New Strategies Toward Edible Vaccines: An Overview

Area of Science:

• Biotechnology
• Vaccinology
• Plant Molecular Biology

Background:

• Edible vaccines, utilizing plant-based expression systems, are gaining traction as a cost-effective and accessible alternative to conventional vaccines.
• Incorporating antigenic peptides into edible plant parts allows for raw administration, simplifying delivery and reducing healthcare burdens.
• Key advantages include low production costs, simplified storage, transportation, and administration, crucial for global health initiatives.

Purpose of the Study:

• To provide a comprehensive overview of diverse plant expression systems employed in edible vaccine development.
• To analyze the advantages and disadvantages associated with each plant-based vaccine production system.
• To identify and discuss the challenges in edible vaccine production, particularly concerning antigen concentration, and propose solutions.

Main Methods:

• Review and comparison of various plant expression systems (e.g., banana, rice, potato, tobacco) for vaccine production.
• Analysis of experimental data regarding antigen yield and immunogenicity across different systems.
• Exploration of nanotechnology as a potential strategy to enhance antigen expression and efficacy.

Main Results:

• Several plant systems (banana, rice, alfalfa, mushroom, potato, tomato, pea, tobacco, maize) have been investigated for edible vaccine production.
• A primary limitation identified across systems is the insufficient concentration of foreign antigens, hindering effective immune responses.
• The efficacy of edible vaccines is often compromised by low antigen expression levels in the plant host.

Conclusions:

• The development of edible vaccines presents a promising avenue for disease prevention due to their accessibility and affordability.
• Overcoming the challenge of low antigen concentration is critical for the successful implementation of edible vaccine technology.
• Integrating nanotechnology into current edible vaccine production protocols offers a viable solution to enhance antigen expression and improve vaccine efficacy.