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2017 ; 8
(8
): e3017
Nephropedia Template TP
gab.com Text
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Microenvironment inflammatory infiltrate drives growth speed and outcome of
hepatocellular carcinoma: a prospective clinical study
#MMPMID28837142
Critelli R
; Milosa F
; Faillaci F
; Condello R
; Turola E
; Marzi L
; Lei B
; Dituri F
; Andreani S
; Sighinolfi P
; Manni P
; Maiorana A
; Caporali C
; di Benedetto F
; Del Buono M
; De Maria N
; Schepis F
; Martinez-Chantar ML
; Giannelli G
; Villa E
Cell Death Dis
2017[Aug]; 8
(8
): e3017
PMID28837142
show ga
In HCC, tumor microenvironment, heavily influenced by the underlying chronic
liver disease, etiology and stage of the tissue damage, affects tumor progression
and determines the high heterogeneity of the tumor. Aim of this study was to
identify the circulating and tissue components of the microenvironment
immune-mediated response affecting the aggressiveness and the ensuing clinical
outcome. We analyzed the baseline paired HCC and the surrounding tissue biopsies
from a prospective cohort of 132 patients at the first diagnosis of HCC for
immunolocalization of PD-1/PD-L1, FoxP3, E-cadherin, CLEC2 and for a panel of 82
microRNA associated with regulation of angiogenesis, cell proliferation, cell
signaling, immune control and autophagy. Original microarray data were also
explored. Serum samples were analyzed for a panel of 19 cytokines. Data were
associated with biochemical data, histopathology and survival. Patients with a
more aggressive disease and shorter survival, who we named fast-growing
accordingly to the tumor doubling time, at presentation had significantly higher
AFP levels, TGF-?1 and Cyphra 21-1 levels. Transcriptomic analysis evidenced a
significant downregulation of CLEC2 and upregulation of several
metalloproteinases. A marked local upregulation of both PD-1 and PD-L1, a
concomitant FoxP3-positive lymphocytic infiltrate, a loss of E-cadherin, gain of
epithelial-mesenchymal transition (EMT) phenotype and extreme poor
differentiation at histology were also present. Upregulated microRNA in
fast-growing HCCs are associated with TGF-? signaling, angiogenesis and
inflammation. Our data show that fast HCCs are characterized not only by
redundant neo-angiogenesis but also by unique features of distinctively
immunosuppressed microenvironment, prominent EMT, and clear-cut activation of
TGF?1 signaling in a general background of long-standing and permanent
inflammatory state.