title: Intravenous magnetic nanoparticle cancer hyperthermia.
abstract: Magnetic nanoparticles heated by an alternating magnetic field could be used to treat cancers, either alone or in combination with radiotherapy or chemotherapy. However, direct intratumoral injections suffer from tumor incongruence and invasiveness, typically leaving undertreated regions, which lead to cancer regrowth. Intravenous injection more faithfully loads tumors, but, so far, it has been difficult achieving the necessary concentration in tumors before systemic toxicity occurs. Here, we describe use of a magnetic nanoparticle that, with a well-tolerated intravenous dose, achieved a tumor concentration of 1.9 mg Fe/g tumor in a subcutaneous squamous cell carcinoma mouse model, with a tumor to non-tumor ratio > 16. With an applied field of 38 kA/m at 980 kHz, tumors could be heated to 60°C in 2 minutes, durably ablating them with millimeter (mm) precision, leaving surrounding tissue intact.
authors.affiliation: Nanoprobes, Yaphank, NY, USA.
authors.forename: Hui S
authors.initials: HS
authors.lastname: Huang
authors.forename: James F
authors.initials: JF
authors.lastname: Hainfeld
mesh_terms: D061605:Administration, Intravenous; D000818:Animals; D045744:Cell Line, Tumor; D004354:Drug Screening Assays, Antitumor; D005260:Female; D006979:Hyperthermia, Induced / Q000379:methods*; D007501:Iron / Q000493:pharmacokinetics; D058185:Magnetite Nanoparticles / Q000008:administration & dosage / Q000737:chemistry / Q000627:therapeutic use*; D051379:Mice; D009369:Neoplasms / Q000628:therapy*; D013817:Thermography; D014018:Tissue Distribution
chemical_list: D058185:Magnetite Nanoparticles; D007501:Iron
keywords: alternating magnetic field; cancer; hyperthermia; intravenous delivery; magnetic nanoparticles
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