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Related Concept Videos

Pulmonary Tuberculosis II01:28

Pulmonary Tuberculosis II

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...
Pulmonary Tuberculosis I01:29

Pulmonary Tuberculosis I

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...
Tuberculosis01:23

Tuberculosis

Tuberculosis (TB) remains a significant global health concern, primarily targeting the lungs and spreading through airborne transmission. Infection begins when aerosolized droplet nuclei, expelled by an individual with active TB, are inhaled by another person. These microscopic particles carry Mycobacterium tuberculosis, the causative agent of TB. Upon reaching the alveoli, the bacilli are engulfed by alveolar macrophages. However, due to their specialized lipid-rich cell wall, these pathogens...
Pulmonary Tuberculosis III01:31

Pulmonary Tuberculosis III

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:
Pulmonary Tuberculosis V01:28

Pulmonary Tuberculosis V

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 progression...
Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...

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Related Experiment Video

Updated: Jun 10, 2026

Application of Long-term cultured Interferon-γ Enzyme-linked Immunospot Assay for Assessing Effector and Memory T Cell Responses in Cattle
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Published on: July 11, 2015

[CpG motif and tuberculosis immunity].

Saburo Yamamoto1

  • 1Japan BCG Laboratory, 3-1-5, Matsuyama, Kiyose-shi, Tokyo 204-0022, Japan. yamamoto@bcg.gr.jp

Kekkaku : [Tuberculosis]
|July 29, 2010
PubMed
Summary
This summary is machine-generated.

Bacterial DNA containing unmethylated CpG motifs powerfully stimulates the immune system, enhancing vaccine efficacy against tuberculosis. This discovery highlights CpG DNA

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Area of Science:

  • Immunology and Microbiology
  • Molecular Biology
  • Vaccinology

Context:

  • Research identified immunostimulatory effects of bacterial DNA, specifically unmethylated CpG motifs, during studies on BCG components with antitumor activity.
  • CpG motifs, common in bacterial DNA but rare in mammalian DNA, are hypothesized as an evolutionary mechanism to enhance innate immunity against intracellular pathogens.
  • Microbial infections trigger innate immunity via pattern-recognition systems, leading to cytokine production and costimulatory molecule expression for adaptive immunity.

Purpose:

  • To investigate the potential of DNA vaccines incorporating mycobacterial antigens (MPB64 or HSP65) for preventing Mycobacterium tuberculosis growth.
  • To explore the role of immunostimulatory CpG motifs in the development and therapeutic applications of DNA vaccines.

Summary:

  • Unmethylated CpG-DNA stimulates vertebrate immune cells, promoting maturation and Th1 cytokine production, thus acting as an adjuvant for Th1 differentiation.
  • DNA vaccines encoding MPB64 or HSP65 demonstrated protective responses against virulent Mycobacterium tuberculosis challenge in guinea pigs, outperforming control groups.
  • The study discusses the significance of CpG motifs in advancing DNA vaccine technology and therapeutic strategies.

Impact:

  • Provides evidence for the adjuvant properties of CpG motifs in DNA vaccines, potentially improving vaccine design.
  • Demonstrates the efficacy of specific DNA vaccine constructs against Mycobacterium tuberculosis infection in a preclinical model.
  • Suggests CpG-DNA's role in modulating immune responses for therapeutic benefit, particularly in combating intracellular pathogens.