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Immunology logoLink to Immunology
. 1993 Sep;80(1):6–12.

Recognition of peptide epitopes of the 16,000 MW antigen of Mycobacterium tuberculosis by murine T cells.

H M Vordermeier 1, D P Harris 1, R Lathigra 1, E Roman 1, C Moreno 1, J Ivanyi 1
PMCID: PMC1422108  PMID: 7503946

Abstract

The T-cell repertoire to a prominent immunogen of Mycobacterium tuberculosis has been investigated on the assumption that differences in epitope specificity could influence the protective and pathogenic host reactions. Proliferative responses of lymph node and spleen cells to overlapping peptides, spanning the entire sequence of the 16,000 MW protein antigen were analysed in C57BL/10 and B10.BR mice. Following footpad priming and in vitro challenge with homologous peptide, 12 out of the 14 peptides tested were found to be immunogenic. However, only two peptides of residues 31-40 and 71-91 stimulated strong proliferative responses of T cells from mice which had been presensitized with either killed or live M. tuberculosis organisms; another three peptides were only weakly stimulatory. These epitopes have been immunodominant in both H-2b and H-2k mouse strains, indicating the genetically permissive nature of their recognition. Furthermore, both major immunodominant epitopes were found to be species specific for the M. tuberculosis complex and therefore potentially suitable for the early diagnosis of tuberculous infection.

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Selected References

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