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Expression of specific clones during B cell development.

N R Klinman, J L Press

    Federation Proceedings
    |January 1, 1975
    PubMed
    Summary
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    Neonatal mice possess B cells that respond similarly to adult B cells but produce less antibody, primarily IgM. Analysis revealed a limited number of dominant B cell clonotypes specific for DNP and TNP antigens.

    Area of Science:

    • Immunology
    • Developmental Biology

    Background:

    • Neonatal immune responses differ from adult responses.
    • Understanding B cell development in neonates is crucial for immune system maturation.

    Purpose of the Study:

    • To analyze the frequency and characteristics of DNP- and TNP-specific B cells in neonatal mice.
    • To investigate the antibody production and clonotype diversity of neonatal B cells.

    Main Methods:

    • In vitro splenic focus technique used to analyze B cell expression.
    • Isoelectric focusing used to analyze monoclonal antibodies from stimulated neonatal B cells.

    Main Results:

    • Neonatal spleens showed a slightly higher frequency of DNP- and TNP-specific B cells compared to adults.

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  • Neonatal B cells produced predominantly IgM antibodies, with lower overall antibody output than adult B cells.
  • Over 90% of antibodies from neonatal B cells belonged to six predominant clonotypes (3 for DNP, 3 for TNP).

    • Conclusions:

    • Neonatal B cell populations are characterized by a limited repertoire of dominant clonotypes.
    • The development and regulation of B cell clones in neonates warrant further investigation.