The detection of antithyroglobulin activity in human serum monoclonal immunoglobulins (monoclonal gammopathies)

N. Yativ*, D. Buskila, M. Blank, C. L. Burek, N. R. Rose, Y. Shoenfeld

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The sera of 159 patients with monoclonal gammopathies were examined for the presence of anti-thyroglobulin (Tg) activity. An enzyme-linked immunosorbent assay was employed. Thirty-one (19.5%) sera were found to bind Tg. The activity against Tg was further confirmed by using purified immunoglobulins and employing competition assays. The anti-Tg antibodies were found in the sera of patients with IgG, IgM and IgA gammopathies. Anti-Tg antibodies were more frequent among patients with IgG gammopathy. Autoantibodies to Tg are found in patients with Hashimoto's thyroiditis, Graves' disease and occasionally in patients with thyroid carcinoma. Natural autoantibodies directed against human Tg have been detected, as well, in healthy subjects. None of the patients in the present study whose serum was found to contain high titers of anti-Tg human monoclonal antibodies had any clinical or biochemical evidence of thyroid disease. Our results of a high incidence of anti-Tg activity in the sera of patients with monoclonal gammopathies support previous reports of autoantibody properties characteristic of these immunoglobulins.

Original languageEnglish
Pages (from-to)330-337
Number of pages8
JournalImmunologic Research
Volume12
Issue number4
DOIs
StatePublished - Dec 1993
Externally publishedYes

Keywords

  • Antithyroglobulin antibodies
  • Autoantibodies
  • Autoimmunity
  • Monoclonal gammopathies

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