Unbound MEDLINE

Differentiation and recruitment of IL-22-producing helper T cells stimulated by pleural mesothelial cells in tuberculous pleurisy.

Abstract

RATIONALE
IL-22-producing helper T cells (Th22 cells) have been reported to be involved in tuberculosis infection. However, differentiation and immune regulation of Th22 cells in tuberculous pleural effusion (TPE) remain unknown.
OBJECTIVES
To elucidate the mechanism by which Th22 cells differentiate and recruit into the pleural space.
METHODS
The distribution and phenotypic features of Th22 cells in both TPE and blood were determined. The impacts of proinflammatory cytokines and antigen presentation by pleural mesothelial cells (PMCs) on Th22-cell differentiation were explored. The chemoattractant activity of chemokines produced by PMCs for Th22 cells was observed.
MEASUREMENTS AND MAIN RESULTS
Th22 cells were significantly higher in TPE than in blood. IL-1β, IL-6, and/or tumor necrosis factor-α promoted Th22-cell differentiation from CD4(+) T cells. It was found that PMCs expressed CCL20, CCL22, and CCL27, and that TPE and PMC supernatants were chemotactic for Th22 cells. This activity was partly blocked by anti-CCL20, anti-CCL22, and anti-CCL27 antibodies. IL-22 and IL-17 significantly improved PMC wound healing. Moreover, PMCs were able to stimulate CD4(+) T-cell proliferation and Th22-cell differentiation by presenting tuberculosis-specific antigen.
CONCLUSIONS
The overrepresentation of Th22 cells in TPE may be due to pleural cytokines and to PMC-produced chemokines. Our data suggest a collaborative loop between PMCs and Th22 cells in TPE. In particular, PMCs were able to function as antigen-presenting cells to stimulate CD4(+) T-cell proliferation and Th22-cell differentiation.

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  • Publisher Full Text
  • Authors

    Ye ZJ, Zhou Q, Yuan ML, Du RH, Yang WB, Xiong XZ, Huang B, Shi HZ

    Institution

    Department of Respiratory and Critical Care Medicine, Key Laboratory of Pulmonary Diseases of Health Ministry, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.

    Source

    American journal of respiratory and critical care medicine 185:6 2012 Mar 15 pg 660-9

    MeSH

    Antigen-Presenting Cells
    Cell Differentiation
    Epithelium
    Humans
    Immunity, Cellular
    Interleukins
    Lymphocyte Activation
    Pleura
    T-Lymphocyte Subsets
    T-Lymphocytes, Helper-Inducer
    Tuberculosis, Pleural

    Pub Type(s)

    Comparative Study
    Journal Article
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    22199006