Deprecated: Implicit conversion from float 227.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 227.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 227.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 227.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 227.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 227.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 227.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 227.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 227.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\22072963
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+Pathog
2011 ; 7
(11
): e1002341
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
The critical role of Notch ligand Delta-like 1 in the pathogenesis of influenza A
virus (H1N1) infection
#MMPMID22072963
Ito T
; Allen RM
; Carson WF 4th
; Schaller M
; Cavassani KA
; Hogaboam CM
; Lukacs NW
; Matsukawa A
; Kunkel SL
PLoS Pathog
2011[Nov]; 7
(11
): e1002341
PMID22072963
show ga
Influenza A viral infections have been identified as the etiologic agents for
historic pandemics, and contribute to the annual mortality associated with acute
viral pneumonia. While both innate and acquired immunity are important in
combating influenza virus infection, the mechanism connecting these arms of the
immune system remains unknown. Recent data have indicated that the Notch system
is an important bridge between antigen-presenting cells (APCs) and T cell
communication circuits and plays a central role in driving the immune system to
overcome disease. In the present study, we examine the role of Notch signaling
during influenza H1N1 virus infection, focusing on APCs. We demonstrate here that
macrophages, but not dendritic cells (DCs), increased Notch ligand Delta-like 1
(Dll1) expression following influenza virus challenge. Dll1 expression on
macrophages was dependent on retinoic acid-inducible gene-I (RIG-I) induced
type-I IFN pathway, and not on the TLR3-TRIF pathway. We also found that
IFN?-Receptor knockout mice failed to induce Dll1 expression on lung macrophages
and had enhanced mortality during influenza virus infection. Our results further
showed that specific neutralization of Dll1 during influenza virus challenge
induced higher mortality, impaired viral clearance, and decreased levels of
IFN-?. In addition, we blocked Notch signaling by using ?-secretase inhibitor
(GSI), a Notch signaling inhibitor. Intranasal administration of GSI during
influenza infection also led to higher mortality, and higher virus load with
excessive inflammation and an impaired production of IFN-? in lungs. Moreover,
Dll1 expression on macrophages specifically regulates IFN-? levels from CD4(+)and
CD8(+)T cells, which are important for anti-viral immunity. Together, the results
of this study show that Dll1 positively influences the development of anti-viral
immunity, and may provide mechanistic approaches for modifying and controlling
the immune response against influenza H1N1 virus infection.
|Animals
[MESH]
|Antigen-Presenting Cells/immunology
[MESH]
|CD4-Positive T-Lymphocytes/immunology
[MESH]
|CD8-Positive T-Lymphocytes/immunology
[MESH]
|Calcium-Binding Proteins
[MESH]
|DEAD Box Protein 58
[MESH]
|DEAD-box RNA Helicases/metabolism
[MESH]
|Dendritic Cells/immunology/metabolism
[MESH]
|Humans
[MESH]
|Influenza A Virus, H1N1 Subtype/*immunology/*pathogenicity
[MESH]
|Intercellular Signaling Peptides and Proteins/biosynthesis/*metabolism
[MESH]