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  • 1
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: An immunodominant T-cell-stimulatory epitope located near the carboxy terminus of the 38-kDa antigen from M. tuberculosis (38.G, residues 350–369) was found to be M. tuberculosis-complex specific. This was demonstrated by the presence of proliferative and delayed type hypersensitivity (DTH) responses in mice immunized with Mycobacterium tuberculosis and Mycobacterium bovis BCG, whereas mice immunized with M. avium or other non-tuberculous species of mycobacteria showed no such responses. Peptide 38.G stimulated the proliferation of peripheral blood lymphocytes from healthy purified protein derivative (PPD)-positive individuals but not from PPD-negative individuals. It also elicited DTH responses in M. tuberculosis sensitized mice and in PPD-positive healthy human volunteers. Peptide 38.G could therefore prove to be an important component in any new molecularly defined reagent used in the immunodiagnosis of tuberculous infection.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, U.K. and Cambridge, USA : Blackwell Science Ltd
    Scandinavian journal of immunology 45 (1997), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Mycobacterium tuberculosis is the single, most important cause of morbidity attributable to a single infectious organism. CD8+ T cells play an important role in anti-tuberculous immune responses in both mice and humans. Data concerning the identity of mycobacterial antigens recognized by CD8+ T cells is limited; consequently, few CTL epitopes have been characterized. The authors identified allele-specific (H-2b and d) MHC class I binding motifs in six prominent M. tuberculosis protein antigens (the 19 and 38 kDa lipoglycoproteins and the 10, 16, 65 and 70 kDa stress proteins). These predicted epitopes were tested for MHC binding as well as their ability to elicit peptide-specific CTL following in vivo priming. The authors were able to identify eight previously undescribed mycobacterial CTL epitopes by using spleen cells from peptide-immunized mice. In addition, CTL specific for at least one of these epitopes also recognized the naturally processed epitope presented on transfected EL4 target cells. These mycobacteria-derived CTL epitopes could be important for future analysis of the involvement of CD8+ T cells in M. tuberculosis infection, pathogenesis and vaccine development.
    Type of Medium: Electronic Resource
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