Simple rapid method for the preparation of enteric-coated microspheres

Area of Science:

• Biomaterials Science
• Drug Delivery Systems
• Biotechnology

Background:

• Effective encapsulation of high molecular weight biological materials is crucial for their stability and targeted delivery.
• Existing methods can be complex, costly, or may affect the integrity of sensitive biomolecules.

Purpose of the Study:

• To present a simple, inexpensive, and rapid method for encapsulating high molecular weight biological materials using cellulose acetate phthalate.
• To evaluate the stability and integrity of encapsulated biological materials under simulated physiological conditions.

Main Methods:

• High molecular weight biological materials (e.g., viral antigen, concanavalin A, proteins) were encapsulated using cellulose acetate phthalate.
• The encapsulation process duration was approximately 15 minutes, yielding microspheres 1-3 mm in diameter.
• Stability was tested in simulated gastric and intestinal conditions.

Main Results:

• The encapsulation method was rapid (approx. 15 min) and produced stable microspheres (1-3 mm).
• Microspheres demonstrated stability in simulated gastric conditions for at least 6 hours.
• Rapid disintegration occurred under simulated intestinal conditions, suggesting potential for targeted release.
• Encapsulation did not affect the biological activity of the encapsulated materials.

Conclusions:

• A simple, cost-effective, and rapid method for encapsulating high molecular weight biologicals with cellulose acetate phthalate has been developed.
• The method yields stable microspheres that preserve biological activity and exhibit differential stability in simulated gastrointestinal environments.
• This technique holds significant potential for the encapsulation and delivery of various drugs and other biological substances.