Binding of polyreactive antibodies to self versus foreign antigens.

Journal Article

Aside from their ability to bind to multiple antigens, the classic hallmark of polyreactive antibodies is their autoreactivity. Because of their ability to bind a number of common autoantigens, it has long been speculated that polyreactive antibodies are involved in the clearance of self-antigens. However, it has been demonstrated more recently that polyreactive antibodies are also capable of binding to some foreign and synthetic antigens. Although data regarding the relative reactivity of polyreactive antibodies with self versus foreign antigens is lacking, it is generally thought that both activities may play an important biological role. In this study, the relative reactivity of polyclonal human polyreactive IgM with human proteins and tissue extracts versus foreign (xenogeneic) proteins and tissue extracts was probed. The binding of affinity purified anti-ssDNA IgM from adult human serum and the binding of polyreactive IgM in human cord serum and in human adult serum were evaluated. Using competitive and direct binding assays, human polyreactive IgM were found to be generally more reactive with foreign (xenogeneic) proteins than with self or allogeneic proteins. These data shed light on the fundamental nature of polyreactive antibodies, and may provide additional insight into their putative biological roles.

Full Text

Duke Authors

Cited Authors

  • Lee, W; Gaca, JG; Edwards, LA; Braedehoeft, SJ; Parker, W; Davis, RD

Published Date

  • March 2002

Published In

Volume / Issue

  • 205 / 1

Start / End Page

  • 95 - 107

PubMed ID

  • 11999347

International Standard Serial Number (ISSN)

  • 0171-2985

Digital Object Identifier (DOI)

  • 10.1078/0171-2985-00113

Language

  • eng

Conference Location

  • Netherlands