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The operation of immunological networks in Graves' disease
Abstract:
Association between Graves' disease and HLA--B8 has been previously documented, as have been associations between 1 gG heavy chain allotype markers (Gm). We found a significant increase in the phenotype fnb/fb (ie. positivity for fb) in patients with Graves' disease compared to controls, raising the possibility of allotypic restriction of thyroid stimulating antibodies thought to be causally related to the disease. The influence of fb on the susceptibility to Graves' disease was found to be independent of HLA--B8 status suggesting that the immunological network operated by the Histocompatibility-linked genes is independent of that centered around IgG allotypes. It is postulated that, whereas the former genes determine the level of helper T lymphocyte function in the production of thyroid stimulating antibodies in Graves' disease, a person who also happens to carry the Gm marker fb would be assured of the production of IgG antibodies with thyroid stimulatory activity.
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