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2014 ; 74
(21
): 5963-77
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Network modeling of TGF? signaling in hepatocellular carcinoma
epithelial-to-mesenchymal transition reveals joint sonic hedgehog and Wnt pathway
activation
#MMPMID25189528
Steinway SN
; Zaņudo JG
; Ding W
; Rountree CB
; Feith DJ
; Loughran TP Jr
; Albert R
Cancer Res
2014[Nov]; 74
(21
): 5963-77
PMID25189528
show ga
Epithelial-to-mesenchymal transition (EMT) is a developmental process hijacked by
cancer cells to leave the primary tumor site, invade surrounding tissue, and
establish distant metastases. A hallmark of EMT is the loss of E-cadherin
expression, and one major signal for the induction of EMT is TGF?, which is
dysregulated in up to 40% of hepatocellular carcinoma (HCC). We have constructed
an EMT network of 70 nodes and 135 edges by integrating the signaling pathways
involved in developmental EMT and known dysregulations in invasive HCC. We then
used discrete dynamic modeling to understand the dynamics of the EMT network
driven by TGF?. Our network model recapitulates known dysregulations during the
induction of EMT and predicts the activation of the Wnt and Sonic hedgehog (SHH)
signaling pathways during this process. We show, across multiple murine (P2E and
P2M) and human HCC cell lines (Huh7, PLC/PRF/5, HLE, and HLF), that the TGF?
signaling axis is a conserved driver of mesenchymal phenotype HCC and confirm
that Wnt and SHH signaling are induced in these cell lines. Furthermore, we
identify by network analysis eight regulatory feedback motifs that stabilize the
EMT process and show that these motifs involve cross-talk among multiple major
pathways. Our model will be useful in identifying potential therapeutic targets
for the suppression of EMT, invasion, and metastasis in HCC.