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Low affinity, antibody binding of an Escherichia coli-derived component

In English

Författare

Summary, in English

This investigation describes the detection of a component in Escherichia coli capable of binding a large proportion of human antibody variable domains including otherwise highly monospecific antibodies induced by an in vivo antibody response. This interaction is of low affinity, but cross-linking of IgG molecules by, e.g. anti-immunoglobulin preparations, provides a sufficient degree of multivalency to promote a high avidity interaction. This binding which occurs both with K and h light chain-containing antibodies, appears to involve the variable region of human antibodies making it a superantigen-like activity. This is proposed based on the facts that: (i) different human antibodies of IgG1 isotype appear to bind to different extents suggesting that variable domain differences determine the binding activity; and (ii) addition of soluble antigen abrogates the interaction with the E. coli-derived molecule. Future studies of the nature and possible in vivo consequences of these interactions are warranted since any superantigen activity associated with this binding might affect the human immune response occurring as a consequence of E. coli infections.

Publiceringsår

1996-02

Språk

Engelska

Sidor

161-168

Publikation/Tidskrift/Serie

FEMS Immunology and Medical Microbiology

Volym

13

Issue

2

Dokumenttyp

Artikel i tidskrift

Förlag

Wiley-Blackwell

Nyckelord

  • Antibody variable domain
  • Antibody-binding molecule
  • Escherichia coli
  • Superantigen

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0928-8244