Abstract:
:Earlier data suggest that gamma/delta T cells may play an important role in the immune response to Mycobacterium tuberculosis. The aim of this study was to determine the percentage of different gamma/delta subsets in peripheral blood of active tuberculosis patients with a positive or negative tuberculin reaction. Thirty-eight patients infected with M. tuberculosis and 22 healthy controls were included in the study. Venous blood was taken before starting antimycobacterial treatment. Lymphocytes were reacted with monoclonal antibodies specific for different gamma/delta V chains (Vdelta1, Vdelta2, Vgamma9 and Vgamma4). The results were analysed in the context of tuberculin reactivity and X-ray findings. Our results revealed a selective loss of Vgamma9/Vdelta2 T cells in the peripheral blood of tuberculin-negative patients with active tuberculosis compared to healthy controls, while the ratio of Vgamma9/Vdelta2 T cells in the peripheral blood of patients with a positive skin test did not differ from that of healthy controls. These findings demonstrate a relationship between the loss of the major M. tuberculosis-reactive subset of gammadelta T cells and the absence of tuberculin reactivity. The data are consistent with the hypothesis that gammadelta T cells play a role in the protective immune response to M. tuberculosis infection.
journal_name
Clin Exp Immunoljournal_title
Clinical and experimental immunologyauthors
Szereday L,Baliko Z,Szekeres-Bartho Jdoi
10.1046/j.1365-2249.2003.02063.xsubject
Has Abstractpub_date
2003-02-01 00:00:00pages
287-91issue
2eissn
0009-9104issn
1365-2249pii
2063journal_volume
131pub_type
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