Lymph nodes-The neglected battlefield in tuberculosis.
Journal
PLoS pathogens
ISSN: 1553-7374
Titre abrégé: PLoS Pathog
Pays: United States
ID NLM: 101238921
Informations de publication
Date de publication:
08 2020
08 2020
Historique:
entrez:
14
8
2020
pubmed:
14
8
2020
medline:
23
9
2020
Statut:
epublish
Résumé
Lymph nodes, particularly thoracic lymph nodes, are among the most common sites of extrapulmonary tuberculosis (TB). However, Mycobacterium tuberculosis (Mtb) infection in these organs is understudied. Aside from being sites of initiation of the adaptive immune system, lymph nodes also serve as niches of Mtb growth and persistence. Mtb infection results in granuloma formation that disrupts and-if it becomes large enough-replaces the normal architecture of the lymph node that is vital to its function. In preclinical models, successful TB vaccines appear to prevent spread of Mtb from the lungs to the lymph nodes. Reactivation of latent TB can start in the lymph nodes resulting in dissemination of the bacteria to the lungs and other organs. Involvement of the lymph nodes may improve Bacille Calmette-Guerin (BCG) vaccine efficacy. Lastly, drug penetration to the lymph nodes is poor compared to blood, lung tissue, and lung granulomas. Future studies on evaluating the efficacy of vaccines and anti-TB drug treatments should include consideration of the effects on thoracic lymph nodes and not just the lungs.
Identifiants
pubmed: 32790739
doi: 10.1371/journal.ppat.1008632
pii: PPATHOGENS-D-20-00662
pmc: PMC7425845
doi:
Substances chimiques
Tuberculosis Vaccines
0
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Review
Langues
eng
Sous-ensembles de citation
IM
Pagination
e1008632Déclaration de conflit d'intérêts
The authors have declared that no competing interests exist.
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