Journal
SCANDINAVIAN JOURNAL OF IMMUNOLOGY
Volume 59, Issue 1, Pages 66-70Publisher
BLACKWELL PUBLISHING LTD
DOI: 10.1111/j.0300-9475.2004.01358.x
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Mycobacterium tuberculosis culture filtrate protein-10 (CFP-10) (Rv3874) is considered a promising antigen for the immunodiagnosis of tuberculosis (TB) together with early secreted antigens of M. tuberculosis (ESAT-6). Both ESAT-6 and CFP-10 are encoded by the RD1 region that is deleted from all tested M. bovis bacille Calmette-Guerin (BCG) strains but present in M. leprae, M tuberculosis, M bovis, M kansasii, M africanum and M marinum. In this study, the homologue of CFP-10 in M leprae (ML0050) is identified and characterized. Interferon-gamma production in response to this homologue by T cells from leprosy patients, TB patients and unexposed controls shows that CFP-10 of M leprae is a potent antigen that crossreacts with CFP-10 of M tuberculosis at the T-cell level. This crossreactivity has implications for the use of CFP-10 of these mycobacterial species as diagnostic tool in areas endemic for both the diseases.
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