Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=28408365
&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 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 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\28408365
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Physiol+Lung+Cell+Mol+Physiol
2017 ; 313
(1
): L138-L153
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Immunomodulators targeting MARCO expression improve resistance to postinfluenza
bacterial pneumonia
#MMPMID28408365
Wu M
; Gibbons JG
; DeLoid GM
; Bedugnis AS
; Thimmulappa RK
; Biswal S
; Kobzik L
Am J Physiol Lung Cell Mol Physiol
2017[Jul]; 313
(1
): L138-L153
PMID28408365
show ga
Downregulation of the alveolar macrophage (AM) receptor with collagenous
structure (MARCO) leads to susceptibility to postinfluenza bacterial pneumonia, a
major cause of morbidity and mortality. We sought to determine whether
immunomodulation of MARCO could improve host defense and resistance to secondary
bacterial pneumonia. RNAseq analysis identified a striking increase in MARCO
expression between days 9 and 11 after influenza infection and indicated
important roles for Akt and Nrf2 in MARCO recovery. In vitro, primary human
AM-like monocyte-derived macrophages (AM-MDMs) and THP-1 macrophages were treated
with IFN? to model influenza effects. Activators of Nrf2 (sulforaphane) or Akt
(SC79) caused increased MARCO expression and a MARCO-dependent improvement in
phagocytosis in IFN?-treated cells and improved survival in mice with
postinfluenza pneumococcal pneumonia. Transcription factor analysis also
indicated a role for transcription factor E-box (TFEB) in MARCO recovery.
Overexpression of TFEB in THP-1 cells led to marked increases in MARCO. The
ability of Akt activation to increase MARCO expression in IFN?-treated AM-MDMs
was abrogated in TFEB-knockdown cells, indicating Akt increases MARCO expression
through TFEB. Increasing MARCO expression by targeting Nrf2 signaling or the
Akt-TFEB-MARCO pathway are promising strategies to improve bacterial clearance
and survival in postinfluenza bacterial pneumonia.