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2017 ; 7
(1
): 10636
Nephropedia Template TP
gab.com Text
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English Wikipedia
Increased PD-L1 expression and IL-6 secretion characterize human lung
tumor-derived perivascular-like cells that promote vascular leakage in a
perfusable microvasculature model
#MMPMID28878242
Bichsel CA
; Wang L
; Froment L
; Berezowska S
; Müller S
; Dorn P
; Marti TM
; Peng RW
; Geiser T
; Schmid RA
; Guenat OT
; Hall SRR
Sci Rep
2017[Sep]; 7
(1
): 10636
PMID28878242
show ga
Pericytes represent important support cells surrounding microvessels found in
solid organs. Emerging evidence points to their involvement in tumor progression
and metastasis. Although reported to be present in the human lung, their specific
presence and functional orientation within the tumor microenvironment in
non-small cell lung cancer (NSCLC) has not yet been adequately studied. Using a
multiparameter approach, we prospectively identified, sorted and expanded
mesenchymal cells from human primary NSCLC samples based on co-expression of CD73
and CD90 while lacking hematopoietic and endothelial lineage markers (CD45, CD31,
CD14 and Gly-A) and the epithelial marker EpCAM. Compared to their normal
counterpart, tumor-derived Lineage-EpCAM-CD73+CD90+ cells showed enhanced
expression of the immunosuppressive ligand PD-L1, a higher constitutive secretion
of IL-6 and increased basal ?SMA levels. In an in vitro model of 3D microvessels,
both tumor-derived and matched normal Lineage-EpCAM-CD73+CD90+ cells supported
the assembly of perfusable vessels. However, tumor-derived
Lineage-EpCAM-CD73+CD90+ cells led to the formation of vessels with significantly
increased permeability. Together, our data show that perivascular-like cells
present in NSCLC retain functional abnormalities in vitro. Perivascular-like
cells as an eventual target in NSCLC warrants further investigation.