Abstract:
:The possible immunological relationship between the pattern of Th1/Th2 cytokine production and tuberculin reactivity was assessed in patients with active Mycobacterium tuberculosis infection. The production of the intracellular cytokines interferon (IFN)-gamma and interleukin-4 (IL-4) was measured in CD4(+) and CD8(+) T cells obtained from peripheral blood and bronchoalveolar lavage fluid (BALF) of 20 tuberculin skin-positive patients and compared with the findings recorded in nine tuberculin skin-negative patients with active pulmonary tuberculosis. Upon stimulation with phorbol 12-myristate acetate/ionomycin for 6 h, tuberculin-negative patients had a significantly higher proportion of IFN-gamma-producing CD4(+) T lymphocytes in BALF than in peripheral blood, while both CD4(+) and CD8(+) T-lymphocyte subsets in BALF of tuberculin-positive patients secreted more IFN-gamma than their peripheral blood counterparts. Tuberculin-negative patients had a significantly higher proportion of IFN-gamma-producing CD4(+) T lymphocytes in peripheral blood than tuberculin-positive patients. There was no significant difference in the production of IFN-gamma by BALF CD4(+) T lymphocytes, or by either peripheral blood or BALF CD8(+) T lymphocytes. In two tuberculin-negative patients, peripheral blood CD4(+) T lymphocytes produced IL-4. Study results suggested a higher immune activity in the blood of tuberculin-negative patients, with an increased lymphocyte activity in BALF versus peripheral blood in both patient groups.
journal_name
Scand J Immunoljournal_title
Scandinavian journal of immunologyauthors
Boras Z,Juretić A,Gagro A,Pavelić Ljdoi
10.1111/j.1365-3083.2006.01890.xsubject
Has Abstractpub_date
2007-03-01 00:00:00pages
257-64issue
3eissn
0300-9475issn
1365-3083pii
SJI1890journal_volume
65pub_type
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journal_title:Scandinavian journal of immunology
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