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Research Article Free access | 10.1172/JCI114751

HLA-DQ gene complementation and other histocompatibility relationships in man with the anti-Ro/SSA autoantibody response of systemic lupus erythematosus.

A Fujisaku, M B Frank, B Neas, M Reichlin, and J B Harley

Arthritis and Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City 73104.

Find articles by Fujisaku, A. in: PubMed | Google Scholar

Arthritis and Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City 73104.

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Arthritis and Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City 73104.

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Arthritis and Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City 73104.

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Arthritis and Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City 73104.

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Published August 1, 1990 - More info

Published in Volume 86, Issue 2 on August 1, 1990
J Clin Invest. 1990;86(2):606–611. https://doi.org/10.1172/JCI114751.
© 1990 The American Society for Clinical Investigation
Published August 1, 1990 - Version history
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Abstract

A strong gene interaction between HLA-DQ1 and DQ2 alleles has been associated with anti-Ro/SSA autoantibodies (Harley, J.B., M. Reichlin, F. C. Arnett, E. L. Alexander, W. B. Bias, and T. T. Provost. 1986. Science [Wash. DC]. 232:1145-1147; Harley, J. B., A. S. Sestak, L. G. Willis, S. M. Fu, J. A. Hansen, and M. Reichlin. 1989. Arthritis Rheum. 32:826-836; Hamilton, R. G., J. B. Harley, W. B. Bias, M. Roebber, M. Reichlin, M. C. Hochberg, and F. C. Arnett. 1988. Arthritis Rheum. 31:496-505). To test a gene complementation mechanism for these results, restriction fragment length polymorphisms (RFLP) of the DQ alpha and DQ beta genes have been related to Ro/SSA precipitins in patients with systemic lupus erythematosus. In this study Ro/SSA precipitins are related to the simultaneous presence of a particular pair of RFLPs. A DQ alpha RFLP associated with HLA-DQ1 and a DQ beta RFLP associated with HLA-DQ2 predict that the alpha beta heterodimer in HLA-DQ1/DQ2 heteroxygotes is most closely related to anti-Ro/SSA autoantibodies, thereby supporting a gene complementation mechanism. Beyond this effect, an RFLP associated with HLA-DQ2 and/or DR7 is also related to Ro/SSA precipitins. Multiple molecular histocompatibility mechanisms are implicated, therefore, in the production of anti-Ro/SSA autoantibodies in autoimmune disease. For anti-Ro/SSA autoantibodies in SLE, and perhaps more generally, these data show that the histocompatibility antigens are among the elements that confer autoimmune response specificity and restrict the production of particular autoantibodies among patients with systemic lupus erythematosus.

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