Selenium-Based Nanozyme as Biomimetic Antioxidant Machinery.

Area of Science:

• Biomaterials Science
• Nanotechnology
• Biomedical Engineering
• Materials Chemistry

Background:

• Intracellular antioxidant defense relies on both enzymatic and non-enzymatic biomolecules.
• Oxidative damage contributes to various pathologies, necessitating novel therapeutic strategies.
• Mimicking natural antioxidant systems with synthetic materials offers a promising approach.

Purpose of the Study:

• To design and synthesize a self-assembly nanocomposite mimicking endogenous antioxidant machinery.
• To evaluate the synergistic antioxidative efficiency of the designed nanozyme.
• To investigate the therapeutic potential of the nanocomposite in an in vivo anti-inflammation model.

Main Methods:

• Development of a nanocomposite using selenium (Se) nanoparticles and polydopamine (pDA).
• Characterization of the nanocomposite's antioxidant properties, including glutathione peroxidase-mimic capacity.
• In vivo evaluation using a mouse model of pneumonia to assess anti-inflammatory effects.

Main Results:

• The Se@pDA nanozyme effectively mimicked both enzymatic (Se) and non-enzymatic (pDA) antioxidants.
• The nanozyme exhibited synergetic antioxidative efficiency, protecting cellular components from oxidative damage.
• Significant anti-inflammatory effects were observed in the mouse pneumonia model.

Conclusions:

• The Se@pDA nanozyme successfully mimics natural antioxidant defense systems.
• This novel biomimetic nanocomposite shows promise for treating oxidative stress-related conditions.
• The findings support the potential application of Se@pDA in anti-inflammation therapy.