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  • Title: Antigens of Mycobacterium leprae identified by immunoprecipitation with sera from leprosy and tuberculosis patients.
    Author: Britton WJ, Hellqvist L, Garsia RJ, Basten A.
    Journal: Clin Exp Immunol; 1988 Mar; 71(3):394-8. PubMed ID: 3289801.
    Abstract:
    Mycobacterial antigens which react with human B lymphocytes were investigated by immunoprecipitation of radiolabelled sonicates of Mycobacterium leprae and M. bovis (BCG) with sera from patients with leprosy and tuberculosis in the presence of Staphylococcus aureus. SDS-PAGE analysis of the immunoprecipitates demonstrated that dense bands of Mr 12,000 (12K), 15K, 27K, 32-33K, 36K and 48K were the major antigens of M. leprae recognized by antibodies in lepromatous leprosy sera. Of these, only the 15-16K band reacted significantly with sera from patients with tuberculoid leprosy and tuberculosis. Other antigens including the T cell immunogens of Mr 18K and 70K reacted with some of the BL/LL sera tested. There were differences in the pattern of antigens precipitated from BCG sonicate by leprosy sera with the 65K antigen and a high molecular weight band (greater than 94K) being readily detected. These results differ in part to these obtained by probing immunoblots of M. leprae sonicate with leprosy sera. Factors contributing to these differences are discussed.
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