Enhanced Cytotoxicity against a Pancreatic Cancer Cell Line Combining Radiation and Gold Nanoparticles

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Pancreatic cancer remains a significant health challenge with limited treatment options.
• Radiation therapy (RT) is a cornerstone of cancer treatment, but its efficacy can be limited.
• Gold nanoparticles (AuNPs) offer potential as radiosensitizers to enhance RT outcomes.

Purpose of the Study:

• To investigate the in vitro efficacy of two types of functionalized gold nanoparticles (AuNPs) as radiosensitizers in human pancreatic adenocarcinoma cells.
• To evaluate the combined effect of AuNPs and X-ray radiation on cancer cell viability.

Main Methods:

• Synthesis and characterization of hyaluronic acid/oleic acid-coated AuNPs (HAOA-AuNPs) and bombesin peptide-coated AuNPs (BBN-AuNPs) using Atomic Force Microscopy and Dynamic Light Scattering.
• Treatment of BxPC-3 pancreatic cancer cells with X-ray radiation, AuNPs alone, or a combination of RT and AuNPs.
• Assessment of cell viability using standard assays at various time points post-treatment.

Main Results:

• Both HAOA-AuNPs and BBN-AuNPs demonstrated dose-dependent cytotoxicity on their own.
• Radiation therapy alone reduced cell viability by up to 33%.
• The combination of RT with HAOA-AuNPs (400 μM) or BBN-AuNPs (50 μM) resulted in a significant further decrease in cell viability (26% and 22%, respectively) compared to RT alone.

Conclusions:

• Functionalized gold nanoparticles show promise as radiosensitizers for pancreatic cancer.
• Combining AuNPs with RT significantly enhances the reduction in cancer cell viability.
• These findings support further investigation of AuNPs as an adjuvant therapy in radiation oncology.