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In vitro anti-acetylcholine receptor antibody synthesis by myasthenia gravis patient lymphocytes: Correlations with thymic histology and thymic epithelial-cell interactions

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Abstract

In vitro anti-acetylcholine receptor antibody (anti-AChR Ab) production by peripheral blood lymphocytes (PBL) and thymic lymphocytes was investigated in 52 patients with myasthenia gravis (MG). There was a positive correlation betweenin vitro anti-AChR Ab synthesis andin vivo titers. A relationship between the rates of synthesis by PBL and histological abnormalities of the thymus was also observed. Patients with hyperplastic thymus tended to produce the largest amountsin vitro, while those with an involuted thymus produced little or none. Production in thymoma patients is likely to correlate with the histological nature of the thymus associated with the tumor.In vitro Ab synthesis was modulated by the depletion of a cell subset for half of the patients tested. Finally, anti-AChR Ab production by thymocytes but not by PBL is enhanced by the addition of autologous or allogeneic thymic epithelial cells, suggesting a possible role of thymic epithelial cells in the autosensitization against AChR occurring in the thymus.

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Authors and Affiliations

  1. CNRS UA 04-1159, Centre Marie Lannelongue, 133 avenue de la Résistance, 92350, Le Plessis-Robinson, France

    D. Safar & S. Berrih-Aknin

  2. INSERM U25, Hôpital Necker, 161 rue de Sèvres, 75730, Paris, France

    E. Morel

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  1. D. Safar
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  2. S. Berrih-Aknin
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  3. E. Morel
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Safar, D., Berrih-Aknin, S. & Morel, E. In vitro anti-acetylcholine receptor antibody synthesis by myasthenia gravis patient lymphocytes: Correlations with thymic histology and thymic epithelial-cell interactions. J Clin Immunol 7, 225–234 (1987). https://doi.org/10.1007/BF00915728

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