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Related Concept Videos

T Cell Types and Functions01:24

T Cell Types and Functions

When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

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Related Experiment Video

Updated: Jun 13, 2026

Trans-vivo Delayed Type Hypersensitivity Assay for Antigen Specific Regulation
11:49

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Published on: May 2, 2013

Immunoregulation in TB: observations and implications.

Jerrold J Ellner1

  • 1Boston University and Boston Medical Center, Boston, MA, USA. jerrold.ellner@bumc.org

Clinical and Translational Science
|May 7, 2010
PubMed
Summary

Active tuberculosis (TB) involves systemic immunosuppression and local inflammation, driven by factors like transforming growth factor beta and interleukin-10. Immune therapies should target these suppressive factors, as vaccines may worsen disease.

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Area of Science:

  • Immunology
  • Infectious Diseases
  • Pulmonology

Background:

  • Understanding immune system regulation during active tuberculosis (TB) is crucial.
  • Pulmonary TB exhibits transient systemic immunosuppression and local inflammation.

Purpose of the Study:

  • To elucidate the mechanisms of immune dysregulation in active pulmonary TB.
  • To inform the development of targeted immunotherapies and vaccine strategies for TB.

Main Methods:

  • Analysis of immune factors in systemic circulation, lung tissue, and pleural fluid.
  • Assessment of T-cell function and apoptosis in TB patients.

Main Results:

  • Systemic immunosuppression in TB is linked to elevated transforming growth factor beta (TGF-β) and interleukin-10 (IL-10).
  • Local inflammation in the lungs and pleural fluid shows increased immunosuppressive factors and apoptosis.
  • A primary T-cell defect contributes to the overall immune response.

Conclusions:

  • Immune-based therapies for TB should focus on neutralizing immunosuppressive factors (TGF-β, IL-10) rather than boosting an already active immune response.
  • Partially effective vaccines may pose a risk of disease exacerbation in TB patients.