Light-Directed Self-Powered Metal-Organic Framework Based Nanorobots for Deep Tumor Penetration

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Effective intratumoral distribution of anticancer agents is crucial for successful oncotherapy.
• Traditional passive drug delivery faces limitations in penetrating solid tumors.
• Developing advanced strategies for deep tumor penetration is a significant challenge.

Purpose of the Study:

• To develop a light-directed, self-powered nanorobot for enhanced drug delivery and tumor penetration.
• To utilize a zirconium-based porphyrin metal-organic framework (MOF) for smart delivery of therapeutics.
• To achieve deep tumor penetration and improved photochemotherapy efficacy.

Main Methods:

• Fabrication of a MOF-based nanorobot capable of generating hydrogen sulfide gas for propulsion.
• Demonstration of negative phototaxis in an acidic tumor microenvironment.
• Utilizing red light irradiation to guide nanorobots for deep tumor penetration.
• Incorporating tumor-responsive release and activation of delivered anticancer agents and photosensitizers.

Main Results:

• The nanorobot demonstrated effective propulsion and directed movement away from light sources in acidic conditions.
• Significant enhancement in tumor penetration depth was achieved compared to traditional methods.
• Tumor-responsive release of therapeutics led to improved activation within tumor tissues.
• Combined photo-chemotherapy using the nanorobot system showed significantly improved therapeutic efficacy.

Conclusions:

• The developed light-directed, self-powered MOF nanorobot offers a promising strategy for overcoming drug delivery challenges in solid tumors.
• This innovative approach significantly enhances intratumoral drug distribution and penetration, leading to improved oncotherapy outcomes.
• The nanorobot system holds potential for advancing targeted cancer treatment through smart drug delivery and enhanced photochemotherapy.