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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Cancer+Res
2018 ; 8
(3
): 489-501
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
TGF-?1 expression in regulatory NK1 1(-)CD4(+)NKG2D(+) T cells dependents on the
PI3K-p85?/JNK, NF-?B and STAT3 pathways
#MMPMID29637003
Han S
; Ding S
; Miao X
; Lin Z
; Lu G
; Xiao W
; Ding Y
; Qian L
; Zhang Y
; Jia X
; Zhu G
; Gong W
Am J Cancer Res
2018[]; 8
(3
): 489-501
PMID29637003
show ga
NK1.1(-)CD4(+)NKG2D(+) cells exert their immune-regulatory function in tumor as
an unconventional regulatory T cell subset through the production of TGF-?1;
however, the molecular mechanisms involving with the activation of nuclear
factors for TGF-?1 transcription remain unclear. Here we determined that the
PI3K-p85? subunit was specifically activated in NK1.1(-)CD4(+)NKG2D(+) cells
following an 8-hour stimulation by sRAE-1 or ?-CD3/sRAE-1, subsequently leading
to the activation of PI3K-p110, Akt, and JNK. On the contrary, ?-CD3/?-CD28
stimulation did not induce the activation of PI3K-p85 and JNK. Consequently,
activation of the nuclear transcription factor AP-1 as a consequence of JNK
activation regulated TGF-?1 expression in NK1.1(-)CD4(+)NKG2D(+) cells.
Furthermore, activation of NF-?B in NK1.1(-)CD4(+)NKG2D(+) cells resulted from
both protein kinase C activation downstream of TCR/CD3 signaling and PI3K
activation induced by NKG2D engagement. The STAT3-Y705 phosphorylation, as
activated by PI3K, under stimulations of the sRAE-1 or ?-CD3/sRAE-1 also
contributed to the TGF-?1 expression in NK1.1(-)CD4(+)NKG2D(+) cells. Moreover,
ChIP assay confirmed that STAT3 was capable of binding with the promoter regions
of TGF-?1. In conclusion, our data showed that the TGF-?1 transcription in
NK1.1(-)CD4(+)NKG2D(+) cells induced by sRAE-1 or ?-CD3/sRAE-1 was involved with
the AP-1, NF-?B, and STAT3 signaling pathways; therefore, regulation of AP-1,
NF-?B, and STAT3 activation may play important roles in the development and
function of NK1.1(-)CD4(+)NKG2D(+) cells.