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Science. 2003 Sep 5;301(5638):1374-7. Epub 2003 Aug 14.

Predominant autoantibody production by early human B cell precursors.

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  • 1Laboratory of Molecular Immunology, Rockefeller University, New York, NY 10021, USA.

Abstract

During B lymphocyte development, antibodies are assembled by random gene segment reassortment to produce a vast number of specificities. A potential disadvantage of this process is that some of the antibodies produced are self-reactive. We determined the prevalence of self-reactive antibody formation and its regulation in human B cells. A majority (55 to 75%) of all antibodies expressed by early immature B cells displayed self-reactivity, including polyreactive and anti-nuclear specificities. Most of these autoantibodies were removed from the population at two discrete checkpoints during B cell development. Inefficient checkpoint regulation would lead to substantial increases in circulating autoantibodies.

PMID:
12920303
[PubMed - indexed for MEDLINE]
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