Theranostic imaging and multimodal photodynamic therapy and immunotherapy using the mTOR signaling pathway

Area of Science:

• Oncology
• Nanomedicine
• Cancer Therapy

Background:

• Metastases are the primary cause of cancer mortality, often poorly treated by current therapies.
• Existing treatments struggle to effectively target and eliminate metastatic cancer sites.
• The mTOR signaling pathway is critical in tumor development and spread.

Purpose of the Study:

• To develop a theranostic nanomaterial for imaging and treating metastatic tumors.
• To investigate the nanomaterial's mechanism of action in reducing tumor burden and metastases.
• To evaluate the efficacy of the nanomaterial in preclinical cancer models.

Main Methods:

• Development of a theranostic nanomaterial incorporating a chromophore for imaging and a photosensitizer for therapy.
• Utilizing photodynamic therapy for local cellular damage induction.
• Employing immunotherapy via mTOR signaling pathway inhibition for systemic immune response.

Main Results:

• The nanomaterial demonstrated significant reduction in primary tumor volume.
• Complete eradication of tumor metastases was observed in preclinical models.
• Effective treatment was shown in both metastatic breast cancer and multi-drug resistant hepatocellular carcinoma models.

Conclusions:

• The developed theranostic nanomaterial shows significant promise for treating metastatic cancers.
• This approach combines local tumor destruction with systemic immune activation.
• The nanomaterial offers a potential new strategy against challenging metastatic and drug-resistant cancers.