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Research Article Free access | 10.1172/JCI113731

Kappa/lambda immunoglobulin distribution in Graves' thyroid-stimulating antibodies. Simultaneous analysis of C lambda gene polymorphisms.

R C Williams Jr, N J Marshall, K Kilpatrick, J Montano, P M Brickell, M Goodall, P A Ealey, B Shine, A P Weetman, and R K Craig

Department of Medicine, University of New Mexico School of Medicine, Albuquerque 87131.

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Department of Medicine, University of New Mexico School of Medicine, Albuquerque 87131.

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Department of Medicine, University of New Mexico School of Medicine, Albuquerque 87131.

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Department of Medicine, University of New Mexico School of Medicine, Albuquerque 87131.

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Published October 1, 1988 - More info

Published in Volume 82, Issue 4 on October 1, 1988
J Clin Invest. 1988;82(4):1306–1312. https://doi.org/10.1172/JCI113731.
© 1988 The American Society for Clinical Investigation
Published October 1, 1988 - Version history
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Abstract

From patients with untreated Graves' disease 11 sera showing high cAMP release in the FRTL-5 cell assay were studied for relative proportions of kappa or lambda Ig molecules showing cAMP releasing activity. Immunoabsorption of gamma-globulins was performed using monoclonal murine anti-kappa or anti-lambda antibodies linked to cyanogen bromide-activated sepharose. Specific kappa- or lambda-adsorbed fractions were also eluted from immunoabsorbents using chaotrophic thiocyanate buffers and equilibrated with pH 7.4 low salt buffer by dialysis. Immunoabsorption and elution experiments showed that five Graves' sera contained predominant cAMP-releasing activity within lambda Ig fractions, whereas two Graves' sera showed predominant cAMP-releasing activity in kappa Ig fractions. Four sera showed cAMP release approximately equally divided between kappa and lambda Ig both after immunoabsorption and specific anti-kappa or anti-lambda eluates were studied. C lambda genotypes were examined by Southern blotting and restriction fragment length polymorphism analysis of Eco RI-digested genomic DNA from 158 patients with Graves' disease in parallel with 112 normal controls and 29 patients with autoimmune hypothyroidism. Notable shifts in proportions of 8/8 and 18/18 genotypes were present when Graves' patients were compared with normal controls. Allelic frequencies and ratios of genotype 8 to 18 were significantly different (P less than 0.05) when Graves' patients were compared either to normal controls or to patients with autoimmune hypothyroidism.

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