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Related Concept Videos

T Cell Types and Functions01:24

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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.
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Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
Causative Organism
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Tuberculosis, more commonly referred to as TB, is an infectious disease stemming from Mycobacterium tuberculosis. While it primarily impacts the lungs, TB can also affect other body areas. Given its severity and global impact, timely and accurate diagnosis is crucial for controlling its spread and improving patient outcomes.
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Tuberculosis, or TB, is a bacterial infectious disease caused by Mycobacterium tuberculosis. While its primary impact is on the lungs, leading to pulmonary tuberculosis, it can also affect various other organs, a condition referred to as extrapulmonary tuberculosis.
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Tuberculosis (TB) is a contagious infection primarily affecting the lung parenchyma but which can also affect other body parts. TB can be classified based on disease development, presentation, and the affected anatomical site.
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Isolation and Th17 Differentiation of Na&#239;ve CD4 T Lymphocytes
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Context-specific roles for IL-17 in tuberculosis.

Mahlatse Maseeme1,2, Liku B Tezera3, Mahdad Noursadeghi4

  • 1Africa Health Research Institute, Durban, South Africa.

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|April 21, 2026
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Summary
This summary is machine-generated.

Interleukin 17 (IL-17) plays a dual role in tuberculosis (TB), acting as both a protector and a cause of disease. Its function in TB pathogenesis depends heavily on the specific context.

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Area of Science:

  • Immunology
  • Infectious Diseases
  • Microbiology

Background:

  • Interleukin 17 (IL-17) has a paradoxical role in tuberculosis (TB), a deadly infectious disease.
  • Studies show IL-17 is crucial for protection against TB infection and disease.
  • Conversely, IL-17 is implicated in the immunopathology driving TB morbidity and mortality.

Purpose of the Study:

  • To synthesize arguments for IL-17's protective and pathogenic roles in human TB.
  • To address the conundrum of IL-17's dual function in TB.

Main Methods:

  • Review of immune correlates of protection studies.
  • Analysis of research on IL-17's role in TB pathogenesis.
  • Synthesis of evidence regarding IL-17's impact on TB infection, disease, and host-directed therapies.

Main Results:

  • IL-17 responses are identified as key in natural and vaccine-induced protection against TB.
  • IL-17 is also proposed as a major driver of the immunopathology in TB.
  • Conflicting research directions exist: some aim to enhance IL-17 responses for vaccines, while others target blocking IL-17 for therapy.

Conclusions:

  • The role of IL-17 in human TB is context-dependent, acting as both friend and foe.
  • Understanding this duality is critical for developing effective TB vaccines and therapies.
  • Further research is needed to elucidate the specific contexts that determine IL-17's function in TB.