Abstract
Block copolymer comprising of hydrophilic poly[N-(2-hydroxypropyl)methacrylamide] (PHP) and reactive poly[N-(2-hydrazinyl-2-oxoethyl)methacrylamide] (PMAH) was synthesized by a reversible addition-fragmentation chain transfer (RAFT) polymerization and conjugated with doxorubicin (Dox) and/or RGDS targeting peptide via one-step reaction using N-γ-maleimidobutyryl-oxysuccinimide ester. The resulting copolymer served as a coating of magnetic γ-Fe2O3 nanoparticles that were tested in cell proliferation and in vivo experiments on a mice model with inoculated rat C6 glioblastoma tumor. The nanoparticles conjugated with RGDS peptide and doxorubicin easily engulfed both C6 tumor cell line, primary glioblastoma (GB) cells, and human mesenchymal stem cells (hMSC) used as a control; the particles decreased the GB cell growth by 45% compared to control cells without any treatment. Moreover, the γ-Fe2O3@P(HP-MAH)-RGDS-Dox nanoparticles injected into C6 glioblastoma cell-derived tumors grown in the posterior flank of mice decreased the tumor size and more apoptotic cells were spread compared to that treated with free Dox.
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Financial support of the Czech Science Foundation (No. 20-02177J) and the Operational Programme Research, Development and Education in the framework of the project Center of Reconstructive Neuroscience (No. CZ.02.1.01/0.0./0.0/15_003/0000419) is gratefully acknowledged.
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The guidelines and approval of the Institutional Review Board (IRB) with signed informed consent was obtained for tumor glioblastoma cell sample. All animal experiments were performed in accordance with the European Communities Council Directive of 22 September 2010 (2010/63/EU) regarding the use of animals in research and were approved by the Ethics Committee of the Institute of Experimental Medicine and Committee of the Czech Academy of Sciences under Project No 78/2020.
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Horák, D., Turnovcová, K., Plichta, Z. et al. RGDS- and doxorubicin-modified poly[N-(2-hydroxypropyl)methacrylamide]-coated γ-Fe2O3 nanoparticles for treatment of glioblastoma. Colloid Polym Sci 300, 267–277 (2022). https://doi.org/10.1007/s00396-021-04895-6
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DOI: https://doi.org/10.1007/s00396-021-04895-6