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Related Concept Videos

Pulmonary Tuberculosis I01:29

Pulmonary Tuberculosis I

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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
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
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Pulmonary Tuberculosis II01:28

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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.
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
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Pulmonary Tuberculosis V01:28

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Medical management of tuberculosis (TB) patients involves a comprehensive approach that includes diagnosis, treatment, and monitoring. The specific strategies can vary depending on the type of tuberculosis (latent or active), the patient's overall health status, and other considerations.
Latent tuberculosis infection occurs when TB bacteria are present in a person's body, but are not causing illness or symptoms. It is not contagious, and preventive treatment is crucial to avoid the...
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Pulmonary Tuberculosis III01:31

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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.
The first classification is based on the development of the disease, and it includes the following categories:
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Pulmonary Tuberculosis IV01:26

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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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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
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Fluorescence Assays for the Study of Mycobacterium tuberculosis Interaction with the Immune Receptor SLAMF1
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Fluorescence Assays for the Study of Mycobacterium tuberculosis Interaction with the Immune Receptor SLAMF1

Published on: February 28, 2025

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CD39 pathway inhibits Th1 cell function in tuberculosis.

Ying Luo1, Ying Xue2, Qun Lin1

  • 1Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.

Immunology
|May 16, 2022
PubMed
Summary
This summary is machine-generated.

CD39 pathway is highly expressed on Th1 cells in tuberculosis (TB) patients, correlating with impaired T-cell function. Inhibiting CD39 may enhance immune responses against Mycobacterium tuberculosis (MTB).

Keywords:
CD39Th1 cellsinhibitory roletuberculosis

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Area of Science:

  • Immunology
  • Infectious Diseases
  • Molecular Biology

Background:

  • The role of the CD39 pathway in T-helper 1 (Th1) cell function during tuberculosis (TB) is not well understood.
  • Mycobacterium tuberculosis (MTB) infection poses a significant global health challenge, necessitating research into host immune responses.

Purpose of the Study:

  • To investigate the mechanism by which the CD39 pathway modulates Th1 cell function during MTB infection.
  • To determine the expression of CD39 on host immune cells in TB patients and its relationship with Th1 cell function.

Main Methods:

  • Flow cytometry was used to analyze CD39 expression on Th1 cells and associated markers (activation, exhaustion, apoptosis) in TB patients and healthy controls.
  • Tetramer analysis identified TB-specific CD4+ cells expressing CD39.
  • Transcriptome sequencing compared gene expression between CD39+ and CD39- Th1 cells.
  • In vitro inhibition of the CD39 pathway was performed.

Main Results:

  • TB patients exhibited significantly higher CD39 expression on Th1 cells compared to healthy controls.
  • CD39+ Th1 cells showed increased exhaustion, apoptosis, and reduced proliferation and polyfunctionality.
  • CD39 was predominantly expressed on TB-specific CD4+ cells, correlating with impaired function.
  • Inhibition of CD39 enhanced Th1 cell activation, proliferation, and cytokine production.
  • CD39 expression negatively correlated with nutritional status and decreased after anti-TB treatment.

Conclusions:

  • CD39 is highly expressed on TB-specific Th1 cells and is linked to their exhausted phenotype.
  • The CD39 pathway plays a critical role in regulating Th1 cell function during MTB infection.
  • Targeting the CD39 pathway presents a potential therapeutic strategy for TB treatment.