High-Throughput Mapping of B Cell Receptor Sequences to Antigen Specificity

Area of Science:

• Immunology
• Molecular Biology
• Biotechnology

Background:

• B cell receptor (BCR) sequencing is crucial for understanding immune responses.
• Current BCR sequencing methods offer limited insights into antigen specificity.

Purpose of the Study:

• To introduce LIBRA-seq, a novel technology for high-throughput mapping of BCR sequences to antigen specificities.
• To enable detailed analysis of B cell responses to various antigens.

Main Methods:

• LIBRA-seq involves mixing B cells with DNA-barcoded antigens.
• Single-cell next-generation sequencing recovers both antigen barcodes and BCR sequences.
• Paired heavy- and light-chain BCR sequences are mapped to cognate antigen specificities.

Main Results:

• LIBRA-seq successfully mapped antigen specificities for thousands of B cells from HIV-infected subjects.
• Predicted specificities were validated for HIV- and influenza-specific antibodies.
• The technology identified known and novel broadly neutralizing antibodies.

Conclusions:

• LIBRA-seq is a powerful tool for high-throughput antigen specificity mapping.
• This technology will significantly advance antibody discovery and vaccine development efforts.
• LIBRA-seq has broad applications for studying immune responses against diverse antigen targets.