TME-triggered copper-coordinated engineered programmable nanogenerators for on-demand cascade-amplifying oxidative...

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Cancer Therapy

Background:

• Oxidative stress-based cancer therapy faces challenges from tumor microenvironment factors like low hydrogen peroxide and high glutathione.
• Copper-based nanomaterials show promise but require strategies to enhance efficiency in vivo.

Purpose of the Study:

• To design a programmable nanogenerator for enhanced oxidative stress-based cancer therapy.
• To address the limitations of hydrogen peroxide availability and glutathione interference in the tumor microenvironment.

Main Methods:

• Coordination-driven co-assembly of Evans Blue, copper ions, and 5-hydroxy-p-naphthoquinone to create spike-like nanogenerators.
• Utilizing the nanogenerator's morphology for tumor targeting and cellular internalization.
• Triggering drug release and cascade amplification of oxidative stress via acidic lysosomes and glutathione.

Main Results:

• The nanogenerator effectively targets tumors and enters cancer cells.
• Released components amplify hydrogen peroxide, generate hydroxyl radicals, and down-regulate glutathione.
• Inhibition of Pin 1 activity and amplified oxidative stress led to significant antitumor effects.

Conclusions:

• Spatiotemporally programmable cascade nanogenerators offer a novel strategy for oxidative stress-based cancer therapy.
• This approach effectively overcomes tumor microenvironment limitations.
• The nanogenerator design demonstrates potential for improved cancer treatment outcomes.