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Related Concept Videos

Pulmonary Tuberculosis II01:28

Pulmonary Tuberculosis II

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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 IV01:26

Pulmonary Tuberculosis IV

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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.
Several diagnostic approaches are used to detect TB. The conventional method is the Tuberculin Skin Test (TST), also known as the Mantoux test. However, this method has...
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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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T Cell Types and Functions01:24

T Cell Types and Functions

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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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Related Experiment Video

Updated: Jul 25, 2025

Application of Long-term cultured Interferon-&#947; Enzyme-linked Immunospot Assay for Assessing Effector and Memory T Cell Responses in Cattle
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Antigen-Induced IL-1RA Production Discriminates Active and Latent Tuberculosis Infection.

Cesar Sanchez1,2, Luis Jaramillo-Valverde1,3, Silvia Capristano1

  • 1Laboratorio de Biotecnología y Biología Molecular, Instituto Nacional de Salud, Lima 15046, Peru.

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|June 28, 2023
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Summary

A new test using novel Mycobacterium tuberculosis peptides and IL-1RA detection can distinguish between active tuberculosis disease (ATBD) and latent tuberculosis infection (LTBI), improving upon current Interferon Gamma Release Assays.

Keywords:
IL-1RAMycobacterium tuberculosisactive tuberculosisbiomarkersimmune responselatent tuberculosis

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Area of Science:

  • Immunology
  • Infectious Diseases
  • Biotechnology

Background:

  • Interferon Gamma Release Assays (IGRA) are standard for detecting Mycobacterium tuberculosis infection.
  • Current IGRAs cannot differentiate between active tuberculosis disease (ATBD) and latent tuberculosis infection (LTBI).
  • A need exists for diagnostic tools that can distinguish between ATBD and LTBI.

Purpose of the Study:

  • To identify novel biomarkers for discriminating between ATBD and LTBI.
  • To develop a more specific diagnostic test for tuberculosis infection status.

Main Methods:

  • Longitudinal studies involving 54 ATBD patients and 51 LTBI patients.
  • Stimulation of cells with overlapping Mycobacterium tuberculosis novel peptides.
  • Analysis of 40 cytokines/chemokines in cell culture supernatants using Luminex technology.
  • Calculation of Area Under the Curve (AUC) to analyze longitudinal analyte levels.

Main Results:

  • A specific combination of peptides (Rv0849-12, Rv2031c-14, Rv2031c-5, and Rv2693-06) was identified.
  • Detection of IL-1RA in culture supernatants proved significant.
  • The novel peptide combination plus IL-1RA detection demonstrated ability to discriminate between LTBI and ATBD.

Conclusions:

  • A novel peptide cocktail combined with IL-1RA detection can differentiate LTBI from ATBD.
  • This finding offers a potential new diagnostic approach for tuberculosis.
  • Further validation may lead to improved tuberculosis diagnostics.