Making Universal Vaccines and Antibodies Through Glycoengineering

Area of Science:

• Biochemistry and Molecular Biology
• Immunology
• Vaccinology

Background:

• Biological glycosylation modulates biomolecule structure and function, crucial for cell surface glycoproteins.
• Viruses utilize host glycosylation to form a protective sugar coat, aiding infection and immune evasion.
• Key viral immunogens, like those in influenza and COVID viruses, are shielded by this glycosylation.

Purpose of the Study:

• To explore the impact of glycosylation engineering on viral structures.
• To investigate the potential for developing universal vaccines by altering viral glycosylation.
• To assess the enhancement of antibody-mediated killing through Fc-glycan engineering.

Main Methods:

• Review of existing literature on biological glycosylation and viral structure.
• Analysis of strategies for deleting or modifying viral surface glycans.
• Examination of antibody Fc-glycan engineering techniques.

Main Results:

• Deletion of viral sugar coats exposes conserved epitopes, eliciting broader antibody and T cell responses.
• Low-sugar vaccines induce more diverse antibodies with higher titers against conserved epitopes.
• Engineered Fc-glycans on antibodies improve antibody-dependent cellular cytotoxicity (ADCC).

Conclusions:

• Glycosylation engineering is a promising strategy for developing broadly protective universal vaccines.
• Antibody Fc-glycan modifications can enhance therapeutic antibody functions, including immune cell-mediated killing.
• Targeting viral glycosylation offers a novel approach to combat viral infections and variants.