Abstract
We have examined the humoral and cellular responses of SLE patients to peptides based on the complementarity-determining regions (CDR) of a monoclonal anti-DNA antibody with a major idiotype-16/6 Id, in comparison to their responses to the whole 16/6 Id-bearing antibody. Sera of 63% of the SLE patients had antibodies that bound the 16/6 Id, 80% had antibodies to one of the CDR-based peptides, and 40% of the patients reacted with both CDRs. Sera of only a few controls reacted with either the 16/6 Id (6%) or the CDR based peptides (4%) (P < 0.01). Peripheral blood lymphocytes (PBL) of 39% of the patients proliferated in response to the 16/6 Id or to one of the CDR-based peptides (37%), while in the control group the proliferation rates were 66% to the 16/6 Id and 59% to one of the CDR-based peptides (P < 0.05). The correlation between (both) the humoral and cellular immune responses to the CDR-based peptides and to the 16/6 Id suggests the relevance of these peptides to the 16/6 Id and provides additional information on the pathogenic moiety of the latter antibody.
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Dayan, M., Segal, R., Sthoeger, Z. et al. Immune Response of SLE Patients to Peptides Based on the Complementarity Determining Regions of a Pathogenic Anti-DNA Monoclonal Antibody. J Clin Immunol 20, 187–194 (2000). https://doi.org/10.1023/A:1006685413157
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DOI: https://doi.org/10.1023/A:1006685413157