Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=22037624
&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215
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 261.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 261.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 261.2 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\22037624
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Immunol+Lett
2012 ; 141
(2
): 227-34
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Potential role for alternatively activated macrophages in the secondary bacterial
infection during recovery from influenza
#MMPMID22037624
Chen WH
; Toapanta FR
; Shirey KA
; Zhang L
; Giannelou A
; Page C
; Frieman MB
; Vogel SN
; Cross AS
Immunol Lett
2012[Jan]; 141
(2
): 227-34
PMID22037624
show ga
PURPOSE: Secondary bacterial infections are a common complication of influenza.
Innate immune host defenses appear to be impaired following influenza, leading to
susceptibility to subsequent bacterial infections. Alternatively activated
macrophages (AAM) in the lungs may play a critical role in eliciting the
hypersusceptibility to secondary bacterial pneumonia. METHODS: C57BL6 mice were
challenged with sublethal doses of the mouse-adapted A/PR/8/34 (PR8) influenza
virus or saline and allowed to recover. At complete recovery (day 14), mice were
re-challenged with sublethal doses of Streptococcus pneumoniae serotype 3 (Sp3).
RESULTS: PR8-recovered mice developed a rapidly fatal pulmonary infection to a
100-fold sublethal pneumococcal challenge, whereas PR8-naive mice demonstrated no
mortality or illness. The cytokines which induce AAM (IL-4 and IL-13) and the
expression of genes associated with AAM (Arginase-1, FIZZ1, and YM1) were
elevated after PR8 infection. Flow cytometry suggests that alveolar macrophages
demonstrate the AAM-phenotype, as indicated by MGL-1 and MHCII expression, in
response to PR8 infection. Recovery from PR8 was associated with blunted cytokine
responses to TLR ligands. CONCLUSIONS: The mechanisms of immune regulation during
recovery from influenza are being elucidated. We provide evidence that pulmonary
AAM are induced during influenza infection and may contribute to the elicitation
of hypersusceptibility to a secondary bacterial infection.
|Animals
[MESH]
|Arginase/genetics/metabolism
[MESH]
|Cells, Cultured
[MESH]
|Complement Pathway, Alternative
[MESH]
|Disease Susceptibility
[MESH]
|Gene Expression Regulation
[MESH]
|Influenza A virus/*immunology/pathogenicity
[MESH]
|Intercellular Signaling Peptides and Proteins/genetics
[MESH]