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Enzyme-Based Synthetic Protein Nanoparticles as Colloidal Antioxidants.

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|October 6, 2025
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Summary

Researchers developed novel enzyme-based nanoparticles using catalase. These targeted catalase-based synthetic protein nanoparticles (CAT-SPNPs) show enhanced activity and protect against oxidative stress, improving therapeutic enzyme delivery.

Keywords:
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Area of Science:

  • Biotechnology
  • Nanomedicine
  • Enzymology

Background:

  • Protein nanoparticles offer biocompatibility and tunable properties for drug delivery.
  • Therapeutic enzymes are valuable due to specificity and proven efficacy in various diseases.
  • Electrohydrodynamic jetting is a technique for fabricating protein-based materials.

Purpose of the Study:

  • To develop a novel class of protein nanoparticles incorporating therapeutic enzymes.
  • To investigate the properties and efficacy of catalase-based synthetic protein nanoparticles (CAT-SPNPs).
  • To enhance the drug-like properties of therapeutic enzymes through nanoparticle formulation.

Main Methods:

  • Fabrication of CAT-SPNPs using electrohydrodynamic jetting with high catalase loading (up to 50%).
  • Assessment of antioxidative activity, enzymatic stability, and structural integrity of CAT-SPNPs.
  • Surface functionalization of CAT-SPNPs with targeting antibodies to enhance cellular uptake.
  • Evaluation of CAT-SPNP efficacy in protecting cells from oxidative stress in vitro.

Main Results:

  • CAT-SPNPs demonstrated sustained antioxidative activity and enhanced enzymatic efficacy compared to free catalase.
  • Particles exhibited good structural stability and high catalase loading.
  • Antibody-targeted CAT-SPNPs showed a significant increase in cellular uptake (≈12.5-fold).
  • CAT-SPNPs provided superior protection against oxidative stress, improving cell viability and reducing LDH release.

Conclusions:

  • Targeted enzyme-based synthetic protein nanoparticles (SPNPs) represent a promising platform for improving therapeutic enzyme delivery.
  • CAT-SPNPs enhance the stability and activity of catalase, offering a potent tool against oxidative stress.
  • This approach advances the development of enzyme-based nanotherapeutics for various diseases.