Nanoscintillator-Based X-Ray-Induced Photodynamic Therapy

Area of Science:

• Nanomedicine
• Biophysics
• Oncology

Background:

• Photodynamic therapy (PDT) offers a low-toxicity cancer treatment by generating reactive oxygen species (ROS) upon light activation of photosensitizers.
• Clinical application of PDT is limited by the poor tissue penetration of visible light.
• X-ray-induced photodynamic therapy (X-PDT) leverages the superior penetration of X-rays to overcome this limitation.

Purpose of the Study:

• To demonstrate the principle of X-PDT using a novel nanoscintillator system.
• To develop a dual-function nanoscintillator for guiding radiotherapy and inducing PDT.

Main Methods:

• Development of a LiGa5O8:Cr (LGO:Cr)-based nanoscintillator.
• Encapsulation of the photosensitizer 2,3-naphthalocyanine within a mesoporous silica shell of the nanoscintillator.
• Utilizing the near-infrared X-ray luminescence emitted by the nanoscintillator.

Main Results:

• The novel nanoscintillator successfully emits near-infrared X-ray luminescence.
• The nanoscintillator system is capable of inducing PDT.
• The system can potentially guide external beam therapy.

Conclusions:

• The developed nanoscintillator represents a promising platform for X-ray-induced photodynamic therapy.
• This approach overcomes the limitations of traditional PDT, enabling deeper tumor treatment.
• The dual functionality offers potential for integrated radiotherapy and PDT.