Smart Bone Graft Composite for Cancer Therapy Using Magnetic Hyperthermia

Area of Science:

• Biomaterials Science
• Nanotechnology
• Oncology

Background:

• Magnetic hyperthermia (MHT) utilizes heat from magnetic materials for cancer treatment, with magnetite nanoparticles commonly used.
• Magnetite's high Curie temperature (Tc) can cause undesirable local superheating.
• Strontium-doped lanthanum manganite (LSM) offers a suitable Tc range (42-45 °C) for MHT.

Purpose of the Study:

• To develop and characterize novel F18 bioactive glass/LSM composites for MHT cancer therapy.
• To evaluate the effect of varying LSM content (5-30 wt.%) on material properties.
• To assess sinterability, magnetic properties, heating ability, and in vitro bioactivity.

Main Methods:

• Fabrication of F18 bioactive glass composites with varying LSM concentrations.
• Analysis of sinterability, magnetic properties (Ms, Mr), and Curie temperature (Tc).
• Calorimetry measurements for heating ability under magnetic field and in vitro bioactivity assays (HCA formation).

Main Results:

• Increased LSM content enhanced saturation magnetization (Ms) and remanent magnetization (Mr).
• Confinement of LSM within the bioactive glass matrix increased Tc.
• Composites exhibited temperature increases up to 15 °C (LSM30) and demonstrated HCA formation within 15 days, with the best material reaching 40 °C.

Conclusions:

• The developed F18 bioactive glass/LSM composites show tunable magnetic properties and good in vitro bioactivity.
• These materials demonstrate proof-of-concept for MHT bone cancer therapy.
• Further research is warranted to explore their therapeutic potential.