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Updated: Aug 4, 2026
08:51
Identification of Mouse and Human Antibody Repertoires by Next-Generation Sequencing
Published on: March 15, 2019
Functional diversity of natural IgM
C Brissac1, A Nobrega, J Carneiro
1Unité d'Immunobiologie, Institut Pasteur, 25 rue du Dr Roux, 75015 Paris, France. cbrissac@pasteur.fr
International Immunology
|August 28, 1999
Summary
This study introduces a quantitative immunoblot method to measure antibody repertoire diversity. Researchers developed an index of variability (IV) to estimate the number of B cell clones in unknown antibody mixtures.
Area of Science:
- Immunology
- Biotechnology
- Bioinformatics
Background:
- Characterizing antibody repertoire diversity is crucial for understanding immune responses.
- Existing methods often lack quantitative precision for complex antibody mixtures.
Purpose of the Study:
- To develop a quantitative method for assessing antibody repertoire diversity using quantitative immunoblot (QIB).
- To establish an 'index of variability' (IV) for estimating the number of B cell clones.
Main Methods:
- Calibrating QIB using antibody supernatants from known B cell clone numbers.
- Defining and measuring the 'index of variability' (IV) based on reactivity profiles.
- Utilizing a mathematical model based on the Poisson distribution for calibration.
Main Results:
- A quantitative 'index of variability' (IV) was defined, which decreases with increasing repertoire diversity.
- Reactivity profiles converge towards a common profile as diversity increases.
- The calibration procedure, supported by a Poisson distribution model, accurately predicts observed convergence.
Conclusions:
- The developed method allows for the quantitative estimation of antibody repertoire diversity from IV measurements.
- The functional diversity of natural serum IgM in mice was estimated to be approximately 16,000 clones.
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