Single-step formation of degradable intracellular biomolecule microreactors

Area of Science:

• Biomaterials Science
• Chemical Engineering
• Biotechnology

Background:

• Encapsulating biomolecules like enzymes and proteins into stable structures is crucial for various applications.
• Existing methods often involve complex procedures or harsh conditions that can compromise biomolecule activity.

Purpose of the Study:

• To develop a simple, single-step, all-aqueous method for encapsulating biomolecules into stable microreactors.
• To investigate the role of polyelectrolytes and mannitol in preserving biomolecule activity and creating microreactor structures.

Main Methods:

• Utilizing spray-drying to combine biomolecules with oppositely charged polyelectrolytes and mannitol (sacrificial template).
• Employing an all-aqueous system to avoid harsh organic solvents.
• Analyzing the resulting microparticles for stability, nanopore formation, and biomolecule activity preservation.

Main Results:

• Spray-drying with polyelectrolytes suppressed mannitol crystallization, yielding amorphous mannitol that enhanced biomolecule preservation.
• Mannitol dissolution upon rehydration created nanopores within the microparticles.
• The polyelectrolyte framework stabilized the microparticles during rehydration.
• Demonstrated versatility using horseradish peroxidase and ovalbumin.

Conclusions:

• The developed spray-drying method offers an effective and gentle approach for creating stable, nanoporous microreactors for biomolecules.
• This technique successfully preserves the activity of encapsulated enzymes and proteins.
• The method shows promise for applications requiring stable and functional biomolecular encapsulation.