Understanding Fc function for rational vaccine design against pathogens.

Area of Science:

• Immunology
• Vaccinology

Background:

• Antibodies are crucial for vaccine-induced immunity, with diverse functions like neutralization, opsonophagocytosis, and cytotoxicity.
• Antibody efficacy depends on antigen specificity (Fab) and Fc receptor (FcR) interactions, which are increasingly recognized for their role in controlling infections.

Purpose of the Study:

• To explore the critical role of Fc:FcR interactions in immune responses against pathogens.
• To understand how Fc:FcR engagement is modulated by various factors and can be harnessed for therapeutic benefit.

Main Methods:

• Review of existing evidence on antibody functions and Fc:FcR interactions in infectious diseases.
• Analysis of factors influencing Fc:FcR engagement, including antibody isotype, subclass, and post-translational modifications.

Main Results:

• Fc:FcR interactions are critical for controlling pathogen spread and disease severity.
• Fc:FcR engagement varies during infection and is influenced by host factors like age and prior exposures.
• Antibody isotype, subclass, and modifications actively shape Fc:FcR interactions.

Conclusions:

• The immune system actively utilizes Fc:FcR interactions to combat disease.
• Defining these humoral mechanisms and their modulations offers potential for developing improved vaccines.