Sonochemical proteinaceous microspheres for wound healing

Area of Science:

• Biomaterials Science
• Wound Healing Research
• Enzyme Inhibition Studies

Background:

• Chronic wounds exhibit elevated levels of human neutrophil elastase (HNE), contributing to impaired healing and tissue degradation.
• The imbalance between elastase and its inhibitors (elastase-antielastase imbalance) is a key factor in the pathophysiology of chronic wounds.

Purpose of the Study:

• To develop and evaluate proteinaceous microspheres as a novel system for controlling HNE activity in chronic wound environments.
• To investigate the impact of different organic solvents within protein microspheres on elastase inhibition efficacy.

Main Methods:

• Preparation of proteinaceous microspheres using bovine serum albumin (BSA), human serum albumin (HSA), and silk fibroin (SF).
• Incorporation of organic solvents (n-dodecane, mineral oil, vegetable oil) into the protein microspheres.
• Assessment of elastase inhibitory activity using porcine pancreatic elastase (PPE) as a model for wound exudates.
• In vitro cytotoxicity evaluation on human skin fibroblasts.

Main Results:

• Proteinaceous microspheres containing organic solvents demonstrated tunable inhibition of porcine pancreatic elastase (PPE) activity.
• The choice of organic solvent within the microspheres influenced the level of elastase inhibition.
• The developed microspheres exhibited no cytotoxicity to human skin fibroblasts in vitro.

Conclusions:

• Proteinaceous microspheres offer an innovative and tunable platform for managing elastase activity in chronic wounds.
• These microspheres can serve as effective carriers for elastase inhibitors, showing promise for advanced wound care applications.
• The biocompatibility and tunable inhibition properties make these microspheres suitable for biomedical applications in chronic wound management.