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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Leukoc+Biol
2012 ; 92
(1
): 11-20
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gab.com Text
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English Wikipedia
Highly pathogenic avian influenza viruses inhibit effective immune responses of
human blood-derived macrophages
#MMPMID22442495
Friesenhagen J
; Boergeling Y
; Hrincius E
; Ludwig S
; Roth J
; Viemann D
J Leukoc Biol
2012[Jul]; 92
(1
): 11-20
PMID22442495
show ga
Systemic infections with HPAIVs, such as H5N1, are characterized by cytokine
burst and sepsis. We investigated the role of human monocyte-derived macrophages
in these events after infection with different influenza virus strains.
Macrophages were infected with low pathogenic H1N1 (PR8) or high pathogenic H7N7
(FPV) and H5N1 (KAN-1) subtypes. Macrophages were found to be nonpermissive for
influenza virus propagation. Surprisingly, transcriptome analysis revealed an
insufficient innate immune response of macrophages only to HPAIV infections.
Induction of inflammatory cytokines, as well as type I IFNs, was significantly
attenuated in H5N1- and H7N7-infected cells, contradicting a primary role of
macrophages for the cytokine burst. Furthermore, inflammasome activation was
impaired significantly in HPAIV-infected macrophages. Interestingly, this finding
correlated with a complete suppression of viral protein M2 expression after HPAIV
infection, which is known to be involved in influenza viral inflammasome
activation. In summary, our data provide first evidences for a strategy of how
HPAIVs avoid initial inflammatory responses of macrophages facilitating virus
spreading and progression to the systemic stage of disease.
|*Immunity, Innate
[MESH]
|Animals
[MESH]
|Biomarkers/metabolism
[MESH]
|Blotting, Western
[MESH]
|Cells, Cultured
[MESH]
|Cytokines/metabolism
[MESH]
|Flow Cytometry
[MESH]
|Fluorescent Antibody Technique
[MESH]
|Gene Expression Profiling
[MESH]
|Humans
[MESH]
|Immunoenzyme Techniques
[MESH]
|Influenza A Virus, H1N1 Subtype/*pathogenicity
[MESH]
|Influenza A Virus, H5N1 Subtype/*pathogenicity
[MESH]
|Influenza A Virus, H7N7 Subtype/*pathogenicity
[MESH]