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Variable regions of Ig heavy chain genes encoding antithyrotropin receptor antibodies of patients with Graves' disease

Journal Article · · Journal of Immunology; (United States)
OSTI ID:7285373
The authors have established EBV-transformed human B cell clones producing monoclonal antithyrotropin receptor antibodies from two patients with Graves' disease. They then isolated and characterized Ig H chain genes of 5 B cell clones with thyrotropin-binding inhibitor Ig (TBII) activity and 4 B cell clones with thyroid-stimulating antibody (TSAb) activity. They found that V[sub H] gene families used in the 5 TBII clones were diverse, including V[sub H-II, -III, -IV,] and [sub -V]. Most of V[sub H] segments used in TBII and TSAb are commonly used in other autoantibodies and fetal liver repertoire. The frequency of somatic mutations in TBII was higher than that in TSAb. In as much as the same germline V[sub H] segment (V3-23) was used for both TBII and TSAb, the frequency and position of somatic mutations may be important for generation of TBII and TSAb. 56 refs., 2 figs., 2 tabs.
OSTI ID:
7285373
Journal Information:
Journal of Immunology; (United States), Journal Name: Journal of Immunology; (United States) Vol. 152:3; ISSN 0022-1767; ISSN JOIMA3
Country of Publication:
United States
Language:
English