Porphysomes: Multimodal Nanoparticle for Primary Tumor Delineation and Lymphatic Metastasis Mapping in a...

Area of Science:

• Biomedical imaging
• Nanotechnology
• Oncology

Background:

• Accurate delineation of neoplastic tissues and metastatic lymph nodes is crucial for effective head and neck cancer treatment.
• Current imaging techniques may have limitations in precisely identifying tumor margins and metastatic spread.

Purpose of the Study:

• To evaluate the efficacy of copper-64 (⁶⁴Cu) porphysome nanoparticles for PET imaging in a head and neck cancer model.
• To assess the potential of these nanoparticles for intraoperative fluorescence-guided surgery.

Main Methods:

• Development and characterization of ⁶⁴Cu-porphysome nanoparticles.
• Administration of nanoparticles in an orthotopic rabbit model of head and neck cancer.
• PET imaging to assess tumor and lymph node delineation.
• Evaluation of fluorescence activation for surgical guidance.

Main Results:

• ⁶⁴Cu-porphysome nanoparticles provided superior delineation of neoplastic tissues and metastatic lymph nodes.
• Effective visualization of vascular drainage patterns was achieved.
• Selective fluorescence activation in tumor and metastatic sites was observed, enabling intraoperative guidance.

Conclusions:

• ⁶⁴Cu-porphysome nanoparticles are a promising tool for enhanced PET imaging of head and neck cancer.
• The fluorescence properties facilitate intraoperative guidance, potentially improving surgical outcomes.