DistinctH-2complex control of mortality, and immune responses to tuberculosis infection in virgin and BCG-vaccinated mice
- 1 November 1993
- journal article
- Published by Oxford University Press (OUP) in Clinical and Experimental Immunology
- Vol. 94 (2), 322-329
- https://doi.org/10.1111/j.1365-2249.1993.tb03451.x
Abstract
We have studied the impact of distinct haplotypes and of different alleles at specific H-2 loci on: (i) the susceptibility to lethal form of experimental tuberculosis; (ii) the level of DTH to mycobacterial antigens; (iii) the efficacy of vaccination with bacille Calmette-Guérin (BCG); and (iv) the IgG production and T cell proliferative response to H37Rv antigens. On the basis of median survival time (MST) following primary inoculation with lethal dose of Mycobacterium tuberculosis, susceptibility to infection associated with I-Ab and Db alleles, host resistance associated with I-Ak and Dd alleles. Mice bearing a disease-resistant phenotype also developed a vigorous DTH response. Vaccination with BCG before H37Rv infection significantly prolonged the survival time of both resistant and susceptible animals, except in B10.M (H-2f) mice. The latter exhibited intermediate resistance to infection before but slight decrease in the MST following a high-dose BCG vaccination. Distinct H-2 regulation of susceptibility to lethal infection and of BCG vaccination efficacy was confirmed in another relatively resistant H-2f-bearing strain A.CA, in which mortality occurred more rapidly in vaccinated compared with primarily infected animals. The expression of the H-2f haplotype was associated with a low DTH response to tuberculin following vaccination and subsequent lethal infection. The lack of BCG protection against Myco, tuberculosis challenge in B10.M mice associated with the high titre of specific IgG. In addition, these mice exhibited a unique ability to respond to 65-kD antigen by both IgG synthesis and T cell proliferation.This publication has 70 references indexed in Scilit:
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