Exploiting Unique Alignment of Cobalt Ferrite Nanoparticles, Mild Hyperthermia, and Controlled Intrinsic Cobalt Toxicity for Cancer Therapy

Preethi Bala Balakrishnan, Niccolò Silvestri, Tamara Fernandez‐Cabada, Federica Marinaro, Soraia Fernandes, Sergio Fiorito, Mario Miscuglio, David Serantes, Sergiu Ruta, Karen Livesey, Ondrej Hovorka, Roy William Chantrell, Teresa Pellegrino

Research output: Contribution to journalArticlepeer-review

Abstract

Nanoparticle‐based magnetic hyperthermia is a well‐known thermal therapy platform studied to treat solid tumors, but its use for monotherapy is limited due to incomplete tumor eradication at hyperthermia temperature (45 °C). It is often combined with chemotherapy for obtaining a more effective therapeutic outcome. Cubic‐shaped cobalt ferrite nanoparticles (Co–Fe NCs) serve as magnetic hyperthermia agents and as a cytotoxic agent due to the known cobalt ion toxicity, allowing the achievement of both heat and cytotoxic effects from a single platform. In addition to this advantage, Co–Fe NCs have the unique ability to form growing chains under an alternating magnetic field (AMF). This unique chain formation, along with the mild hyperthermia and intrinsic cobalt toxicity, leads to complete tumor regression and improved overall survival in an in vivo murine xenograft model, all under clinically approved AMF conditions. Numerical calculations identify magnetic anisotropy as the main Co–Fe NCs’ feature to generate such chain formations. This novel combination therapy can improve the effects of magnetic hyperthermia, inaugurating investigation of mechanical behaviors of nanoparticles under AMF, as a new avenue for cancer therapy.
Original languageEnglish
Article number2003712
Number of pages11
JournalAdvanced Materials
Volume32
Issue number45
Early online date1 Oct 2020
DOIs
Publication statusPublished - 10 Oct 2020

Bibliographical note

© 2020 The Authors. Published by Wiley-VCH GmbH.

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