Could FA-PG-SPIONs act as a hyperthermia sensitizing agent? An in vitro study

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Superparamagnetic iron oxide nanoparticles (SPIONs) are utilized in hyperthermia cancer therapy.
• Targeted delivery of SPIONs can improve therapeutic efficacy.
• Polyglycerol coating enhances SPION biocompatibility and stability.

Purpose of the Study:

• To investigate the therapeutic effect of polyglycerol-coated SPIONs (PG-SPIONs) and folic acid-conjugated PG-SPIONs (FA-PG-SPIONs) with hyperthermia on HeLa cell viability.
• To compare the efficacy of targeted versus non-targeted nanoparticles in combination with hyperthermia.
• To evaluate the impact of nanoparticle concentration and heating time on the thermal enhancement factor (TEF).

Main Methods:

• Synthesis and characterization of PG-SPIONs and FA-PG-SPIONs.
• In vitro study on HeLa cells treated with nanoparticles and hyperthermia.
• Assessment of cell viability and penetration rates.
• Measurement of thermal enhancement factor (TEF).

Main Results:

• FA-PG-SPIONs demonstrated higher cell penetration rates compared to PG-SPIONs.
• Treatment with ≥ 50 µg/ml FA-PG-SPIONs and hyperthermia induced significant cytotoxicity in HeLa cells.
• Increasing FA-PG-SPION concentration and heating time elevated TEF, with maximum effect at 200 µg/ml and 60 min.
• PG-SPIONs did not show increased TEF with concentration or heating time.

Conclusions:

• FA-PG-SPIONs are effective hyperthermia sensitizing agents for cancer therapy.
• Concentrations of ≥ 100 µg/ml FA-PG-SPIONs combined with hyperthermia can enhance cancer treatment outcomes.
• Targeted delivery and hyperthermia synergistically improve therapeutic efficiency.