Poor stimulation of bovine dendritic cells by Mycobacterium bovis culture supernatant and surface extract is associated with decreased activation of ERK and NF-κB and higher expression of SOCS1 and 3.
Innate Immun
; 26(6): 537-546, 2020 08.
Article
em En
| MEDLINE
| ID: mdl-32513050
ABSTRACT
The cell envelope of pathogenic mycobacteria interfaces with the host. As such, the interaction of bacterial products localized at or released from the cell surface with the host's immune system can determine the fate of the bacterium in its host. In this study, the effects of three different types of Mycobacterium bovis cell envelope fractions-purified protein derivative, total cell wall lipids and culture supernatant and surface extract-on bovine dendritic cells were assessed. We found that the culture supernatant and surface extract fraction induced little to no production of the pro-inflammatory cytokines TNF-α and IL-12 in bovine dendritic cells. Moreover, this muted response was associated with poor activation of ERK and NF-κB, both of which are critical for the pro-inflammatory response. Furthermore, culture supernatant and surface extract treatment increased the expression of suppressor of cytokine signaling 1 and 3, both of which are negative regulators of pro-inflammatory signaling, in bovine dendritic cells. These observations taken together suggest the M. bovis culture supernatant and surface extract fraction contain immunomodulatory molecules that may aid in M. bovis pathogenesis.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tuberculose Bovina
/
Células Dendríticas
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NF-kappa B
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Proteína 1 Supressora da Sinalização de Citocina
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Proteína 3 Supressora da Sinalização de Citocinas
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Mycobacterium bovis
Tipo de estudo:
Risk_factors_studies
Limite:
Animals
Idioma:
En
Revista:
Innate Immun
Assunto da revista:
ALERGIA E IMUNOLOGIA
/
BACTERIOLOGIA
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Canadá