Photoactivatable Organic Semiconducting Pro-nanoenzymes

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Cancer Therapy

Background:

• Therapeutic enzymes offer potential for cancer treatment but lack in vivo specificity.
• Remote control of enzymatic activity for targeted cancer therapy remains a significant challenge.

Purpose of the Study:

• To develop a photoactivatable organic semiconducting pro-nanoenzyme (OSPE) for targeted cancer therapy.
• To investigate OSPE's ability to inhibit tumor growth and metastasis through a synergistic therapeutic approach.

Main Methods:

• Development of an organic semiconducting pro-nanoenzyme (OSPE) with photoactivatable properties.
• Utilizing near-infrared (NIR) light to activate OSPE for generating singlet oxygen (PDT) and degrading RNA.
• Evaluating OSPE's efficacy in a mouse xenograft model for tumor growth and metastasis inhibition.

Main Results:

• OSPE generates cytotoxic singlet oxygen (¹O₂) upon NIR irradiation for photodynamic therapy (PDT).
• OSPE triggers RNA degradation in the tumor microenvironment, downregulating metastasis-related proteins.
• OSPE demonstrated complete inhibition of tumor growth and lung metastasis in vivo, outperforming traditional PDT agents.

Conclusions:

• The developed OSPE offers a photoactivated, cancer-specific synergistic therapy.
• This approach shows potential for complete remission in cancer therapy by inhibiting both primary tumor growth and metastasis.
• OSPE represents a promising phototherapeutic-proenzyme strategy for advanced cancer treatment.