Ultrasmall Cu₂O@His Nanozymes with RONS Scavenging Capability for Anti-inflammatory Therapy

Area of Science:

• Biomedical Engineering
• Materials Science
• Nanotechnology

Background:

• Inflammatory sites are characterized by high concentrations of reactive oxygen and nitrogen species (RONS).
• Scavenging RONS at the inflammation site is a promising therapeutic strategy.
• Developing effective RONS scavengers is crucial for treating inflammatory diseases like inflammatory bowel disease (IBD).

Purpose of the Study:

• To introduce ultrasmall copper oxide nanoparticles (Cu2O@His) as a novel therapeutic agent for inflammatory bowel disease (IBD).
• To evaluate the RONS-scavenging ability and therapeutic efficacy of Cu2O@His in a mouse model of IBD.
• To investigate the mechanism of action, including mitochondrial targeting and repair.

Main Methods:

• Synthesis of ultrasmall Cu2O@His nanoparticles.
• Characterization of nanoparticle properties, including size, dispersion, and stability.
• In vivo evaluation of Cu2O@His efficacy in a mouse model of IBD, assessing RONS scavenging and mitochondrial function.

Main Results:

• Cu2O@His nanoparticles exhibited enhanced dispersion and stability due to copper-histidine coordination.
• The ultrasmall size and large surface area of Cu2O@His resulted in outstanding RONS-clearing ability.
• Cu2O@His effectively targeted mitochondria, repaired damaged mitochondria, and demonstrated significant efficacy in treating mouse IBD.

Conclusions:

• Ultrasmall Cu2O@His nanoparticles are effective RONS scavengers with therapeutic potential for IBD.
• The nanoparticles' ability to target and repair mitochondria contributes to their efficacy.
• This study presents a new approach for developing multifunctional nanozymes for inflammatory disease treatment.