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2018 ; 7
(7
): 3321-3330
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Epithelial-mesenchymal transition-converted tumor cells can induce T-cell
apoptosis through upregulation of programmed death ligand 1 expression in
esophageal squamous cell carcinoma
#MMPMID29855157
Thar Min AK
; Okayama H
; Saito M
; Ashizawa M
; Aoto K
; Nakajima T
; Saito K
; Hayase S
; Sakamoto W
; Tada T
; Hanayama H
; Saze Z
; Momma T
; Ohki S
; Sato Y
; Motoyama S
; Mimura K
; Kono K
Cancer Med
2018[Jul]; 7
(7
): 3321-3330
PMID29855157
show ga
Esophageal squamous cell carcinoma (ESCC) is an aggressive tumor, and it is
urgently needed to develop novel therapeutic strategies including immunotherapy.
In this study, we investigated the upregulation of the programmed death ligand 1
(PD-L1) due to epithelial-mesenchymal transition (EMT) in ESCC using an in vitro
treatment system with the EMT inducer, glycogen synthase kinase (GSK)-3
inhibitor, and we also analyzed the correlation of EMT and PD-L1 expression in
the clinical tumor samples of both tissue microarray (TMA) samples (n = 177) and
whole tissue samples (n = 21). As a result, the inhibition of GSK-3? induces EMT
phenotype with upregulated vimentin and downregulated E-cadherin as well as
increased Snail and Zinc finger E box-binding homeobox (ZEB)-1 gene expression.
Simultaneously, we showed that EMT-converted ESCC indicated the upregulation of
PD-L1 at both protein (total and surface) and mRNA levels. Of importance, we
showed that EMT-converted tumor cells have a capability to induce T-cell
apoptosis to a greater extent in comparison to original epithelial type tumor
cells. Furthermore, the immunohistochemical stains of ESCC showed that PD-L1
expression on tumor cells was positively correlated with EMT status in TMA
samples (P = .0004) and whole tissue samples (P = .0029). In conclusion, our in
vitro and in vivo study clearly demonstrated that PD-L1 expression was
upregulated in mesenchymal type tumors of ESCC. These findings provide a strong
rationale for the clinical use of anti-PD-1/anti-PD-L1 monoclonal antibodies for
advanced ESCC patients.