The production of nitric oxide and other reactive nitrogen intermediates (RNI) by macrophages helps to control infection by Mycobacterium tuberculosis (Mtb). However, the protection is imperfect and infection persists. To identify genes that Mtb requires to resist RNI, we screened 10,100 Mtb transposon mutants for hypersusceptibility to acidified nitrite. We found 12 mutants with insertions in seven genes representing six pathways, including the repair of DNA (uvrB) and the synthesis of a flavin cofactor (fbiC). Five mutants had insertions in proteasome-associated genes. An Mtb mutant deficient in a presumptive proteasomal adenosine triphosphatase was attenuated in mice, and exposure to proteasomal protease inhibitors markedly sensitized wild-type Mtb to RNI. Thus, the mycobacterial proteasome serves as a defense against oxidative or nitrosative stress.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1126/science.1091176 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The association between secondhand smoke exposure and risk of developing active tuberculosis in individuals with latent tuberculosis infection: a systematic literature review.
Ann Ig
January 2025
Department of Environmental Health, Faculty of Public Health, University of Indonesia, Indonesia.
Background: Tuberculosis is one of the leading causes of death from infectious diseases in the world, with approximately 25% of the global population having latent tuberculosis infection. Secondhand smoke exposure has been recognised as a significant risk factor in the development of active Tuberculosis in individuals with latent tuberculosis infection.
Study Design And Methods: This study used the Systematic Literature Review method based on PRISMA guidelines.
How could emerging nanomedicine-based tuberculosis treatments outperform conventional approaches?
Nanomedicine (Lond)
January 2025
School of Integrative Engineering, Chung-Ang University, Seoul, Republic of Korea.
Mycobacteriophages are viruses that specifically infect bacteria of the Mycobacterium genus. A substantial collection of mycobacteriophages has been isolated and characterized, offering valuable insights into their diversity and evolution. This collection also holds significant potential for therapeutic applications, particularly as an alternative to antibiotics in combating drug-resistant bacterial strains.
View Article and Find Full Text PDFSystemic lupus erythematosus and pulmonary tuberculosis in a patient developing acute-onset type 1 diabetes.
Diabetol Int
January 2025
Department of Endocrinology and Diabetes, NTT Medical Center Tokyo, 141-86255-9-22 Higashi-Gotanda, Shinagawa-ku, Tokyo Japan.
A 73-year-old Japanese woman was admitted to our hospital with anorexia, weight loss, and fever. A few weeks prior to admission, she became aware of anorexia. She was leukopenic, complement-depleted, and positive for antinuclear antibodies and anti-double stranded DNA antibodies.
View Article and Find Full Text PDFDisseminated nontuberculous mycobacteriosis due to subsp. infection in a reindeer from a zoo.
J Vet Diagn Invest
January 2025
Brookfield Zoo Chicago, Brookfield, IL, USA.
Bacteria in the complex and nontuberculous mycobacteria may affect a variety of animal species under human care and pose public health risks as zoonotic pathogens. A case of sudden onset of lethargy and increased respiratory effort in a 5-y-old, intact female reindeer () under managed care had progressed to severe dyspnea despite aggressive treatment. The animal was euthanized due to poor prognosis.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!