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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.
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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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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.
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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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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.
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Other Pulmonary Disorders01:17

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Respiratory disorders encompass a range of conditions with varying levels of severity. Asthma, marked by chronic airway inflammation and hypersensitivity, is one such condition. It can lead to airway obstruction due to factors like bronchial spasms, mucosal edema, increased mucus secretion, or epithelial damage. Asthma triggers are diverse, ranging from allergens to emotional upset, and treatment focuses on both immediate relief through bronchodilators and long-term inflammation suppression.
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Analysis of 18FDG PET/CT Imaging as a Tool for Studying Mycobacterium tuberculosis Infection and Treatment in Non-human Primates
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Tuberculosis: hey there, lonely guy!

Jun-Hao Zhu1, Babak Javid2

  • 1Centre for Infectious Diseases Research, Tsinghua University School of Medicine, Beijing 100084, China.

Molecular Cell
|March 22, 2015
PubMed
Summary
This summary is machine-generated.

Mycobacterial proteasomes use a substrate, Rv1205, similar to the LONELY GUY enzyme. This Rv1205 protein confers resistance to nitric oxide through proteasome-mediated mechanisms.

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Biochemistry

Background:

  • Nitric oxide (NO) is a critical signaling molecule and a potent antimicrobial agent.
  • Mycobacteria possess unique resistance mechanisms to survive hostile environments, including the presence of NO.
  • The proteasome plays a crucial role in protein degradation and cellular homeostasis in various organisms.

Purpose of the Study:

  • To identify the specific mycobacterial proteasomal substrate responsible for nitric oxide resistance.
  • To elucidate the mechanism by which this substrate confers protection against NO.

Main Methods:

  • Proteomic analysis to identify proteasomal substrates.
  • Genetic manipulation of the Rv1205 gene in Mycobacterium tuberculosis.
  • Assays to measure nitric oxide resistance in wild-type and mutant strains.

Main Results:

  • The study identified Rv1205 as a key substrate of the mycobacterial proteasome.
  • Rv1205 was found to be a homolog of the plant-like enzyme LONELY GUY.
  • Expression of Rv1205 conferred significant resistance to nitric oxide in a proteasome-dependent manner.

Conclusions:

  • The mycobacterial proteasomal substrate Rv1205 is essential for nitric oxide resistance.
  • Rv1205 functions as a proteasome-mediated nitric oxide resistance factor.
  • This finding provides new insights into mycobacterial survival strategies against oxidative stress.