Anti-infective immunoadhesins from plants

Area of Science:

• Biotechnology
• Immunology
• Infectious Diseases

Background:

• Immunoadhesins are recombinant proteins combining ligand-binding domains with immunoglobulin constant regions.
• Currently approved immunoadhesins target inflammatory diseases by modulating receptor-ligand interactions.
• They offer advantages like long half-lives, easy purification, and bivalent binding.

Purpose of the Study:

• To explore the potential of immunoadhesins as a novel therapeutic strategy against infectious diseases.
• To highlight the advantages of immunoadhesins as decoy receptors compared to monoclonal antibodies.
• To discuss the challenges and inspire further research in developing anti-infective immunoadhesins.

Main Methods:

• Development of plant-expressed immunoadhesins targeting specific pathogen receptors.
• In vitro and in vivo testing of immunoadhesin efficacy against toxins and viruses.
• Focus on CMG2 for anthrax toxin, ICAM-1 for rhinovirus, and MERS coronavirus targets.

Main Results:

• An immunoadhesin targeting anthrax toxin (CMG2) demonstrated potent in vitro activity and in vivo protection.
• An ICAM-1-based immunoadhesin effectively blocked human rhinovirus infection in cell cultures.
• Early-stage development of an immunoadhesin targeting MERS coronavirus is underway.

Conclusions:

• Immunoadhesins represent a promising class of therapeutics for infectious diseases, acting as decoy receptors.
• Plant-based expression systems offer a viable platform for developing these anti-infective agents.
• Further research is needed to overcome challenges in designing and developing immunoadhesins for infectious disease targets.