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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 Onco+Targets+Ther
2018 ; 11
(ä): 1157-1171
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SIRT1 overexpression protects non-small cell lung cancer cells against
osteopontin-induced epithelial-mesenchymal transition by suppressing NF-?B
signaling
#MMPMID29535539
Li X
; Jiang Z
; Li X
; Zhang X
Onco Targets Ther
2018[]; 11
(ä): 1157-1171
PMID29535539
show ga
Osteopontin (OPN) is a promoter for tumor progression. It has been reported to
promote non-small cell lung cancer (NSCLC) progression via the activation of
nuclear factor-?B (NF-?B) signaling. As the increased acetylation of NF-?B p65 is
linked to NF-?B activation, the regulation of NF-?B p65 acetylation could be a
potential treatment target for OPN-induced NSCLC progression. Sirtuin 1 (SIRT1)
is a deacetylase, and the role of SIRT1 in tumor progression is still
controversial. The effect and mechanism of SIRT1 on OPN-induced tumor progression
remains unknown. The results presented in this research demonstrated that OPN
inhibited SIRT1 expression and promoted NF-?B p65 acetylation in NSCLC cell lines
(A549 and NCI-H358). In this article, overexpression of SIRT1 was induced by
infection of SIRT1-overexpressing lentiviral vectors. The overexpression of SIRT1
protected NSCLC cells against OPN-induced NF-?B p65 acetylation and
epithelial-mesenchymal transition (EMT), as indicated by the reduction of
OPN-induced changes in the expression levels of EMT-related markers and cellular
morphology. Furthermore, SIRT1 overexpression significantly attenuated
OPN-induced cell proliferation, migration and invasion. Moreover, overexpression
of SIRT1 inhibited OPN-induced NF-?B activation. As OPN induced NSCLC cell EMT
through activation of NF-?B signaling, OPN-induced SIRT1 downregulation may play
an important role in NSCLC cell EMT via NF-?B signaling. The results suggest that
SIRT1 could be a tumor suppressor to attenuate OPN-induced NSCLC progression
through the regulation of NF-?B signaling.