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2018 ; 14
(ä): 59-71
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Yap promotes hepatocellular carcinoma metastasis and mobilization via governing
cofilin/F-actin/lamellipodium axis by regulation of JNK/Bnip3/SERCA/CaMKII
pathways
#MMPMID28869833
Shi C
; Cai Y
; Li Y
; Li Y
; Hu N
; Ma S
; Hu S
; Zhu P
; Wang W
; Zhou H
Redox Biol
2018[Apr]; 14
(ä): 59-71
PMID28869833
show ga
Despite the increasingly important role of Hippo-Yap in hepatocellular carcinoma
(HCC) development and progression, little insight is available at the time
regarding the specifics interaction of Yap and cancer cells migration. Here, we
identified the mechanism by which tumor-intrinsic Yap deletion resulted in HCC
migratory inhibition. Yap was greatly upregulated in HCC and its expression
promoted the cells migration. Functional studies found that knockdown of Yap
induced JNK phosphorylation which closely bound to the Bnip3 promoter and
contributed to Bnip3 expression. Higher Bnip3 employed excessive mitophagy
leading to mitochondrial dysfunction and ATP shortage. The insufficient ATP
inactivated SERCA and consequently triggered intracellular calcium overload. As
the consequence of calcium oscillation, Ca/calmodulin-dependent protein kinases
II (CaMKII) was signaled and subsequently inhibited cofilin activity via
phosphorylated modification. The phosphorylated cofilin failed to manipulate
F-actin polymerization and lamellipodium formation, resulting into the impairment
of lamellipodium-based migration. Collectively, our results identified Hippo-Yap
as the tumor promoter in hepatocellular carcinoma that mediated via activation of
cofilin/F-actin/lamellipodium axis by limiting JNK-Bnip3-SERCA-CaMKII pathways,
with potential application to HCC therapy involving cancer metastasis.
|*Signal Transduction
[MESH]
|Actin Depolymerizing Factors/*metabolism
[MESH]
|Actins/*metabolism
[MESH]
|Calcium-Calmodulin-Dependent Protein Kinase Type 2/metabolism
[MESH]