School of Pharmacy, Naval Medical University, Shanghai, China. FAU - Yang, Feng AU - Yang F AD - School of Pharmacy, Naval Medical University, Shanghai, China. FAU - Li, Zhan-Ting AU - Li ZT AD - Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, China. LA - eng PT - Journal Article PL - England TA - Drug Deliv JT - Drug delivery JID - 9417471 RN - 0 (Drug Carriers) RN - 80168379AG (Doxorubicin) SB - IM MH - Animals MH - Apoptosis/drug effects MH - Breast Neoplasms MH - Cell Line, Tumor MH - Cell Survival/drug effects MH - Chemistry, Pharmaceutical MH - Doxorubicin/administration & dosage MH - Drug Carriers/*chemistry MH - Drug Liberation MH - Drug Resistance, Neoplasm MH - Female MH - Humans MH - Hydrogen-Ion Concentration MH - Mice MH - Mice, Inbred BALB C MH - Mice, Nude MH - Random Allocation MH - Surface Properties MH - Xenograft Model Antitumor Assays PMC - PMC8725931 OTO - NOTNLM OT - Supramolecular organic framework OT - breast cancer OT - doxorubicin OT - drug delivery system OT - drug resistance COIS- No potential conflict of interest was reported by the authors. EDAT- 2021/12/31 06:00 MHDA- 2022/02/24 06:00 PMCR- 2021/12/30 CRDT- 2021/12/30 08:39 PHST- 2021/12/30 08:39 [entrez] PHST- 2021/12/31 06:00 [pubmed] PHST- 2022/02/24 06:00 [medline] PHST- 2021/12/30 00:00 [pmc-release] AID - 2021325 [pii] AID - 10.1080/10717544.2021.2021325 [doi] PST - ppublish SO - Drug Deliv. 2022 Dec;29(1):128-137. doi: 10.1080/10717544.2021.2021325.