Parallel Evolution of Antibody Affinity and Thermal Stability for Optimal Biotherapeutic Development

Area of Science:

• Biotechnology
• Immunology
• Molecular Biology

Background:

• Naïve antibody libraries are valuable for identifying therapeutic binding domains due to their broad epitope targeting.
• However, these antibodies frequently exhibit low target affinity and potential molecular instability from non-native domain pairing.

Purpose of the Study:

• To develop effective methods for simultaneously improving antibody affinity and thermal stability.
• To address limitations of naïve antibody libraries for therapeutic applications.

Main Methods:

• Utilizing mutant antibody library phage display.
• Implementing carefully designed selection strategies for parallel evolution.
• Coupling library construction with selection for enhanced binding domains.

Main Results:

• Demonstrated effective parallel evolution of antibody affinity and thermal stability.
• Overcame challenges associated with non-native v-domain pairing in large libraries.
• Generated stable, high-affinity binding domains from naïve libraries.

Conclusions:

• The described methods enable the optimization of naïve antibody libraries for therapeutic development.
• Enhanced affinity and stability are achievable through combined phage display and selection techniques.
• This approach facilitates preclinical proof-of-concept studies with improved antibody candidates.