Non-specificity as the sticky problem in therapeutic antibody development

Area of Science:

• Biochemistry
• Biophysics
• Drug Development

Background:

• Antibodies are crucial therapeutic scaffolds with over a hundred approved products.
• Developing antibody-based drugs involves balancing target specificity and binding affinity.
• Non-specific interactions pose a significant challenge in antibody drug development.

Purpose of the Study:

• To review non-specific interactions in antibody therapeutics.
• To explore the fundamental physicochemical origins of these interactions.
• To identify strategies for optimizing antibody binding specificity.

Main Methods:

• Review of physicochemical principles governing protein-protein interactions.
• Analysis of surface patches (clusters of amino acid residues) as inducers of non-specific binding.
• Elucidation of supramolecular assembly processes driving interactions.

Main Results:

• Surface patches drive non-specific interactions through mechanisms like dipole-dipole, π-stacking, and hydrophobic interactions.
• These interactions are linked to macroscopic issues such as decreased physical stability and reduced in vivo half-life.
• Identified challenges and opportunities for enhancing protein binding specificity.

Conclusions:

• Minimizing non-specific interactions is critical for future antibody therapeutics.
• Understanding the physicochemical basis of non-specific binding can guide the design of more effective protein drugs.
• Optimizing specificity is essential for improving the performance and therapeutic potential of antibodies.