Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 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\28422568
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Virulence
2017 ; 8
(7
): 1303-1315
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
cGAS-STING-TBK1-IRF3/7 induced interferon-? contributes to the clearing of non
tuberculous mycobacterial infection in mice
#MMPMID28422568
Ruangkiattikul N
; Nerlich A
; Abdissa K
; Lienenklaus S
; Suwandi A
; Janze N
; Laarmann K
; Spanier J
; Kalinke U
; Weiss S
; Goethe R
Virulence
2017[Oct]; 8
(7
): 1303-1315
PMID28422568
show ga
Type I interferons (IFN-I), such as IFN-? and IFN-? are important messengers in
the host response against bacterial infections. Knowledge about the role of IFN-I
in infections by nontuberculous mycobacteria (NTM) is limited. Here we show that
macrophages infected with pathogens of the Mycobacterium avium complex produced
significantly lower amounts of IFN-? than macrophages infected with the
opportunistic pathogen M. smegmatis. To dissect the molecular mechanisms of this
phenomenon, we focused on the obligate pathogen Mycobacterium avium ssp
paratuberculosis (MAP) and the opportunistic M. smegmatis. Viability of both
bacteria was required for induction of IFN-? in macrophages. Both bacteria
induced IFN-? via the cGAS-STING-TBK1-IRF3/7-pathway of IFN-? activation.
Stronger phosphorylation of TBK1 and higher amounts of extracellular bacterial
DNA in the macrophage cytosol were found in M. smegmatis infected macrophages
than in MAP infected macrophages. After intraperitoneal infection of mice, a
strong Ifnb induction by M. smegmatis correlated with clearance of the bacteria.
In contrast, MAP only induced weak Ifnb expression which correlated with
bacterial persistence and increased number of granulomas in the liver. In mice
lacking the type I interferon receptor we observed improved survival of M.
smegmatis while survival of MAP was similar to that in wildtype mice. On the
other hand, treatment of MAP infected wildtype mice with the IFN-I inducer
poly(I:C) or recombinant IFN-? impaired the survival of MAP. This indicates an
essential role of IFN-I in clearing infections by MAP and M. smegmatis. The
expression level of IFN-I is decisive for transient versus persistent NTM
infection.