Laser ablation of pancreatic cancer using a cylindrical light diffuser

Area of Science:

• Oncology
• Biomedical Engineering
• Minimally Invasive Surgery

Background:

• Pancreatic cancer (PC) presents a significant global health challenge with increasing incidence and mortality.
• Existing treatments for PC have limitations, necessitating the exploration of novel therapeutic strategies.
• Laser ablation (LA) is an emerging technique for cancer treatment, showing potential for various tumor types.

Purpose of the Study:

• To evaluate the safety and feasibility of a novel cylindrical light diffuser for laser ablation in a pancreatic cancer xenograft model.
• To determine the correlation between laser energy dosage and tumor response in pancreatic cancer.
• To assess the efficacy of laser ablation in inducing tumor necrosis using a new device.

Main Methods:

• A xenograft model of pancreatic cancer was established using PANC-1 cells in BALB/c mice.
• A customized high-power laser system with a novel cylindrical light diffuser was employed for tumor irradiation.
• Tumors were treated at varying laser power (5W) and duration (40-200s), with subsequent histopathological analysis of induced necrosis.

Main Results:

• Laser ablation treatment with the cylindrical light diffuser resulted in significant tumor necrosis.
• A strong positive correlation (Pearson's r=0.78, p<0.01) was observed between laser ablation energy and the extent of tumor necrosis.
• The procedure was safe, with no acute bleeding or major complications reported, and demonstrated homogeneous tissue necrosis.

Conclusions:

• The novel cylindrical light diffuser facilitates safe and effective laser ablation for pancreatic cancer in a preclinical setting.
• Laser ablation dosage is a critical factor in achieving therapeutic tumor necrosis.
• This technology shows potential as a new, minimally invasive treatment option for pancreatic cancer.