Recent advances in vaccine delivery.

Area of Science:

• Vaccinology and immunology
• Biomaterials science
• Drug delivery systems

Background:

• Vaccines are shifting towards safer protein/peptide antigens, which are less immunogenic than whole pathogens.
• These novel antigens necessitate more potent adjuvant formulations to elicit effective immune responses.
• Antigen delivery carriers are emerging as crucial components in modern vaccine development.

Purpose of the Study:

• To review patent applications concerning antigen delivery carriers for vaccine development.
• To highlight the role of carriers in enhancing antigenicity and adjuvant effects.
• To explore the application of these carrier systems in therapeutic vaccination.

Main Methods:

• Analysis of patent literature focusing on antigen delivery systems.
• Identification of carrier materials, particularly polymers and lipids.
• Categorization of disclosed technologies based on system design, preparation, and application.

Main Results:

• Patent landscape reveals diverse biocompatible antigen delivery systems, primarily polymer- and lipid-based.
• Disclosed innovations include novel carrier designs, preparation methods, and applications for new antigens.
• Significant focus on utilizing these carrier technologies for advanced therapeutic vaccination strategies.

Conclusions:

• Polymer and lipid-based carriers are pivotal in overcoming the immunogenicity challenges of subunit vaccines.
• These delivery systems offer multifaceted benefits, including antigen protection, controlled release, and intrinsic adjuvant activity.
• Patent activity underscores the growing importance of advanced delivery technologies in the future of vaccine development, particularly for therapeutic applications.