Both IgM and IgG Anti-DNA Antibodies are the products of clonally selective B cell stimulation in (NZB × NZW)F1 Mice

David M. Tillman, Nainn Tsyr Jou, Robert J. Hill, Tony Marion

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Abstract

Disease activity in systemic lupus erythematosus is closely associated with the appearance of immunoglobulin (Ig)G antibody to native DNA in both humans and mice. Like normal antibody responses, the anti-DNA autoantibody first appears as IgM and then switches to IgG. Structural studies of IgG anti-DNA suggest that these antibodies are the products of clonally selected, specifically stimulated B cells. The origins of the IgM anti-DNA have been less clear. To determine whether the earlier appearing IgM anti-DNA antibody in autoimmune mice also derives from clonally selected, specifically stimulated B cells or B cells activated by nonselective, polyclonal stimuli, we have analyzed the molecular and serological characteristics of a large number of monoclonal IgM anti-DNA antibodies from autoimmune (NZB × NZW)F1 mice. We have also analyzed IgM and IgG anti-DNA hybridomas obtained from the same individual mice to determine how the later-appearing IgG autoantibody may be related to the earlier-appearing IgM autoantibody within an individual mouse. The results demonstrate that: (a) IgM anti-DNA, like IgG, has the characteristics of a specifically stimulated antibody; (b) IgM and IgG anti-DNA antibodies have similar variable region structures and within individual mice may be produced by B cells derived from the same clonal precursors; (c) recurrent germline and somatically derived VH and VL structures may influence the specificity of anti-DNA monoclonal antibody for denatured vs. native DNA; and (d) the results provide a structural explanation for the selective development of IgG antibody to native DNA as autoimmunity to DNA progresses in (NZB × NZW)F1 mice.

Original languageEnglish (US)
Pages (from-to)761-779
Number of pages19
JournalJournal of Experimental Medicine
Volume176
Issue number3
DOIs
StatePublished - Sep 1 1992

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Antinuclear Antibodies
Immunoglobulin M
B-Lymphocytes
Immunoglobulin G
DNA
Autoantibodies
Antibodies
Hybridomas
Autoimmunity
Systemic Lupus Erythematosus
Antibody Formation
Monoclonal Antibodies

All Science Journal Classification (ASJC) codes

  • Immunology and Allergy
  • Immunology

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Both IgM and IgG Anti-DNA Antibodies are the products of clonally selective B cell stimulation in (NZB × NZW)F1 Mice. / Tillman, David M.; Jou, Nainn Tsyr; Hill, Robert J.; Marion, Tony.

In: Journal of Experimental Medicine, Vol. 176, No. 3, 01.09.1992, p. 761-779.

Research output: Contribution to journalArticle

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