دورية أكاديمية
أعرض في EDS

Latent tuberculosis infection treatment and T-cell responses to Mycobacterium tuberculosis-specific antigens.

التفاصيل البيبلوغرافية
العنوان: Latent tuberculosis infection treatment and T-cell responses to Mycobacterium tuberculosis-specific antigens.
المؤلفون: Chee CBE, KhinMar KW, Gan SH, Barkham TM, Pushparani M, Wang YT
المصدر: American Journal of Respiratory & Critical Care Medicine; Feb2007, Vol. 175 Issue 3, p282-287, 6p
مستخلص: RATIONALE: There is currently no available test for monitoring the effect of treatment of latent tuberculosis infection (LTBI) to indicate cure or predict risk of subsequent progression to disease. OBJECTIVE: We used the T-SPOT.TB assay, which measures T-cell interferon-gamma responses to the Mycobacterium tuberculosis-specific peptides early secretory antigenic target 6-kD protein (ESAT-6) and culture filtrate protein 10 (CFP-10), to determine the effect of LTBI treatment on these responses. METHODS: A total of 226 tuberculosis contacts with positive T-SPOT.TB results underwent repeat testing on LTBI treatment completion. The majority (96%) received 6 months of isoniazid. The pre- and post-treatment T-SPOT.TB results were analyzed according to the combined and separate responses to ESAT-6 and CFP-10 antigens. RESULTS: The T-SPOT.TB reverted to negative in 85 (37.6%) contacts at treatment completion. Treatment had a significant effect on the response to CFP-10 (p < 0.001; reversion rate, 48.6%), but not on the response to ESAT-6 (p = 0.081; reversion rate, 21.6%). The median number of spot-forming cells (SFCs)/2.5 x 10(5) peripheral blood mononuclear cells (PBMCs) pre- and post-treatment was 6 versus 4.5 for ESAT-6 (p = 0.116) and 11 versus 4 for CFP-10 (p < 0.001). There was a significant difference between the change (fall) in the pre- and post-treatment responses to CFP-10 (6 SFCs/2.5 x 10(5) PBMCs) and ESAT-6 (0 SFCs/2.5 x 10(5) PBMCs; p < 0.001). Significantly different age-related T-cell responses to the two antigens were found. CONCLUSION: LTBI treatment had a differential effect on T-cell responses to ESAT-6 and CFP-10 as measured by the T-SPOT.TB. The quantitative response to CFP-10 may be a useful LTBI treatment-monitoring tool. [ABSTRACT FROM AUTHOR]
Copyright of American Journal of Respiratory & Critical Care Medicine is the property of American Thoracic Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
قاعدة البيانات: Complementary Index
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