Innate myeloid cell TNFR1 mediates first line defence against primary Mycobacterium tuberculosis infection.
Sci Rep
; 6: 22454, 2016 Mar 02.
Article
em En
| MEDLINE
| ID: mdl-26931771
ABSTRACT
TNF is crucial for controlling Mycobacterium tuberculosis infection and understanding how will help immunomodulating the host response. Here we assessed the contribution of TNFR1 pathway from innate myeloid versus T cells. We first established the prominent role of TNFR1 in haematopoietic cells for controlling M. tuberculosis in TNFR1 KO chimera mice. Further, absence of TNFR1 specifically on myeloid cells (M-TNFR1 KO) recapitulated the uncontrolled M. tuberculosis infection seen in fully TNFR1 deficient mice, with increased bacterial burden, exacerbated lung inflammation, and rapid death. Pulmonary IL-12p40 over-expression was attributed to a prominent CD11b(+) Gr1(high) cell population in infected M-TNFR1 KO mice. By contrast, absence of TNFR1 on T-cells did not compromise the control of M. tuberculosis infection over 6-months. Thus, the protective TNF/TNFR1 pathway essential for controlling primary M. tuberculosis infection depends on innate macrophage and neutrophil myeloid cells, while TNFR1 pathway in T cells is dispensable.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Células da Medula Óssea
/
Receptores Tipo I de Fatores de Necrose Tumoral
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Imunidade Inata
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Mycobacterium tuberculosis
Limite:
Animals
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article