Method for generation of human hyperdiversified antibody fragment library

Area of Science:

• Biotechnology
• Immunology
• Molecular Biology

Background:

• In vitro screening offers an alternative to hybridoma technology for antibody fragment selection.
• Library complexity is crucial for isolating high-affinity antibodies.
• Current methods face limitations in generating sufficient diversity.

Purpose of the Study:

• To develop a method for creating hyperdiversified antibody fragment libraries.
• To mimic the natural somatic hypermutation process for antibody gene diversification.
• To improve the selection of specific, high-affinity antibodies.

Main Methods:

• Utilized MutaGen, a mutagenesis technology, on human immunoglobulin variable genes.
• Employed low-fidelity human polymerases (mutases) to introduce random mutations.
• Applied the process to entire variable domains, including frameworks and CDRs.
• Generated libraries with an average of 1.8 mutations per 100 amino acids.

Main Results:

• Successfully created hyperdiversified antibody fragment libraries.
• Achieved complementary mutation patterns with random distribution.
• Demonstrated the potential for broad applicability across various targets.

Conclusions:

• MutaGen technology enables the generation of highly diverse antibody fragment libraries.
• This method mimics natural somatic hypermutation for enhanced antibody discovery.
• The developed libraries are expected to facilitate the selection of antibodies for virtually any target.