Abstract
Nanoparticles (NPs) containing the hydrophilic drug salidroside (Sal) and the hydrophobic drug tamoxifen (Tam) were prepared using a triblock copolymer poly(lactic-co-glycolic acid) (PLGA)–poly(ethylene glycol) (PEG)–PLGA to achieve synergism in the treatment of breast cancer. The double emulsion (w/o/w) method was used to prepare Sal–Tam NPs with an average particle size of 275.3 ± 44.0 nm, a polydispersity index of 0.302 ± 0.102, and a zeta potential of − 6.98 ± 2.99. The entrapment efficiency of the hydrophilic and hydrophobic components was 32.63% ± 0.73% and 49.18% ± 3.04%, respectively. On differential scanning calorimetry, the NPs showed the amorphous nature of both Sal and Tam. The sustained release of Sal and Tam from the NPs was significantly prolonged under physiological conditions (pH 7.4). The CCK-8 assay using the 4T1 cell line revealed a 1.7-fold decrease in the IC50 value for Sal–Tam NPs when compared with free Tam. The in vivo anti-tumor effect was assessed in BALB/c mice, and the results demonstrated that these NPs decreased the tumor volume compared with saline and showed high anti-tumor activity. A pharmacokinetic study showed significant enhancement of the bioavailability of Tam in Sal–Tam NPs compared with free Tam in suspension. The intracellular and mitochondrial anti-oxidative effect of Sal was thought to be attributed to the promising anti-tumor effect of drug co-delivery. This study confirmed that the use of Sal–Tam NPs may be a promising approach in breast cancer therapy.
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This work was supported by the grant from the National Natural Science Foundation of China (No. 81873191).
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All animal experiments were conducted with approval from Tianjin International Joint Academy of Biomedicine (Tianjin, China).
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Yu, X., Sun, L., Tan, L. et al. Preparation and Characterization of PLGA–PEG–PLGA Nanoparticles Containing Salidroside and Tamoxifen for Breast Cancer Therapy. AAPS PharmSciTech 21, 85 (2020). https://doi.org/10.1208/s12249-019-1523-8
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DOI: https://doi.org/10.1208/s12249-019-1523-8