NDLI: Identification of M.tuberculosis-Specific Th1 Cells Expressing CD69 Generated in vivo in Pleural Fluid Cells from Patients with Tuberculous Pleurisy

Content Provider	PubMed Central
Author	Li, Li Qiao, Dan Fu, Xiaoying Lao, Suihua Zhang, Xianlan Wu, Changyou
Editor	Bereswill, Stefan
Copyright Year	2011
Abstract	Th1 cell-mediated immune responses at the site of active infection are important to restrict the growth of M.tuberculosis (MTB) and for the spontaneous resolution of patients with tuberculous pleurisy (TBP). In the present study, we found that without any stimulation, CD4+ T cells in pleural fluid cells (PFCs) from patients with TBP expressed significantly higher levels of CD69 than PBMCs from patients with tuberculosis (TB) or healthy donors. CD4+CD69+ T cells expressed T-bet and IL-12Rβ2. After stimulation with MTB-specific antigens, CD4+CD69+ T cells expressed significantly higher levels of IFN-γ, IL-2 and TNF-α than CD4+CD69− T cells, demonstrating that CD4+CD69+ T cells were MTB-specific Th1 cells. In addition, CD4+CD69+ T cells were mostly polyfunctional Th1 cells that simultaneously produced IFN-γ, IL-2, TNF-α and displayed an effector or effector memory phenotype (CD45RA−CCR7−CD62L−CD27−). Moreover, the percentages of CD4+CD69+ T cells were significantly and positively correlated with polyfunctional T cells. Interestingly, sorted CD4+CD69+ but not CD4+CD69− fractions by flow cytometry produced IFN-γ, IL-2 and TNF-α that were significantly regulated by CD4+CD25+ Treg cells. Taken together, based on the expression of CD69, we found a direct quantitative and qualitative method to detect and evaluate the in vivo generated MTB-specific polyfunctional CD4+ T cells in PFCs from patients with TBP. This method can be used for the potential diagnosis and enrichment or isolation of MTB-specific Th1 cells in the investigations.
Related Links	http://dx.doi.org/10.1371/journal.pone.0023700
Starting Page	23700
File Format	PDF
ISSN	19326203
e-ISSN	19326203
Journal	PLoS ONE
Issue Number	8
Volume Number	6
Language	English
Publisher	Public Library of Science
Publisher Date	2011-08-01
Access Restriction	Open
Rights Holder	Public Library of Science
Subject Keyword	Biochemistry, Genetics and Molecular Biology(all) Agricultural and Biological Sciences(all) Medicine(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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