Formulation and Efficacy of Catalase-Loaded Nanoparticles for the Treatment of Neonatal Hypoxic-Ischemic Encephalopathy
| Autor: | Denise Beebout, Jim Pfaendtner, Danielle Bondurant, Chris W Nyambura, Elizabeth Nance, Thomas R. Wood, Andrea Joseph, Kylie Corry |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Antioxidant
medicine.medical_treatment Pharmaceutical Science 02 engineering and technology Pharmacology Neuroprotection Article neonatal 03 medical and health sciences chemistry.chemical_compound Pharmacy and materia medica In vivo medicine Sodium dodecyl sulfate hydrophobic-ion pairing 030304 developmental biology chemistry.chemical_classification 0303 health sciences Reactive oxygen species biology Chemistry catalase 021001 nanoscience & nanotechnology Taurocholic acid nanomedicine molecular dynamics RS1-441 hypoxia-ischemia Catalase Drug delivery biology.protein 0210 nano-technology |
| Zdroj: | Pharmaceutics Volume 13 Issue 8 Pharmaceutics, Vol 13, Iss 1131, p 1131 (2021) |
| ISSN: | 1999-4923 |
| Popis: | Neonatal hypoxic-ischemic encephalopathy is the leading cause of permanent brain injury in term newborns and currently has no cure. Catalase, an antioxidant enzyme, is a promising therapeutic due to its ability to scavenge toxic reactive oxygen species and improve tissue oxygen status. However, upon in vivo administration, catalase is subject to a short half-life, rapid proteolytic degradation, immunogenicity, and an inability to penetrate the brain. Polymeric nanoparticles can improve pharmacokinetic properties of therapeutic cargo, although encapsulation of large proteins has been challenging. In this paper, we investigated hydrophobic ion pairing as a technique for increasing the hydrophobicity of catalase and driving its subsequent loading into a poly(lactic-co-glycolic acid)-poly(ethylene glycol) (PLGA-PEG) nanoparticle. We found improved formation of catalase-hydrophobic ion complexes with dextran sulfate (DS) compared to sodium dodecyl sulfate (SDS) or taurocholic acid (TA). Molecular dynamics simulations in a model system demonstrated retention of native protein structure after complexation with DS, but not SDS or TA. Using DS-catalase complexes, we developed catalase-loaded PLGA-PEG nanoparticles and evaluated their efficacy in the Vannucci model of unilateral hypoxic-ischemic brain injury in postnatal day 10 rats. Catalase-loaded nanoparticles retained enzymatic activity for at least 24 h in serum-like conditions, distributed through injured brain tissue, and delivered a significant neuroprotective effect compared to saline and blank nanoparticle controls. These results encourage further investigation of catalase and PLGA-PEG nanoparticle-mediated drug delivery for the treatment of neonatal brain injury. |
| Databáze: | OpenAIRE |
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