Biodegradable polymeric microsphere-based vaccines and their applications in infectious diseases

Area of Science:

• Immunology
• Materials Science
• Public Health

Background:

• Infectious diseases remain a leading cause of death in developing nations, often due to incomplete childhood immunization schedules and the need for repeated vaccine administrations.
• Current vaccination strategies face challenges in achieving high coverage, particularly in resource-limited settings, necessitating innovative delivery systems.

Purpose of the Study:

• To review the function of biodegradable polymeric microspheres for controlled release vaccine delivery.
• To explore the application of these microspheres in single-dose parenteral and mucosal vaccination strategies.
• To discuss the potential of surface-modified polymeric particles in developing vaccines for challenging diseases like cancer and HIV.

Main Methods:

• Review of literature on sustained and pulsatile release mechanisms of biodegradable polymeric microspheres.
• Analysis of active-targeting strategies using polymeric particles for vaccine delivery.
• Examination of polymeric particle functions including shielding and co-delivery.

Main Results:

• Biodegradable polymeric microspheres enable controlled release, potentially obviating the need for repeat immunizations.
• Polymeric particles can be engineered for active targeting, shielding, and co-delivery, enhancing vaccine efficacy.
• Surface-modifiable polymeric particles are being developed for single-dose vaccines against cancers and infectious diseases, including HIV.

Conclusions:

• Biodegradable polymeric microspheres represent a promising platform for developing effective single-dose vaccines.
• These advanced vaccine carriers offer multiple benefits, including improved delivery and potential for broad application in public health.
• Further development of polymeric particle technology can address critical unmet needs in vaccine development for infectious diseases and cancer.