Oxaliplatin–Biomimetic Magnetic Nanoparticle Assemblies for Colon Cancer-Targeted Chemotherapy: An In Vitro Study Jabalera Ruz, Ylenia María García Pinel, Beatriz Ortiz, Raúl Iglesias Salto, Guillermo Ramón Cabeza, Laura Prados Salazar, José Carlos Jiménez López, Concepción Melguizo Alonso, Consolación Colon carcinoma Magnetite nanoparticles Magnetotactic bacteria Oxaliplatin Nanocarriers Conventional chemotherapy against colorectal cancer (CRC), the third most common cancer in the world, includes oxaliplatin (Oxa) which induces serious unwanted side effects that limit the efficiency of treatment. Therefore, alternative therapeutic approaches are urgently required. In this work, biomimetic magnetic nanoparticles (BMNPs) mediated by MamC were coupled to Oxa to evaluate the potential of the Oxa–BMNP nanoassembly for directed local delivery of the drug as a proof of concept for the future development of targeted chemotherapy against CRC. Electrostatic interactions between Oxa and BMNPs trigger the formation of the nanoassembly and keep it stable at physiological pH. When the BMNPs become neutral at acidic pH values, the Oxa is released, and such a release is greatly potentiated by hyperthermia. The coupling of the drug with the BMNPs improves its toxicity to even higher levels than the soluble drug, probably because of the fast internalization of the nanoassembly by tumor cells through endocytosis. In addition, the BMNPs are cytocompatible and non-hemolytic, providing positive feedback as a proof of concept for the nanoassembly. Our study clearly demonstrates the applicability of Oxa–BMNP in colon cancer and offers a promising nanoassembly for targeted chemotherapy against this type of tumor. 2020-04-22T11:44:01Z 2020-04-22T11:44:01Z 2019-08-06 info:eu-repo/semantics/article Jabalera, Y., Garcia-Pinel, B., Ortiz, R., Iglesias, G., Cabeza, L., Prados, J., ... & Melguizo, C. (2019). Oxaliplatin–Biomimetic Magnetic Nanoparticle Assemblies for Colon Cancer-Targeted Chemotherapy: An In Vitro Study. Pharmaceutics, 11(8), 395. http://hdl.handle.net/10481/61478 10.3390/pharmaceutics11080395 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España MDPI