Abstract
Autoimmunity to a 28-29-kDa cell-surface DNA-binding molecule has previously been described in patients with systemic lupus erythematosus and related autoimmune diseases. This report describes experiments that implicate a similar antigen-antibody system in the evolution of autoimmunity in lupus-prone mice. DNA binding to murine spleen cells was found to be a saturable phenomenon that was inhibited by excess cold DNA and trypsinization. The role of autoimmunity to murine cell-surface DNA-binding molecules in lupus-prone mice (MRL lpr/lpr, MRL + / +, BXSB) was compared to normal mice (BALB/c, C3H.SW) by means of an assay that measured the inhibition of cell-surface DNA binding. Only sera from lupus strains had inhibitory activity and this component was shown to be an IgM autoantibody. Furthermore, we isolated a spontaneously occurring IgM monoclonal antibody from the spleen of an MRL/lpr mouse, which inhibited DNA binding to mouse cells. Time-course studies indicated that young female MRL/lpr mice lacked detectable activity against cell- surface DNA-binding molecules; however, by 8-10 weeks maximal inhibitory activity was observed. This response occurred prior to the development of significant antinuclear antibody activity. With the appearance of overt disease and anti-DNA antibodies, inhibition of DNA- binding activity became undetectable. These findings mirror previous studies on autoimmunity to a cell-surface DNA-binding molecule on human leucocytes, but have the added advantage of permitting the study of the temporal evolution of this inhibitory activity in relation to disease expression.
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Dates
Type | When |
---|---|
Created | 17 years, 9 months ago (Nov. 26, 2007, 7:27 p.m.) |
Deposited | 6 months ago (Feb. 28, 2025, 12:51 p.m.) |
Indexed | 1 month ago (Aug. 2, 2025, 12:39 a.m.) |
Issued | 33 years, 4 months ago (May 1, 1992) |
Published | 33 years, 4 months ago (May 1, 1992) |
Published Online | 33 years, 4 months ago (May 1, 1992) |
Published Print | 33 years, 4 months ago (May 1, 1992) |
@article{Hefeneider_1992, title={DNA Binding to Mouse Cells is Mediated by Cell-Surface Molecules: The Role of These DNA-Binding Molecules as Target Antigens in Murine Lupus}, volume={1}, ISSN={1477-0962}, url={http://dx.doi.org/10.1177/096120339200100308}, DOI={10.1177/096120339200100308}, number={3}, journal={Lupus}, publisher={SAGE Publications}, author={Hefeneider, Steven H. and McCoy, Sharon L. and Morton, Jane I. and Bakke, Antony C. and Cornell, Kenneth A. and Brown, Lisa E. and Bennett, Robert M.}, year={1992}, month=may, pages={167–173} }