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  • Title: Anti-thyroid peroxidase antibodies in sera from healthy subjects and from patients with chronic thyroiditis: differences in the ability to inhibit thyroid peroxidase activities.
    Author: Kohno Y, Yamaguchi F, Saito K, Niimi H, Nishikawa T, Hosoya T.
    Journal: Clin Exp Immunol; 1991 Sep; 85(3):459-63. PubMed ID: 1893628.
    Abstract:
    A significant percentage (6.4%) of healthy subjects was found to contain anti-thyroid peroxidase (TPO) antibodies in their sera. However, in contrast with IgG from sera of patients with chronic thyroiditis, IgG from sera of healthy subjects did not inhibit TPO activities both in guaiacol and iodide assays. In addition, anti-TPO antibodies from healthy subjects did not block the inhibition of enzyme activities by anti-TPO antibodies from patients. These findings suggest that anti-TPO antibodies from healthy subjects do not bind to the epitopes relating to substrate-combining sites of TPO. Thus, the specificities of anti-TPO antibodies in healthy subjects may differ from those in cases of chronic thyroiditis.
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