Indocyanine Green-lactosome and Near-infrared Light-based Intraoperative Imaging and Photodynamic Therapy for Metastatic Bone Tumors

Abstract

The reduction of local recurrence of metastatic spinal tuomors after intratumoral excision improves the quality of life. We have developed a novel photodynamic therapy (PDT) comprising an indocyanine green (ICG)-labeld nanocarrier (ICG-lactosome) and near-infrared light for use as an intraoperative adjuvant therapy. ICG-lactosomes accumulated in bone metastases from breast cancer because of enhanced permeability and retention effect. The cytotoxic effects of this novel PDT on human breast cancer cells were confirmed. In conclusion, ICG-lactosomes enable selective tumor imaging and represent a potential new PDT photosensitizer for adjuvant therapy during surgery for bone metastases from human breast cancer.