Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 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\27879319
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Biol+Chem
2017 ; 292
(1
): 292-304
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
AMP-activated Kinase (AMPK) Promotes Innate Immunity and Antiviral Defense
through Modulation of Stimulator of Interferon Genes (STING) Signaling
#MMPMID27879319
Prantner D
; Perkins DJ
; Vogel SN
J Biol Chem
2017[Jan]; 292
(1
): 292-304
PMID27879319
show ga
The host protein Stimulator of Interferon Genes (STING) has been shown to be
essential for recognition of both viral and intracellular bacterial pathogens,
but its regulation remains unclear. Previously, we reported that mitochondrial
membrane potential regulates STING-dependent IFN-? induction independently of ATP
synthesis. Because mitochondrial membrane potential controls calcium homeostasis,
and AMP-activated protein kinase (AMPK) is regulated, in part, by intracellular
calcium, we postulated that AMPK participates in STING activation; however, its
role has yet to be been defined. Addition of an intracellular calcium chelator or
an AMPK inhibitor to either mouse macrophages or mouse embryonic fibroblasts
(MEFs) suppressed IFN-? and TNF-? induction following stimulation with the
STING-dependent ligand 5,6-dimethyl xanthnone-4-acetic acid (DMXAA). These
pharmacological findings were corroborated by showing that MEFs lacking AMPK
activity also failed to up-regulate IFN-? and TNF-? after treatment with DMXAA or
the natural STING ligand cyclic GMP-AMP (cGAMP). As a result, AMPK-deficient MEFs
exhibit impaired control of vesicular stomatitis virus (VSV), a virus sensed by
STING that can cause an influenza-like illness in humans. This impairment could
be overcome by pretreatment of AMPK-deficient MEFs with type I IFN, illustrating
that de novo production of IFN-? in response to VSV plays a key role in antiviral
defense during infection. Loss of AMPK also led to dephosphorylation at Ser-555
of the known STING regulator, UNC-51-like kinase 1 (ULK1). However,
ULK1-deficient cells responded normally to DMXAA, indicating that AMPK promotes
STING-dependent signaling independent of ULK1 in mouse cells.