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Synthesis and characterization of novel P(HEMA-LA-MADQUAT) micelles for co-delivery of methotrexate and Chrysin in combination cancer chemotherapy.

A Novel poly [2-hydroxyethyl methacrylate-Lactide-dimethylaminoethyl methacrylate quaternary ammonium alkyl halide] [P(HEMA-LA-MADQUAT)] copolymer was synthesized through combination of ring opening polymerization (ROP) and 'free' radical initiated polymerization methods. This newly developed copolymer was fully characterized by FT-IR, 1 HNMR and 13 CNMR spectroscopy. Micellization of the copolymer was performed by dialysis membrane method and obtained micelles were characterized by FESEM, dynamic light scattering (DLS), zeta potential (ξ), and critical micelle concentration (CMC) measurements. This copolymer was developed with the aim of co-delivering two different anticancer drugs: methotrexate (MTX) and chrysin. In vitro cytotoxicity effect of MTX@Chrysin-loaded P(HEMA-LA-MADQUAT) was also studied through assessing the survival rate of breast cancer cell line (MCF-7) and DAPI staining assays. Cationic micelle (and surface charge of + 7.6) with spherical morphology and an average diameter of 55 nm and CMC of 0.023 gL-1 was successfully obtained. Micelles showed the drug loaded capacity around 87.6 and 86.5% for MTX and Chrysin, respectively. The cytotoxicity assay of a drug-free nanocarrier on MCF-7 cell lines indicated that this developed micelles were suitable nanocarriers for anticancer drugs. Furthermore, the MTX@Chrysin-loaded micelle had more efficient anticancer performance than free dual anticancer drugs (MTX @ chrysin), confirmed by MTT assay and DAPI stainingmethods. Therefore, we envision that this recently developed novel micelle can enhance the efficacy of chemotherapeutic agents, MTX and Chrysin, combination chemotherapy and has the potential to be used as an anticancer drug delivery system for in vivo studies. Therefore, this recently developed novel micelle can enhance the efficacy of chemotherapeutic agents, MTX and Chrysin, combination chemotherapy and has the potential to be used as an anticancer drug delivery system for in vivo studies.

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