Gold nanotriangles: scale up and X-ray radiosensitization effects in mice

Area of Science:

• Nanomedicine
• Radiotherapy
• Biophysics

Background:

• Gold nanoparticles are investigated for cancer radiosensitization due to selective accumulation in tumors.
• Optimal nanoparticle characteristics for radiosensitization are not fully understood.
• Gold nanotriangles (AuNTs) are proposed as novel radiosensitizers.

Purpose of the Study:

• To develop a scalable synthesis for high-quality gold nanotriangles (AuNTs).
• To evaluate PEGylated AuNTs (pAuNTs) for cellular uptake, cytotoxicity, biodistribution, and radiosensitization in glioblastoma.
• To assess the potential of AuNTs in enhancing X-ray radiotherapy.

Main Methods:

• Developed a large-scale synthesis for monodisperse AuNTs.
• Conducted in vitro and in vivo studies on PEGylated AuNTs (pAuNTs).
• Assessed cellular uptake, cytotoxicity, biodistribution, and radiosensitization effects on human Glioblastoma Multiforme (GBM) cells.

Main Results:

• Successfully scaled synthesis of high-quality AuNTs and pAuNTs.
• pAuNTs exhibited nonspecific cellular uptake with no significant cytotoxicity.
• Demonstrated excellent radiosensitization effects in radiation-resistant GBM cells.

Conclusions:

• A scalable synthesis for AuNTs and pAuNTs was established.
• pAuNTs are effective radiosensitizers for glioblastoma, showing good uptake and low toxicity.
• AuNTs represent a promising strategy for enhancing X-ray radiotherapy outcomes.