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Hybridoma technology is used for the large-scale production of monoclonal antibodies. Monoclonal antibodies bind to only a single antigenic determinant or epitope. Such antibodies are used in research, diagnostics, and disease therapy. The hybridoma technology established in 1975 by Georges Köhler and Cesar Milstein was awarded the Nobel Prize in Medicine in 1984 for revolutionizing research and therapy.
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Related Experiment Video

Updated: May 21, 2025

Analysis of Somatic Hypermutation in the JH4 intron of Germinal Center B cells from Mouse Peyer's Patches
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Regulated somatic hypermutation enhances antibody affinity maturation.

Julia Merkenschlager1,2, Andrew G T Pyo3, Gabriela S Silva Santos4

  • 1Laboratory of Molecular Immunology, The Rockefeller University, New York, NY, USA. julia_merkenschlager@hms.harvard.edu.

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|March 20, 2025
PubMed
Summary
This summary is machine-generated.

B cells optimize antibody affinity maturation by adjusting mutation rates during cell division. High-affinity B cells divide more but mutate less, safeguarding lineages and improving immune responses.

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Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Biology

Background:

  • Germinal centers are key sites for B cell affinity maturation.
  • Somatic hypermutation introduces random mutations in immunoglobulin genes.
  • High mutation rates can lead to deleterious mutations, hindering antibody maturation.

Purpose of the Study:

  • To investigate a theoretical model for optimizing B cell affinity maturation.
  • To understand how B cells vary mutation rates based on antibody affinity.
  • To examine mechanisms safeguarding high-affinity B cell lineages.

Main Methods:

  • Experimental validation of a theoretical model.
  • Immunization of mice with SARS-CoV-2 vaccines and a model antigen.
  • Analysis of B cell cycle phases and mutation rates.

Main Results:

  • Experimental data align with the theoretical model.
  • B cells producing high-affinity antibodies exhibit shorter G0/G1 cell cycle phases.
  • High-affinity B cells demonstrate reduced mutation rates per cell division.

Conclusions:

  • B cell affinity maturation is optimized by dynamically adjusting mutation rates.
  • Shorter cell cycle phases and reduced mutation rates protect high-affinity B cell lineages.
  • These adaptive mechanisms enhance the overall effectiveness of antibody responses.