FOXP3 gene expression in a tuberculosis case contact study

被引:41
作者
Burl, S.
Hill, P. C.
Jeffries, D. J.
Holland, M. J.
Fox, A.
Lugos, M. D.
Adegbola, R. A.
Rook, G. A.
Zumla, A.
McAdam, K. P. W. J.
Brookes, R. H.
机构
[1] UCL, Ctr Infect Dis & Int Hlth, Windeyer Inst Med Sci, London W1T 4JF, England
[2] London Sch Hyg & Trop Med, Clin Res Unit, Dept Infect & Trop Med, London WC1, England
[3] Med Res Council UK Unit, Bacterial Dis Programme, TB Div, Banjul, Gambia
基金
英国医学研究理事会;
关键词
FOXP3; IL-10; T-regs; tuberculosis; REGULATORY T-CELLS; LINKED IMMUNOSPOT ASSAY; PERIPHERAL-BLOOD; IMMUNE-RESPONSES; INFECTION; CD4(+); DIAGNOSIS; RNA;
D O I
10.1111/j.1365-2249.2007.03399.x
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Regulatory T lymphocytes (T-regs) that express FOXP3 are involved in the beneficial attenuation of immunopathology, but are also implicated in down-regulation of protective responses to infection. Their role in tuberculosis (TB) is unknown. We classified 1272 healthy TB contacts according to their tuberculin skin test (TST) and interferon (IFN)-gamma enzyme-linked immunospot (ELISPOT) results and 128 TB cases, and studied the expression of FOXP3 and interleukin (IL)-10 in blood samples. Compared to the uninfected contact group (TST-, ELISPOT-), we observed higher levels of FOXP3 mRNA in blood from TB patients (< 0.001), but IL-10 expression was slightly lower (P = 0.04). In contrast, FOXP3 expression levels were significantly lower (P = 0.001) in the recently infected contacts (TST+, ELISPOT+) but there was no difference for IL-10 (P = 0.74). We hypothesize that during early/subclinical TB, most of which will become latent, FOXP3(+) T-regs may be sequestered in the lungs, but when TB becomes progressive, FOXP3 reappears at increased levels in the periphery. While these findings do not reveal the role, beneficial or harmful, of T-regs in TB, they emphasize the probable importance of these cells.
引用
收藏
页码:117 / 122
页数:6
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